Patent
System and method for generating signal waveforms in a CDMA cellular telephone system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Lindsay A. Weaver,Wheatley Charles E,Andrew J. Viterbi +5 more
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TLDR
In this paper, a system and method for communicating information signals using spread spectrum communication techniques is presented, where PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance.Abstract:
A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined. Information communicated on the mobile-to-cell link channels are, in general, encoded, interleaved, orthogonal signaling along with QPSK spreading.read more
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Patent
Method and apparatus for power estimation in an orthogonal coded communication system
TL;DR: In this paper, a method and apparatus for estimating signal power is provided, which is accomplished by correlating an input data vector with a set of mutually orthogonal codes to generate output values.
Patent
Method and apparatus for adaptive transmission control in a high data rate communication system
Rashid Ahmed Akbar Attar,Roberto Padovani,Black Peter J,Nagabhushana T. Sindhushayana,Eduardo A. S. Esteves,Mehmet Gurelli +5 more
TL;DR: In this paper, a method and apparatus for improved throughput while transmitting data packets within multiple time slots was proposed for high data rate communication system, where a subscriber station sends a stop-repeat signal to a base station, causing the base station to cease further transmissions of the packet.
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Apparatus and method for transmitting and receiving a RACH signal in SC-FDMA system
Sung Lark Kwon,Dong Joo Neuti Maeul Jugong Park,Hyuck Chan Kwon,Young Kwon Ryu,Hoo Young Neuti Maeul Jugong Jeong,Hong Jik Kim,Jung Seung Lee,Jae Won Jang,Byoung Seong Park,Hee Gul Park +9 more
TL;DR: In this paper, a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system is presented. But the RACH signal may include a short message including information related to a mobile station, which can be detected in a frequency based method, a time based method or a sliding matched filter based method.
Patent
GPS synchronization of CTS transmitters for an interactive network
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References
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Book
Advanced Engineering Mathematics
TL;DR: This book discusses ODEs, Partial Differential Equations, Fourier Series, Integrals, and Transforms, and Numerics for ODE's and PDE's, as well as numerical analysis and potential theory, and more.
Patent
Spread spectrum multiple access communication using satellite or terrestrial repeaters
TL;DR: In this article, a multiple access, spread spectrum communication system and method for providing high capacity communications to, from, or between a plurality of system users, using code-division-spread-spectrum communication signals is presented.
Journal ArticleDOI
Nonlinear estimation of PSK-modulated carrier phase with application to burst digital transmission
TL;DR: A class of nonlinear estimation algorithms is described to estimate the unknown phase of a carrier which is fully modulated by m -ary PSK modulation, and the effect of quantization and finite read-only-memory implementation of the nonlinearity are determined by computer simulation.