Adaptive broadcasting station searching device, adaptive broadcasting station searching method and FM receiver

Abstract

The invention discloses an adaptive broadcasting station searching device, an adaptive broadcasting station searching method and an FM receiver; wherein the adaptive broadcasting station searching device, the adaptive broadcasting station searching method and the FM receiver belong to the technical field of automatic broadcasting station searching. The adaptive broadcasting station searching device comprises a scanning unit; a threshold setting unit which is connected with the scanning unit; a storage unit which is connected with the threshold setting unit; a broadcasting station searching unit which is connected with the storage unit; and a recording unit which is connected with the broadcasting station searching unit. The adaptive broadcasting station searching method comprises the steps of firstly performing envelope detection on receiving signal strengths of all frequency points of a full frequency band, and adding a preset demodulation threshold on a detected envelope number, thereby forming a broadcasting station threshold which corresponds with each frequency point; afterwards beginning an FM broadcasting station searching process, and for each searched frequency point, determining whether the receiving signal strength is larger than the corresponding broadcasting station threshold, and determining whether the pilot frequency energy is larger than a preset standard pilot frequency energy; and recording the frequency points which satisfy the two conditions. The adaptive broadcasting station searching device, the adaptive broadcasting station searching method and the FM receiver have a beneficial effect of preventing a problem that some false broadcasting stations and pseudo broadcasting stations are mistakenly considered as true broadcasting stations caused by fixed broadcasting station searching threshold.

Description

Technical field [0001] The invention relates to the technical field of automatic station search, in particular to an adaptive station search device and method, and an FM radio. Background technique [0002] With the development of science and technology, more and more FM radio modules are integrated into other mobile devices, such as adding FM radio functions in mobile phones, and adding radio functions in vehicle equipment. Although the above integration allows users to use the FM radio function more conveniently, because the PCB board wiring in general mobile devices is more complicated and there are more functional components, it will generate many interference sources, and the noise generated by the interference sources will affect the normal operation. Listening process. At the same time, in the traditional search process, because the search threshold is fixed, sometimes the interference noise station is mistaken for the real station, and sometimes the real station with acc...

AI Technical Summary

Problems solved by technology

[0003] According to the problems existing in the prior art, an adaptive channel search device and method and a technical solution for FM radio are now provided, aiming to solve the problem of partial pseudo-channels and False stations are mistaken for real ones; specifically include:

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