Simultaneous and Unambiguous Measurement for Doppler Frequency Shift and Angle of Arrival of a Microwave Signal with High Precision

IF 2.3 4区物理与天体物理 Q2 OPTICS Fiber and Integrated Optics Pub Date : 2022-07-04 DOI:10.1080/01468030.2022.2145530

Jing Gao, J. Ma

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Abstract

ABSTRACT A photonic scheme for simultaneously measuring both the Doppler frequency shift (DFS) and angle of arrival (AOA) of a microwave signal based on a polarization division multiplexing dual-parallel Mach-Zehnder modulator (PDM-DPMZM) is proposed. In our scheme, the single-sideband (SSB) modulated signals via PDM-DPMZM are divided into two branches, and so two ac power-phase mapping functions with higher slopes are formed by different polarization processing. Since one ac power-phase curve serves as a calibration line, the system can realize unambiguous AOA measurement with the phase range of −180°~180°. The value and direction of DFS can only be determined using an electrical spectrum analyzer (ESA). In addition, the scheme has a larger operating bandwidth because no filter is required. Simulation results show that the AOA from −83.92° to 83.92° is measured with an error of ±0.9°, and the DFS measurement within ±100 KHz is realized with an error less than ±5 × 10−3 Hz. The characteristics of low error, high precision, and wide bandwidth are important for microwave signal detection.

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高精度微波信号多普勒频移和到达角的同时准确测量

摘要提出了一种基于偏振分复用双并行马赫-曾德尔调制器(PDM-DPMZM)的微波信号多普勒频移(DFS)和到达角(AOA)同时测量的光子方案。在我们的方案中，通过PDM-DPMZM将单边带(SSB)调制信号分成两个支路，从而通过不同的极化处理形成两个斜率更高的交流功率相位映射函数。采用一条交流功率-相位曲线作为校准线，可实现相位范围为−180°~180°的AOA测量。DFS的值和方向只能使用电频谱分析仪(ESA)来确定。此外，由于不需要滤波器，该方案具有更大的工作带宽。仿真结果表明，测量了−83.92°~ 83.92°范围内的AOA，误差为±0.9°，实现了±100 KHz范围内的DFS测量，误差小于±5 × 10−3 Hz。低误差、高精度和宽带宽是微波信号检测的重要特点。

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来源期刊

Fiber and Integrated Optics 物理-光学

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Fiber and Integrated Optics , now incorporating the International Journal of Optoelectronics, is an international bimonthly journal that disseminates significant developments and in-depth surveys in the fields of fiber and integrated optics. The journal is unique in bridging the major disciplines relevant to optical fibers and electro-optical devices. This results in a balanced presentation of basic research, systems applications, and economics. For more than a decade, Fiber and Integrated Optics has been a valuable forum for scientists, engineers, manufacturers, and the business community to exchange and discuss techno-economic advances in the field.