High Capacity and Wide Coverage Cell Station for Personal Communication Systems

Kiyoshi KOBAYASHI  Tomoaki KUMAGAI  Shuji KUBOTA  Shigeaki OGOSE  Takeshi HATTORI  

IEICE TRANSACTIONS on Communications   Vol.E82-B   No.1   pp.112-119
Publication Date: 1999/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Communication Systems and Transmission Equipment
personal communication,  cell station,  diversity,  coherent detection,  burst-by-burst AFC,  

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This paper proposes a new cell station (CS) configuration for personal communication systems. The proposed CS employs a modified coherent demodulator with 4-branch maximal ratio combining diversity and a burst-by-burst automatic frequency control (AFC) to enhance the coverage. The proposed CS also employs an antenna-sharing diversity transmission to incorporate more than one transceiver block into a small unit with high power efficiency. With these techniques, the BER performance of the uplink control channel (CCH) is flattened regardless of carrier frequency errors within 12 kHz; the diversity gain of uplink traffic channel (TCH) is improved by 2 dB; the downlink transmission power is reduced by 1.9 dB.