The transmitting environment of MIMO system is always a mobile and multi path environment, so the receiver must get rid of the inter symbol interference and the inter channel interference.
MIMO系统的传输环境是移动的多径衰落环境，因此接收端必须消除接收信号的符号间干扰利通道间干扰。
2
The wall thickness measurement system by ultrasonic scan imaging technology was described, in which multi-channel probe, pulser-receiver PCI card and network were applied successfully.