基于两分量广义加权分数傅里叶变换的大规模MIMO波形设计

doi:10.11959/j.issn.1000-436x.2023226

Abstract

Abstract:

In order to overcome the drawback of conventional diversity technologies that sacrificing valuable communication resources such as data rate or bandwidth in massive multiple input multiple output (MIMO) systems, a double-component combined generalized weighted fractional Fourier transform (DCGWFRFT) based waveform design method was proposed.The concept of computational diversity was introduced, and the diversity performance was improved via moderate computational resources without requiring channel state information at the transmitter.The principle of computational diversity of DCGWFRFT based waveform was firstly analyzed, and a DCGWFRFT based waveform design and transform process, which could be adopted combined with existing diversity methods, was then proposed according to the principle.Theoretical analysis proves that the proposed waveform design and transform process can perfectly recover the original transmitted signal in noise-free case, and the power of error of proposed waveform is distributed more evenly than that of untransformed waveform in noisy case.Simulation results show that the performance of DCGWFRFT based waveform has an advantage of at least 1.7 dB in bit signal-to-noise ratio compared with untransformed waveform when bit error rate is 10^-3.

Key words: massive MIMO, diversity, DCGWFRFT, waveform design

CLC Number:

TN92

Xingjian LI, Zhiqun SONG, Yong LI, Lizhe LIU, Bin WANG, Chang WANG. Double-component combined generalized weighted fractional Fourier transform based waveform design for massive MIMO[J]. Journal on Communications, 2023, 44(12): 216-229.

Figures/Tables 17

θ₁-θ₀	θ₀
$\frac{π}{2}$	$θ_{0} \neq 2 k π$ ， $θ_{0} \neq - \frac{π}{2} + 2 k π$ ， $θ_{0} \neq - \frac{π}{4} + 2 k π$
$- \frac{π}{2}$	$θ_{0} \neq 2 k π$ ， $θ_{0} \neq \frac{π}{2} + 2 k π$ ， $θ_{0} \neq \frac{π}{4} + 2 k π$

References 33

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方法	计算复杂度
原始波形	O(MN ³)
DCGWFRFT波形	O(MN ³+2MN)
SVD	O(2MN ³)
SVD+DCGWFRFT	O(2MN ³+2MN)
GMD-VBLAST	O(2MN ³+(K₁+2)MN²)
GMD-VBLAST+DCGWFRFT	O(2MN ³+(K₂+2)MN²+2MN)

Double-component combined generalized weighted fractional Fourier transform based waveform design for massive MIMO

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