Performance of MUTP-aided MIMO systems over correlated frequency-selective wireless communication channels a multi-cell perspective文档.pdf

Nagaradjane et al. EURASIP Journal on Wireless Communications and ?Networking 2012, 2012:194 /content/2012/1/194 RESEARCH Open Access Performance of MUTP-aided MIMO systems over correlated frequency-selective wireless communication channels: a multi-cell perspective 1* 2 4 3 Prabagarane Nagaradjane , Sabarish Karthik Vivek Sarathy , Prasaanth Muralidharan and Yuvika Ashwina Rajan Abstract In this article, we investigate the performance of multiuser transmitter preprocessing (MUTP)-aided multiple-input multiple-output (MIMO) systems in a multi-cell multiuser setting where co-channel interference (CCI) is the major channel impairment, for both uplink (UL) and downlink (DL) transmissions. CCI can considerably reduce data rates resulting in outages in cellular systems, particularly at the cell edges in DL transmission. The MUTP considered in this article is based on singular value decomposition (SVD), which exploits the channel state information (CSI) of all the users at the base stations (BSs) with the aid of BS cooperation, and only the individual users’ CSI at the mobile stations (MSs) for both UL and DL transmissions. In particular, in this article, we study the effects of three types of delay spread distributions coupled with different interferer configurations over correlated and uncorrelated frequency-selective channels. Our simulation study shows that SVD-aided MUTP perfectly eliminates CCI with lesser detection complexity under perfect CSI. Also, we provide performance comparisons of SVD-aided MUTP with various precoding techniques widely addressed in literature, and the results show that it provides better achievable symbol error rate (SER) by mitigating mul