在本文中,我们将使用MATLAB对16-QAM调制和解调进行仿真,并分析在加性白高斯噪声(AWGN)环境下的系统性能。 16-QAM基本原理 16-QAM (16-Quadrature Amplitude Modulation) 是一种常见的数字调制技术。在16-QAM中,“16”表示符号的总数,每个符号代表4个比特(因为24=1624=16)。也就是说,每个符号可以携带4个比特的...
分层调制(Hierarchical Modulation, HM)是一种用于提高数字通信系统灵活性和效率的技术。它通过将数据分成不同优先级的多层,并针对不同层使用不同的调制和编码方案,从而在确保高优先级数据可靠传输的同时,尽可能提高低优先级数据的吞吐量。本研究将重点探讨HM 4/16 QAM(Quadrature Amplitude Modulation,正交幅度调制)的...
matlab % 参数设置 m = 16; % 调制阶数 data = randi([0 m-1], 1, 100); % 随机生成数据 % QAM调制 moddata = qammod(data, m); % 绘制星座图 scatterplot(moddata); title('16-QAM Constellation Diagram'); xlabel('In-phase'); ylabel('Quadrature'); 在这段代码中,我们首先设置了调制阶...
Input signal, specified as a scalar, vector, matrix, or array. The elements of this input signal must be binary values or integers in the range[0, (M– 1)], whereMis the modulation order. Note To process input signal as binary elements, specifyInputType='bit'. For binary inputs, the...
TheModulation chnologyofQAMAndTh Simul tionin tl b (吉首大学)杨辉媛李云红涂成军 YANGHui-yuanLIYun-hongTUCheng-jun 摘要:文章首先概述了QAM调制技术的原理,然后重点介绍了QAM调制技术在有线电视系统中的作用和意义,并且对QAM 的频道设置和输出进行了说明。文章还利用MATLAB对基于QAM的数字通信系统进行仿真,得到...
Y= qammod(X,M)modulates input signalXby using QAM with the specified modulation orderM. example Y= qammod(X,M,symOrder)specifies the symbol order. example Y= qammod(___,Name=Value)specifies options using name-value arguments in addition to any of the input argument combinations from previ...
The comm.GeneralQAMModulator System object uses the general quadrature amplitude modulation (QAM) method to modulate a signal.
仿真结果表明这种通过MATLAB 实现的数字通信系统具有较强的可实现性，为实际应用和科学合理地设计正交幅度调制系统,提供了高效的仿真平台。关键词：调制；QAM ；MATLAB 中图分类号：TN914.3 文献标识码：A The Modulation Technology of QAM And The Simulation in Matlab Yanghuiyuan Liyunhong Tuchengjun (...
This paper introduce the Bit error rate (BER) simulation using 16QAM (Quadrature Amplitude Modulation) in Matlab. Bit error rate is used to assess systems which can transmit digital data from one address to other address. BER is a unitless performance measure, often expressed as a percentage....
Qam_modulation function [yy1, yy2]=Qam_modulati on(x) N=le ngth(x); a=1:2:N; y1=x (a); y2=x(a+1); a=1:2:N/2; temp11=y1(a); temp12=y1(a+1); y1仁temp11*2+temp12; temp2仁y2( a); temp22=y2(a+1); y22=temp21*2+temp22; yy1(fi nd(y11==0))=-3; yy...