CN-122001406-A - Multichannel parallel frequency hopping receiving method and system

CN122001406ACN 122001406 ACN122001406 ACN 122001406ACN-122001406-A

Abstract

The invention relates to the technical field of wireless communication, and provides a multichannel parallel frequency hopping receiving method and system, comprising the steps of obtaining an analog signal received by an antenna, and converting the analog signal into a multichannel digital signal through a multichannel analog-to-digital converter; the method comprises the steps of processing each path of digital signal and different local oscillation signals through a digital mixer and a band-pass filter to generate down-conversion signals, inputting the down-conversion signals into an integrator to obtain an integration result, inputting the integration result into a comparator to compare, obtaining a path of down-conversion signals with the maximum value as frequency shift keying modulation signals containing data, inputting the frequency shift keying modulation signals into a demodulator to obtain demodulated information data, and completing the debounce of frequency hopping signals. The invention solves the problems of easy data loss and low synchronization speed in the existing frequency hopping spread spectrum communication de-hopping process.

Inventors

TAN SHUFENG
LU LIANWEI
LI CHAO
WANG ZHONGFENG
DENG BOJIN
LI XIAOBO
WANG JINWEI
CHANG SHENG

Assignees

北京国科天迅科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20231122

Claims (10)

1. A multi-channel parallel frequency hopping receiving method, comprising: Acquiring an analog signal received by an antenna, and converting the analog signal into a plurality of paths of digital signals through a plurality of paths of analog-to-digital converters; Processing the digital signals of each path and different local oscillation signals through a digital mixer and a band-pass filter to generate down-conversion signals; Inputting the down-conversion signal to an integrator to obtain an integration result; Inputting the integration result to a comparator for comparison to obtain a path of down-conversion signal with the maximum value as a frequency shift keying modulation signal containing data; And inputting the frequency shift keying modulation signal to a demodulator to obtain demodulated information data, and completing the debounce of the frequency hopping signal.
2. The method for receiving multichannel parallel frequency hopping according to claim 1, wherein the step of obtaining the analog signal received by the antenna and converting the analog signal into a plurality of digital signals by a plurality of analog-to-digital converters comprises: Receiving a frequency hopping signal through an antenna, wherein the frequency hopping signal is an analog signal; the analog signals are sent to a multipath analog-to-digital converter, and the analog signals are converted into digital signals through the analog-to-digital converter.
3. The method for receiving multichannel parallel frequency hopping according to claim 1, wherein the step of processing the digital signal of each channel and the different local oscillation signals by the digital mixer and the band-pass filter to generate the down-conversion signal specifically comprises: Adding local oscillation signals to each path of digital signals, wherein the frequencies of the local oscillation signals are different, so that the local oscillation signals and the digital signals are mixed; Based on the mixed local oscillation signal and the digital signal, the mixed filtering is carried out through a digital mixer and a band-pass filter to generate a down-conversion signal.
4. The multi-channel parallel frequency hopping receiving method as claimed in claim 3, wherein the number of channels required by the receiver of the digital signal is the same as the number of carrier frequencies of the frequency hopping signal; The frequency of each middle local oscillation signal is a carrier frequency of a frequency hopping signal, the bandwidths of the band-pass filters are the same, and the center frequency is a fixed intermediate frequency.
5. The multi-channel parallel frequency hopping receiving method as claimed in claim 1, wherein inputting the integration result to a comparator for comparison, obtaining a down-conversion signal of a maximum value as a frequency shift keying modulation signal containing data, comprises: The comparator receives multiple paths of integration results, compares each path of integration results and generates comparison results; And selecting a path of down-conversion signal with the maximum value from the comparison result as a frequency shift keying modulation signal containing data.
6. The multi-channel parallel frequency hopping reception method as claimed in claim 1, further comprising: inputting the frequency shift keying modulation signal to a synchronous system, carrying out synchronous capturing tracking and synchronous tracking, completing carrier synchronization and bit synchronization of the received signal, and generating a synchronous result; and inputting the synchronization result into a local oscillation signal generator to control the frequency phase of the local oscillation signal.
7. The multi-channel parallel frequency hopping receiving method as claimed in claim 6, wherein the pseudo-random code is captured based on the synchronization result, the position of the frequency hopping pattern of the synchronization head where the pseudo-random code is located is determined, clock information in the synchronization hopping is found, the corresponding service frequency hopping pattern is solved, synchronization is realized, and the frequency hopping signal is solved.
8. A multi-channel parallel frequency hopping reception system, the system comprising: The analog-to-digital conversion module is used for acquiring an analog signal received by the antenna and converting the analog signal into a plurality of paths of digital signals through a plurality of paths of analog-to-digital converters; The frequency mixing filtering module is used for processing the digital signals of each path and different local oscillation signals through the digital frequency mixer and the band-pass filter to generate down-conversion signals; The integrating module is used for inputting the down-conversion signal to the integrator to obtain an integrating result; the signal modulation module is used for inputting the integration result to the comparator for comparison, and obtaining a path of down-conversion signal with the maximum value as a frequency shift keying modulation signal containing data; And the debounce module is used for inputting the frequency shift keying modulation signal to a demodulator to obtain demodulated information data and completing debounce of the frequency hopping signal.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor implements the multi-channel parallel frequency hopping reception method of any one of claims 1 to 7 when executing the program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the multi-channel parallel frequency hopping reception method according to any of claims 1 to 7.

