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

Volume

45

Issue

4

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

404

Lastpage

407

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;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.585913

Filename

585913