A high frequency wideband receiver and signal processing method

Abstract

The present invention designs a functionally expandable heterodyne structure high-frequency broadband receiver. The system includes: a single-chip microcomputer, a power supply module, a low-noise preamplifier module, a mixer module, a local oscillator signal source module, and an intermediate frequency filter. Module, digital attenuation AGC module, RMS detection module, phase frequency discriminator and envelope detection circuit module. Beneficial effects: Each module adopts a discrete standard interface design, which is highly detachable and expandable. The system reserves multiple measurement ports and expansion points. Users can adjust existing modules or add new circuit modules according to actual needs. Secondary development and performance optimization can be easily carried out to meet the specific design of specific scenarios or specific signals in extreme cases of emergencies.

Description

technical field [0001] The invention relates to a wideband receiver, in particular to a high frequency wideband receiver based on a superheterodyne structure. Background technique [0002] In recent years, high-frequency short-wave communication usually plays an important role in radar, military, broadcast communication, maritime communication, battlefield command and emergency rescue. [0003] Since high-frequency short-wave communication propagates electromagnetic waves through the reflection of the ionosphere, it does not require the support of ground relay equipment, so it can be used as an emergency communication method to ensure smooth communication. High-frequency digital short-wave communication is not restricted by the geographical environment. It can cover these areas, realize smooth communication and low cost. It only needs a simple communication transceiver station and low power to realize high-frequency short-wave communication. [0004] In the prior art, high-...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, high-frequency broadband receivers emphasize versatility, and various design indicators have been determined at the time of design, and users cannot change them independently. For unexpected extreme situations encountered in production and life, the receiver cannot be adjusted in a timely and effective manner according to requirements. performance tuning

Lack of targeted special handling for specific measurement situations or specific signals, poor specificity in special cases

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