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Description: 格式 [sqnr,a_quan,code]=u_pcm(a,n)
输入样值序列a 、量化电平数目n, 程序计算量化间隔、进行均匀量化、进行编码、计算量化信噪比， 返回量化信噪比squn、编码前的量化序列a_quan、编码后的码序列code。
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Size: 898 |
Author: wx |
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Description: 设定a为N(0,1)的500个随机数和量化级数n＝64， 调用u_pcm.m, 分别输出sqnr、a(1:5)、a_quan(1:5)、code(1:5,:)。
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Size: 1154 |
Author: wx |
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Description: 产生一个幅度为1和频率为1的正弦信号,用均匀pcm方法分别用8电平和16电平进行量化,在同一坐标轴上画出原信号和以量化信号,比较这两种情况下的sqnr.
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Size: 9870 |
Author: 秦承峰 |
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Description: 格式 [sqnr,a_quan,code]=u_pcm(a,n)
输入样值序列a 、量化电平数目n, 程序计算量化间隔、进行均匀量化、进行编码、计算量化信噪比， 返回量化信噪比squn、编码前的量化序列a_quan、编码后的码序列code。
-Format [sqnr, a_quan, code] = u_pcm (a, n) input sample value sequence a, the number of quantization levels n, the calculation procedures to quantify interval, the uniform quantization, coding, computing quantization noise ratio, return quantization noise ratio squn, to quantify the pre-coding sequence a_quan, coding sequences after the code.
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Size: 1024 |
Author: wx |
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Description: 设定a为N(0,1)的500个随机数和量化级数n＝64， 调用u_pcm.m, 分别输出sqnr、a(1:5)、a_quan(1:5)、code(1:5,:)。
-Set a for the N (0,1) of 500 random numbers and quantify the series n = 64, call u_pcm.m, respectively output sqnr, a (1:5), a_quan (1:5), code (1 : 5,:).
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Size: 1024 |
Author: wx |
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Description: 产生一个幅度为1和频率为1的正弦信号,用均匀pcm方法分别用8电平和16电平进行量化,在同一坐标轴上画出原信号和以量化信号,比较这两种情况下的sqnr.-Produce a range of 1 and a frequency of one of the sinusoidal signal with a uniform method pcm level and 8 were 16 to quantify the level in the same axis to draw the original signal and to quantify the signal, comparing the two cases The sqnr.
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Size: 9216 |
Author: 秦承峰 |
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Description: pcm均匀pcm与非均匀pcm
一。产生长度为500的零均值，单位方差的高斯随机变量序列，用均匀pcm的方法用16电平进行量化：1）求所得的SQNR，该序列的前5个值，相应的量化值和相应的码字。2）画出量化误差（定义为输入值和量化值之间的差），同时 画出量化值作为输入值的函数的图。3）用128量化电平数重做2）题， 比较结果。-pcm uniform pcm with a non-uniform pcm. Have a length of 500 zero-mean, unit variance Gaussian random variables with a uniform method of pcm level by 16 to quantify: 1) demand from SQNR, the sequence of the first five values, the corresponding quantization value and the corresponding code word. 2) draw quantization error (defined as the import value and quantify the value of the difference between), at the same time draw to quantify the value of the import value as a function of the map. 3) 128 to quantify the number of redo-level 2) title, the results of the comparison.
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Size: 4096 |
Author: jin |
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Description: 产生长度为1000的标准正太分布的随机信号，画出时域波形及频谱；
采用u=255的非均匀PCM编码，每符号为8bit，画输入-输出关系图；
计算信号量化噪声比（SQNR）；
信道误码率为10-3；
解码，并画出u律反变换后的信号时域波形及频谱。
扩展要求：
采用均匀PCM、量化级数可变、信道误码率可变。
- have a standard length of 1000 is too random signal distribution, draw time-domain waveform and frequency spectrum u = 255 using the non-uniform PCM encoding, each symbol for 8bit, drawing input- output relationship diagram calculated quantization noise signal than (SQNR) channel bit error rate of 10-3 decoder, and law to draw u the signal after the inverse transform time-domain waveform and frequency spectrum. Expansion of the requirements: uniform PCM, quantization level variable, a variable channel bit error rate.
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Size: 2048 |
Author: louzhu |
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Description: 一。产生长度为500的零均值，单位方差的高斯随机变量序列，用均匀pcm的方法用16电平进行量化：1）求所得的SQNR，该序列的前5个值，相应的量化值和相应的码字。2）画出量化误差（定义为输入值和量化值之间的差），同时 画出量化值作为输入值的函数的图。3）用128量化电平数重做2）题， 比较结果。
二。产生一个长度为500，按N(O,1)分布的随机变量序列，分别用16，128量化电平数和u=255的u律非线性进行量化，画出每种情况下量化器的误差和输入-输出关系，并求SQNR.
