Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-03-29
2005-03-29
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000, C375S150000, C375S343000, C370S332000, C370S335000, C370S342000, C370S441000, C455S013400, C455S039000
Reexamination Certificate
active
06873645
ABSTRACT:
A receiver receives signals and noise over a frequency spectrum of a desired received signal. The desired received signal is spread using code division multiple access. The received signals and noise are demodulated to produce a demodulated signal. The demodulated signal is despread using a code uncorrelated with a code associated with the desired received signal. A power level of the despread demodulated signal is measured as an estimate of the noise level of the frequency spectrum.
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Kowalski John
Lomp Gary
Ozluturk Fatih
Chin Stephen
Ha Dac V.
InterDigital Technology Corporation
Volpe and Koenig PC
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