Communication signal detection method/system, computer readable storage medium, and equipment

Abstract

The invention provides a communication signal detection method / system, a computer readable storage medium, and equipment. The detection method comprises the following steps: traversing a frequency hopping pattern of a symbol group of a random access preamble in a received communication signal; according to the frequency hopping pattern, extracting a symbol of a corresponding time-frequency position in the communication signal, judging whether the random access preamble exists in the received communication signal, and if yes, then acquiring the frequency offset of the communication signal; andaccording to the frequency spectrum of the communication signal, interpolating symbol groups under different sub-carriers in the random access preamble to corresponding time domain positions, and estimating the time offset of the communication signal according to symbols obtained by interpolating. According to the communication signal detection method provided by the invention, adjacent symbols ofthe corresponding symbol group of the received signal are subjected to differential conjugate multiplication, a preamble sequence does not need to be generated locally, and the received preamble sequence can be judged; and then the preamble sequence in the received signal is detected, and values of the time offset and the frequency offset are obtained through corresponding calculation, so that synchronization is completed without causing interference to the detection.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Things and relates to a detection method and system, in particular to a communication signal detection method / system, a computer-readable storage medium and equipment. Background technique [0002] The Internet of Things technology based on the NB-IoT (Narrowband Cellular Internet of Things) standard is a new technology in long-distance wireless communication technology. It has six major technologies for application scenarios such as a large number of terminal transmissions, a small amount of data transmitted by a single terminal, and a fixed terminal location. The advantages are wide coverage, multiple connections, low speed, low cost, low power consumption, and excellent architecture. NB-IoT technology supports the efficient connection of devices with long standby time and high network connection requirements. NB-IoT devices have a battery life design goal of up to 10 years, while also ...

AI Technical Summary

Problems solved by technology

Another existing detection algorithm uses two-dimensional FFT to extract the peak value to detect the leading sequence, but there are a large number of non-leading sequence position signals in the signal, and doing two-dimensional FFT will introduce a large side lobe, which will interfere with the detection

[0023] Therefore, how to provide a communication signal detection method / system, computer-readable storage medium and equipment to solve the problem of the need to locally generate preamble sequences in the prior art, or to perform two-dimensional FFT on signals with a large number of non-preamble sequence positions in the signal , it will introduce a large side lobe, which will cause defects such as interference to the detection, which has become a technical problem to be solved urgently by those skilled in the art.

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