We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Improved Wideband Precoding with Arbitrary Subcarrier Grouping in MIMO-OFDM Systems.
- Authors
Hang Long; Kyeong Jin Kim; Wei Xiang; Shanshan Shen; Kan Zheng; Wenbo Wang
- Abstract
Precoding in the multiple-input multiple-output orthogonal frequency division multiplexing system is investigated. In conventional wideband precoding (WBP), only one precoder, obtained from the decomposition of the subcarrier independent channel matrix, is used for all subcarriers. With an investigation of the relationship between the subcarrier independent channel matrix and the temporal/frequency channels, an improved WBP scheme is proposed for practical scenarios in which a part of subcarriers are allocated to a user. The improved WBP scheme is a generalized scheme of which narrow-band precoding and conventional WBP schemes are special modes. Simulation results demonstrate that the improved WBP scheme almost achieves the optimum performance of a single precoder and outperforms the conventional WBP scheme in terms of the bit error ratio and ergodic capacity with slight complexity increase. The largest advantage of the improved WBP scheme on signal-tonoise ratio in simulation results is over 2.1 dB.
- Subjects
MIMO systems; ORTHOGONAL frequency division multiplexing; SIMULATION methods &; models; BIT error rate; SIGNAL-to-noise ratio; BEAMFORMING; BROADBAND communication systems
- Publication
ETRI Journal, 2012, Vol 34, Issue 1, p9
- ISSN
1225-6463
- Publication type
Article
- DOI
10.4218/etrij.12.0111.0050