Code division multiple access communication

Details Code division multiple access communication Code division multiple access communication

2000-09-20

2008-10-07

Vo, Don N (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

Reexamination Certificate

active

07433385

ABSTRACT:
In a CDMA communication system, stations operating in the same area transmit to a receiver using a common carrier frequency. Each station transmits a plurality of bits in parallel using orthogonal spreading signals. These spreading signals are used by the stations in time-offset manner so that the transmissions from the stations are mutually orthogonal. The spreading signals may be generated by phase modulating a common spreading sequence so that the spectra of the spreading signals rotate at different rates.

REFERENCES:
patent: 5327455 (1994-07-01), De Gaudenzi et al.
patent: 5822363 (1998-10-01), Le Roy
patent: 6181674 (2001-01-01), Xin et al.
patent: 6553018 (2003-04-01), Ichihara
patent: 2002/0097779 (2002-07-01), Bang et al.

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