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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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viterbi1
viterbi decoder 2/3 rate
- 2014-05-29 22:18:26下载
- 积分:1
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IIR
使用matlab实现设计IIR滤波器:冲激不变法、双线性变换法
设计一个巴特沃思低通滤波器,其技术指标为:3dB带宽为,阻带截止频率为,阻带衰减大于30dB,采样间隔T=10us。
1)用冲激响应不变法
2)用双线性变换法设计
3)用FIR的矩形窗函数设计
二、用双线性变换法分别设计低通、高通、带通、带阻四种滤波器。模拟滤波器带原型分别为切比雪夫滤波器和椭圆滤波器,采样率Fs=20kHz,指标如下:
1)低通:通带0~4 kHz,阻带5 kHz,通带衰减Rp=0.5dB,阻带衰减As=10dB。
2)高通:阻带0~4 kHz,通带5 kHz,通带衰减Rp=0.5dB,阻带衰减As=10dB。
3)带通:通带2kHz~4 kHz,阻带0~1.5 kHz,4.5kHz以上,通带衰减Rp=0.5dB,阻带衰减As=10dB。
4)带阻:阻带2kHz~4 kHz,通带0~1.5 kHz,4.5kHz以上,通带衰减Rp=0.5dB,阻带衰减As=10dB。(Using MATLAB to implement the design of IIR filters: impulse invariant and bilinear transformation)
- 2018-01-06 15:19:26下载
- 积分:1
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PLC_BORD
网络传输控制信号,网络芯片是W5100,传输信号可为控制信号与开关信号,modbus通信协议。(PLC TO W5100,the led and i/o can traver bay w5100,use msp430f5438 as cpu,modbus an 485 to the sevlers,pc use to controle.)
- 2012-03-26 18:14:07下载
- 积分:1
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rs
说明: rs编解码,对实现了rs码的编解码,并对其误码率进行了分析仿真(rs codec, to the achievement of the rs code coding and decoding, and BER analysis simulation)
- 2008-11-22 10:32:37下载
- 积分:1
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Filterbankbasedblindsignaseparationwithestimatedso
采用滤波器组,将盲分离与声源定位结合在一起。滤波器组中分别进行子带处理,并且在每个子带中进行声源定位,最后综合所有子带估计的方向得到多个声源的方位信息,同时将声源信息作为ICA分析的约束条件,可以在色噪声及多得到更好的盲分离效果。其优势在于用滤波器组进行多次的估计声源方向,再加以合适的权值均衡后即可得到更优的估计。(The use of filters will be blind source separation and sound localization together. Filter group were sub-band treatment, and in each sub-band in Sound Source Localization, and finally all the sub-band is estimated to be more than the direction of sound source location information, as well as sound source information as ICA analysis of the binding conditions, colored noise can be better and many of the blind source separation effect. Its advantage lies in a number of filter banks with estimated sound source direction, coupled with an appropriate balance weights can be obtained after the better estimate.)
- 2009-03-06 09:24:04下载
- 积分:1
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ListStudent
输入学生的name,number,class等内容(importation students name, number, class, etc.)
- 2007-05-14 19:03:11下载
- 积分:1
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efzicinnt
说明: 车载设备写码说明 关于现在的CDMA改ENS码的资料~真的很有用的呀!你可以自己解决这个问题!(On-board equipment to write code on the current CDMA to ENS code data ~ really useful ah! You can solve this by yourself!)
- 2019-03-28 15:35:08下载
- 积分:1
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TDMAopnet
说明: opnet仿真tdma 编程 很适合基本的学习(opnet tdma simulation)
- 2021-04-13 14:58:56下载
- 积分:1
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psk
说明: 实现蒙特卡罗分析,可以直接调用进行对误码率等数字通信的相关参数分析(The realization of the Monte Carlo analysis, can directly call on the bit error rate for digital communications, such as analysis of relevant parameters)
- 2008-08-30 16:08:38下载
- 积分:1