Performance Evaluation of Slow-Frequency-Hopping Spread Spectrum Transmission in Rayleigh Fading Indoor Channels (Special Issue on Personal, Indoor and Mobile Radio Communications)

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This paper examines the retransmission probability and throughput characteristics of slow-frequency-hopping spread spectrum transmission in Rayleigh fading indoor channels of multi-cell environments. Because signal strength in a Rayleigh fading indoor channel changes slowly, retransmission probability is little influenced by the retransmission unit length and error correction capability when retransmission unit length is shorter than the fading period. With the 83.5 MHz bandwidth of the 2.4 GHz ISM (Industrial, Scientific, and Medical) band in the USA, quaternary phase shift keying (QPSK) is expected to provide a throughput of nearly 1 Mbps in each cell when we assume a shadowing margin of 18.1 dB and we use 4 cells, 100 hopping frequencies, a transmisson power of 600 mW, and a transmission distance of 20 m. And also with the 26 MHz bandwidth of the 2.4 GHz ISM band in Japan, QPSK is expected to provide a throughput of nearly 1 Mbps in each cell under similar conditions but with 26 hopping frequencies and a transmission power of 260 mW.
一般社団法人電子情報通信学会の論文
1994-07-25