DocumentCode :
2981260
Title :
Current designs for fast frequency hopping with MFSK
Author :
Royster, Thomas C., IV
Author_Institution :
MIT Lincoln Laboratory, USA
fYear :
2011
fDate :
7-10 Nov. 2011
Firstpage :
543
Lastpage :
548
Abstract :
The performance of many existing communications systems can be improved simply by replacing the currently used forward error correction (FEC) code with a modern iteratively decodable FEC code. The potential improvements of adding modern FEC are even more pronounced for systems that do not currently employ any FEC. In this paper, we compare the performance of fast frequency hopping with simple diversity schemes using only symbol repetition and diversity schemes that also employ convolutional codes, short-block-length iteratively decodable codes, and long-block-length iteratively decodable codes. Both partial-band noise and multi-tone jamming channels are considered. The most powerful codes-namely, the long block length iteratively decodable codes-are shown to greatly improve link robustness while at the same time allow larger data rates than the traditional diversity approaches. In addition, it is demonstrated that these codes enable a system to realize the full benefit of independent tone hopping.
Keywords :
convolutional codes; decoding; error correction codes; forward error correction; frequency shift keying; jamming; MFSK; convolutional codes; decodable FEC code; diversity scheme; fast frequency hopping; forward error correction code; long-block-length iteratively decodable codes; multitone jamming channels; partial-band noise; short-block-length iteratively decodable codes; symbol repetition; Diversity reception; Encoding; Forward error correction; Frequency shift keying; Interference; Jamming; Noise;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
MILITARY COMMUNICATIONS CONFERENCE, 2011 - MILCOM 2011
Conference_Location :
Baltimore, MD
ISSN :
2155-7578
Print_ISBN :
978-1-4673-0079-7
Type :
conf
DOI :
10.1109/MILCOM.2011.6127728
Filename :
6127728
Link To Document :
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