基于WFRFT频谱预编码的GFDM系统性能优化方法

doi:10.11959/j.issn.1000-436x.2023167

通信学报 ›› 2023, Vol. 44 ›› Issue (10): 85-93.doi: 10.11959/j.issn.1000-436x.2023167

• 学术论文 • 上一篇

基于WFRFT频谱预编码的GFDM系统性能优化方法

王震铎¹, 王朝晖¹, 张若愚²

¹ 哈尔滨工程大学信息与通信工程学院，黑龙江哈尔滨 150001
² 南京理工大学近程射频感知芯片与微系统教育部重点实验室，江苏南京 210094

修回日期:2023-08-07 出版日期:2023-10-01 发布日期:2023-10-01
作者简介:王震铎（1989− ），男，黑龙江哈尔滨人，博士，哈尔滨工程大学副教授，主要研究方向为5G波形设计理论与关键技术、变换域通信系统理论、保密数据链理论与关键技术等
王朝晖（1998− ），男，山西大同人，哈尔滨工程大学硕士生，主要研究方向为GFDM波形设计理论与关键技术
张若愚（1992− ），男，河南三门峡人，博士，南京理工大学副研究员，主要研究方向为大规模MIMO、通信感知一体化等
基金资助:
国家自然科学基金资助项目(62001138);国家自然科学基金资助项目(62201266);黑龙江省自然科学基金资助项目(LH2021F009);江苏省自然科学基金资助项目(BK20210335);中国博士后科学基金资助项目(2020M670885)

Performance optimization method of GFDM system based on WFRFT spectral precoding

Zhenduo WANG¹, Zhaohui WANG¹, Ruoyu ZHANG²

¹ School of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
² Key Laboratory of Near-Range RF Sensing ICs ＆Microsystems (Nanjing University of Science and Technology), Ministry of Education, Nanjing 210094, China

Revised:2023-08-07 Online:2023-10-01 Published:2023-10-01
Supported by:
The National Natural Science Foundation of China(62001138);The National Natural Science Foundation of China(62201266);The Natural Science Foundation of Heilongjiang Province(LH2021F009);The Natural Science Foundation of Jiangsu Province(BK20210335);China Postdoctoral Science Foundation Funded Project(2020M670885)

摘要/Abstract

摘要：

针对广义频分复用（GFDM）系统在实际应用中仍然面临着带外功率泄漏和峰均功率比较高的问题，通过深入分析频谱预编码GFDM系统功率谱特性，构建了一种基于加权分数傅里叶变换（WFRFT）的通用频谱预编码（SP）框架，提出了二维参数可调的WFRFT-SP-GFDM系统。通过参数的灵活配置，可使该WFRFT频谱预编码器逼近加权分数傅里叶变换矩阵，实现对带外功率和峰均功率比的精确控制。仿真结果表明，与 GFDM 和WFRFT-GFDM波形相比，WFRFT-SP-GFDM波形可以有效抑制系统带外功率泄漏，同时保持较好的峰均功率比和误码率性能。

关键词: 广义频分复用, 加权分数傅里叶变换, 频谱预编码, 带外功率, 峰均功率比

Abstract:

Generalized frequency division multiplexing (GFDM) system always faces challenges related to out-of-band (OOB) power leakage and a high peak-to-average power ratio (PAPR).Through an in-depth analysis of power spectrum characteristics of spectrally precoded GFDM systems, a universal spectral precoding (SP) framework based on the weighted fractional Fourier transform (WFRFT) was established.A two-dimensional parameter-adjustable WFRFT-SP-GFDM system was introduced.By flexibly configuring the parameters, the WFRFT spectral precoder could be made to approximate the weighted fractional Fourier transform matrix, achieve precise control over OOB power and PAPR.Simulation results indicate that, when compared to conventional GFDM and WFRFT-GFDM waveforms, the WFRFT-SP-GFDM waveform effectively suppresses OOB power leakage, while maintaining favorable PAPR and bit error rate (BER) performance.

Key words: GFDM, WFRFT, spectral precoding, OOB, PAPR

中图分类号:

TN911

王震铎, 王朝晖, 张若愚. 基于WFRFT频谱预编码的GFDM系统性能优化方法[J]. 通信学报, 2023, 44(10): 85-93.

Zhenduo WANG, Zhaohui WANG, Ruoyu ZHANG. Performance optimization method of GFDM system based on WFRFT spectral precoding[J]. Journal on Communications, 2023, 44(10): 85-93.

图/表 9

图1

表1

WFRFT-SP-GFDM参数等效关系"

预编码参数	矩阵演化	演化结果
J = 0,α=0	$P = I$	GFDM
J = 0,0＜α＜1	$P = W_{α}$	WFRFT-GFDM
J = 0,α=1	$P = F$	DFT-GFDM
J ≠ 0,α=0	$P = U$	SP-GFDM
J ≠ 0,0＜α＜1	$P = U Q_{α}$	WFRFT-SP-GFDM
J ≠ 0,α=1	$P = U F$	DFT-SP-GFDM

表1

表2

图2

图3

图4

图5

图6

图7

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参数名称	参数取值
子载波数	128,256
子符号数	5
原型滤波器	升余弦滤波器
滚降因子	0.5
调制方式	4-QAM
参数J	1,2,3,4,5,6,7,8
参数α	0.6,0.8

基于WFRFT频谱预编码的GFDM系统性能优化方法

Performance optimization method of GFDM system based on WFRFT spectral precoding

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