NC-CE-OFDM radar communication integrated waveform design method

Abstract

The invention discloses an NC-CE-OFDM radar communication integrated waveform design method, and the method comprises the steps: setting a signal parameter, and initializing a target state; determining a subcarrier position and a PAPR condition of an unoccupied frequency band through a dynamic spectrum sensing and channel estimation technology; the PAPR is reduced by using a phase technology, and communication information is modulated on a subcarrier which does not occupy the bandwidth for transmission; solving the error rate of the discontinuous constant envelope integrated signal in the additive white Gaussian noise channel; solving a fuzzy function in the radar communication integrated signal; and solving the distance resolution, Doppler resolution and Doppler tolerance characteristics of the integrated signal waveform according to the fuzzy function. According to the method, the discontinuous OFDM signal and the phase modulation technology are combined, the problem of spectrum resource shortage can be relieved, and the maximum utilization rate of the discontinuous OFDM signal spectrum is achieved.

Description

technical field [0001] The invention belongs to the field of radar communication integration, and relates to a phase modulation technology of a discontinuous OFDM system, specifically an NC-CE-OFDM radar communication integration waveform design method, which can be used for radar communication integration of discontinuous OFDM signals Waveform design to reduce PAPR. Background technique [0002] With the rapid development of electronic information technology, the integrated combat platform mainly supported by discontinuous OFDM signals has become the backbone of radar communication integration, which can greatly improve the efficiency of spectrum utilization while relieving the shortage of spectrum resources to the greatest extent. . However, to achieve the development of discontinuous OFDM integration, it mainly depends on the suppression of PAPR by discontinuous OFDM signals. As the preferred way to suppress the PAPR of OFDM signals, phase modulation technology is of gre...

AI Technical Summary

Problems solved by technology

Therefore, both Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) can cause distortion of primary user transmission

Technologies based on time domain or distortion, such as clipping and filtering, will increase the interference of active subcarriers; technologies based on adjacent subcarriers in the frequency domain, such as coding, cannot perceive the position of active subcarriers, resulting in intersymbol interference; Techniques such as interleaving, selective mapping (SLM) and partial transmission sequence (PTS) require knowledge of the location of the active subcarriers

In a dynamic spectrum access network, the total number of active subcarriers and their locations may change continuously, and it is difficult for most PAPR reduction techniques to adapt to these changes. Therefore, these techniques are difficult to be directly used to reduce the PAPR of NC-OFDM signals

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