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 (fD/fs = 8×10-5, τrms/Ts = 5×10-2) typical of personal communication environments.
|ジャーナル||IEICE Transactions on Communications|
|出版ステータス||Published - 1994 7月 1|
ASJC Scopus subject areas
- コンピュータ ネットワークおよび通信