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Telecommunications > Transmitter > Diversity DiversityDiversity patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.02/22/07 - 20070042725 - Systems and methods for tuning an antenna configuration in a mobile communication device A mobile communication device comprises a plurality of spatially and/or polar diverse antenna configurations. Signals received by each of the plurality of antenna configurations are combined in a combiner and passed to a rake receiver that can be configured to combine the signals received by each of the plurality of ... 02/15/07 - 20070037529 - Radio tag communication apparatus A radio tag communication apparatus having a broad communicable range and a simple arrangement, is provided. Since there are provided a transmission antenna selection control portion for selecting a single transmission-reception antenna element to transmit a transmission signal, from a plurality of transmission-reception antenna elements, and a reception signal synthesizing ... 02/15/07 - 20070037528 - Wireless communication device using adaptive beamforming A method and apparatus is disclosed herein for wireless communication with adaptive beamforming. In one embodiment, the apparatus comprises a processor, a radio frequency (RF) transmitter having a digitally controlled phased array antenna coupled to and controlled by the processor to transmit content using adaptive beamforming, and an interface to ... 02/08/07 - 20070032206 - Spatial multiplexing detection apparatus and method in mimo system Provided are a spatial multiplexing apparatus and method in a Multiple Input Multiple Output (MIMO) system. The spatial multiplexing detection method includes estimating channels of a received signal, and sorting the estimated channels in descending order according to a scheme; generating a subsystem of a minimum unit by nulling an ... 02/01/07 - 20070026819 - Space-time communications determination Apparatus and systems, a well as methods and articles, may operate to determine whether to communicate using a space-time communications technique responsive to an indication derived from processing a short time sequence. ... 01/25/07 - 20070021075 - Radio apparatus A plurality of antennas respectively conveys burst signals that use a plurality of sub carriers and contain control information for communications. When a plurality of sub carriers are used, a cyclic time shifting in a cycle in time domain is executed, per antenna, with a time-shift amount corresponding to each ... 01/11/07 - 20070010213 - Secure rfid packaging Methods and systems are provided for preparing radio-frequency devices for secure distribution. Multiple such radio-frequency devices are received. Each device has an embedded radio-frequency transponder. Each radio-frequency devices is moved sequentially to stations of a preparation device. At a first station, a radio-frequency identification code assigned to the radio-frequency device ... 01/04/07 - 20070004347 - Wireless communication device and method for coordinated channel access with reduced latency in a wireless network Wireless communication devices and methods for coordinated channel access with reduced latency in a wireless network are generally described herein. Other embodiments may be described and claimed. ... 12/28/06 - 20060292998 - Wireless signal transmitter A wireless signal transmitter is disclosed as including a sensor for detecting signals signifying heart beat of an individual, rotation of a wheel of a bicycle or rotation of a pedal of a bicycle, and two antennae for wirelessly transmitting the signals detected by the sensor, in which the two ... 12/21/06 - 20060286946 - Peak to average mitigation A method and transmitter for generating a transmission signal are disclosed in various embodiments. In one step, a first magnitude relationship of a received first plurality of symbols is determined to see if it qualifies for modification. At least one of the first plurality of symbols are modified when the ... 12/21/06 - 20060286945 - Inter-frequency handover for multiple antenna wireless transmit/receive units A method and an apparatus for a Wireless Transmit/receive Unit (WTRU) to perform inter-frequency measurements and inter-frequency soft handover from an originating Base Station (BS) operating at a first frequency to a destination BS operating at a second frequency. The WTRU has at least two antennas, where each antenna initially ... 11/30/06 - 20060270364 - Wireless packet transmitting device and method using a plurality of antennas A wireless transmitting device for use in communication with a wireless receiving device with a wireless packet, includes a plurality of antennas, and a signal generator to generate a signal for the wireless packet, which includes an AGC preamble sequence and data using a plurality of subcarriers. A value at ... 11/30/06 - 20060270363 - Method and apparatus for implementing cooperative diversity using partial channel knowledge Partial channel information is used to weight signals being transmitted by cooperating nodes within a cooperative diversity arrangement. In at least one embodiment, the phase of the complex conjugate of a channel coefficient between a cooperating node and a remote device is used to weight a transmit signal. ... 11/23/06 - 20060264184 - Method and apparatus for selecting a beam combination of multiple-input multiple-output antennas A method and apparatus for selecting a beam combination of multiple-input multiple-output (MIMO) antennas are disclosed. A wireless transmit/receive unit (WTRUs) includes a plurality of antennas to generate a plurality of beams for supporting MIMO. At least one antenna is configured to generate multiple beams, such that various beam combinations ... 