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2
说明： 2. 关于无线信道的多普勒谱，请回答以下问题：
(1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因；
(2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理；
(3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions:
(1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing;
(2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape;
(3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)
- 2021-01-23 19:48:44下载
- 积分：1
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Test
并口通讯，通过并口控制打字机刻在自行车上，防止自行车丢失(Parallel port communication, and by the parallel port control typewriter engraved on the bike, to prevent the a bike to lost)
- 2013-04-25 10:20:21下载
- 积分：1
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BPSK的simulink仿真
对BPSK进行matlab仿真，包括完整参数，星座图(Matlab simulation of BPSK)
- 2017-09-18 20:16:39下载
- 积分：1
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VB串口实验me
计算机网络实验做得串口，非原创，只是为了下载方便。(Computer network experiments do serial port, not original, just for download convenience.)
- 2018-12-06 11:10:58下载
- 积分：1
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fsyzmzp
调用mobile外部程序,操作系统windows mobile()
- 2018-04-21 07:58:13下载
- 积分：1
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Si4432datesheet
si4432射频芯片的中文开发资料，寄存器配置等(the si4432 radio frequency chip Chinese development information, register allocation)
- 2012-11-21 13:46:24下载
- 积分：1
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SmartHome2.0
这是一款安卓软件，在之前上传的第一版的基础上，完善了家居控制功能，增加了聊天室、手机电脑实时记录、画板功能等。适用于安卓开发大作业，也可供大创参考(This is Smart Home version2.0)
- 2017-06-21 13:14:22下载
- 积分：1
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communication
针对通信侦查课题，通过已知先验知识和截获信号，进行找出同步序列，匹配滤波，校正频偏和相偏，均衡，解交织，译码，恢复出原序列，最终得到的序列与原序列作对比得到误码率为0(Investigation subject for the communication, by known a priori knowledge and intercepted signal conducted to identify the synchronization sequence, the matched filter, correcting frequency offset, and phase deviations, balanced, deinterleaving, decoding, to recover the original sequence, the resulting sequence with the original sequence compared error rate is 0)
- 2012-08-21 22:22:08下载
- 积分：1
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AD9854代码
300 MHz内部时钟频率
集成的12位输出DAC
超高速，3 ps RMS抖动比较器9854代码(300 MHz Internal Clock Rate
Integrated 12-Bit Output DAC
Ultrahigh-Speed, 3 ps RMS Jitter Comparator9854code)
- 2021-04-26 14:08:45下载
- 积分：1
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viterbi
The Viterbi algorithm
- 2009-05-09 07:54:57下载
- 积分：1
