DECODING PERFORMANCE OF LINEAR BLOCK-CODES USING A TRELLIS IN DIGITAL MOBILE RADIO

被引：3
|
作者：
MATSUMOTO, T
机构：
[1] NTT Radio Communication Systems Laboratories, Kanagawa-ken, 238, 1-2346, Take, Yokosuka-shi
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 1990年 / 39卷 / 01期
关键词：
D O I：
10.1109/25.54957
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Decoding performance of linear block codes using a trellis is investigated in a Rayleigh fading channel. Two methods to calculate metric values for each bit in a received block are considered: the values are calculated from the received signal envelope sample and demodulator output. Bit error rate (BER) performances between hard decision and trellis decoding are compared using Hamming (7, 4) and Golay (24, 12) codes in computer simulations and laboratory experiments. A simplified trellis decoding algorithm, in which the hard decision output of a bit with the envelope sample greater than the threshold value is accepted as correct, is presented for complexity reduction. Laboratory experimental results for the trellis decoding in combination with Gaussian minimum shift keying (GMSK) modulation and frequency detection are shown. The effect of n-bit A/D-conversion in signal envelope sampling is investigated experimentally. © 1990 IEEE
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页码：68 / 74
页数：7
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