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在信号分析和处理技术中,功率谱分析占着十分重要的地位。对离散的数字信号来讲,谱分析主要是由离散富里叶变换来完成的。近年来,由于快速富里叶变换(FFT)算法的出现大大减少了运算时间;同时随着大规模集成电路的迅速发展,使得实时地数字谱分析成为可能,因此离散功率谱分析已作为数字信号分析和处理中必不可少的手段之一,得到了极为广泛的应用。采用专门数字硬件做成的频谱分析仪具有速度快、使用简便等优点;然而,采用微处理器的频谱分析系统,由于代价低、灵活性强等特点,亦是十分可取的。本文介绍使用一个仅由5个集成电路片(5-chip)组成的8088微处理器系统来完成256点或512点(实数)
Power spectrum analysis plays a very important role in signal analysis and processing techniques. For discrete digital signals, spectral analysis is mainly done by discrete Fourier transform. In recent years, the advent of fast Fourier transform (FFT) has greatly reduced the computational time. At the same time, with the rapid development of large-scale integrated circuits, real-time digital spectrum analysis becomes possible. Therefore, discrete power spectrum analysis has been used as a digital signal analysis And one of the indispensable means of dealing with it, has been very widely used. Spectrum analyzers made with specialized digital hardware are fast, easy to use, and so on; however, spectrum analysis systems using microprocessors are also highly desirable because of their low cost and flexibility. This article describes using a 8088 microprocessor system consisting of only 5 integrated circuit chips (256-bit or 512-point real numbers)