Structure of a coherent dual channel QPSK transceiver using pilot symbols in a code division multiple access system
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Jul 14, 1998
filing date -
Nov 25, 1997
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Abstract
The present invention proposes a structure of a coherent dual-channel QPSK transceiver using pilot symbols in a code division multiple access system, which can reduce the variation width of the entire transmission signal by putting pilot symbols into data bit streams, can remove a crosstalk by separating input information bits into two channels and then allocating different quadrature codes to respective channels, and can also improve the error performance of the entire system by preventing changes in phases of the transmission carrier and reducing the degree of the envelope variation of the entire signals.
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