Title :
Multiple tone interference of frequency-hopped noncoherent MFSK signals transmitted over Ricean fading channels
Author :
Robertson, R. Clark ; Sheltry, Joseph F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Naval Postgraduate Sch., Monterey, CA, USA
fDate :
7/1/1996 12:00:00 AM
Abstract :
This paper investigates the performance degradation resulting from multitone interference of orthogonal, frequency-hopped, noncoherent 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; and both the signaling tones and the multiple interference tones are assumed to be affected by channel fading. It is also assumed that channel fading need not necessarily affect the signaling tones and the interference tones in the same-way. When the information signal power exceeds the power of the individual interference tones, poorer overall system performance is obtained when the multiple interfering tones experience fading. This trend is accentuated as M increases. When the information signal experiences fading, the effect of fading multiple interference tones on overall system performance lessens, and for a Rayleigh-faded information signal, fading of the multiple interference tones has no effect on overall system performance regardless of M
Keywords :
Rayleigh channels; Rician channels; fading; frequency hop communication; frequency shift keying; jamming; spread spectrum communication; thermal noise; FH M-ary orthogonal signaling tones; Rayleigh faded information signal; Ricean fading channels; channel fading; frequency-hopped noncoherent MFSK signals; information signal power; multiple equal power jamming tones; multiple tone interference; noncoherent M-ary frequency-shift keyed receivers; orthogonal FH/MFSK receivers; performance degradation; spread spectrum communications; system performance; thermal noise; wideband noise; Additive white noise; Bandwidth; Fading; Frequency; Gaussian noise; Interference; Jamming; Signal processing; Spread spectrum communication; System performance;
Journal_Title :
Communications, IEEE Transactions on