Pulse or digital communications – Repeaters – Testing
Patent
1992-03-17
1993-06-08
Barron, Jr., Gilberto
Pulse or digital communications
Repeaters
Testing
375113, 375115, H04L 2732, H04L 706
Patent
active
052186202
ABSTRACT:
In a spread spectrum communication system for communicating data by spreading spectrum thereof, using PN codes, on the transmitter side, a first modulated output portion, which is spread-spectrum-modulated, containing no data to be transmitted and a second modulated output portion, which is spread-spectrum-modulated, following the first modulated output portion and containing data to be transmitted are generated; and the second modulated output portion is transmitted with a low electric power and the first modulated output portion with a high electric power. On the receiver side, a correlation-demodulated output is generated by correlation-demodulating a received input; and from the correlation-demodulated output consisting of a first correlation-demodulated output portion corresponding to the first modulated output portion and a second correlation-demodulated output portion corresponding to the second modulated output portion the first correlation-demodulated output portion is detected. Further timing signal serving as a reference for an operation on the receiver side is generated, starting from the first correlation-demodulated output portion.
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Masaharu Mori et al., "A Method of Code Synchronization in a Spread Spectrum Receiver using a SAW Convolver", Journal of Electronic Communication Society of Japan, 86/4, vol. J69-B No. 4, pp. 403-405. (No translation).
Gochi Motohiro
Mori Masaharu
Takeuchi Shigeru
Barron Jr. Gilberto
Clarion Co. Ltd.
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