功率约束下低相关旁瓣的通导一体化波形研究

Research on Integrated Waveform of Communication and Navigation with Low Correlation Sidelobe Under Power Constraints

关键词:  自相关函数  星座图  加权优化  变量交替迭代  功率约束

Key words:  Autocorrelation function  Constellation  Weighted optimization  Alternating iteration  Power constraints

摘要:

通信导航一体化是未来无线系统的发展趋势，可以更加充分地利用频谱资源。设计了一种新的一体化波形，在实现通信符号传递的同时，利用其进行时延测距进而实现相应的定位导航功能。一种联合的优化目标函数被提出，其中以星座图上的范数误差衡量通信性能，以自相关函数的加权积分旁瓣电平衡量波形的定时性能。结合一体化系统的实际，在问题求解时同时考虑了波形总功率约束和波形恒模约束，并采用变量交替迭代优化的算法进行迭代求解。最后利用数值仿真验证了算法的有效性。

Abstract:

The integration of communication and navigation is a trend of future wireless system, which can make full use of spectrum resources. In this paper, a new integrated waveform is designed, which not only realizes the communication symbol transfer, but also realizes the corresponding positioning and navigation function by using the time-delay ranging. A joint optimization objective function is proposed for the waveform design. The communication performance is measured by the norm error in the constellation diagram, and the timing performance of the waveform is measured by the weighted integral sidelobe level of the autocorrelation function. The total power constraint and constant mode constraint are considered in solving the problem, and an iterative optimization algorithm of variable alternation is applied. Finally, the effectiveness of the algorithm is verified by numerical simulation.