Description

Multichannel parallel frequency hopping receiving method and system Technical Field The present invention relates to the field of wireless communications technologies, and in particular, to a method and a system for receiving multichannel parallel frequency hopping. Background The frequency spectrum of the transmission signal is spread to hundreds of times, even thousands of times by adopting a pseudo-random sequence, and the frequency spectrum of the transmission signal is converted into a wideband signal submerged in noise by a narrowband signal which is easy to be detected, so that the frequency spectrum hopping spread spectrum communication technology has the advantages of low interception probability, strong anti-interference capability and the like. The frequency hopping technology is one of the most representative spread spectrum communication technologies, is relatively developed and mature at present, and is widely applied to tactical weapons such as radars, missiles, submarines, unmanned aerial vehicles and the like by controlling the carrier wave to continuously carry out frequency hopping through a pseudo-random sequence. The frequency hopping communication technology is a broadband communication system from the macroscopic view, belongs to an instantaneous narrow-band communication system from the microscopic view, has strong compatibility and fully utilizes spectrum resources. The current frequency hopping signal receiver generates different local oscillation signals according to patterns through a DDS to carry out digital mixing, so that signal debounce is realized. However, this method needs to acquire a frequency hopping pattern at the receiving end, and perform synchronous capturing and tracking of the frequency hopping pattern. Disclosure of Invention The invention provides a multichannel parallel frequency hopping receiving method and system, which are used for solving the problems that data is easy to lose and the synchronization speed is low in the existing frequency hopping spread spectrum communication de-hopping process. The invention provides a multichannel parallel frequency hopping receiving method, which comprises the following steps: Acquiring an analog signal received by an antenna, and converting the analog signal into a plurality of paths of digital signals through a plurality of paths of analog-to-digital converters; Processing the digital signals of each path and different local oscillation signals through a digital mixer and a band-pass filter to generate down-conversion signals; Inputting the down-conversion signal to an integrator to obtain an integration result; Inputting the integration result to a comparator for comparison to obtain a path of down-conversion signal with the maximum value as a frequency shift keying modulation signal containing data; And inputting the frequency shift keying modulation signal to a demodulator to obtain demodulated information data, and completing the debounce of the frequency hopping signal. According to the multichannel parallel frequency hopping receiving method provided by the invention, the analog signals received by the antenna are obtained, and the analog signals are converted into multichannel digital signals through a multichannel analog-to-digital converter, and the multichannel parallel frequency hopping receiving method concretely comprises the following steps: Receiving a frequency hopping signal through an antenna, wherein the frequency hopping signal is an analog signal; the analog signals are sent to a multipath analog-to-digital converter, and the analog signals are converted into digital signals through the analog-to-digital converter. According to the multichannel parallel frequency hopping receiving method provided by the invention, the digital signals of each channel and different local oscillation signals are processed by a digital mixer and a band-pass filter to generate down-conversion signals, and the method specifically comprises the following steps: Adding local oscillation signals to each path of digital signals, wherein the frequencies of the local oscillation signals are different, so that the local oscillation signals and the digital signals are mixed; Based on the mixed local oscillation signal and the digital signal, the mixed filtering is carried out through a digital mixer and a band-pass filter to generate a down-conversion signal. According to the multichannel parallel frequency hopping receiving method provided by the invention, the number of channels required by the receiver of the digital signal is the same as the number of carrier frequencies of the frequency hopping signal; The frequency of each middle local oscillation signal is a carrier frequency of a frequency hopping signal, the bandwidths of the band-pass filters are the same, and the center frequency is a fixed intermediate frequency. According to the multichannel parallel frequency hopping receiving method provided by the invention, the