Title :
Co-channel interference cancellation for D-AMPS hand set
Author :
Hafeez, Abdulrauf ; Molnar, Karl J. ; Bottomley, Gregory E.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Co-channel interference is a major impairment for IS-136 handsets. Joint estimation of cochannel signals can be used to minimize this effect, but traditional approaches require transmissions from different base-stations to be synchronized. In this paper, we consider a semi-blind approach for cancelling asynchronous interference using generalized per-survivor processing for channel acquisition and tracking. Signal delays and medium responses are jointly estimated for symbol-asynchronous co-channel signals assuming knowledge of the signal structure. Simulation results are presented that show C/I gains of 15 dB in the presence of one interferer
Keywords :
adaptive estimation; cellular radio; cochannel interference; demodulation; digital radio; interference suppression; maximum likelihood sequence estimation; personal communication networks; telephone sets; C/I gain; CCI cancellation; D-AMPS hand set; IS-136 handsets; MLSE; adaptive channel estimation; asynchronous interference cancellation; channel acquisition; co-channel interference cancellation; generalized per-survivor processing; joint estimation; semi-blind approach; signal delays; simulation results; symbol-asynchronous co-channel signals; tracking; Delay estimation; Demodulation; Fading; Filters; Frequency synchronization; Interchannel interference; Interference cancellation; Maximum likelihood estimation; Phased arrays; Telephone sets;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.780504
