Gain control method, device and circuit based on receiver and receiver

Abstract

The application discloses a gain control method, device and circuit based on a receiver and a terminal. The method comprises the following steps: performing gain control processing on an input signalaccording to a predetermined gain parameter to obtain a to-be-processed signal after gain adjustment; carrying out frequency mixing processing on the to-be-processed signal to obtain a corresponding carrier I-path signal and a corresponding carrier Q-path signal; respectively performing analog-to-digital conversion processing on the carrier I-path signal and the carrier Q-path signal to obtain a digital I-path signal and a digital Q-path signal; performing peak detection processing on the digital I-path signal and the digital Q-path signal, and determining whether gain parameters need to be adjusted or not according to a peak detection processing result; and if not, performing gain fine adjustment control on the digital I-path signal and the digital Q-path signal. According to the embodiment of the application, through twice gain control processing, the problem of poor signal stability after gain processing caused by multipath fading or receiver distance and the like of signals in theprior art is solved.

Description

technical field

[0001] The present application relates to the field of communication technology, in particular to a receiver-based gain control method, device, circuit and receiver. Background technique

[0002] In the process of communication signal propagation in space, due to multipath fading, receiver distance changes and other reasons, the signal strength will cause signal amplitude instability, and the signal dynamic range exceeds the dynamic range that can be processed by digital baseband signal processing and other changes. This change will cause problems such as signal loss and performance degradation in the subsequent digital baseband signal processing (such as demodulation processing). Therefore, gain control is needed to solve such problems.

[0003] The relevant receiver performs gain control only once, and the gain control is performed according to a fixedly configured gain parameter. Therefore, there is a problem that the adaptive gain control cannot be perf...

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