Title :
Generalized precoder design for MIMO interference channel based on interference alignment
Author :
Sun, Huan ; Fang, Wei
Author_Institution :
Res. & Innovation Center, Alcatel-Lucent Shanghai Bell, Shanghai, China
Abstract :
Recent research shows that K user time-varying interference channel is capable of achieving K/2 degrees of freedom based on the idea of interference alignment. In multiple-input-multiple-output (MIMO) interference channels, appropriate transmit precoder design plays a pivotal role in efficiently suppressing the co-channel interference. In this paper, we propose a generalized precoder design for MIMO interference channels with the aid of interference alignment. Specifically, we consider the precoder design for both symmetric system where each of the transmit and receive nodes is equipped with the same number of antennas, and asymmetric system where the number of antennas at transmit node exceeds its counterpart at receive node. As demonstrated by the simulation results, our proposed precoder design is capable of significantly improving the system sum capacity.
Keywords :
MIMO communication; cochannel interference; interference suppression; precoding; time-varying channels; MIMO interference channel; antenna; asymmetric system; cochannel interference suppression; degrees of freedom; generalized precoder design; interference alignment; multiple-input-multiple-output interference channel; time-varying interference channel; Interference channels; MIMO; Receiving antennas; Transmitting antennas; MIMO; interference alignment; interference channel; precoder;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4577-1346-0
Electronic_ISBN :
pending
DOI :
10.1109/PIMRC.2011.6139837