Title :
Co-Channel Interference Mitigation in MIMO-OFDM System
Author :
He, Chunwei ; Liu, Fuqiang ; Yang, Hua ; Chen, Ci ; Sun, Hongmei ; Wu May ; Zhang, Ji
Author_Institution :
Broadband Wireless Commun. & Multimedia Lab., Tongji Univ., Shanghai
Abstract :
OFDMA (orthogonal frequency division multiple access) has emerged as a promising physical layer technology for 4G wireless networks. Along with the requirement for higher system capacity, how to improve cell edge performance to provide better QoS (quality of service) support has become a pressing issue. Considering the channel characteristic in wireless communication, new interference avoidance based algorithms, which consider both time domain and frequency domains, are proposed to mitigate the influence of frequency selective channel on cell edge user in MIMO-OFDM system. Meanwhile, in order to further improve the system spectral efficiency, an algorithm that integrates beamforming is put forward. Simulation results show that the proposed algorithms can improve the throughput of cell edge user effectively as well as the overall system throughput.
Keywords :
4G mobile communication; MIMO communication; OFDM modulation; cellular radio; cochannel interference; interference suppression; quality of service; radiofrequency interference; 4G wireless networks; MIMO-OFDM System; QoS; cochannel interference mitigation; frequency selective channel; interference avoidance; orthogonal frequency division multiple access; quality of service; wireless cellular communication systems; Array signal processing; Frequency conversion; Frequency domain analysis; Interchannel interference; Physical layer; Pressing; Quality of service; Throughput; Wireless communication; Wireless networks;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.58
