Single antenna interference suppression in a wireless receiver
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United States of America Patent
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Jul 28, 2009
Grant Date -
Sep 14, 2006
app pub date -
Mar 7, 2006
filing date -
Mar 10, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A novel and useful apparatus for and method of single antenna interference cancellation (SAIC) in a wireless communications system. A class of algorithms is disclosed for Downlink Advanced Receiver Performance (DARP) receivers based on a novel metric calculation used during equalization and optionally in other portions of the receiver as well, e.g., soft value generation. A DARP receiver for 8PSK EDGE modulation is presented wherein the interfering signals comprise GMSK modulated signals. The modified metric takes into account the rotation remaining in the noise component of the received signal after de-rotation of the 8PSK signal. Considering the interferer to be a GMSK signal, the I/Q elements of the noise are correlated and this fact is used to modify the decision rule for the received signal thus improving the performance of the equalizer. The model is further extended to take into account temporal error correlation.
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