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Lo w Complexity Adaptive Code Tracking with Improved Multipath Resolution for DS-CDMA Communications over Fading Channels Peter Schulz-Rittich, Gunnar Fock,
| Content Provider | CiteSeerX |
|---|---|
| Author | Baltersee, Jens Meyr, Heinrich |
| Abstract | Abstract — A new adaptive timing error detector (TED) em-bedded in a code-tracking loop for RAKE reception of direct-sequence-CDMA signals is presented. The loop consists of a dig-ital coherent TED and a loop filter with lowpass characteristic. In a multipath fading environment, one such loop can be allo-cated for each finger in a RAKE receiver and the interference from adjacent paths can be mitigated by adaptively prefiltering the signal prior to the correlation process. The filter coefficients are computed online in order to minimize an interference cost function. Multipaths whose delays differ by as little as one chip duration become resolvable and can be tracked, resulting in sig-nificant performance gains of the overall system, especially if the channel delay spread is small. The tracking performance of the proposed loop is assessed by computer simulation. I. |
| File Format | |
| Access Restriction | Open |
| Content Type | Text |
