Interference mitigation via joint detection in a fading environment

Jungwon Lee, Dimitris Toumpakaris, Wei Yu

Abstract: This paper considers the detection problem for fading channels in the presence of interference when both the transmitter of interest and the interferers employ practical modulation schemes. It is shown that, for Rayleigh fading, it is possible to obtain symbol error rates that have the same dependence on the received signal-to-noise ratio as when transmission is interference-free. This is achieved using detectors that employ knowledge on the channel and on the modulation schemes of the interference. Therefore, the use of interference-aware detectors can increase the overall capacity and improve the reliability of wireless systems, justifying the use of additional knowledge on the interferers that is required for implementation as compared to detectors that do not differentiate interference from noise.