Quantized Multimode Precoding in Spatially Correlated Multi-Antenna Channels

Abstract-- Multimode precoding, where the number of independent data-streams is adapted optimally, can be used to maximize the achievable throughput in multi-antenna communication systems. Motivated by standardization efforts embraced by the industry, the focus of this work is on systematic precoder design with realistic assumptions on the spatial correlation, channel state information (CSI) at the transmitter and the receiver, and implementation complexity. For the spatial correlation of the channel matrix, we assume a general channel model, based on physical principles, that has been verified by many recent measurement campaigns. We also assume a coherent, linear minimum mean-squared error (MMSE) receiver and knowledge of the spatial statistics at the transmitter along with the presence of an ideal, low-rate feedback link from the receiver to the transmitter. The reverse link is used for codebook-index feedback and the goal of this work is to construct precoder codebooks, adaptable i...

• Type: Journal
• Year: 2008
• Where: CORR
• Authors: Vasanthan Raghavan, Venugopal V. Veeravalli, Akbar M. Sayeed
• Keywords: Codebook, Codebook Design, CORR 2008, Education, Spatial Correlation