Electronic counter-counter measures potential of a noncoherent FH/MFSK communications system under conditions of worst case hostile electronic counter measures and fading channels
Contributors: Naval Postgraduate School (U.S.) 
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1997
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 87
Subjects: FADING (ELECTROMAGNETIC WAVES); INTERFERENCE; ELECTRONIC COUNTER COUNTERMEASURES
Description: This thesis investigates the performance degradation resulting from multitone interference of orthogonal,      noncoherent, frequency-hopped, M-ary frequency-shift keyed receivers (FH/MFSK) where the effect of thermal      and other wideband noise is not neglected. The multiple, equal power jamming tones are assumed to correspond to      some or all of the possible FH M-ary orthogonal signaling tones. Furthermore, the channel is modeled as a Ricean      fading channel, a possibility precluded when thermal noise is neglected. Both the signaling tones and the multiple      interference tones are assumed to be affected by channel fading. Both band and independent band multitone      interference are considered. Performance is evaluated by obtaining a union bound on the probability of bit error,      and receiver performance is compared with exact results for band multitone interference of a noncoherent      FH/MFSK receiver under comparable circumstances. Except for the case of Rayleigh fading of the signal, the      union bound is very tight for those cases that can be compared with exact results. The advantages of the union      bound approach are twofold. First, the union bound approach yields a solution that is far less computationally      intensive than that obtained with the exact approach. Second, the union bound approach allows numerical results to      be obtained for interference conditions that are not amenable to exact analysis, such as independent multitone      interference of FH/ MFSK.
Notes: Thesis advisor, R. Clark Robertson.

AD-A331 974.

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

Includes bibliographical references (p. 77-78)

dk/dk cc:9116 11/14/97.