Automatic gain control method of digital communication receiver

Abstract

The invention relates to the field of electronic communication, and discloses an automatic gain control method of a digital communication receiver, which performs gain adjustment by jointly utilizingsaturation, amplitude and signal power of an ADC output signal of the receiver. Firstly, the access gain of a radio frequency or analog front end is set to be the maximum value, and when ADC output signal power is larger than a preset threshold, the access gain of the radio frequency or analog front end is correspondingly reduced according to ADC output signal saturation; secondly, the digital gain and the access gain of the radio frequency or analog front end are adjusted according to the amplitude and the power of the ADC output signal, so that the power of the ADC output signal is within anexpected range; and finally, the amplitude and the power of the ADC output signal are tracked until a gain locking indication signal of the digital baseband receiver is received, and at the moment, the access gain of the radio frequency or analog front end remains unchanged. Simulation shows that the automatic gain control method is high in convergence speed and can be suitable for complex wiredor wireless communication scenes.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to an automatic gain control method of a digital communication receiver. Background technique [0002] Communication technology is one of the fastest-growing technological fields in recent decades. The development from analog communication to modern digital communication has greatly improved the convenience of information transmission and communication in people's life and work. Communication technologies such as cellular communication, wireless local area network, and Bluetooth are constantly evolving and developing to adapt to different application scenarios, and have become standard configurations for mobile phones and mobile terminals. In these wireless communication systems, the distance between the transmitter and the receiver is not fixed, and may change slowly, resulting in the change of the power of the signal received by the receiver, requiring the receiver of the d...

AI Technical Summary

Problems solved by technology

In these cases, the RF channel gain is only calculated based on the power of the ADC output signal, which requires multiple adjustments, and the gain convergence speed is slow, making it difficult to apply to communication systems that require short-term and fast ADC gain adjustments.

Images