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# Qam Mod

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10 Threads found on edaboard.com: Qam Mod

## How to calculate EVM and MER if the noise in the signal has an RMS value of 0.4

I cant seem to find any information on how to do this problem, For a 16 qam mod signal how do i calculate EVM and MER if the noise in the signal has an RMS value of 0.4 and the phasor amplitude is 8v?

## plotting SNR vs BER for 4QAM modulation scheme

try harder doh click me. 8-O

## Problems with QAM/QPSK/MSK PassBand mod/demod

Hi all I tryed to program it myself but when I multiply the quadrature component by sin I get values that very close to 0, ( I do not have a problem when I choose low Carrier Freq) it's looks like this : imag(Y(n))*A*sin(2*pi*Fc*t); while Y(n) is the quadrature component and Fc is 10000Hz. When I multiplying the inphase component by

please can anybody help me in this matlap problem the required :::: * genearte large no of bits using randint * modulate the data once with bpsk & then 16-qam * bpsk mod is 2*data-1 * after modulation u should loop on the data with step of 64's each time calculating their ifft * add the noise to (...)

## Anyone Help Me in this matlap Code

please can anybody help me in this matlap problem the required :::: * genearte large no of bits using randint * modulate the data once with bpsk &amp;amp; then 16-qam * bpsk mod is 2*data-1 * after modulation u should loop on the data with step of 64's each time calculating their ifft * add the (...)

## Internal time vector- how to plot in time domain in Matlab?

Hello everybody! after using modulate(mod,tx) funchtion, we get the Internal Time Vector, right? so, then how to plot in time domain this signal in Matlab? for example: hmod = modem.qammod(M); M = 16; %16-qam tx = randint(500,1,M); % (...)

## AM, FM, PM Modulation Question

That is incorrect. FM uses the frequency to transmit information so your Amp can be completely saturated and still change freq. Phase mod is closely related to FM. You might be thinking of qam. Where you do have Phase and Amplitude being used to send data. Cheers

## Need help in matlab code

I hv tried to correct some mistakes but i'm was not able to run this code Pls help me Thank u pls substitue :) by : ) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % mod16qam.m %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function Y = mod16qam(X,Fd,Fs,Eb); % 16-qam (...)

## Whats the relation between FM and Phase modulation?

Analog phase modulation, i think you need a coherent receiver while FM does not. IN digital mod, most of them are phase modulation (PSK, QPSK, DQPSK, qam etc)

## 128/256QAM modulator/demodulator

Look Intersil site for Broadband wireless modems, modulation up to 128qam, speed up to 238 Mbps: this time this is more integrated solution for high speed wireless modems .....