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http://dx.doi.org/10.7840/KICS.2011.36C.2.86

Performance Analysis of MlMO-OFDMA System Combined with Adaptive Beamforming  

Chung, Jae-Ho (한양대학교 전자컴퓨터통신공학과 통신신호처리 연구실)
Choi, Seung-Won (한양대학교 전자컴퓨터통신공학과 통신신호처리 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.2C, 2011 , pp. 86-92 More about this Journal
Abstract
This paper details the downlink performance analysis of an multiple antennas system that combines adaptive beamforming and spatial multiplexing (SM) Multiple Input Multiple Output (MIMO). The combination of MIMO signal processing with adaptive beamforming is applied to WiBro, the South Korean Orthogonal Frequency Division Multiple Access (OFDMA) system that follows the IEEE 802.16e standard. Performance analysis is based on the results of experiments and simulations obtained from a fixed-point simulation testbed. Simulations demonstrate that the MIMO Beamforming OFDMA system improves the required signal to noise ratio (SNR) over the conventional MIMO OFDMA system by 3 dB (QPSK) / 2.5 dB (16-QAM) for the frame error rate (FER) of 1% in the WiBro signal environments. From the implementation of the fixed-point simulation testbed and its experimental results, we verify the feasibility of the MIMO Beamforming technology for realizing a practical WiBro base station.
Keywords
MIMO; Adaptibve Beamforming; OFDMA; 802.16e;
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