Title :
MSK-type signals in the presence of adjacent channel interference and white noise
Author :
Hougui, R. Yair ; Kalet, Irving
Author_Institution :
Dept. of Electr. Eng., Tel Aviv Univ., Israel
fDate :
4/1/1997 12:00:00 AM
Abstract :
In this letter, the problem of adjacent channel interference (ACI) caused by the close packing of constant envelope MSK-type users in a given frequency band is considered. An optimal receiver filter, based on the theory of matched filtering, is found, and it serves as an upper bound on the signal-to-interference ratio. The intersymbol interference (ISI) caused by the time response of the matched filter is eliminated by a decision feedback equalizer (DFE) which, however, degrades performance. It was found that the matched-filter upper bound allows about 3-15 dB more ACI than the performance of a classical correlation detector (for additive white Gaussian noise only), depending on the frequency separation between channels. The DFE performance is only a little bit worse than that of the matched filter
Keywords :
adjacent channel interference; decision feedback equalisers; digital filters; interference suppression; intersymbol interference; matched filters; minimum shift keying; radio receivers; radiofrequency interference; white noise; ACI; DFE performance; MSK-type signals; adjacent channel interference; constant envelope MSK-type users; decision feedback equalizer; intersymbol interference; matched filtering; optimal receiver filter; performance; signal-to-interference ratio; time response; white noise; Decision feedback equalizers; Degradation; Detectors; Filtering theory; Frequency; Interchannel interference; Intersymbol interference; Matched filters; Time factors; Upper bound;
Journal_Title :
Communications, IEEE Transactions on
