A Downlink Grouping Transmission Scheme for TDD OFDM System

Author

Xiaohui, Yang ; Dandan, He ; Shuang, Li ; Lihua, Li ; Ping, Zhang

Author_Institution

Wireless Technol. Innovation Inst., Beijing Univ. of Posts & Telecommun.

Volume

2

fYear

2006

fDate

25-28 June 2006

Firstpage

978

Lastpage

982

Abstract

A downlink grouping transmission scheme has been proposed for TDD OFDM system. The coded bits are separated into several branches according to their priority, and then the results are adaptively allocated and transmitted on the 2-dimension time-frequency channel blocks, which are also separated into different groups according to their power. Simulation results show that this scheme can significantly improve the performance of TDD OFDM system. Meanwhile, the grouping modulation and downlink time-frequency channel prediction can further enhance the grouping transmission

Keywords

OFDM modulation; channel estimation; time division multiplexing; time-frequency analysis; wireless channels; 2-dimension time-frequency channel blocks; TDD OFDM system; coded bits; downlink grouping transmission scheme; modulation; orthogonal frequency division multiplexing; time division duplexing; Adaptive systems; Channel coding; Channel state information; Downlink; Error correction; Feedback; Modulation coding; OFDM modulation; System performance; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems Proceedings, 2006 International Conference on

Conference_Location

Guilin

Print_ISBN

0-7803-9584-0

Electronic_ISBN

0-7803-9585-9

Type

conf

DOI

10.1109/ICCCAS.2006.284813

Filename

4064054