Multiplex communications – Wide area network – Packet switching
Patent
1986-10-27
1988-10-18
Griffin, Robert L.
Multiplex communications
Wide area network
Packet switching
370 18, 370 19, 34082564, 34082576, 455608, H04J 324, G08C 1900, H04B 900
Patent
active
047792655
ABSTRACT:
Methodology, and associated circuitry, for encoding and decoding signals utilize bistate orthogonal code techniques that effect autonomy of communications and simplified signal processing, thereby improving reliability.
Encoder (121) processes an incoming data stream by associating a bistate orthogonal code with each binary one in the input stream and then by transmitting a series of rate-increased pulses over a path during intervals determined by the code for each of the binary ones.
Decoder (131), in synchronism with encoder (121), is generally arranged as a correlation detector in that the decoder only responds to the particular bistate orthogonal code for which it is configured. Sensors in energy transfer relation to the path are positioned at detection points on the path in correspondence to an assigned code. The outputs of the sensors are processed to produce a rate-decreased detected signal at the rate of the input stream whenever a rate-increased stream corresponding to the decoder configuration is propagating along the path.
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"Coding and Decoding for Code Division Multiple User Communication Systems", IEEE Transactions on Communications, vol. COM-33, No. 4, Apr. 1985, pp. 310-316, T. J. Healy.
Kerner Martin
O'Connor Mary G.
Salehi Jawad A.
Bell Communications Research Inc.
Falk James W.
Griffin Robert L.
Peoples John T.
Telesz Jr. Andrew J.
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