delay spread

Its channel capacity expression in the case of time delay spread is presented. And the emulation to compare MIMO system to MIMO+ OFDM system's capacity in interfered case is carried on.

最后对MIMO+OFDM技术进行了研究，给出了MIMO+OFDM技术在时延扩展情况下的信道容量表达式，并对MIMO系统和MIMO+OFDM系统在受干扰情况下的容量进行了仿真比较。

The platform of FPGA embedded signal processing based on the idea of software radio is set up to achieve the architecture of system on programmable chip ( SOPC). The time delay estimation model of sound wave spread spectrum system is established with the optimization of algorithm.

在此基础上，结合软件无线电思想，利用FPGA嵌入式数字信号处理平台实现可编程片上系统；建立声波扩频测距时延估计模型，研究数字信号处理优化算法，给出实验结果，分析和讨论测量精度问题。

A good performance if the channel delay spread is short.

模拟结果显示在延迟扩展较短时,可以得到较佳的系统效能.

This system can implement 4.86 Mbps data rate and tolerate 2.5 μ s time delay spread.

该系统在2MHz的频率带宽内，数据通信速率最高可达4.86Mbps，可以容忍的时延扩展为2.5μs。

In shallow water, conventional sonar performance deteriorates due to time delay spread and Doppler shift of acoustic wave propagation in waveguide environment.

在浅海波导环境中，因声波传播存在严重的时延扩展和多普勒频偏，常规声纳的性能下降，需要研究和发展新的水声信号处理方法。

The smart antenna is able to improve SINR significantly and reduce time delay spread and multipath fading at the same time.

自适应阵列天线在近年来被称为智能天线，它能够显著提高系统的信号干扰噪声比（SINR），能够减小时延扩展及多径衰落，实现空分多址。