TY - GEN
T1 - π/4-shift QPSK coherent detection demodulator for TDMA/TDD systems
AU - Matsumoto, Y.
AU - Kubota, S.
AU - Morikura, M.
AU - Kato, S.
PY - 1993/1/1
Y1 - 1993/1/1
N2 - This paper proposes a π/4-shift QPSK coherent detection demodulator for microcellular TDMA/TDD systems. The demodulator employs a reverse-modulation type carrier recovery circuit with a -π/4 signal phase rotator for coherent detection, and an initial clock recovery circuit for fast synchronization of transmitted bursts. Computer simulation results show that coherent detection with the proposed carrier recovery circuit reduces the irreducible frame error rate by 50% compared with differential detection, and achieves a 4 dB improvement at a frame error rate of 10-2 with transmission diversity in the fading channel typical of personal communication. In addition, the proposed initial clock recovery circuit is useful to avoid hangup and to shorten the preamble bits needed for clock recovery.
AB - This paper proposes a π/4-shift QPSK coherent detection demodulator for microcellular TDMA/TDD systems. The demodulator employs a reverse-modulation type carrier recovery circuit with a -π/4 signal phase rotator for coherent detection, and an initial clock recovery circuit for fast synchronization of transmitted bursts. Computer simulation results show that coherent detection with the proposed carrier recovery circuit reduces the irreducible frame error rate by 50% compared with differential detection, and achieves a 4 dB improvement at a frame error rate of 10-2 with transmission diversity in the fading channel typical of personal communication. In addition, the proposed initial clock recovery circuit is useful to avoid hangup and to shorten the preamble bits needed for clock recovery.
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M3 - Conference contribution
AN - SCOPUS:0027206529
SN - 078031266X
T3 - IEEE Vehicular Technology Conference
SP - 396
EP - 399
BT - IEEE Vehicular Technology Conference
PB - Publ by IEEE
T2 - Proceedings of the 43rd IEEE Vehicular Technology Conference
Y2 - 18 May 1993 through 20 May 1993
ER -