Invention Grant
US07986728B2 Equalizer with combined CCK encoding-decoding in feedback filtering of decision feedback equalizer 有权
均衡器具有组合CCK编码解码在反馈滤波中的判决反馈均衡器

Equalizer with combined CCK encoding-decoding in feedback filtering of decision feedback equalizer
Abstract:
A decision feedback equalizer includes a chip estimate buffer that forms chip estimates into a vector. A CCK decoder decodes the vector of chip estimates, and a CCK encoder, connected with the CCK decoder, re-encodes the vector of chip estimates into a valid CCK code word. At the same time, a chip slicer provides direct sliced chips from the chip estimates. An update module then forms a hybrid vector from the valid CCK code-word and the direct sliced chips for input to the feedback filter of the decision feedback equalizer. The hybrid feedback filter input vector reflects the CCK coding gain of its re-encoded portion thereby reducing the estimated chip error rate to improve the performance of the decision feedback equalizer.
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