RVQ-based beamforming design with MMSE criterion in MISO interference channels

Fan-Shuo Tseng, Jhen-Fong Gu, Shou-Sheu Lin
2014 Signal and Information Processing Association Annual Summit and Conference (APSIPA), 2014 Asia-Pacific  
This paper proposes robust beamforming designs for a multiple-input single-output (MISO) interference channel (IC). Considering the random vector quantization (RVQ) feedback mechanism, we first derive the closed-form expression for the mean-squared error (MSE) metric by averaging over the noise, the quantization error, and the channel amplitude. With the derived MSE result, we devise the robust beamformer by minimizing total MSEs and by minimizing the maximum peruser MSE. Since the
more » ... ce the optimizations of both designs are not convex, we then propose iterative methods to find out the solutions. The simulation results verify the robustness of both designs when the quantization error exists. Index Terms: Multiple-input single-output (MISO), interference channel (IC), robust design, beamformer, minimum meansquared error (MMSE), random vector quantization (RVQ). I. 2 , 0, n k CN σ . The transmit 978-616-361-823-8
doi:10.1109/apsipa.2014.7041531 dblp:conf/apsipa/TsengGL14 fatcat:kolzgpwy2veshgvgkdnlsqq42q