16-qam modulation

10 次查看（过去 30 天）
jordi10
jordi10 2011-1-27
I have a problem with 16qam modulation. I want to modulate with 16qam a binary signal and as I know 16-qam supposed to separate the signal into groups of 4 bits and maps them each one to a complex number. The problem is that I try to do this with 16 bits but I don't take 4 complex numbers but 16! I give you the code to understand better. Thank you and sorry for my English!
clear all
close all
clc
ip = [1 0 1 0 1 0 1 0]
%------ code ------%
trell = poly2trellis([7],[133 171])
coded = convenc(ip,trell)
%------ 16qam mode ------%
q = modem.qammod(16)
y = modulate (q,coded)
%------ 16qam demode ------%
z = modem.qamdemod(16)
x = demodulate (z,y)
%------ decode ------%
decoded = vitdec(x,trell,5,'trunc','hard')

请先登录，再回答此问题。

采纳的回答

Hrasek
Hrasek 2011-2-18
For modem.qammod must be decimal input. You have to use binary decimal converter on the input modem.qammod

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 QAM 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by