Detection of impulse noise using unused codes in CDMA systems

Details Detection of impulse noise using unused codes in CDMA systems Detection of impulse noise using unused codes in CDMA systems

2005-02-22

2005-02-22

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S254000, C704S222000

Reexamination Certificate

active

06859488

ABSTRACT:
An impulse detector which can detect both low and high levels of impulse noise in a CDMA system is comprised of circuitry to calculate the background noise level in unused codes. Another circuit calculates the average noise power in the unused codes of each spreading interval to output the noise power per spreading interval. This average is continuously averaged over spreading intervals by another circuit which outputs the average background noise power. A comparator compares the noise power in the current spreading interval with the background noise power plus a programmable threshold and generates an erasure indication if the background noise power plus a discrimination threshold is exceeded.

REFERENCES:
patent: 5619167 (1997-04-01), Adachi
patent: 5703904 (1997-12-01), Langberg
patent: 6604070 (2003-08-01), Gao et al.
patent: 6647070 (2003-11-01), Shalvi et al.
patent: 6671667 (2003-12-01), Chandran et al.
patent: 20030043925 (2003-03-01), Stopler et al.
patent: 20030099287 (2003-05-01), Arambepola

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