Spread spectrum communication system

Details Spread spectrum communication system Spread spectrum communication system

1997-09-16

1999-12-28

Ohin, Stephen

Pulse or digital communications

Repeaters

Testing

375200, H04B 1500, H04K 100, H04L 2730

Patent

active

060091177

ABSTRACT:
A convolutional coding unit generates transmission data by performing an error correcting code process for sending data. A mapping unit arranges the transmission data at signal points corresponding to the data value. A PN sequence generating unit generates a PN sequence based on part of the transmission data. A spreading unit spreads a transmission signal by multiplying an output of the mapping unit by the PN sequence generated with the PN sequence generating unit. A despreading unit detects the PN sequence used on a transmitting side, and despreads the received signal by using the detected PN sequence. A remapping unit obtains the transmission data from the signal points at which the received signal is arranged. A supplementary information processing unit obtains supplementary information based on the detected PN sequence. A Viterbi decoding unit regenerates the sending data from the transmission data by using the supplementary information.

REFERENCES:
patent: 5159608 (1992-10-01), Flconer et al.
patent: 5204874 (1993-04-01), Falconer et al.
patent: 5450453 (1995-09-01), Frank
patent: 5515396 (1996-05-01), Dalekotzin

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