Signal detection and acquisition method, device, receiver and storage medium

Abstract

The embodiment of the invention discloses a signal detection and acquisition method, device, receiver and storage medium. The method is applied to the receiver, including: obtaining the current received signal sequence and the corresponding current receiver state; performing timing position correction and frequency offset correction on the current received signal sequence according to the matching operation with the current receiver state, and correcting the corrected Perform piecewise Fourier transform processing on the current received signal sequence; update the receiver state according to the transform processing result and the state switching condition matching the current receiver state, and the receiver includes multiple optional switching states; return to execute The operation of acquiring the current received signal sequence and the current receiver state corresponding to the current received signal sequence until it is determined that the frame signal to which the current received signal sequence belongs is the target signal. The technical solution of the embodiment of the present invention realizes reducing hardware resource consumption and improving data processing speed while ensuring target signal capture accuracy.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of wireless communication, and in particular, to a signal detection and acquisition method, device, receiver and storage medium. Background technique [0002] In order to meet the communication between more and more long-distance IoT devices, low-power, high-capacity wide-area networks have emerged, for example, Lora and sigfox that work in unlicensed frequency bands, and NB-IoT that work in licensed frequency bands, etc. . The anti-interference tolerance of spread spectrum technology is high, even if the signal is annihilated in the noise, the information can be received correctly, which is suitable for long-distance communication. [0003] In the prior art, the low-power wide-area network represented by Lora uses a linear sweep signal as a spread-spectrum signal. Since the Fourier transform can simplify calculations and improve efficiency in signal processing in many scenarios, t...

AI Technical Summary

Problems solved by technology

However, the larger the spreading factor that the receiver can support, the longer the length of the received signal sequence of a single Fourier transform. When the sequence length of the received signal is very long, on the one hand, the calculation amount of Fourier transform is very large , the calculation time required is very long, and the data processing speed is slow. On the other hand, it needs to occupy more hardware resources and increase resource consumption.

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