11/23/06 - 20060264183 - Method of phase sweep transmit diversity (pstd) and apparatus for providing pstd In the method, a phase of at least one signal transmitted from a transmit antenna of a base station is shifted based on a sweeping frequency having a differentiating component. ... 11/16/06 - 20060258304 - Apparatus and method for dynamic diversity based upon receiver-side assessment of link quality An apparatus for dynamic diversity signal reception based upon receiver-side link quality assessments includes two or more antennae. At least one switch is connected to the two or more antennae. A dynamic diversity controller is connected to the at least one switch. The dynamic diversity controller includes a link quality ... 11/16/06 - 20060258303 - Radio communication apparatus, transmitter apparatus, receiver apparatus and radio communication system A channel dividing unit of a transmitter divides a transmission signal into a plurality of channels based on channel structure information indicating a method of structuring an MIMO informed from a receiver. An STC unit realizes transmission diversity according to STC processing for each of the channels divided. A channel ... 11/09/06 - 20060252386 - Methods and apparatus for backwards compatible communication in a multiple input multiple output communication system with lower order receivers A method and apparatus are disclosed for transmitting symbols in a multiple antenna wireless communication system, such that the symbols can be interpreted by a lower order receiver (i.e., a receiver having a fewer number of antennas than the transmitter). For example, subcarriers from one or more symbols can be ... 11/02/06 - 20060246854 - Transmitting and receiving method, and radio apparatus utilizing the same A processing unit transmits, from at least one of a plurality of antennas, data corresponding respectively to the plurality of antennas. A control unit generates request signals with which to let a second radio apparatus supply information on rates at the second radio apparatus. When transmitting the request signal, the ... 11/02/06 - 20060246853 - Transmitting and receiving method, and radio apparatus utilizing the same A processing unit transmits, from at least one of a plurality of antennas, data corresponding respectively to the plurality of antennas. A control unit generates request signals with which to let a second radio apparatus supply information on rates at the second radio apparatus. When transmitting the request signal, the ... 11/02/06 - 20060246852 - Transmitting and receiving method, and radio apparatus utilizing the same A processing unit transmits, from at least one of a plurality of antennas, data corresponding respectively to the plurality of antennas. A control unit generates request signals with which to let a second radio apparatus supply information on rates at the second radio apparatus. When transmitting the request signal, the ... 10/05/06 - 20060223460 - Techniques to enhance diversity for a wireless system A system, apparatus, method and article to manage diversity for a wireless multicarrier communication system are described. An apparatus may include a diversity agent to couple to a transmitter, the diversity agent to convert a determined number of input bits into symbols, interleave the symbols across multiple spatial streams, and ... 09/14/06 - 20060205368 - Selecting an optimal antenna according to an operating state of a device A device (100) has a housing assembly having a plurality of housing portions which can shift relative to each other, a plurality of antennas (102) distributed among the plurality of housing portions, a receiver (104A) coupled to the plurality of antennas for receiving signals carrying information from a source, and ... 08/24/06 - 20060189280 - Pattern diversity to support a mimo communications system and associated methods A MIMO communications system includes a transmitter, and a receiver synchronized with the transmitter. The transmitter changes the power levels for each layered space data stream on a time slotted basis. The data streams arrive at the receiver with various power levels, which provides suitable differences in the received signals ... 08/24/06 - 20060189279 - Radio transmitting apparatus and radio transmission method A radio transmitting apparatus that has a plurality of antennas and changes the number of modulated signals transmitted simultaneously according to the propagation environment and so forth. A transmission power changing section 12 of a radio transmitting apparatus of the present invention adjusts the pilot symbol signal level so as ... 08/17/06 - 20060183439 - Method and system for diversity processing including using dedicated pilot method for closed loop Methods and systems for diversity processing including using dedicated pilot method for closed loop may include combining a plurality of received WCDMA/HSDPA multipath signals for each diversity transmit antenna to at least one processed diversity signal. The received WCDMA/HSDPA multipath signals may originate from diversity transmit antennas at a base ... 08/17/06 - 20060183438 - Communication system, base station, radio network controller, and transmission power controlling method A communication system causes a base station to transmit a downlink control signal to a mobile station through a downlink control channel, and causes the base station to transmit a downlink data signal to the mobile station through a downlink data channel. The communication system includes a diversity judging unit ... 08/17/06 - 20060183437 - Circuit arrangement for a mobile radio device The invention relates to a circuit arrangement for a mobile radio device comprising a power divider (1) for dividing a high-frequency transmit signal over at least two antennas (2,3( spatially arranged mutually apart and comprising at least one phase shifter (4) connected between one of the antennas (2, 3) and ... 