High capacity and wide coverage cell station for personal communication systems

This paper proposes a new cell station (CS) configuration for personal comm unication systems. The proposed CS employs a modified coherent demodulator with 4-branch maximal ratio combining diversity and a burst-by-burst automa tic frequency control (AFC) to enhance the coverage. The proposed CS also e mploys an antenna-sharing diversity transmission to incorporate more than o ne transceiver block into a small unit with high power efficiency. With the se techniques, the BER performance of the uplink control channel (CCH) is f lattened regardless of carrier frequency errors within +/-12 kHz: the diver sity gain of uplink traffic channel (TCH) is improved by 2 dB; the downlink transmission power is reduced by 1.9 dB.