Signal frequency detection method and device, and signal frequency controller

Abstract

The invention relates to a signal frequency detection method and device, and a signal frequency controller. According to the detection method, frequency division processing is carried out on to-be-detected signals, thereby obtaining frequency divided to-be-detected signals with relatively low frequency; when a reference clock signal is in a preset level state, statistics is carried out on the period number of the frequency divided to-be-detected signals, thereby obtaining the statistic period number of the frequency divided to-be-detected signals; the practical frequency of the to-be-detected signals is calculated according to the statistic period number, the duration during which the reference clock signal is in the preset level state and the frequency division times of the to-be-detected signals; and the next-step adjustment direction of the frequency of the output signals of an oscillator can be guided according to the deviation between a practical frequency value and a theoretical value. According to the embodiment of the invention, after frequency reduction is carried out on the to-be-detected signals, the period statistics is carried out on the frequency reduced to-be-detected signals through utilization of the reference clock signal with relatively low frequency; the problem of a count error resulting from directly sampling and counting high-frequency signals is solved, and the signal detection precision is ensured.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular, to a signal frequency detection method, a device and a signal frequency controller. Background technique [0002] In wireless communication technology, the higher the frequency of the communication signal, the wider the available frequency band and the larger the channel capacity. Correspondingly, the interference between different frequency channels can be reduced or avoided. Therefore, in the wireless communication process , the high frequency signal is widely used as the carrier signal. [0003] At present, high-frequency signals are mainly generated by oscillators. Therefore, in the wireless communication system, the performance of various indicators of the oscillator determines the performance of the wireless communication system, but the frequency stability and frequency accuracy of the oscillator are the most influential. Specifically, if the freq...

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Problems solved by technology

[0005] However, if the frequency of the output signal of the oscillator 1 is high, the frequency of the clock source in the frequency detection device 2 will also be multiplied, which not only increases the power consumption of the frequency detection device 2, but also increases the structural complexity of the frequency detection device 2 ; In addition, when the frequency of the output signal of the oscillator 1 exceeds the bandwidth and the timing limit of the internal integrated circuit of the frequency detection device 2, it will also cause the signal counting error problem of the frequency detection device 2

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