08/03/06 - 20060172712 - Control system and method for diversity antenna system A control system and method for controlling switching between and among multiple antennas in a diversity antenna system comprising a radio head unit associated with a radio receiver; two or more antennas, either located in separate antenna modules or co-located in the same antenna module; a switch circuit; and a ... 08/03/06 - 20060172711 - Multi-access system and method using multi-sectored antenna A wireless access point is equipped with both an omnidirectional antenna and a directable antenna that can be selectively directed to any of a plurality of directional spaces overlapping the network space served by the omnidirectional antenna. The directable antenna is directed to an optimal directional space for a client ... 08/03/06 - 20060172710 - Phase sweeping methods for transmit diversity and diversity combining in bts sector extension and in wireless repeaters Apparatus for inserting transmit diversity into an RF signal for transmission, comprises: an RF splitter for splitting the RF signal to be transmitted into two signal parts, and a non-linear phase modulator which applies a non-linear phase modulation to one of the two signal parts, thereby to provide transmit diversity ... 07/27/06 - 20060166628 - Dynamic antenna allocation system A communication system which manages an antenna array by a software-implemented control system that has prior knowledge of the potential interactions among Communications/Navigation and Identification modules. When any transmission/reception combination from a particular antenna is predicted to result in interference with another particular antenna by the interference matrix, then the ... 07/20/06 - 20060160495 - Dual payload and adaptive modulation A wireless broadband communications system that provides higher performance and increased spectral efficiency in point-to-point and point-to-multipoint applications. The wireless communications system includes a plurality of transceivers and a plurality of transmit and receive antennas. The system can be configured as a 1:n SIMO system that transmits and receives signals ... 07/13/06 - 20060154621 - Method for transmitting signals in a radio communication system Signals from a transmitting first radio station are transmitted to a receiving second radio station via at least two intermediate stations. Signaling of the configuration of the emission to the receiving second radio station is carried out between the at least two intermediate stations. ... 07/06/06 - 20060148427 - Communication system and method using transmit diversity Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is disclosed. In a receiving station received transmission signals are processed and a feedback signal to be transmitted to a transmitting ... 06/29/06 - 20060141951 - Transmission diversity systems A time-varying transformation is used to correlate the magnitude of the interference between multiple antenna paths. Embodiments incorporating the time-varying transformations provide transmit diversity gains to remote stations that are not configured for transmit diversity reception. In addition, some of the embodiments can be further configured to balance the load ... 06/29/06 - 20060141950 - Method and apparatus for controlling mimo system using single serial programming interface A method and apparatus for controlling a multi-input multi-output (MIMO) radio frequency (RF) transceiver having a plurality of RF blocks using a single serial programming interface (SPI) are provided. The MIMO system includes: a MIMO transceiver, having one or more input and output units and a serial interface conversion unit ... 06/29/06 - 20060141949 - Method and apparatus to increase the diversity order for a multi-carrier fdm system A transmitter operates to increase a diversity order of a multi-carrier frequency division multiplex (MC-FDM) system. The transmitter has at least two transmit antennas and circuitry to provide at least two of the MC system frequency sub-carriers to different ones of the at least two transmit antennas. ... 06/15/06 - 20060128323 - Multi-carrier communication apparatus In a multi-carrier communication apparatus, it is an object of the invention to increase the amount of data per unit time greatly with the band width kept unchanged. A modulator (102) sequentially performs primary modulation of data (101) which are first transmitted data on the basis of, for example, QPSK ... 05/25/06 - 20060111055 - Communication system A communications system comprises two groups of antennas with a plurality of antennas in each group arranged such that in use signals transmitted from all of the antennas 1 in one group are received by all of the antennas 2 in the second group, and processing means 5 to decode ... 05/25/06 - 20060111054 - Method and system for selecting transmit antennas to reduce antenna correlation A method and system is disclosed for transmitting data over at least one transmit antenna to reduce antenna correlation in wireless communication systems. The transmit antennas are comprised of randomly selected antenna elements wherein the antenna elements are randomly selected from antenna elements of a plurality of antennas of a ... 05/11/06 - 20060099915 - Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. ... 04/20/06 - 20060084395 - Method of controlling a plurality of internal antennas in a mobile communication device By using multiple antennas in a diversity arrangement, a mobile communication device is operable to automatically optimize the best antenna or antenna combination in reaction to the device's immediate environment. The individual antenna designs can be optimized to provide high antenna system efficiency for a number of likely device environments. ... 