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本文描述了以具有微程序功能的微处理器为基础的高性能 FFT 处理器。该系统处理256点的复数变换所需的时间小于5.3ms,并且能够处理长度可变(4～256,基-2)的复数变换。系统采用定点运算,而每个复数数据都由16位二进制补码形式的实部和虚部组成。硬件由 Intel 3000位片式微处理器、TRW 乘法芯片(MPY-16AJ)、输入和输出RAM(随机存取存储器)、控制用可编程序只读存储器(PROM)和一些 TTL 逻辑组成。处理器通过“CAMAC”接口用 NOVA-2小型计算机进行了试验,其结果与在UNIVA-1108计算机上所获得的理想结果进行了比较。
This article describes a microprocessing-based microprocessors based high-performance FFT processor. The system takes less than 5.3ms to process 256-point complex transforms and can handle complex transforms of variable length (4 to 256, radix-2). The system uses fixed-point arithmetic, and each complex data consists of real and imaginary parts in the form of a 16-bit two's complement. The hardware consists of an Intel 3000-chip microprocessor, a TRW multiplication chip (MPY-16AJ), input and output RAM (random access memory), control programmable read-only memory (PROM), and some TTL logic. The processor was tested with the NOVA-2 minicomputer via the “CAMAC” interface and the results were compared with the ideal results obtained on the UNIVA-1108 computer.