Spread-spectrum signal receiver apparatus and interference...

Details Spread-spectrum signal receiver apparatus and interference... Spread-spectrum signal receiver apparatus and interference...

2005-07-19

2005-07-19

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S147000, C375S316000

Reexamination Certificate

active

06920173

ABSTRACT:
In a spread-spectrum signal receiver apparatus for receiving a spread-spectrum signal and demodulating transmit data from the signal, a receiver receives a spread-spectrum signal that has been spread by a spreading code comprising a combination of a first code that varies depending upon spreading factor and a second code that differs for every user, an interference canceller produces a replica of an interference signal from the receive signal using a despreading code comprising a combination of the first code, which is regarded as a code decided based upon a minimum spreading factor, and the second code that differs for every user, and a receive modulator demodulates transmit data from a signal obtained by subtracting the replica from the receive signal.

REFERENCES:
patent: 2003/0179814 (2003-09-01), Juntti et al.
patent: 2000269932 (2000-09-01), None

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