Patent
Orthogonal spread spectrum time division multiple accessing mobile subscriber access system
Reads0
Chats0
TLDR
In this article, a time division multiple access mobile communications system employing frency division multiplexing and perfect noise codes to enable utilization of the system is described, where a central node or repeater is employed, with all transmissions to it being performed at a first frequency, and with the frequency division multiple-xing being such that all re-transmissions from the central node are performed at another, different frequency.Abstract:
A time division multiple access mobile communications system employing frency division multiplexing and perfect noise codes to enable utilization of the system. A central node, or repeater, is employed, with all transmissions to it being performed at a first frequency, and with the frequency division multiplexing being such that all re-transmissions from the central node are performed at a second, different frequency. The noise codes employed are of a type termed code mates having correlation functions which upon detection provide an impulse autocorrelation function. The described arrangement enables random access, or direct call-up, to be accomplished with total non-interference between users. Large improvements in signal-to-noise power ratio and in signal-to-jamming power ratio will be seen to result.read more
Citations
More filters
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
TL;DR: 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.
Patent
Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
TL;DR: In this article, a system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality OF frequencies using repetitive time frames, each said time frame comprising a sequence of time slots.
Patent
Multi-band, multi-mode spread-spectrum communication system
TL;DR: In this article, a technique for spread-spectrum communication which uses more than one mode and multiple frequency bands is presented. But the frequency band onto which spread-Spectrum signals are encoded may be changed upon a change in environment or other control trigger, such as establishment or de-establishment of communication with a private access network.
Patent
Method and apparatus for forward link rate scheduling
TL;DR: In this article, the scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication in a communication system capable of variable rate transmission, each remote station is assigned one primary code channel for the duration of the communication with a cell.
Patent
Enhanced mobility and address resolution in a wireless premises based network
Ronald L. Mahany,Steven E. Koenck,Alan G. Bunte,Robert C. Meier,Phillip Miller,Roger L. Wolf,George E. Hanson,Ronald E. Luse,Guy J. West,Charles D. Gollnick,Keith K. Cargin,Steven H. Salvay,Arvin D. Danielson +12 more
TL;DR: In this paper, a mobile customer service station operating within a wireless multi-hop communication network includes a console on a wheeled chassis, which carries and houses a number of components which are used in merchandising operations to conclude customer purchase transactions.
References
More filters
Proceedings ArticleDOI
Processor for Multiple, Continuous, Spread Spectrum Signals
Charles Ward,Paul C. Wang +1 more
TL;DR: A circuit is described which accepts the linear sum of several continuous (CW) direct sequence, spread spectrum signals, and outputs a sequence of narrow pulses, each of which contains all the available energy of one of the input signals over some longer predetermined interval of time.
Patent
Switching circuits employing orthogonal and quasi-orthogonal pseudo-random code sequences
TL;DR: In this paper, a pseudo-random orthogonal or quasiorthogonal code sequence was used to accomplish line to line or line group to line group switching in both a linear and nonlinear mode.
Patent
System for two-way communication between a master station and a plurality of substations via a satellite
TL;DR: In this article, a system for communication between aircraft and a ground control center via a satellite is described, where information is transmitted in bursts from all the aircraft to the ground control centre on a time division multiple access basis in a first radio frequency channel common to all of the aircraft.
Patent
Time division multiple access communications system
TL;DR: In this paper, a time division multiple access (TDMA) system employing perfect noise codes to enable utilization of the system is described. But the codes employed are of the type termed code mates having correlation functions which upon detection provide an impulse autocorrelation function.