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Pulse Or Digital Communications > Spread Spectrum > Frequency Hopping Frequency HoppingFrequency Hopping 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.10/25/07 - 20070248146 - Methods and systems for tone hopping Methods and systems for tone hopping are provided. In one embodiment, a method for an orthogonal frequency division multiplexing (OFDM) multipoint-to-point communications system comprises: establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the ... 10/04/07 - 20070230540 - Frequency hopping spread spectrum scheme for rfid reader A system and method is provided for implementing forced frequency “hops” if the time it takes to perform a particular transaction is greater than the time available on a particular carrier frequency. In one embodiment of the present invention, a radio frequency identification (RFID) base station processor (in conjunction with ... 09/06/07 - 20070206660 - Radio frequency collision avoidance mechanism in wireless networks using frequency synchronization A novel mechanism for avoiding RF collisions using frequency synchronization techniques. In one embodiment, a solution to the problem comprises dividing the channel map into different channel groups wherein each group includes a minimum number of channels. The composition of the channel groups depends on the number of piconets and ... 08/16/07 - 20070189361 - Rf transceiver using hopping frequency synthesizer A technique of frequency hopping communication capable of high-speed switching of a plurality of signals having ultra-wide band 528 MHz bandwidth at high-speed and setting and switching a band center frequency and the number of bands arbitrary is provided. A radio transceiver has a frequency hopping communication function of UWB ... 08/09/07 - 20070183479 - Method to calibrate rf paths of an fhop adaptive base station A method for calibration of RF paths of a frequency hopping adaptive base transceiver station is provided. The method of calibration calibrates a wireless cellular telecommunication system with a frequency hopping adaptive base transceiver station including an adaptive antenna array with two or more RF traffic transceiver apparatus chains. The ... 07/19/07 - 20070165694 - Method of tone allocation for tone hopping sequences Methods and apparatus for allocating tones for communications purposes in adjoining cells of an OFDM system are described. Tones used in each cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function. Different cells use different tone to tone hopping sequence allocation functions ... 07/12/07 - 20070160115 - Methods and apparatus for flexible hopping in a multiple-access communication network Techniques for efficiently designing random hopping patterns in a communications system are disclosed. The disclosed embodiments provide for methods and systems for generating random hopping patterns, updating the patterns frequently, generating different patterns for different cells/sectors, and generating patterns of nearby sub-carriers for block hopping. ... 03/29/07 - 20070071068 - Encipherment of digital sequences by reversible transposition methods Methods for transposing elements of a sequence according to a rule, wherein the rule is derived from pseudo-noise or pseudo-noise like binary and non-binary sequences are disclosed. Sequences of transposed symbols can be recovered by applying a reversing rule. Sets of orthogonal hopping and transposition rules are created by applying ... 12/21/06 - 20060285579 - Communicating over a wireless network A first device communicates with a wireless network that includes nodes that are active for predefined activation times and that are at least partially dormant when not active. The communication method includes identifying a start of communication via a message that exceeds a maximum activation time of nodes on the ... 11/30/06 - 20060268960 - Apparatus to frequency hop an orthogonal frequency division multiplexing access method using digital signal processing technique Apparatus to frequency hop an orthogonal frequency division multiplexing access method using digital signal processing technique. ... 10/26/06 - 20060239334 - Digital communication method and system This invention is concerned with a transmission control method and apparatus in a collision interval for a collision of multidimensional hopping patterns. In the present invention, each orthogonal wireless resource in the coordinate of the multidimensional orthogonal resource can hop according to the hopping pattern negotiated between a transmitter and ... 10/05/06 - 20060222054 - Dynamic frequency hopping A frequency hopping communications system is disclosed. A server is adapted to have one or more radio head interface modules and a call processing software module. The call processing software module performs modulation and demodulation of voice and data streams using one or more air interface standards. A radio head ... 09/14/06 - 20060203891 - Systems and methods for beamforming and rate control in a multi-input multi-output communication systems Methods and apparatuses are disclosed that determine a type of channel information based upon whether a wireless device is scheduled to receive symbols. In addition, a determination may be as to a number of hop periods to determine the type of channel information. Further, a distance between hop regions may ... 08/24/06 - 20060188004 - Radio communication device and semiconductor integrated circuit device used for the same A semiconductor integrated circuit for a radio communication terminal sequentially uses a plurality of frequency channels by instructions from a hopping frequency decision unit to receive packet data by a reception unit. When the integrated circuit cannot detect the head of the packet data in reception operations, the integrated circuit ... 08/10/06 - 20060176935 - Defective pixel compensation system and display device using the system With respect to a display device having a high-resolution display panel, It makes possible to prevent to deteriorate the display quality by a dot defect . A display panel having a dot defect is identified and coordinates of the defective pixel are determined. The brightnesses of pixels adjacent to the ... 06/08/06 - 20060120435 - Fast frequency-hopping transceiver and method A fast frequency-hopping transceiver comprises a RF-unit arranged on a first chip, a base-band unit on a second chip, a bidirectional operable data and control interface arranged between said first and said second chip having at least one data line for data communication, at least one control line for controlling ... 