基于VSCBOMP算法的FBMC/OQAM系统信道估计

doi:10.12305/j.issn.1001-506X.2023.04.28

系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (4): 1193-1199.doi: 10.12305/j.issn.1001-506X.2023.04.28

• 通信与网络 • 上一篇

基于VSCBOMP算法的FBMC/OQAM系统信道估计

季策¹^,², 田博彦¹, 耿蓉¹, 李伯群³^,*

1. 东北大学计算机科学与工程学院, 辽宁沈阳 110169
2. 东北大学医学影像智能计算教育部重点实验室，辽宁沈阳 110169
3. 辽宁科技大学电子与信息工程学院, 辽宁鞍山 114051

收稿日期:2021-11-30 出版日期:2023-03-29 发布日期:2023-03-28
通讯作者: 李伯群
作者简介:季策(1969—), 女, 副教授, 博士, 主要研究方向为OFDM关键技术研究、盲信号处理
田博彦(1997—), 男, 硕士研究生, 主要研究方向为FBMC/OQAM系统信道估计技术
耿蓉(1979—), 女, 副教授, 博士, 主要研究方向为无线网络、空间网络、网络安全及安全路由
李伯群(1970—), 男, 教授, 博士, 主要研究方向为复杂工业过程建模、智能控制及深度学习

FBMC/OQAM system channel estimation based on VSCBOMP algorithm

Ce JI¹^,², Boyan TIAN¹, Rong GENG¹, Boqun LI³^,*

1. School of Computer Science and Engineering, Northeastern University, Shenyang 110169, China
2. Key Laboratory of Intelligent Computing in Medical Image, Ministry of Education, Northeastern University, Shenyang 110169, China
3. School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan 114051, China

Received:2021-11-30 Online:2023-03-29 Published:2023-03-28
Contact: Boqun LI

摘要/Abstract

摘要：

偏移正交调制的滤波器组多载波(filter bank multi-carrier/offset quadrature amplitude modulation, FBMC/OQAM)相比于传统正交频分复用(orthogonal frequency division multiplexing, OFDM)系统具有误码率低、频谱利用率高等优点, 但目前较少有采用压缩感知方法来进行FBMC/OQAM的信道估计的研究。针对FBMC/OQAM系统提出基于变步长条件回溯正交匹配追踪(variable step-size conditional backtracking orthogonal matching pursuit, VSCBOMP)的信道估计算法。该算法在每次迭代过程中选择多个原子, 当支撑集充满之后, 利用回溯剔除相关性较差的原子。同时, 加入了变步长的思想, 提高了运算效率。在随后的稀疏随机信号恢复实验及FBMC/OQAM系统信道估计仿真实验中验证了该算法。仿真结果表明, 该算法比传统的正交匹配追踪类算法运行时间短, 亦能获得更高的估计精度。

关键词: 偏移正交调制的滤波器组多载波, 信道估计, 压缩感知, 变步长, 回溯

Abstract:

Compared with conventional orthogonal frequency division multiplexing (OFDM) systems, filter bank multi-carrier/offset quadrature amplitude modulation (FBMC/OQAM) has the advantages of low bit error rate and high spectrum efficiency, but there are few studies on the use of compressive sensing in order to estimate FBMC/OQAM channels recently. A channel estimation algorithm named variable step-size conditional backtracking orthogonal matching pursuit (VSCBOMP) is proposed for FBMC/OQAM systems. This algorithm selects several atoms in each iteration and backtracks when the support set is full in order to get rid of atoms with poor correlation. The idea of variable step-size is added simultaneously to improve the operation efficiency. The algorithm is then simulated in sparse random signals recovery experiment and channel estimation in FBMC/OQAM systems. The simulation result proves that the algorithm has shorter running time and higher estimation accuracy than conventional orthogonal matching pursuit algorithms.

Key words: filter bank multi-carrier/offset quadrature amplitude modulation (FBMC/OQAM), channel estimation, compressive sensing, variable step-size, backtracking

中图分类号:

TN911.7

季策, 田博彦, 耿蓉, 李伯群. 基于VSCBOMP算法的FBMC/OQAM系统信道估计[J]. 系统工程与电子技术, 2023, 45(4): 1193-1199.

Ce JI, Boyan TIAN, Rong GENG, Boqun LI. FBMC/OQAM system channel estimation based on VSCBOMP algorithm[J]. Systems Engineering and Electronics, 2023, 45(4): 1193-1199.

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参考文献 15

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参数	数值
初始步长	K/2
阈值1	10^－1
阈值2	10^－4
阈值3	10^－14

参数	数值
子载波数	12
FBMC符号数	30
子载波间隔/MHz	15
中心频率/MHz	300
调制方式	16QAM
导频数量	8
导频频域间隔	6
导频时域间隔	8
导频分布图案	矩形
信道衰落类型	平坦衰落

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基于VSCBOMP算法的FBMC/OQAM系统信道估计

FBMC/OQAM system channel estimation based on VSCBOMP algorithm

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