The problem of weighted sum-rate maximization for hybrid architecture in millimeter wave communications with dynamic time division duplexing is considered. We propose an over the air pilot- aided direct beamforming estimation technique for the considered problem, by exploiting the channel reciprocity. Proper selection of analog precoder/combiner not only suppresses large part of interference, but also ensures that less coordination is required for digital precoder/combiner design. We design analog precoder/combiner for each data stream in such a way that its signal strength is maximized; this strategy also minimizes large part of inter-stream interference that may arise due to the main lobe of analog beamformer. Then we design digital beamformer such that inter-stream interference is further mitigated, maximizing the overall weighted sum-rate of the network.
Shah Prashant Kumar, Joshi Krishna, Joshi Satya, Tölli Antti, Umebayashi Kenta
A4 Article in conference proceedings
Place of publication:
2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020
25 June 2020
P. K. Shah, K. Joshi, S. Joshi, A. Tolli and K. Umebayashi, “Direct Beamformer Estimation for Hybrid Architecture in mmWave Dynamic TDD System,” 2020 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), Seoul, Korea (South), 2020, pp. 1-6, doi: 10.1109/WCNCW48565.2020.9124904
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