Research of the time-domain channel prediction for adaptive OFDM systems
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TP98

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    Abstract:

    In this paper, a novel time-domain channel prediction technique for adaptive OFDM systems is introduced. The novel timedomain channel prediction technique utilizes the RQA to quantify and estimate the local predictability of each time-delay tap in the channel impulse response, and then based on the local predictability of each delay tap, we select those significant time-delay taps in the channel impulse response; finally, the joint echo state network ( JESN) is utilized to predict the channel state information in each significant time-delay tap. In the simulation part, the OFDM system based on the IEEE802. 11ah standard to evaluate the performance. The simulation results show that by the TSS-RQA, those significant time-delay taps in the channel impulse response are accurately selected. In addition, the JESN produces the sparse output weight matrix. Due to the oracle property, the improved prediction performance of the JESN is approximate to 91. 75%, compared to the basic echo state network.

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  • Received:
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  • Online: February 27,2023
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