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A method for increasing the receiver immunity to interference

机译:一种提高接收机抗干扰能力的方法

摘要

A method for adjusting the gain of a receive circuit, thereby improving a receiver's immunity to interference. The circuit has an LNA which amplifies the received signal (1702). The receive signal power is controlled by enabling or disabling the LNA in response to the measured received signal power (1704). The received power level is periodically compared to a threshold (1704). When the received power level is greater than the threshold, the LNA is disabled (1706). The LNA is re-enabled when the received power level is less than the threshold (1708), and there are no significant intermodulation components detected (1710). The intermodulation components are detected by briefly enabling the LNA and detecting the resultant change in the measured signal power (1710). If the detected change is more than a predetermined amount, then there are significant intermodulation components present, and the LNA is not re-enabled (1706). Otherwise, there are not significant intermodulation components present, and the LNA is re-enabled (1702).
机译:一种用于调整接收电路的增益,从而提高接收器的抗干扰能力的方法。该电路具有放大接收信号的LNA(1702)。响应于所测量的接收信号功率,通过启用或禁用LNA来控制接收信号功率(1704)。周期性地将接收到的功率水平与阈值进行比较(1704)。当接收到的功率电平大于阈值时,LNA被禁用(1706)。当接收到的功率电平小于阈值时重新启用LNA(1708),并且没有检测到明显的互调分量(1710)。通过短暂启用LNA并检测测量信号功率的结果变化来检测互调分量(1710)。如果检测到的变化大于预定量,则存在明显的互调分量,并且不重新启用LNA(1706)。否则,不存在明显的互调分量,并且重新启用LNA(1702)。

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