In this Letter,we have experimentally verified a low-complexity subcarrier pairwise-averaging(SPA)-enhanced channel estimation(CE)method for small-size fast Fourier transform(FFT)non-Hermitian symmetric orthogonal fre...In this Letter,we have experimentally verified a low-complexity subcarrier pairwise-averaging(SPA)-enhanced channel estimation(CE)method for small-size fast Fourier transform(FFT)non-Hermitian symmetric orthogonal frequency-division multiplexing(NHS-OFDM)transceivers.Compared with intra-symbol frequency averaging(ISFA),more than 20% look-up tables and 10%logic power consumption can be saved.The least-square(LS),ISFA,and SPA CE methods are compared by offline and real-time digital signal processing approaches.The results show that the receiver sensitivity of the SPA NHS-OFDM transmission system with 64/128-point FFT can be improved by more than 1 dB at the bit error rate of 3.8 ×10^(-3) compared to the LS.展开更多
基金This work was supported in part by the National Natural Science Foundation of China(No.61805079)the Hunan Provincial Natural Science Foundation(No.2020JJ4433)the Hunan Province College Students Research Learning and Innovative Experiment Project,China(No.S202010542058).
文摘In this Letter,we have experimentally verified a low-complexity subcarrier pairwise-averaging(SPA)-enhanced channel estimation(CE)method for small-size fast Fourier transform(FFT)non-Hermitian symmetric orthogonal frequency-division multiplexing(NHS-OFDM)transceivers.Compared with intra-symbol frequency averaging(ISFA),more than 20% look-up tables and 10%logic power consumption can be saved.The least-square(LS),ISFA,and SPA CE methods are compared by offline and real-time digital signal processing approaches.The results show that the receiver sensitivity of the SPA NHS-OFDM transmission system with 64/128-point FFT can be improved by more than 1 dB at the bit error rate of 3.8 ×10^(-3) compared to the LS.
