A Test Bench for Measuring the Sensitivity Threshold of FM Receivers in the Presence of Interference Through Direct Injection of the Radio Signal

Abdivall Maouloud, M. Klingler, P. Besnier
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引用次数: 3

Abstract

Evaluating the quality of radio reception is a crucial step in the production process of a vehicle. To evaluate radio reception, several parameters come into play. The radio signal depends on the nature of the electromagnetic propagation channel, the characteristics of the antennas and on the electronic reception chain. The quality of reception is also potentially affected by the interference signals generated at the RF input of the car receiver by the on-board electronics. However, current measurement methods of radio reception quality do not link these interference signals to the radio signal whose reception may be affected or not, according to the nature of interferences. This communication presents an original test bench allowing the evaluation of the quality of radio reception of a vehicle in a semi-anechoic chamber. This test bench constitutes an essential building block of a global methodological process. Its objective is to measure the sensitivity threshold of the radio reception chain (in the AM/FM/DAB bands) of the vehicle and to evaluate the evolution of this threshold as a function of the interference generated by the various components of the vehicle. We have set up two methods to carry out this experiment: injecting the radio signal directly at the input of the radio (conducted mode) and injecting the radio signal using an antenna (radiated mode). This article focuses on the conducted mode and describes the corresponding test bench. Some measurement examples are performed and discussed in the FM band.
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一种直接注入无线电信号测量调频接收机在干扰条件下灵敏度阈值的试验台
无线电接收质量的评估是车辆生产过程中至关重要的一步。为了评估无线电接收情况,需要考虑几个参数。无线电信号取决于电磁传播信道的性质、天线的特性和电子接收链。接收质量还可能受到车载电子设备在车载接收器射频输入处产生的干扰信号的影响。然而,目前的无线电接收质量测量方法并没有根据干扰的性质,将这些干扰信号与可能影响或不影响接收的无线电信号联系起来。本通信提出了一个原始测试台,允许在半消声室中评估车辆的无线电接收质量。这个测试台构成了全局方法论过程的基本构建块。其目的是测量车辆无线电接收链(AM/FM/DAB频段)的灵敏度阈值,并评估该阈值作为车辆各部件产生的干扰的函数的演变。我们建立了两种方法来进行实验:直接在无线电输入处注入无线电信号(传导模式)和通过天线注入无线电信号(辐射模式)。本文重点介绍了其传导模式,并介绍了相应的试验台。在调频波段进行了一些测量实例并进行了讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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