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4
说明： 4. 试说明卷积编解码的工作原理：
(1) 使用Simulink仿真卷积编码，并用Viterbi译码的方法进行解码，其中的编码、译码全部是自己编写代码(S-Function方式)，不是调用Simulink的已有编码、译码函数。
(2) 请在加性白高斯噪声信道中，画出比特信噪比与误码率的关系曲线。(4. Try to explain the working principle of convolutional codec:
(1) Simulink was used to simulate convolutional coding, and Viterbi decoding method was used for decoding. The coding and decoding were all written by oneself (s-function method), rather than calling the existing coding and decoding functions of Simulink.
(2) in the additive white gaussian noise channel, please draw the curve of the relationship between bit signal-to-noise ratio and bit error rate.)
- 2019-01-15 10:53:20下载
- 积分：1
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chuanganqi
传感信号无线数字传输系统的设计与实现.kdh(err)
- 2008-04-22 14:54:02下载
- 积分：1
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zz
说明： QPSK BPSK调制解调+USRP,观察（输入、输出、眼图）(modulation and demodulation of QPSK and BPSK+ USRP)
- 2015-06-15 20:24:51下载
- 积分：1
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ichat
一个真正SERVER PUSH的聊天室，很不错，C语言所写，最可惜的是已经被编译过了，但是界面全部被独立出来了的，可以自行更改，只是不能研究程序的内部结构…… (a real SERVER PUSH chat rooms, very good, C language written, it is most unfortunate that has been compiled, but the interface were all independent of and can make changes, but the procedures are not able to study the internal structure of ...)
- 2004-09-27 22:28:08下载
- 积分：1
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IIR 数字滤波器的设计与实现
说明： 设计一个巴特沃兹数字低通滤波器，其技术指标为：3dB带宽为0.2π，阻带截止频率为0.3π，通带纹波为1dB，阻带衰减大于30dB，采样间隔T=10ms。
1）采用冲激响应不变法；
2）采用双线性变换法设计；
3）采用FIR的窗函数（Hanning窗、Hamming窗或Blackman窗）设计。(A Butterworth digital low-pass filter is designed. Its technical specifications are: 3 dB bandwidth is 0.2 pi, stopband cut-off frequency is 0.3 pi, passband ripple is 1 dB, stopband attenuation is more than 30 dB, sampling interval T=10 Ms. 1) Impulse response invariance method is adopted. 2) Design by bilinear transformation method; 3) FIR window function (Hanning window, Hamming window or Blackman window) is used to design.)
- 2019-04-19 10:03:16下载
- 积分：1
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29625281MIMO-channel-matlab
说明： MIMO干扰广播信道分布和效用最大化的一种迭代加权MMSE方法(An Iteratively Weighted MMSE Approach to
Distributed Sum-Utility Maximization for a
MIMO Interfering Broadcast Channel)
- 2019-04-17 16:49:38下载
- 积分：1
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802.11
802.11无线网络权威指南+第二版（中文版）(Ppls of 802.11 Wireless Networks The Definitive Guide, Second Edition (Chinese Edition))
- 2012-06-19 20:36:38下载
- 积分：1
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5_Name
数组可以存放5个人的姓名，每个姓名包括first name，middle name和last name，输出姓名时，其中middle name只取大写的首字母，利用索引编写程序，使得用户输入last name后，输出姓名的全称。(array can store the names of five individuals, including the names of each first name, middle name and last name, the name of the output, which only middle name from the first uppercase letter, the use of indexing programming, enabling users to import last name, the name of the generic output.)
- 2005-05-27 10:10:19下载
- 积分：1
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communication
利用NIUSRP 和LABVIEW数字通信实验平台，进行信道估计和信道均衡，实践均衡器的原型设计和性能评测。(Use LABVIEW and NIUSRP digital communications test platform for channel estimation and channel equalization, practice equalizer prototyping and performance evaluation.)
- 2020-11-12 10:39:44下载
- 积分：1
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fangdiu
蓝牙防丢器，当手机与蓝牙模块超过一定距离时，手机自动报警。(Bluetooth prevention device, when the mobile phone with bluetooth module exceeds a certain distance, mobile phone automatic alarm.)
- 2020-12-19 23:19:09下载
- 积分：1
