一种高效的低相关区正交多相码设计方法

doi:10.3969/j.issn.1001-2400.2017.01.014

摘要/Abstract

摘要：

针对现有在主瓣附近(低相关区)具有低旁瓣的广义正交多相码设计效率低、效果较差等问题，提出一种基于预测模型的快速设计方法．先随机产生一组码长较短的初始多相码信号集；再通过最小化其低相关区内的自相关旁瓣能量和互相关能量，预测每路信号的下一位码元；最后通过连续预测得到任意码长的正交波形．所提方法与现有方法相比，优化过程中递推计算相关函数计算复杂度低，所得波形具有更低的自相关旁瓣和互相关峰，满足所推得的主副瓣比理论界．

Abstract:

Multiple input multiple output (MIMO) radar can fundamentally improve radar performance by using the orthogonal polyphase code with a low correlation zone(LCZ) in some conditions. A novel approach based on the prediction model is proposed to design such orthogonal signals more efficiently and more effectively than the traditional optimization method. An initial polyphase code set with a short code-length is randomly generated as a basis first, and then minimizing the weighed energy of autocorrelation sidelobes and cross-correlation in the LCZ to predict the next code of each signal continuously, until reaching any appointed code-length. Compared with the common optimization methods, the computational complexity is lower due to the recursive calculation of the correlation function, and especially, the obtained waves have a lower autocorrelation peak sidelobe and cross-correlation peak, meeting the deduced theoretical bound of the ratio of peak sidelobe to mainlobe.

Key words: multiple input multiple output (MIMO) radar, low correlation zone (LCZ), orthogonal polyphase code, prediction model, theoretical bound, low complexity

张威;杨明磊;陈伯孝. 一种高效的低相关区正交多相码设计方法[J]. 西安电子科技大学学报, 2017, 44(1): 77-82+145.

ZHANG Wei;YANG Minglei;CHEN Baixiao. Efficient design method for the low correlation zone orthogonal polyphase code[J]. Journal of Xidian University, 2017, 44(1): 77-82+145.

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