Patent
Method of searching for a bursty signal
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TLDR
An integrated search processor used in a modem for a spread spectrum communications system buffers receives samples and utilizes a time sliced transform processor operating on successive offsets from the buffer as discussed by the authors, which autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search, and the number of Walsh symbols to accumulate results at each offset.Abstract:
An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment The search is done in a linear fashion independent of the probability that a signal being searched for was transmitted at any given timeread more
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Method and apparatus for high-rate packet data transmission
Roberto Padovani,Bender Paul E,Peter J. Black,Matthew S. Grob,Hinderling Jurg K,Nagabhushana T. Sindhushayana,Wheatley Charles E +6 more
TL;DR: In this article, the data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packet, which results in retransmission of the received in error.
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TL;DR: In this article, a MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility, which may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a multi-user non-steered mode that transmissions from multiple antennas to multiple receivers without spatial processing at a transmitter, and (3) a multiuser steered and non-stacked mode that simultaneously transmits data streams from multiple receivers to multiple users.
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Adaptive Communications Methods for Multiple User Packet Radio Wireless Networks
TL;DR: In this article, an adaptive receiver system for a remote unit in a communication network rapidly adapts optimal weights for reproducing a signal transmitted to it by a specific base unit in the network.
References
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Patent
Diversity receiver in a cdma cellular telephone system
TL;DR: In this paper, a spread spectrum receiver subsystem for utilization in a CDMA cellular telephone having a searcher receiver (44) for scanning the time domain so as to use the PN processing gain and time discrimination properties of spread spectrum coding to determine the location and received signal strength of multiple receptions of a pilot signal traveling upon one or more physical propagation paths to reception.
Patent
Integrated cellular communications system
TL;DR: In this article, a CDMA spread spectrum cellular communications system with both surface and satellite nodes and using forward error correction coding, to enhance effective gain and selectivity, is provided.
Patent
Demodulation element assignment in a system capable of receiving multiple signals
TL;DR: In this article, a receiver having a plurality of demodulation elements (204A, 204B, 204C) is considered, and the number of reassignments is controlled so that excessive data is not lost during the reassignment process.
Patent
Cell site demodulation architecture for a spread spectrum multiple access communication systems
TL;DR: An integrated demodulation processor used in a modem for a spread spectrum communications system despreads multipath receive signals then uses a time sliced transform processor to process the multiple signals in to a single series of soft decision results.
Patent
Multipath search processor for a spread spectrum multiple access communication system
TL;DR: In this article, an integrated search processor (128) is used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer.