Gain-adjustable anti-interference broadband receiver

Abstract

The invention discloses a gain-adjustable anti-interference broadband receiver which comprises an automatic gain adjusting mode and a manual gain adjusting mode. Automatic control of a main control module on a numerical control attenuator and a variable gain amplifier is the automatic gain adjusting process of the receiver. The manual adjustment of the digital control attenuator and the variable gain amplifier by the external control module is the process of manually adjusting the gain of the receiver, and the size of the gain of the whole receiver is adjustable through independent automatic adjustment of the gain, or independent manual adjustment of the gain, or the matching of the automatic adjustment of the gain and the manual adjustment of the gain. When in use, gain adjustment can be carried out according to actual requirements, and the receiver has the characteristics of adjustable gain, interference resistance and large dynamic range, and can meet the requirements of performance indexes of the receiver in a complex electromagnetic environment.

Description

technical field [0001] The invention relates to the technical field of receivers, in particular to an anti-jamming broadband receiver with adjustable gain. Background technique [0002] The receiver is an essential part of the wireless communication field. The normal operation of communication equipment such as radar, satellite, and broadcasting is inseparable from the receiver. The receiver mainly performs frequency conversion processing on the received high-frequency signal and converts it into a frequency Low, intermediate frequency signal that can be directly processed by AD sampling. The performance index of the receiver directly determines the quality of the received signal. [0003] With the development of science and technology and the improvement of chip manufacturing level, the performance index of the receiver is also getting higher and higher. However, some performance indicators of the receiver are mutually restricted. For example, increasing the gain will red...

AI Technical Summary

Problems solved by technology

However, some performance indicators of the receiver are mutually restricted. For example, increasing the gain will reduce the noise figure of the entire receiver, but increasing the gain will also reduce the dynamic range of the receiver.

In order to achieve high gain and large dynamic range of the receiver, it is necessary to find a trade-off between various performance indicators. In addition, as more and more frequency bands are used commercially, the electromagnetic environment is becoming more and more complex. The requirements of performance indicators in the environment are constantly increasing, making it more complicated to find a trade-off between various performance indicators

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