Title :
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.
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;
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
DOI :
10.1109/ICCCAS.2006.284813
