DocumentCode :
1131515
Title :
Staggered interleaving and iterative errors- and-erasures decoding for frequency-hop packet radio
Author :
Macdonald, Thomas G. ; Pursley, Michael B.
Author_Institution :
Holcombe Dept. of Electr. & Comput. Eng., Clemson Univ., Lexington, MA, USA
Volume :
2
Issue :
1
fYear :
2003
Firstpage :
92
Lastpage :
98
Abstract :
Information about the reliabilities; of the received symbols is very beneficial in frequency-hop communication systems. This information, known as side information, can be used to erase unreliable symbols at the input to an errors-and-erasures decoder. For slow-frequency-hop systems it is common that special redundant symbols, referred to as side-information symbols, are included in each dwell interval, and the demodulation of these symbols provides the side information. The corresponding decrease in the number of message symbols that can be sent in each dwell interval makes it desirable to develop alternative methods that do not require side-information symbols. In this paper, one such alternative is proposed, and its performance is evaluated for channels with partial-band interference. It is shown that staggered interleaving of Reed-Solomon code words and iterative errors-and-erasures decoding facilitates the erasure of unreliable symbols without the need for side-information symbols. The performance of this method is compared with the performance of systems that employ standard block interleaving and errors-only decoding or errors-and-erasures decoding with side information obtained from test symbols.
Keywords :
Reed-Solomon codes; frequency hop communication; interleaved codes; iterative decoding; land mobile radio; packet radio networks; radiofrequency interference; Reed-Solomon code; block interleaving; demodulation; dwell interval; errors-and-erasures decoder; errors-only decoding; frequency-hop communication systems; frequency-hop packet radio; iterative errors-and-erasures decoding; message symbols; mobile wireless communication system; partial-band interference; performance evaluation; received symbols reliability; redundant symbols; side information; side-information symbols; slow-frequency-hop systems; staggered interleaving; test symbols; Demodulation; Error correction codes; Frequency; Interference; Interleaved codes; Iterative decoding; Packet radio networks; Reed-Solomon codes; Spread spectrum communication; System testing;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2002.806368
Filename :
1175122
Link To Document :
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