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Pulse Or Digital Communications > Spread Spectrum > Direct Sequence Direct SequenceDirect Sequence 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.11/08/07 - 20070258508 - Method and apparatus for wireless communication in a mesh network A method and apparatus for communication in a wireless sensor network. In one embodiment, one or more routers in a network may be available for communication with one or more star nodes at a randomized time and/or frequency. A connectivity assessment, which may be performed at several different frequencies and/or ... 07/26/07 - 20070171960 - Apparatus and methods for implementing a split equalizer filter for sparse channels The invention concerns methods and apparatus for performing channel equalization in a direct-sequence spread spectrum communications system. The methods and apparatus of the present invention are particularly applicable in situations where communication occurs over a channel experiencing multipath interference associated with paths having significantly different lengths. The impulse response-delay profile ... 07/05/07 - 20070153876 - Method and apparatus for providing addressing to support multiple access in a wireless communication system An approach is provided for signaling in multi-carrier system. Communication information that enables communication over a communication network is received. The communication information is mapped to a sequence among a plurality of sequences having a predetermined correlation property to output a communication information sequence. ... 03/08/07 - 20070053413 - Method and apparatus for optimizing radio frequency commucation A method for radio frequency communication includes activating a button of a wireless device; the wireless device detecting a data error rate of each of a plurality of radio frequency channels according to a first predetermined parameter; the wireless device comparing the data error rate of each of the plurality ... 06/22/06 - 20060133454 - Wide band interoperable peer to peer wireless systems Intersil HFA processors are used to form peer to peer communications between IEDs in an electric power substation as well as between any IED and a substation access port. IEDs are identified by an 9 bit station identification code for up to 255 IED and a final 9 bit code ... 04/13/06 - 20060078040 - Apparatus and method for cell acquisition and downlink synchronization acquisition in a wireless communication system An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values ... 03/23/06 - 20060062281 - Adaptive weight update method and system for a discrete multitone spread spectrum communications system A new method makes the most efficient use of the scarce spectral bandwidth in a wireless discrete multitone spread spectrum communications system by updating the spectral and/or spatial spreading weights at a rate that is determined by the measured quality of the link. Low quality links require more frequent updates ... 12/15/05 - 20050276311 - Mt-cdma using spreading codes with interference-free windows The invention relates to digital transmission. It particularly relates to a method of transmitting data using multi-carrier Code-division Multiple Access (CDMA) for accessing a transmission system. The method comprises a step of modulating the data to be transmitted using Orthogonal Frequency-division Multiplexing (OFDM) for producing OFDM modulated data symbols and ... 10/20/05 - 20050232337 - Method of selecting pn codes for reducing interference between users A method for reducing interference between users in an MCR (Multiple Chip Rate) direct-sequence CDMA (Code Division Multiple Access) system. The method includes classifying a chip transmission rate for each user in a cell of the MCR direct-sequence CDMA system, and selecting the PN codes having a predetermined rate, which ... 08/25/05 - 20050185698 - Spread spectrum acquisition To receive a spread spectrum signal without access to the timing information of the transmitter, it is necessary to synchronise timing at the receiver. Assuming each symbol is represented by n chips, synchronisation is done using a search algorithm that receives n−1 chips and determines whether k1 of those chips ... ### FreshPatents.com Support |