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我们在法国国家通讯研究中心的μPTS型、日本电气公司的μPD7720型和美国得克萨斯仪器公司的TMS3200型专用微处理器上研究了信号处理的典型应用,如1200Bps(比特/秒)的调制—解调器和64个复数点的实时FFT(快速傅里叶变换)。这项研究使我们能对所考虑的各种不同结构层次进行分类并弄清各自在限定的应用范围内的优缺点。该方法包括证明有效的模拟阶段和接下来作为验证的硬件制造阶段。算法调试是采用Pascal语言来实现的。算法的模拟所用的ISPS(指令组处理程序说明)软件能够描述微处理器内部结构和它的硬件和软件特性,是一个机动性大、功能强的辅助程序。它给我们提供了关于信号处理微处理器及其指令组结构基本点方面的很多信息。我们尤其强调了编址方式、溢出控制、序列重复指令、循环计数器、延迟寄存器、输入输出控制的重要性。该方法目前已用于实现4800Bps调制—解调器。
We studied typical applications of signal processing at the μPTS type of the National Communication Research Center of France, the μPD7720 type of NEC and the TMS3200 type microprocessor of Texas Instruments of the United States, such as the modulation-demodulation of 1200 Bps (bits per second) Real-time FFT (Fast Fourier Transform) with 64 complex points. This study allowed us to classify the various levels of the hierarchy under consideration and to identify each of its strengths and weaknesses within a defined range of applications. The method consists of proving an effective simulation phase and the subsequent hardware manufacturing phase. Algorithm debugging is implemented using Pascal language. The ISPS (Instruction Set Processing Instructions) software used for the simulation of the algorithm is a very flexible and powerful auxiliary program that describes the internal structure of the microprocessor and its hardware and software features. It gives us a lot of information about the basic points of signal processing microprocessors and their instruction set structures. In particular, we emphasize the importance of addressing, overflow control, sequence repeat instructions, loop counters, delay registers, and I / O control. This method is currently used to implement 4800Bps modem - demodulator.