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MSK-type signals in the presence of adjacent channel interference and white noise

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2 Author(s)
Hougui, R.Y. ; Dept. of Electr. Eng., Tel Aviv Univ., Israel ; Kalet, I.

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

Published in:

Communications, IEEE Transactions on  (Volume:45 ,  Issue: 4 )

Date of Publication:

Apr 1997

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