Spread spectrum communication system

Details Spread spectrum communication system Spread spectrum communication system

1994-05-26

1998-10-20

Bocure, Tesfaldet

Pulse or digital communications

Repeaters

Testing

375316, 375295, H04B 166, H04K 100, H04L 2232

Patent

active

058258051

ABSTRACT:
Digital data for generating a signal having a prescribed waveform is stored beforehand in the memory on the transmitting side of a communication system. The prescribed waveform is one obtained by combining signals having mutually different frequencies corresponding to the digits of a spread-spectrum code comprising a plurality of digits. When transmission data is inputted, the system generates, for every bit of data, a signal waveform corresponding to the value of the bit, based upon the data stored in the memory. The generated signal is a signal which has undergone spreading. This signal is placed upon a carrier wave and then sent to a transmission line. Like the transmitting side, the receiving side possesses digital data for generating a signal having a prescribed waveform. When a signal is received, the system generates a signal based upon the data possessed, multiplies this by the received signal and effects a conversion into a signal having an intermediate frequency. Signals in a prescribed frequency band are filtered out of the intermediate frequency and data is demodulated from the filtered signal.

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Office Action dated Jun. 4, 1996 of Japanese Patent Application No. 2-56133 (corresponding to U.S. Patent No. 5,177,767, of record).

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