Signal acquisition system for spread spectrum receiver

Details Signal acquisition system for spread spectrum receiver Signal acquisition system for spread spectrum receiver

2005-06-21

2005-06-21

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S150000, C375S149000

Reexamination Certificate

active

06909739

ABSTRACT:
A device for detecting a demodulated signal received by a spread spectrum receiver and converted into digital samples. The device is characterized by a matched filter for calculating the correlation between an incoming signal and at least one reference signal, an oscillator for generating a sampling frequency, and a sampling circuit for re-sampling the demodulated digital sample signal at the sampling frequency, which is such that the timing of samples of the references signals of the matched filter corresponds to the timing of a sample signal going from the sampling circuit to the matched filter. The device also includes a multiplier in which the sample signal is multiplied by a carrier replica generated locally before the sampling circuit or thereafter, to remove the carrier from the sample signal.

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Bert Gyselinckx et al. “A 4*2.5Mchip/s Direct Sequence Spread Spectrum Receiver with Digital IF and Integrated ARM6 Core.” In:IEEE 1997 Custom Integrated Circuites Conference, pp. 461-464.
International Search report re: PCT/FI00/00879 mailed Feb. 7, 2001.

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