Broadband implementation of supplemental code channel carrier phase offsets
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United States of America Patent
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-
Mar 20, 2001
Grant Date -
N/A
app pub date -
Dec 16, 1997
filing date -
Dec 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Reverse channel circuitry for CDMA based mobile stations which allows carrier phase offsets to be implemented at baseband, thereby eliminating the need for multiple quadrature modulators and excessive D/A converters. In addition, just four baseband filters, two using scaled coefficients and the other two unscaled coefficients, are time multiplexed to produce in-phase and quadrature terms. The invention can lead to a significant savings in hardware and be a valuable tool in implementing multiple code channels with different carrier phase offsets.
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