Technique for searching for a preamble signal in a spread spectrum signal using a fast Hadamard transform

Technique for searching for a preamble signal in a spread spectrum signal using a fast Hadamard transform

In one embodiment, a method for demodulating and searching for a preamble signal containing a complex phasor signal is disclosed. The complex phasor is demodulated using a phasor-rotated fast transformer. A received signal is correlated with a spreading code to produce a correlated signal. The corre...

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Hauptverfasser: BRIKER DANIEL, ZILBERMAN GENNADY, ARVIV ELIAHOU
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Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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creator BRIKER DANIEL
ZILBERMAN GENNADY
ARVIV ELIAHOU
description In one embodiment, a method for demodulating and searching for a preamble signal containing a complex phasor signal is disclosed. The complex phasor is demodulated using a phasor-rotated fast transformer. A received signal is correlated with a spreading code to produce a correlated signal. The correlated signal is coherently accumulated to produce a coherently accumulated signal. A first phasor-rotated signal transformation is performed on a real component of the coherently accumulated signal, and a second phasor-rotated signal transformation is performed on an imaginary component of the coherently accumulated signal. Finally, the signal power of the transformed real and imaginary components of the coherently accumulated signal is determined.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
title Technique for searching for a preamble signal in a spread spectrum signal using a fast Hadamard transform
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