Multi-channel spread spectrum communications system

Details Multi-channel spread spectrum communications system Multi-channel spread spectrum communications system

2007-07-10

2007-07-10

Kizou, Hassan (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Quadrature carriers

C370S208000, C370S329000, C370S335000

Reexamination Certificate

active

10174768

ABSTRACT:
A multi-channel spread spectrum communications system utilizes the combination of spreading codes to represent and transfer information. On the transmitter side, every block of data bits is divided into two sub-blocks of data bits. One sub-block is mapped to a number of spreading codes, while another sub-block is separated further into several smaller sub-blocks with each of them mapped into an M-ary phase. Each selected spreading code is modulated by the corresponding M-ary phase. On the receiver side, first determine the most likely transmitted spreading codes and their respective phases, then reverse map the set of estimated transmitted spreading codes into a block of bits and each of the phases into another block of data bits, and finally combine all these blocks to a single block of data bits.

REFERENCES:
patent: 6324209 (2001-11-01), Li et al.
patent: 6937641 (2005-08-01), Li et al.
patent: 2004/0001534 (2004-01-01), Yang

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