A Leakage-Based Precoding Scheme for Downlink Multi-User MIMO Channels |
| |
| Authors: | Sadek M. Tarighat A. Sayed A.H. |
| |
| Affiliation: | Dept. of Electr. Eng., California Univ., Los Angeles, CA; |
| |
| Abstract: | In multiuser MIMO downlink communications, it is necessary to design precoding schemes that are able to suppress co-channel interference. This paper proposes designing precoders by maximizing the so-called signal-to-leakage-and-noise ratio (SLNR) for all users simultaneously. The presentation considers communications with both single- and multi-stream cases, as well as MIMO systems that employ Alamouti coding. The effect of channel estimation errors on system performance is also studied. Compared with zero-forcing solutions, the proposed method does not impose a condition on the relation between the number of transmit and receive antennas, and it also avoids noise enhancement. Simulations illustrate the performance of the scheme |
| |
| Keywords: | |
|
|
