DFT structured codebook design with finite alphabet for high speed wireless communications

Authors:
Pengfei Xia;Su-Khiong Yong;Huaning Niu;Jisung Oh;Chiu Ngo
Affiliations:
Samsung Electronics, San Jose, CA;Samsung Electronics, San Jose, CA;Intel Corp., Santa Clara, CA;Samsung Electronics, Suwon, Kyungki-Do, Korea;Samsung Electronics, San Jose, CA
Venue:
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
Year:
2009

Citing 5
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Abstract

A low-complexity numerical codebook construction method is presented in this paper for limited feedback transmit beamforming systems. The so-constructed codebook takes a DFT matrix structure and achieves equal amplitude beamforming all the time. The codebooks are designed such that the selected row indices mimic the behavior of a difference set which, when exists, is able to achieve codebook optimality. Finite alphabet constraint on the codebook is further studied, where scalar quantization is further applied.