Signal processing method of OFDMradar communication integrated airborne platform system

Abstract

The invention discloses a signal processing method of an OFDM radar communication integrated airborne platform system.The signal processing method of the OFDM radar communication integrated airborne platform system mainly solves the problems of a high bit error rate of existing communication data, a large error of a recovered reference signal and a poor pulse compression effect. The implementationscheme is as follows: setting an echo signal condition, carrying out Fourier transform on the signal to obtain a frequency domain echo signal; extracting a pilot value from the frequency domain echosignal, using the pilot value to estimate a pilot position, and obtaining a pilot channel estimation value; using the pilot channel estimation value to estimate a whole channel, and obtaining a wholechannel estimation value; using the whole channel estimation value to carry out equilibrium on the transformed frequency domain echo signal; carrying out a communication decoding on the equalized signal and obtaining an original communication sequence, and using the sequence to construct a reference signal; and using the reference signal to carry out pulse compression on the echo signal. The signal processing method of the OFDM radar communication integrated airborne platform system reduces the bit error rate of the communication data, improves the pulse compression effect, and can be used inthe OFDM radar communication integrated airborne platform system.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a signal processing method, which can be used in an OFDM radar communication integrated airborne platform system. Background technique [0002] The traditional electronic equipment system only has the function of the radar system or the function of the communication system alone, and the functions that can be realized are relatively single. When it is required to realize two functions at the same time, the system will be bulky, and different resources such as frequency and time will be occupied, resulting in a decrease in resource utilization. In recent years, an electronic equipment system that combines radar technology and communication technology has emerged. The integrated radar communication system can solve the above problems well, and this type of system has received more and more attention. [0003] The integration of radar and communication refers to the elect...

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Problems solved by technology

[0004] One is to use radar and communication functions in a time-sharing manner. This implementation method allocates the two functions through time, which has the disadvantage of low utilization of time resources.

[0005] The second is to divide the frequency bands and use them for radar and communication functions respectively. This implementation method is wasteful in terms of spectrum utilization.

[0007] 1. When the integrated system moves at high speed relative to the target, the channel environment will change, and the bit error rate of communication data will increase, resulting in an error between the restored reference signal and the original reference signal;

[0008] 2. The processing effect of subsequent pulse compression is poor, which cannot meet the needs of the integrated system

[0009] 3. Due to the sensitivity of the OFDM signal to speed, when the pure OFDM method is adopted, the performance of the integrated signal will drop sharply, which will affect the reconstruction of subsequent reference signals and radar signal processing

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