06/08/06 - 20060120434 - Enhanced optical fast frequency hopping-cdma by means of over spreading and interleaving A method and an optical communication system for a practical implementation of fast frequency hopping-code division multiple access in optical networks allowing higher transmission bandwidth is provided. The method comprises the step a) of providing a fast frequency hopping CDMA coded optical signal comprising a plurality of user's bits of ... 05/18/06 - 20060104333 - Acknowledgment for a time division channel A communication unit (101) and corresponding methods are arranged and constructed to detect acknowledgment messages as an Originator or respond with an acknowledgment message as a Target on a time division channel. The communication unit includes a transceiver (201) configured to support air interfaces (113, 115) with other communication (103, ... 05/11/06 - 20060098715 - Method of detecting interference in a frequency hopping wireless communication system An adaptive frequency hopping wireless communication method in which, upon completion of the transmission of a packet from a transmitting device to a receiving device in a time slot, the transmitting or receiving device (or both) uses the remaining time in the slot, if the amount of remaining time is ... 04/13/06 - 20060078039 - Predictive collision avoidance in macrodiverse wireless networks with frequency hopping using switching A communication system using fast macrodiversity switching (FMS) and frequency hopping (FH) for wireless signals including downlink signals to and uplink signals from mobile stations. Frequency hopping sequences are determined for the uplink and downlink signals for the mobile stations. A plurality of transceiver stations employ broadcast channels and dedicated ... 04/06/06 - 20060072649 - Frequency hopping ofdma method using symbols of comb pattern Method for providing frequency-hopping OFDMA using symbols of comb patter, the method including the steps of: a) assigning frequency domain signal X(k) of comb pattern (comb symbol, k is frequency index) to modulated data sequence, the comb symbol comprising predetermined number of sub carriers (sub carrier group) which are placed ... 03/16/06 - 20060056492 - Wireless communication control method and wireless communication device A wireless communication control method of the present invention for wireless communication devices employing Adaptive Frequency Hopping that switches among a plurality of channels except a channel subject to interference by interference waves in a predetermined frequency band for communication includes steps of creating, setting, processing reception, and assessing channels. ... 01/26/06 - 20060018365 - Method for transmitting a signal using a precise adaptive modulation and coding scheme in a frequency hopping-orthogonal frequency division multiple access communication system A method of transmitting a signal by using an Adaptive Modulation and Coding scheme in a Frequency Hopping-Orthogonal Frequency Division Multiplexing Access communication system capable of dividing total frequency bands into a plurality of sub-carrier bands and including a plurality of sub-channels, which are sets of predetermined sub-carrier bands, and ... 01/19/06 - 20060013285 - Radio communication apparatus, base station and system Radio communication apparatus for receiving OFDM signal from base station and transmitting FH signal to base station, using sub-channels, base station comparing hopping pattern information items indicating hopping patterns from radio communication apparatuses including radio communication apparatus, and generating collision information when hopping patterns include colliding hopping patterns, includes estimation ... 01/05/06 - 20060002451 - Frequency-hopped ifdma communication system Frequency hopping in an IFDMA system takes place by utilizing a time-varying IFDMA modulation code. In particular, a modulator receives a symbol stream and a user specific IFDMA modulation code (bi(t)). The output of the modulator comprises a signal (xi(t)) existing at certain frequencies, or subcarriers. The actual subcarriers that ... 12/22/05 - 20050281317 - Apparatus and method for transmitting and receiving data in a code division multiplexing-frequency hopping-orthogonal frequency division multiple access communication system A system and method for transmitting data by a base station in a multiple access communication system including a plurality of sub-channels, each of which includes a predetermined number of sub-carrier bands, the sub-carrier bands being divided from an entire frequency band. The method includes the steps of: dividing input ... 10/27/05 - 20050238083 - Base station identification in orthongonal frequency division multiplexing based spread spectrum multiple access systems A base station having the strongest downlink signal is identified by utilizing a unique slope of a pilot tone hopping sequence being transmitted by a base station. Specifically, base station identification is realized by determining the slope of the strongest received pilot signal, i.e., the received pilot signal having the ... 10/06/05 - 20050220174 - Multiuser detection aided multiple access differential frequency-hopped spread spectrum Techniques for multiple access differential frequency-hopped spread spectrum (MA-DFHSS) aided by multiuser detection (MUD) are disclosed. An initial DFH decoding is performed to provide data estimates for each user represented in a received co-channel signal. Interference cancellation is then performed using MUD, thereby providing an interference-cancelled signal. Data estimates remaining ... 09/22/05 - 20050207474 - System and method for coherent multi-h continuous phase modulation waveform A system and method improves ECCM and data payload for a multi-h continuous phase modulated waveform with the addition of frequency hopping capabilities. The system and method exploit the short constraint length and rotational invariance of the multi-h CPM waveform to enable frequency hopping using current system capabilities. The transmitted ... 07/28/05 - 20050163194 - Interference estimation in a wireless communication system Interference may be controlled by selectively blanking or attenuating transmit powers. A method of estimating interference caused by a transmitting entity in a wireless communication system comprises determining a desired level of accuracy in an interference estimate, determining a required number of blanks per subband set to achieve the desired ... ### FreshPatents.com Support |