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- W2000375995 abstract "In the context of synchronous random DS-CDMA (Direct Sequence Code Division Multiple Access) communications over a mobile network, the receiver that minimizes the peruser bit error rate (BER) is the symbol Maximum a posteriori (MAP) detector. This receiver is derived under the hypothesis of perfect channel state information at the receiver. In this paper we consider the case where the channel noise variance is estimated and analyze the effect of this mismatch. We show that the Bit Error Rate (BER) is piece-wise monotonic wrt. the estimated noise variance, reaching its minimum for the true channel variance. We also provide an upper bound of the individually optimum receiver performance under noise variance mismatch. Thus we give a theoretical justification for the usual bias towards noise variance underestimation adopted by the community." @default.
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- W2000375995 date "2006-07-01" @default.
- W2000375995 modified "2023-09-23" @default.
- W2000375995 title "Noise Variance Estimation in DS-CDMA and its Effects on the Individually Optimum Receiver" @default.
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- W2000375995 doi "https://doi.org/10.1109/spawc.2006.346355" @default.
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