Compensation Module Design for Overlapping Band in Band-Interleaved Data Acquisition Systems Based on Hybrid Particle Swarm Optimization Algorithm
Compensation Module Design for Overlapping Band in Band-Interleaved Data Acquisition Systems Based on Hybrid Particle Swarm Optimization Algorithm
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DOI：
10.1109/access.2020.3027310
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发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Yu Zhao;P. Ye;Jie Meng;Kuojun Yang;Jian Gao;Zhixiang Pan;Wuhuang Huang;Jinpeng Song;Xuefeng Dai
中科院分区：
文献类型：
--
作者：
Yu Zhao;P. Ye;Jie Meng;Kuojun Yang;Jian Gao;Zhixiang Pan;Wuhuang Huang;Jinpeng Song;Xuefeng Dai
频带交错数据采集系统（BI-DAS）是一种很有吸引力的结构，以提高采集系统的带宽。然而，BI-DAS中的频谱分析滤波器的非理想特性导致两个相邻频率子带之间的频带重叠。重叠频带中的两个子带之间的相位未对准（PM）可能导致当子带的信号被合并时那些信号彼此抵消或部分抵消。本文提出了一种基于数字全通滤波器（APF）的补偿模块，用于补偿BI-DAS中重叠频段的PM。在此基础上，提出了一种沿着Levenberg-Marquardt（LM）算法的混合粒子群优化（PSO）算法来设计补偿模块的系数。文中提出的补偿模块和相应的补偿方法在一个采样率为20 Gsps、带宽为5.5GHz的双向数据采集系统中得到了验证。实验结果表明，该补偿模块能够有效地补偿重叠带内子带间的相位差。提出的混合PSO-LM（HPSOLM）算法结合了粒子群算法固有的灵活性和可靠性与LM算法的快速收敛性和精度。与传统的粒子群优化方法相比，该方法能够有效地设计出具有稳定性的有源滤波器补偿模块，且计算时间短，补偿效果好。
The band interleaved data acquisition system (BI-DAS) is an attractive structure to improve the bandwidth of the acquisition system. However, the non-ideal characteristic of the spectrum analysis filter in BI-DAS results in an overlapping frequency band between two adjacent frequency sub-bands. Phase misalignment (PM) between two sub-bands in the overlapping band may cause those signals canceled or partially canceled to each other when sub-bands’ signal are merged. In this paper, a compensation module with a digital all-pass filter (APF) is proposed for the PM of the overlapping bands in BI-DASs. Based on this compensation module, a hybrid Particle Swarm Optimization (PSO) algorithm, along with the Levenberg-Marquardt (LM) algorithm is proposed to design coefficients of the compensation module. The compensation module and corresponding method proposed in this paper are verified in a BI-DAS with 20Gsps sampling rate and 5.5GHz bandwidth. The experimental results show that the proposed compensation module can effectively compensate the PM between the sub-bands in the overlapping band. The proposed hybrid PSO-LM (HPSOLM) algorithm combines the flexibility and reliability inherent in the PSO with the fast convergence and precision of the LM algorithm. It can effectively design the compensation module with stable APF while consuming less time and obtaining better compensation results than the conventional PSO method.