Title :
Performance of soft metrics for convolutional coded asynchronous fast FHSS-MA networks using BFSK under Rayleigh fading
Author :
Kim, Youhan ; Cheun, Kyungwhoon
Author_Institution :
Div. of Electr. & Comput. Eng., Pohang Univ. of Sci. & Technol., South Korea
fDate :
1/1/2003 12:00:00 AM
Abstract :
Performance of robust soft decoding metrics is examined for use in convolutional coded asynchronous fast frequency-hop spread-spectrum multiple-access networks using binary frequency-shift keying under Rayleigh fading channels. For comparison, maximum-likelihood metrics based on a Gaussian approximation are derived. Significant gains are observed compared to hard decision decoding by using appropriate soft metrics.
Keywords :
Rayleigh channels; convolutional codes; decoding; frequency hop communication; frequency shift keying; maximum likelihood decoding; multi-access systems; spread spectrum communication; BFSK; Gaussian approximation; Rayleigh fading channels; asynchronous networks; binary frequency-shift keying; convolutional codes; envelope detector; fast FHSS-MA networks; fast frequency-hop spread-spectrum multiple-access networks; hard decision decoding; maximum-likelihood decoding; soft decoding metrics; Convolutional codes; Fading; Frequency division multiaccess; Frequency shift keying; Maximum likelihood decoding; Pattern matching; Rayleigh channels; Robustness; Spread spectrum communication; Superluminescent diodes;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2002.807600