03/16/06 - 20060057975 - Antenna diversity system and method for operating said system The invention relates to an antenna diversity comprising a first and a second antenna element where the first antenna element is operated in an active mode whereas the second antenna element is operated in a parasitic mode. The present invention minimizes the amount of mismatch while still being able to ... 03/09/06 - 20060052066 - Wireless repeater using a single rf chain for use in a tdd wireless network A repeater for re-transmitting an incoming RF signal comprising: a first antenna array for receiving the incoming RF signal; a second antenna array for transmitting an outgoing RF signal; and a transceiver for down-converting the incoming RF signal to a down-converted signal, processing the down-converted signal, and up-converting the processed ... 03/09/06 - 20060052065 - Transmit diversity fo base stations A method and corresponding upgrade kit, for enhancing a base station (10) having a CDMA air interface and a passive antenna (12) with receive space diversity capability so as to provide the base station with transmit diversity capability. The method comprises attaching a radio frequency interface unit to an R.F. ... 02/23/06 - 20060040622 - Mobile wireless communications device with polarization diversity wireless local area network (lan) antenna and related methods A mobile wireless LAN communications device may include a portable, handheld housing, and a wireless LAN transceiver carried by the housing. A polarization diversity wireless LAN antenna may be included for cooperating with the wireless LAN transceiver to communicate over a wireless LAN. The polarization diversity wireless LAN antenna may ... 02/16/06 - 20060035605 - Method and apparatus for reducing antenna correlation The present invention is related to a method and apparatus for reducing antenna correlation between multiple antennas. A transmitter generates at least two beams with a plurality of antennas. The generated beams are spatially separated to point away each other. Therefore, the transmitted signals travel through different channel conditions and ... 02/09/06 - 20060030280 - Transmit system employing an antenna and balanced amplifier architecture which provides power amplifier load balancing independent of single or dual signal operation of the transmitter A transmit system is disclosed herein that includes two receive inputs for receiving input power distributed between two weakly correlated signals. The transmit system further includes a balanced amplifier system for dividing, amplifying, and recombining the two weakly correlated signals and a two antenna array having a first antenna element ... 02/09/06 - 20060030279 - Non-simultaneous frequency diversity in radio communication systems A radio using non-simultaneous frequency diversity includes: an antenna, a radio frequency module coupled to the antenna such that the radio frequency module is operable to transmit or receive radio frequency signals using the antenna, and a baseband module coupled to the radio frequency module. The baseband module is operable ... 01/12/06 - 20060009168 - Method for controlling transmissions using both diversity and nondiversity transmission schemes A wireless communications system is provided in which transmissions may be made in either a diversity mode or a non-diversity mode on a slot by slot basis. When transmitting in the diversity mode, separate pilot signals are delivered over a first and second antenna. When transmitting in the non-diversity mode, ... 01/05/06 - 20060003710 - Transmitter apparatus and radio communication method A radio station equipped with an array antenna, when transmitting an information symbol sequence to a particular radio station, uses a plurality of vectors, which are produced based on a propagation channel characteristic established between these radio stations, to simultaneously transmit a plurality of symbol sequences, which include the information ... 12/29/05 - 20050287962 - Rf-based antenna selection in mimo systems A method is presented for processing signals of a multiple-input, multiple-output communications system in the RF domain. The system includes multiple transmit antennas and multiple receive antennas connected by a wireless channel. A matrix M is generated based on long-term characteristics of the wireless channel. The matrix M is multiplied ... 12/08/05 - 20050272382 - Wireless communication apparatus In a wireless communication apparatus which is provided with three transmission systems each including therein a transmission power amplifier for amplifying a signal received and a transmitting antenna for transmitting the amplified signal and which is applicable to an MIMO transmission method for simultaneously transmitting three units of data having ... 12/01/05 - 20050266808 - Method and system for interference detection A wireless communications device includes a first receiver and a second receiver. The first receiver is configured to receive a first wireless signal (such as a Bluetooth or WLAN signal), while the second receiver is configured to receive a second wireless signal (such as a UWB signal). In addition, the ... 11/24/05 - 20050260954 - Transmission diversity with two cross-polarised antennas arrays The present invention concerns a method for selecting a diversity mode (A, B, C) to be applied by a transmitter having two cross-polarized antenna arrays (Ant1, Ant 2), each representing a diversity branch, comprising the steps of: providing (S10) a plurality of diversity mode performance chart look-up tables (LUT, LUT1, ... 11/10/05 - 20050250457 - Radio diagnostic tool combining signal quality and signal strength measurement A measure is derived of the potential alignment of radio antennas associated with wireless transceivers, that are interfaced with terrestrial communication links transporting digital communication signals between geographically spaced apart transceiver sites. At a first radio site, a received signal strength indication is derived for signals sourced from a second ... 