TDMA - CDMA White Papers
Decoupling of CDMA Multiuser Detection Via the Replica Method
Overview In CDMA, the optimal multiuser detector in mean square sense is the conditional mean estimator (CME) regardless of the input distribution, which outputs the expected value of the transmitted symbols conditioned on the received signal and the channel state (spreading sequences, fading, etc). This paper notes that every multiuser detector can be reformulated as the CME for a certain postulated CDMA channel with a postulated input distribution, which may be different from the actual channel and inputs. Using the replica method developed in statistical physics, a class of generalized CME front end applied to randomly spread CDMA is studied in a unified framework in the large-system limit.
| Publisher | Princeton University | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | September 2003 | Downloads | 8 |
| Format | White Papers | ||
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