Channel Estimation for UFMC System Based on J-SAWOMP Algorithm

doi:10.12068/j.issn.1005-3026.2025.20230334

Abstract

Abstract:

Universal filtered multi-carrier （UFMC） is a multi-carrier modulation technology for 5G communication systems. In order to verify the advantages of the UFMC system and further improve the channel estimation effect， an adaptive orthogonal matching pursuit algorithm （J-SAWOMP） based on Jaccard similarity criterion is proposed， which uses the Jaccard similarity metric criterion to calculate the similarity coefficient between atoms， and optimizes the screening method of matching atoms， and selects the best atoms by using the weak threshold selection method. Finally， the backtracking idea is used to further select the atoms with better correlation to improve the accuracy of signal reconstruction. Experimental results show that compared with the classical match-chase algorithm， the J-SAWOMP algorithm has better channel estimation performance under the UFMC system.

Key words: Jaccard similarity, matching pursuit, channel estimation, universal filtered multi-carrier（UFMC）, adaptive

CLC Number:

TN 911.7

Ce JI, Si-yu ZHANG. Channel Estimation for UFMC System Based on J-SAWOMP Algorithm[J]. Journal of Northeastern University(Natural Science), 2025, 46(4): 8-15.

Figures/Tables 11

Fig.1 UFMC system model

Fig.2 Flow chart of J-SAWOMP algorithm

Fig.3 Signal recovery based on J-SAWOMP algorithm under different α

Fig.4 Signal recovery under α of 0.1, 0.5, and 0.7

Fig.5 Residual comparison of 6 algorithms under different sparsity K

Fig.6 Residual comparison of 5 algorithms under different sparsity K

Fig.7 Runtime comparison of 5 algorithms under different sparsity K

Table 1 UFMC simulation environment

参数名称	数值
子载波数	20
子载波间隔	10
子频带数/ MHz	16
符号调制方式	16QAM
导频数	8
导频分布图案	菱形图案
滤波器	切比雪夫滤波器

Fig.8 MSE performance comparison of 3 algorithms under UFMC system

Fig.9 BER performance comparison of 3 algorithms under UFMC system

Fig.10 Runtime comparison of 3 algorithms under UFMC system

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