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The IEEE 802.16 standard, also known as WiMAX, has yet to prove its effectiveness when the end terminals are not static and free to move at vehicular speeds. High bit error rate caused by multipath fading at high vehicular speeds, is the key reason for low throughput at high speeds. Standard error control mechanisms like Transmission Control Protocol (TCP) and Forward Error Correction (FEC) have limited impact on the overall throughput at vehicular speeds. In this paper, the authors propose a proactive FEC scheme that adjusts the FEC code size based on the estimated bit error rate at various vehicular speeds. They show a mathematical model to estimate the bit error rate in WiMAX communication.
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