Abstract
We propose a new type of RAKE receiver for complementary code keying (CCK) codes, which is suitable for a multipath environment with large delay spread. As the delay spread becomes larger, inter-symbol interference (ISI) and inter-chip interference (ICI) generated due to multipath environments are increased. To handle the increasing ISI and ICI, the CCK wireless LAN modem needs ISI and ICI cancellation techniques, together with RAKE processing. So, our proposed system is based on a channel matched filter (CMF) with decision feedback equalizer (DFE) and includes a codeword DFE structure. In our system, ICI and ISI are calculated by using the detected CCK codeword. Also, our proposed receiver uses the error correcting capability of CCK codes, and it can remove ISI and ICI at the same time.
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