先输入一个关键字符串，然后输入一个句子 找出关键字符串在句子中位置...

在基于脉冲的UWB系统中，采用瑞克接收机合并多径信号能量并进行相干检测，信道估计问题即估计多径信号的到达时间和幅度。在基于OFDM的UWB系统中，接收机根据信道频域响应对每个子信道进行频域均衡后进行相干检测，信道估计问题即估计信道频域响应。-Pulse-based UWB systems, rake receivers using the combined multipath signal energy and coherent detection, channel estimation problem that is estimated multipath signal arrival time and amplitude. OFDM-based UWB system, the receiver under the channel frequency response of each subchannel to frequency domain equalization after coherent detection, channel estimation problem that is estimated channel frequency response.

点阵LED字符显示器的设计 可以显示四个汉字。 并且可以按照不同的方式显示出来。 -lattice LED character display will show the design of four Chinese characters. And according to different ways of show.

多路移位寄存器dsasg asgagvgdafgadtgertgdafgdafgda-multi-shift registers dsasgasgasgagvgdafgadtgertgdafgdafgda

你可以做个试试看,我是做了一个,有感觉-you can make a try, I have to do one, and feel that

我们汇编语言的一个大作业,一个主程序,调用三个模块-a major operation, a main program, called three modules

msp430的413单片机AD充放电程序-MSP430 Singlechip AD of 413 charge-discharge process

ch451显示和四位共阴极数码管1234-ch451 four common cathode display and digital tube 1234

在字符LCD上显示中文字，采用汇编语言。并且在PROTES上运行通过-In the character LCD display Chinese characters, using assembly language. And in PROTES run through the

用单片机制作的高精度计数器，验证通过，适用于计数场合。-Produced using high-precision single-chip counters, authentication is passed, apply to count occasions.

这是一个数码管0-99计数器，请大家指点-This is a digital tube 0-99 counter, please instruct