Adaptive thu phát không dây P6

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Adaptive thu phát không dây P6

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Mobile communications channelstypically exhibit time-variant channel quality fluctuations [ 131 and hence conventional fixed-mode modems suffer from bursts of transmission errors, even if the system was designed to provide a high link margin. As argued throughout this monograph, an efficient approach of mitigating these detrimental effects is to adaptively adjust the transmission format based on the near-instantaneous channel quality information perceived by the receiver, which is fed back to the transmitter with the aid of a feedback channel [ 151....

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