NDLI: An easy-to-implement dual codebook for multiuser MIMO systems

Content Provider	IEEE Xplore Digital Library
Author	Yue Ma Lihua Li Jin Jin Yucang Yang
Copyright Year	2013
Description	Author affiliation: Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China (Yue Ma; Lihua Li; Jin Jin; Yucang Yang)
Abstract	The complex multiplication between data streams and codebook when precoding at the transmitter always needs a lot of computing units in hardware implementation. In this paper, we first propose a binary-based codebook, in which all elements in the precoding matrix are expressed in power of 2. The proposed method can reduce practical engineering implementation complexity significantly, since the multiplication between the data symbol and the element of the codebook matrix can be regarded as a simple binary shift of the transmission data. This approach can be applied in various existing codebook design methods and we also consider on the multi-user case. But the operation is bound to bring in some accuracy loss because we hardly obtain the optimal codebook right with expression of power of 2. Then we propose a novel dual-codebook scheme which is easy to implement and can make up the performance penalty. The simulation results reveal that the proposed scheme outperforms 3GPP R10 LTE-A DFT (discrete Fourier transform) codebook and ease the burden of implementation cost.
Sponsorship	IEEE Commun. Soc.
Starting Page	709
Ending Page	712
File Size	413203
Page Count	4
File Format	PDF
ISBN	9781467331319
e-ISBN	9781467331333
DOI	10.1109/CCNC.2013.6488531
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vectors MIMO Algorithm design and analysis Hardware Interference Discrete Fourier transforms Simulation LTE-A DFT codebook codebook design binary-based hardware resource
Content Type	Text
Resource Type	Article

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