Performance of FH/MFSK Systems with Readable Erasures

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题名:	Performance of FH/MFSK Systems with Readable Erasures
作者:	Jyu-Wei Wang;Young-Long Chen;Jyh-Horng Wen
关键词:	FH-CDMA;modulation/demodulation;Reed-Solomon code;BCH code;erasure-only decoding;decoder error probability;throughput;slotted ALOHA;spread ALOHA
日期:	2007-05
上传时间:	2010-05-12 01:11:46 (UTC+0)
出版者:	Asia University
摘要:	We propose a readable-erasure channel for frequency-hopping spread-spectrum multiple access systems with MFSK modulation scheme (FH/MFSK). In contrast to the conventional erasure-only channel having M+1 output symbols, the proposed readable-erasure channel has 2M output symbols. Half of the symbols are related to hit-free transmissions, and the rest of the symbols, referred to as weak symbols, are related to transmissions that were hit. The essence of the readable erasure is in the information hidden inside it. One may explore such information by using channel coding. Our analysis shows that in conjunction with channel coding, the readable-erasure channel may enjoy performance advantage over the erasure-only channel. By taking the spectrum efficiency into consideration, we point out that using RS codes over large channel alphabet size in FH/MFSK systems is inefficient. Thus, for FH/MFSK systems, we suggest BCH codes over GF(4) for use with the readable-erasure channel.
關聯:	Computer Communications 80(7): 1538-1545
显示于类别:	[光電與通訊學系] 期刊論文

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