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A Robust Adaptive MIMO-OFDM System Over Multipath Transmission Channels  

Kim, Hyun-Dong (삼성전자 통신연구소)
Choe, Sang-Ho (가톨릭대학교 정보통신전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.7A, 2007 , pp. 762-769 More about this Journal
Abstract
Adaptive MIMO-OFDM (Orthogonal Frequency Division Multiplexing) system adaptively changes modulation scheme depending on feedback channel state information (CSI). The CSI feedback channel which is the reverse link channel has multiple symbol delays including propagation delay, processing delay, frame delay, etc. The unreliable CSI due to feedback delay degrades adaptive modulation system performance. This paper compares the MSE and data capacity with respect to delay and channel signal to noise ratio for the two multi-step channel prediction schemes, CTSBP and BTSBP, such that robust adaptive SISO-OFDM/MIMO-OFDM is designed over severe mobile multipath channel conditions. This paper presents an interpolation method to reduce feedback overhead for adaptive MIMO-OFDM and shows MSE with respect to interpolation interval.
Keywords
Adaptive MIMO-OFDM; CSI; Multi-Step Prediction; Linear Interpolation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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