Power Allocation Based on Truncated Squared Norm of Channel Equalization Coefficients for TDD LTE-A Uplink Systems

Author

Zhou, En ; Shi, Jinglin ; Li, Yonghui ; Vucetic, Branka ; Huang, Xiaojing ; Guo, Y. Jay

Author_Institution

Wireless Technol. Res. Center, Beijing, China

fYear

2010

fDate

18-21 April 2010

Firstpage

1

Lastpage

5

Abstract

The power allocation problem is addressed for time division duplex (TDD) LTE-A uplink systems in this paper. Due to the IDFT de-spreading in LTE-A uplink, the channel frequency responses in an IDFT de-spreading block will be tangled together. After analyzing the equivalent signal to interference plus noise ratio (SINR) in the time domain, a Truncated Squared norm of channel equalization Coefficients based Power Allocation (TSCPA) method is proposed to improve the final SINR performance after the IDFT de-spreading block. The proposed TSC-PA algorithm is verified for the clustered DFT-s-OFDM system in eigen-model block diagonalization multi-user MIMO uplink environment by simulations. The results demonstrate that the proposed TSC-PA algorithm can further improve the system block error rate (BLER) performance by selecting a proper truncation threshold.

Keywords

Bit error rate; Clustering algorithms; Demodulation; Discrete Fourier transforms; Interference constraints; MIMO; OFDM; Peak to average power ratio; Signal to noise ratio; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2010 IEEE

Conference_Location

Sydney, Australia

ISSN

1525-3511

Print_ISBN

978-1-4244-6396-1

Type

conf

DOI

10.1109/WCNC.2010.5506250

Filename

5506250