Orthogonal Time Sequency Multiplexing (OTSM) is a low-complexity modulation method suitable for high-speed mobile scenarios. However, a single waveform design method is difficult to meet diverse application requirements and performance demands. Therefore, on basis of Weighted FRactional Fourier Transform (WFRFT), a Weighted FRactional Walsh-Hadamard Transform (WFRWHT) is proposed and an integrated WFRFT-WFRWHT-OTSM waveform framework based on multidimensional extensions is put forward. Through the flexible configuration of two-dimensional parameters, this framework can be degraded to different waveforms such as OTSM, orthogonal time-frequency-space, hybrid carrier, orthogonal frequency division multiplexing and single carrier. In addition, Bit Error Rate (BER) and Peak-to-Average Power Ratio (PAPR) performances of the integrated WFRFT-WFRWHT-OTSM framework over delay-Doppler channels are studied with Gauss-Seidel (GS) iteration equalization. Simulation results show that the proposed framework achieves better BER and PAPR performances through changing the order of WFRFT and WFRWHT over different delay-Doppler channels.
关键词
加权分数沃尔什变换/加权分数傅里叶变换/正交时序复用/正交频分复用/高斯-赛德尔迭代均衡
Key words
Weighted FRactional Walsh-Hadamard Transform (WFRWHT)/Weighted FRactional Fourier Transform (WFRFT)/Orthogonal Time Sequency Multiplexing (OTSM)/Orthogonal Time Frequency Space (OTFS)/Gauss-Seidel (GS) iterative equalization
维普
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