Measurement of spatial signature information in CDMA wireless communication systems
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United States of America Patent
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Oct 15, 2002
Issued Date -
N/A
app pub date -
Jan 15, 1999
filing date -
Jan 8, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A CDMA receiver for measuring spatial signal information corresponding to several user transmitters comprises a bank of coherent receivers coupled to an antenna array, a bank of signal buffers for recording samples of the received signal data, and a bank of I/Q despreaders for despreading selected signal samples. The receiver also comprises a buffer control circuit for selecting active power control groups in the recorded signal samples for despreading, and a despreader control circuit for selecting PN despreading sequences required to despread the selected power groups. Selected data samples from the signal buffers are fed into the despreaders. The output of the despreaders is a set of spatially correlated I/Q data streams divided into temporal frames, where each frame contains active power control groups from different user transmitters.
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