Bit error probability of Rake receiver in the presence of code synchronization errors and correlated Rayleigh fading channels
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چکیده
We derive here a simple and accurate theoretical method for computing the bit-error-probability (BEP) of a direct-sequence spread spectrum (DS-SS) receiver using maximum ratio combiner (MRC), in the presence of code synchronization errors, root raised cosine (RRC) pulse shaping, and Rayleigh fading channels with correlated paths. Theoretical BEP curves with QPSK modulation are validated by link level simulations for different downlink Rayleigh fading channels. The impact of the delay estimation errors on the performance of Rake receiver is analyzed for both closely-spaced and distant channel taps, and for different path correlation coefficients.
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تاریخ انتشار 2003