三。长度为500的非平稳序列a由两部分组成：前20个样本是按照均值为零和方差为400的高斯随机变量产生的，其余480个样本是根据均值和方差为1的高斯随机变量产生的，对这个序列分别用均匀pcm和非均匀pcm方法进行128电平量化，试比较两种情况下所得到的SQNR。
-One. Have a length of 500 zero mean, unit variance Gaussian random variables with uniform pcm way to quantify the level with a 16: 1) Find the income SQNR, the sequence of the first 5 values, the corresponding quantization value and the corresponding codeword. 2) Draw the quantization error (defined as the input value and quantify the difference between the values), and draw quantitative values as a function of input graph. 3) redo 128 the number of quantization level 2) title, compare the results.
II. Produce a length of 500, according to N (O, 1) distributed random variables, respectively 16,128 and the number of quantization level of u u = 255 to quantify non-linear law, draw each case quantizer error and input- output relationships, and seek SQNR.
III. Length of the non-stationary series is a 500 consists of two parts: the first 20 samples in accordance with zero mean and variance of 400 generated Gaussian random variable, and the remaining 480 samples are based o
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Size: 4096 |
Author: sun |
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Description: 1、用Matlab绘制带通信号图形
2、用Matlab对模拟信源进行均匀量化
3、用Matlab编制一个函数实现均匀PCM量化编码，并计算量化噪声比(SQNR)
4、用Matlab对不同的量化级数计算出相应的量化噪声比-1, drawn using Matlab graphics bandpass
2, the simulation using Matlab source for uniform quantization
3, prepared using Matlab function to achieve a uniform PCM quantization coding, and calculate the quantization noise ratio (SQNR)
4, using Matlab on a different series to calculate the corresponding quantitative quantization noise ratio
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Size: 23552 |
Author: 王员根 |
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Description: For a file(.wave)
• Find the sampling frequency and the number of bits per sample.
• Re-quantize the samples using the following methods:
o Linear Quantization
o A-Law Companding with A=87.6
o μ-Law Companding with μ=255
• Use a mid-rise quantizer with 4, 5, 6, 7, and 8 bits per sample.
• Obtain the signal-to-quantization noise ratio (SQNR) for each of the
above 15 cases.
• It is required to plot the SQNR (dB) versus the number of bits per
sample for linear quantization, A-law companding, and μ-law
companding. All 3 plots may be on the same figure, if convenient.
-For a file(.wave)
• Find the sampling frequency and the number of bits per sample.
• Re-quantize the samples using the following methods:
o Linear Quantization
o A-Law Companding with A=87.6
o μ-Law Companding with μ=255
• Use a mid-rise quantizer with 4, 5, 6, 7, and 8 bits per sample.
• Obtain the signal-to-quantization noise ratio (SQNR) for each of the
above 15 cases.
• It is required to plot the SQNR (dB) versus the number of bits per
sample for linear quantization, A-law companding, and μ-law
companding. All 3 plots may be on the same figure, if convenient.
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Size: 1024 |
Author: mshmsha |
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Description: 通信原理课程设计，对信号进行量化编码，计算SQNR信号量化噪声比，信号功率，量化噪声功率信号量化噪声比-Communication theory curriculum design, signal quantization coding to calculate the SQNR signal quantization noise ratio, signal power, the quantization noise power signal to quantization noise ratio
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Size: 1024 |
Author: zhangchen |
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Description: 产生一个正弦信号，用均匀PCM方法分别用8电平和16电平做量化，在同一坐标轴画出原信号和已量化信号，比较两种情况下的SQNR-the matlab source code of U_pcm
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Size: 1024 |
Author: lizhsh |
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Description: over sampling,quantization error
SQNR
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Size: 4096 |
Author: mohamedomar |
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Description: sqnr signal to quantization error ratio
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Size: 293888 |
Author: mohamedomar |
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Description: SQNR的数字信号系统的全仿真，在matlab下可以直接运行。-The simulation of digital signal system of SQNR, can be run directly under matlab.
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Size: 1024 |
Author: c51com |
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Description: SQNR with quantization clipping to obtain SQNR and Clipping levels
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Size: 1024 |
Author: sanjay |
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Description: 计算OFDM的信号与量化噪声比，程序完整，可以直接运行-OFDM signal to quantization noise ratio calculation, program integrity, and can be run directly
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Size: 1024 |
Author: 猪 |
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Description: Implementation and Signal to Quantize noise ratio (SQNR) in Pulse code modulation using Matlab. Also compared A-law, u-law, companding.-Implementation and Signal to Quantize noise ratio (SQNR) in Pulse code modulation using Matlab. Also compared A-law, u-law, companding.
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Size: 5120 |
Author: ajay |
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