11/03/05 - 20050245207 - Wireless communication terminal and antenna switching control method A wireless communication terminal able to change a resonance frequency of a sub antenna, able to reduce interference to a main antenna, and able to suppress deterioration performance in a dual terminal compatible with a plurality of transmission systems, wherein, in a wireless communication unit, at the time of a ... 11/03/05 - 20050245206 - Method to enable open loop antenna transmit diversity on channels having dedicated pilots The use of the STTD is enabled in a network so that the common channels (CPICH etc.) do not need to be transmitted using transmit diversity, but the STTD can be enabled only for channels having dedicated pilots and which are intended for the UEs supporting this functionality. Other UEs ... 10/27/05 - 20050239419 - Array-antenna-equipped communication apparatus and method of calibrating array-antenna-equipped communication apparatus In an array-antenna-equipped communication apparatus, a part of a transmission signal after passing through a radio wave transmitter is branched by a directional coupler, combined by a combiner, converted to a baseband signal by a receiver for calibration, analog-converted by an analog-to-digital converter, and input to an adaptive controller as ... 10/20/05 - 20050233709 - Modified preamble structure for ieee 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, mimo or otherwise extended devices A modified preamble is used by extended devices that operate at higher rates, MIMO or other extensions relative to strict 802.11a-compliant devices. The extended devices might use multiple antenna techniques (MIMO), where multiple data streams are multiplexed spatially and/or multi-channel techniques, where an extended transmitter transmits using more than one ... 09/01/05 - 20050191973 - High-frequency circuit device A high-frequency circuit device is provided that achieves cost reduction and reduction in power consumption and does not require an additional high-frequency amplifier even when a transmission frequency band is newly added. The high-frequency circuit device has a configuration including a transmission amplifier circuit for transmitting high-frequency power from an ... 08/11/05 - 20050176385 - Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system Measurements for handoff are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-directional beam. The WTRU measures signals from a plurality of cells with ... 07/28/05 - 20050164655 - Method and apparatus for transmitting signals, method and apparatus for receiving the signals, and communication system utilizing the same A data separating unit separates data to be transmitted into the number of data equal to that of antennas. An error correcting unit performs a coding for error correction on data. An interleave unit interleaves data after the convolutional coding. A preamble adding unit adds an STS to the head ... 07/21/05 - 20050159115 - Apparatus and associated methods to perform space-frequency interleaving in a multicarrier wireless communication channel An apparatus and associated methods for performing space-frequency interleaving in a multicarrier wireless communication system is generally described. ... 07/07/05 - 20050148306 - Predictive method and apparatus for antenna selection in a wireless communication system A predictive method and apparatus are disclosed for selecting an antenna to use in a multi-antenna wireless device. A predictive antenna selector predicts the best antenna (for both receiving and transmitting signals) based on the signal quality of the antenna for prior received frames. The quality of each antenna is ... 06/30/05 - 20050143024 - Dual antenna diversity transmitter and system with improved power amplifier efficiency Provided is a dual antenna diversity transmitter and system having improved power amplifier efficiency, and further comprising switches in the dual antenna diversity transmitter and system, to minimize a DC input power consumed by the power amplifier depending on the required transmitting output power and operate efficiently the power amplifier, ... 06/30/05 - 20050143023 - Front-end module for multi-band and multi-mode wireless network system A front-end module for multi-band and multi-mode wireless network system is disclosed. The front-end module includes a diversity switch, two channel-separating devices, a plurality of band pass filters, a plurality of baluns, and a plurality of low pass filters. The number of the band pass filters, the number of the ... 06/23/05 - 20050136857 - Adaptive antenna apparatus provided with a plurality of pairs of bidirectional antennas An adaptive antenna apparatus is provided with a total of four or more, even number N of antennas including a plurality of pairs of antennas each having a bidirectional characteristic. The N antennas are provided respectively at vertexes of a polygon of the same number as the number N of ... 06/23/05 - 20050136856 - Diverse antenna system An improved antenna diversity system is provided. The antenna diversity system has at least two spaced-apart antennas, with each antenna providing a respective antenna signal. The signal(s) may be processed and scaled according to its respective power level. The phase difference is determined between the signals, and the phase difference ... 06/16/05 - 20050130606 - System and method for providing a smart antenna A smart external antenna module is proposed for wireless systems. The module allows the advantages of smart antennas to be easily added to existing wireless systems without any modification to the transceiver. Specifically, the smart antenna module weights and combines the signals received by multiple antennas to improve the received ... ### FreshPatents.com Support |