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电荷耦合器件(CCD)作为采样存储器,与用来进行脉冲压缩的声表面波(SAW)延迟线相结合,可使傅里叶变换信号处理机得到改进。改进了的傅里叶变换信号处理机所付的成本是合算的,并与数字快速傅里叶变换处理机性能不相上下。本文介绍的线性调频Z变换(CZT),可用来对时间压缩和线性调频脉冲进行中频处理。这样允许采样信号以毫秒或更慢的周期存储在电荷耦合器件存储器中,然后以微秒用线性调频滤波器进行Z变换。这样就得到了一个速度相当高的频谱分析。某些应用既要求幅度信息,又要求相位信息。本文示出了通过消除残余的二次相位而达到线性复合输出的结构图形,使旁瓣性能与变换大小无关。对于多路通道频谱分析系统,为了实际上使结构达到体积小而成本合算的目的,必须研究两种关键性的器件:线性可寻址的IK单元CCD存储器,铋锖氧化物大时间带宽乘积(1420)SAW线性调频延迟线。
The charge-coupled device (CCD), as a sample memory, combined with a SAW delay line for pulse compression, allows the Fourier Transform signal processor to be improved. The cost of an improved Fourier Transform signal processor is cost-effective and comparable to the performance of a digital Fast Fourier Transform processor. This article describes the chirp Z transform (CZT), can be used to time compression and chirp IF processing. This allows the sampled signal to be stored in the charge-coupled device memory in milliseconds or slower and then Z-transformed with a chirp filter in microseconds. This gives a fairly high-speed spectrum analysis. Some applications require both amplitude and phase information. This article shows the structure of the linear composite output by eliminating the residual quadratic phase, leaving the sidelobe performance independent of the size of the transform. For multichannel spectrum analysis systems, two key components must be investigated in order to actually make the structure compact and cost-effective: a linearly addressable IK cell CCD memory, a bismuth oxide oxide large time bandwidth product ( 1420) SAW chirp delay line.