A system for anti-jamming vehicle radio

Abstract

A system for anti-jamming vehicle radio integrates all key RF components, comprises a PLL tuning module, an intermediate frequency amplifier, an intermediate frequency filter, a squelch module, a bandwidth control module and an automatic gain control module, and provides a good weak signal processing function, the bandwidth of the FM can be dynamically controlled when the FM is received, and the radio reception performance of the automobile in the process of high-speed driving and driving between mountains is improved. All functions of the radio are controlled by connecting the main control chip through the I2C bus, realizing the functions of automatic / manual channel searching and automatic / manual channel storage, etc. The system has the advantages of good stability, strong anti-jamming ability and good sound quality under the vehicle-mounted mobile receiving conditions.

Description

technical field [0001] The invention belongs to the technical field of car audio, and relates to a car radio, in particular to an anti-jamming car radio system. Background technique [0002] In many countries and regions, broadcasting is a free public service. In addition to bringing a rich and colorful auditory feast to the audience, broadcasting can also provide drivers with timely road condition information, weather information, etc. to serve the majority of riders. columns. Therefore, the radio part has become an indispensable functional part of the car audio system. [0003] The basic working principle of the radio is: that is, the high-frequency signal received from the antenna is modulated, amplified, filtered and detected (demodulated), and then restored to an audio signal, which is sent to the speaker through the power amplifier for playback. [0004] There is a big difference between the working environment of a car radio and a general-purpose radio: the mobility...

AI Technical Summary

Problems solved by technology

[0004] There is a big difference between the working environment of a car radio and a general-purpose radio: the mobility of the car may cross several temperature ranges in a short time; When driving in remote areas or low-lying mountainous areas, at the same time, the switching of other automotive electrical switches will bring large radio noise to the radio

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