双通道实时数据采集处理系统的设计与实现

本文提出了一种基于 TMS32 0 C31串行接口的双通道实时数据采集处理系统的设计与实现方案 ,该设计以 TMS32 0 C31和 TL C32 0 AD5 0 C为核心器件 ,具有两个独立的 A/D,D/A通道 ,能够实现 32位浮点计算和 16位数据采集与回放。应用该系统进行归一化最小均方误差 (Normal-ized L east Mean Square,NLMS)算法实时自适应噪声抵消实验 ,实验结果表明 ,该系统能够实现实时的自适应噪声抵消 ,可广泛应用于实时语音信号处理等领域。

Design and Implementation of Dual Channel Real Time Data Acquisition and Processing System

TMS320C31 EVM board has only one analog-to-digital (A/D) and digital-to-analog (D/A) channel, which limits the use of EVM to implement multi-channel data acquisition and processing, such as dual channel adaptive noise cancellation. A new scheme to design and implement a dual channel real time data acquisition and processing are presented. The system is based on TMS320C31 serial port and adopts TLC320AD50C as the A/D and D/A conversion device. It has two separate A/D and D/A channels, capable of implementing 32-bit floating-point operation and 16-bit data acquisition and playback. A real-time adaptive noise cancellation experiment, using Normalized Least Mean Square (NLMS) algorithm, is implemented on the designed system, and this proves that the system can rational real time adaptive noise cancellation and can be applied to speech signal real time processing an other fields.