The Cut-off Rate of Digital Radio-links Impaired by Time-correlated Multipath Phenomena
نویسندگان
چکیده
The symmetric cut-off rate is derived for Quadrature-Amplitude-Modulated (QAM) block-coded data-transmissions over noisy links impaired by timecorrelated multipath-phenomena which give rise to Rayleigh-distributed randomly time-variant Intersymbol Interference (ISI) effects. The presented formulas for the cut-off rate are new; they are derived from a random coding bound developed “ad hoc” for bounding the ensemble-averaged block-error probability of a Maximum Likelihood (ML) decoder supported by perfect ChannelState-Information (CSI). The assumption of timecorrelated ISI phenomena introduces memory in the link and makes the underlying ISI-channel a continuous-state channel with memory.
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