Asymmetric spread spectrum correlator
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United States of America Patent
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May 14, 1991
Grant Date -
N/A
app pub date -
Aug 7, 1989
filing date -
Aug 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for decoding a received spread spectrum signal having a data signal modulated with a pseudo-noise code and transmitted as an RF spread spectrum signal. A reference-sequence-storage device holds a reference-pseudo-noise signal, and a receive-sequence storage device holds a received spread spectrum signal. A chip comparator adds each chip of the received spread spectrum signal by each respective chip of the pseudo-noise signal, thereby generating a plurality of chip comparison signals. A summer adds the plurality of chip comparison signals, generating a correlation signal. The comparator compares the correlation signal to a statistically predetermined threshold level, and generates a first data-symbol signal.
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