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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...
In this paper, we study the quantized feedback beamforming techniques presented in the IEEE 802.11n joint proposal. Specifically, we compare three different quantized feedback schemes (channel state information matrix feedback, non-compressed steering matrix feedback, and compressed steering matrix feedback) and evaluate their relative merits in terms of bit error ratio (BER) degradation and overhead...
This paper explores the feasibility of designing an outdoor cellular network based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, which was originally developed for wireless local area networks. Specifically, the performance of the 802.11 radio and medium access control (MAC) protocol in outdoor environments is investigated. For channels typical in cellular networks,...
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