Optimum codes for FFH
By: BFSK receivers with self-normalization combining and hard decision decoding in fading channels
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1997
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 71
Subjects: DIGITAL COMMUNICATIONS; PHASE SHIFT KEYERS; FREQUENCY AGILITY
Description: The application of forward error correction coding to a fast frequency-hopped binary frequency-shift keying (FFH/BFSK) noncoherent receiver with self-normalization combining under broadband and partial-band jamming is discussed in this thesis. The performance of the receiver is examined when data are encoded using Reed-Solomon codes, convolutional codes, and concatenated Reed-Solomon and convolutional codes, all with hard decision decoding. The effects of the transmission channel is considered, and results are derived for a Rayleigh fading channel and Ricean fading channels with several different ratios of direct-to-diffuse signal power. Only frequency nonselective, slowly fading channels are considered. The combination of diversity and forward error correction coding is found to improve the performance of the receiver in the presence of both broadband and partial-band jamming and optimum codes for each coding scheme are also discussed.
Notes: Thesis advisors, Tri T. Ha, R. Clark Robertson.

AD-A331 918.

Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 1997.

Includes bibliographical references (p. 69-70).

Also available online.

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