A New Burst Coherent Demodulator for Microcellular TDMA/TDD Systems (Special Issue on Personal, Indoor and Mobile Radio Communications)

概要

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This paper proposes a new burst coherent demodulator that improves transmission quality of microcellular TDMA/TDD systems for personal communications and has configuration suitable for low power consumption with LSIC-implementation. To achieve the better transmission quality, the proposed demodulator employs coherent detection with a unique carrier recovery scheme that can operate without any preamble for carrier recovery. In addition, the demodulator uses a clock recovery scheme with clock phase estimation using twice differentiation, which eliminates hangup and attains fast clock acquisition at 2 samples/symbol. Experimental results clarify the superiority of the proposed coherent demodulator for microcellular TDMA/TDD systems. The proposed coherent demodulator reduces the irreducible frame error rate by 40%, and achieves 4 dB improvement at the frame error rate of 10% compared with differential detection under the Rayleigh fading (f_D/f_S=8×10^<-5>, τ_<rms>/T_S=5×10^<-2>) typical of personal communication environments.
社団法人電子情報通信学会の論文
1994-07-25