Performance of Transmit Beamforming Codebooks with Separate Amplitude and Phase Quantization

Author

Dowhuszko, Alexis ; Hamalainen, Jyri

Author_Institution

Dept. of Commun. & Networking, Aalto Univ., Aalto, Finland

Volume

22

Issue

7

fYear

2015

fDate

Jul-15

Firstpage

813

Lastpage

817

Abstract

A simple quantization scheme is proposed to adjust separately the amplitudes and phases of signals in a codebook-based Transmit Beamforming (TBF) scheme. The proposed quantization scheme is valid for both desired signal power maximization (egoistic TBF) and co-channel interference mitigation (altruistic TBF), and does not require an exhaustive search to find the optimal TBF vector. Performance results are presented when variable numbers of bits for amplitude and phase feedback resolutions are used for both egoistic and altruistic TBF schemes.

Keywords

array signal processing; cochannel interference; feedback; interference suppression; quantisation (signal); TBF vector; altruistic TBF schemes; amplitude resolutions; beamforming codebooks; cochannel interference mitigation; codebook-based transmit beamforming scheme; egoistic TBF; phase feedback resolutions; phase quantization; quantization scheme; separate amplitude; signal power maximization; Antennas; Array signal processing; Interchannel interference; Quantization (signal); Signal to noise ratio; Vectors; Codebook design; interference mitigation; limited feedback terms; separate quantization; transmit beamforming;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2014.2370762

Filename

6955807