Patent
Digital encoder-decoder
Daniel J. Coombes,Martin V. Seitz +1 more
- 07 Dec 1979
83
TL;DR: In this article, a digital encoding and decoding system suited for use in a mobile trunked dispatch communication system capable of error correction, error detection, and detection of loss of synchronization is presented.
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Abstract: A digital encoding and decoding system suited for use in a mobile trunked dispatch communication system capable of error correction, error detection, and detection of loss of synchronization. The encoder comprises a cyclic block encoder, an autosynchronization sequence combiner, a convolutional encoder, and a bit interleaver to encode information to be transmitted. The decoder comprises a bit de-interleaver, a convolutional decoder, an autosynchronization sequence combiner, and a cyclical block decoder to recover the transmitted information and also indicates whether any errors are present in the recovered information.
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Citations
Patent
Watch pager system and communication protocol
Garold B. Gaskill,Daniel J. Park,Robert G Rullman,Donald T Rose,Joseph F Stiley,Lewis W Barnum,Don G. Hoff +6 more
- 27 Nov 1985
TL;DR: A wide area paging system is disclosed in this paper in which paging messages input to the system in one local area can be broadcast to a receiver in any other local area without necessarily broadcasting the message in all areas.
326
Patent
Cellular voice and data radiotelephone system
Labedz Gerald P,Jeffery D Bonta,Dennis R. Schaeffer,Daniel F. Tell,Lev Valy +4 more
- 09 Jul 1985
TL;DR: In this paper, a data message transmission system for a cellular radiotelephone system provides protection against data loss caused by multipath fade and subscriber unit handoff by halting the data transmission prior to handoff and resuming data transmission after handoff.
232
Patent
Dynamic regrouping in a trunked radio communications systems
Jeffrey S. Childress,David L. Hattey +1 more
- 13 Oct 1993
TL;DR: In this paper, a dynamic regrouping scheme for trunked radio frequency communications system is proposed, which includes an effective user interface, automatic support of multi-site systems, the capability to program individual radio transceivers with multiple new groups dynamically, a fast rate of reconfiguration, instantaneous switch over to prevent radios from residing in immature groups, and a satisfactory mode of operation should the site controller (or site controllers in non-fault tolerant systems) fail.
149
Patent
Apparatus and method for transmitting digital data over a radio communications channel
Jeffrey Scott Childress,Nancy L. Hall,Houston Howard Hughes +2 more
- 03 Jun 1987
TL;DR: In this paper, a digital radio RF signalling protocol communicates either digitized voice or digital data signals and indicates the type of information being communicated to the receiver, and multiple repeats of control signals are provided for face protection and to ensure correct receipt even under adverse communications channel conditions.
145
Patent
Method and system for adaptive interleaving
Thomas Starr
- 14 Nov 2005
TL;DR: In this article, a method for automatically controlling an adaptive interleaver involves monitoring performance parameters of a transmission system and controlling the adaptive interleave in response to the performance parameters The SNR and the data rate of the transmission system are preferably determined.
141
References
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W. W. Peterson,D. T. Brown +1 more
- 01 Jan 1961
TL;DR: The potentialities of these codes for error detection and the equipment required for implementing error detection systems using cyclic codes are described in detail.
583
Patent
Data communication system with random and burst error protection and correction
Stephen M. Bench,William R. Dirkes,Manohar A. Joglekar,James C. Secora,Michael A. Stepien +4 more
- 06 Sep 1977
TL;DR: In this article, a data communication system for use in the control and monitoring of mobile stations, for example, in a bus monitoring system, from a central station over a communication channel carrying both data and voice information is described.
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Patent
Space communication system for compressed data with a concatenated Reed-Solomon-Viterbi coding channel
Robert F. Rice,Edward E. Hilbert +1 more
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TL;DR: In this paper, a space communication system incorporating a concatenated Reed Solomon Viterbi coding channel is disclosed for transmitting compressed and uncompressed data from a spacecraft to a data processing center on Earth.
Patent
Encoding for error correction of recorded digital signals
Doi Toshitada,Kazami Shinichi +1 more
- 15 Dec 1977
TL;DR: In this paper, the error-correcting bits are added to the original bits in intersecting sets in row-by-column relationship, and parity bits can also be formed simultaneously with the formation of the error correcting bits as extensions of the intersectioning sets.
54
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