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
Simulation driven wireless LAN planning
Allan Thomson,Sudhir Srinivas +1 more
TL;DR: In this article, the authors describe the methods and apparatuses of planning a wireless local area network (WLAN) network and present the features of the WLAN access points based on such data.
Patent
Orthogonal code division multiple access communication system having multicarrier modulation
TL;DR: In this paper, an orthogonal code division multiple access (OCDMA) communication system with multicarrier modulation is presented. But the system does not provide robust delay lock loop (DLL) code tracking.
Patent
Interleaver and deinterleaver for use in a diversity transmission communication system
Lundby Stein S,Saints Keith +1 more
TL;DR: In this paper, the performance of a system utilizing interleaving and transmit diversity by reordering the sequence of symbols transmitted along the different transmission channels is enhanced by providing different shuffling functions in conjunction with the interleavers and deinterleavers used with different transmit channels, which decreases the probability of loss of sequential symbols when transmission channels or antennas become correlated.
Patent
System and method for automatic configuration of remote network switch and connected access point devices
TL;DR: In this paper, the authors present a method for self-initiating and configuring one, a plurality, or hundreds of wired or wireless network devices on a network, without the participation of a person having knowledge of networks or network devices at the facility.
Patent
Methods and systems for steganographic processing
TL;DR: In this article, the authors utilize steganographic embedding to help facilitate tracing of unauthorized copies to a location and particular time, where the binary information enables an unauthorized version of the communicated audio or video to be traced back to the location and time.
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.