SAW device implementation of a new weighted stepped chirp code signal for direct sequence spread spectrum communications systems

S.E. Carter, D. Malocha
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引用次数: 2

Abstract

This paper introduces a new weighted stepped chirp code signal for direct sequence spread spectrum (DS/SS) communications systems. This code signal uses the truncated cosine series functions as the chip functions. This code signal is the result of discretizing a continuous wave (CW) chirp which results in enhanced performance versus a pseudo noise (PN) code and equivalent performance and easier implementation than a CW chirp. This code signal will be shown to have improved compression ratio (CR) and peak sidelobe level (PSL) versus a PN code with identical code length and chip length. It also will be shown to have a similar CR and PSL compared to a CW chirp with identical pulse length and frequency deviation. The code signal is implemented on surface acoustic wave (SAW) devices which will be used as the code generator at the transmitter and the correlator at the receiver. Experimental data is presented and compared to the predicted results.
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SAW器件实现了一种新的加权阶跃啁啾码信号,适用于直接序列扩频通信系统
介绍了一种用于直接序列扩频(DS/SS)通信系统的加权阶跃啁啾码信号。这个代码信号使用截断的余弦级数函数作为芯片函数。这种编码信号是离散连续波(CW)啁啾的结果,与伪噪声(PN)编码相比,它的性能得到了增强,性能相当,而且比连续波啁啾更容易实现。与具有相同码长和芯片长度的PN码相比,该码信号将显示出具有改进的压缩比(CR)和峰值旁瓣电平(PSL)。与具有相同脉冲长度和频率偏差的连续波啁啾相比,它也将显示出相似的CR和PSL。编码信号在表面声波(SAW)器件上实现,表面声波器件在发射机处作为编码发生器,在接收机处作为相关器。给出了实验数据,并与预测结果进行了比较。
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