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- W2137920087 abstract "An orthogonal frequency division multiplexing (OFDM) system suffers performance degradation when the length of the cyclic prefix (CP) is less than the channel impulse response. The root cause of this degradation is the inter-carrier interference (ICI) and inter-symbol interference (ISI) introduced by the excessive multipath delay. Generally, MIMO beamforming is helpful in mitigating such interference because it can spatially suppress some of the multipath. However, the effectiveness of this suppression is very limited. In this paper, we propose an ICI/ISIaware beamforming algorithm which explicitly takes into account the multipath characteristic of the channel. Optimal steering vectors are derived to maximize the signal-to-interference-plus-noise ratio (SINR). This technique not only achieves the beamforming benefit, but also significantly mitigates the ICI and ISI. We show, via simulations, that the proposed algorithm can dramatically reduce the block error rate, permitting good performance for channel delay profiles that would break conventional links. This is vitally important for the extension of indoor WLAN designs to outdoor uses." @default.
- W2137920087 created "2016-06-24" @default.
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- W2137920087 date "2009-03-01" @default.
- W2137920087 modified "2023-09-26" @default.
- W2137920087 title "ICI/ISI aware beamforming for MIMO-OFDM wireless system" @default.
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- W2137920087 doi "https://doi.org/10.1109/ciss.2009.5054699" @default.
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