Title :
Interference rejection for IS-54 signals
Author :
Majmundar, Milap V. ; Reed, Jeffrey H. ; Petrus, Paul
Author_Institution :
MPRG, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
Interference rejection using a time-dependent adaptive filter (TDAF) combined with differential demodulation is investigated for π/4-DQPSK signal corrupted by Rayleigh faded multipath channel with co-channel interference. It is shown that the TDAF combined with differential decoding can achieve significant performance improvement over a time-independent Alter or the conventional matched filter receiver by exploiting the inherent spectral correlation of the signal. A reduced-complexity TDAF structure that is more suitable for practical implementation is also presented
Keywords :
Rayleigh channels; adaptive filters; adaptive signal processing; cochannel interference; correlation methods; demodulation; differential phase shift keying; encoding; fading; interference suppression; land mobile radio; multipath channels; quadrature phase shift keying; radiofrequency interference; π/4-DQPSK signal; IS-54 signals; Rayleigh faded multipath channel; cellular systems; cochannel interference; differential decoding; differential demodulation; interference rejection; matched filter receiver; performance; reduced complexity TDAF structure; spectral correlation; time-dependent adaptive filter; time-independent filter; Adaptive filters; Cities and towns; Decoding; Digital modulation; Filtering; Frequency estimation; Interference; Matched filters; Signal generators; Signal processing;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.501527
