PLL is a good way to do FM demodulation in analogue domain ,A PLL system can be used to implement an FM demodulator. When a PLL is locked on an FM signal, the VCO tracks the instantaneous frequency of that signal. Since the VCO output tracks the FM signal, and the VCO input voltage is proportional to the VCO output frequency, then the VCO input will be equal to the demodulated signal.

see more http://freecircuitdiagram2009/09/17/pll-fm-demodulator/ (circuit diagram and more)

A disadvantage of the PLL technique is that it trickier to get ....etc

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my help me..give me some suggestion on delta modulation & demodulation..send me some ppt on dis topic. ....etc

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Does anyone have a complete implementation of a PLL in Matlab (not Simulink)?
pls mail me at [email protected] ....etc

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HELLO i am NAVATHEJ doing MTECH in rnsit banglore and i am doing mini project on qpsk plz provide the page link to download about this project ....etc

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SYSTEM DESIGN USING PLL

Abstract:- This paper describes the novel structure of a phase locked loop, which is used in all designs to generate internal clock at a specified frequency. A phase-locked loop circuit responds to both the frequency and the phase of the input signals, automatically raising or lowering the frequency of a controlled oscillator until it is matched to the reference in both frequency and phase. A phase-locked loop is an example of a control system using negative feedback. A PLL compares the frequencies of two signals and ....etc

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To get full information or details of frequency modulation and demodulation ppt please have a look on the pages

https://en.wikipedia?title=Frequency_modulation

http://radio-electronicsinfo/rf-technology-design/fm-reception/fm-demodulation-detection-overview.php

http://ece.umd.edu/ tretter/commlab/c6713slides/ch8.pdf

if you again feel trouble on frequency modulation and demodulation ppt please reply in that page and ask specific fields in frequency modulation and demodulation ppt ....etc

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can you help me by providing matlab code for turbo coding of qpsk and qam?? ....etc

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The following code is for simulating non-coherent DPSK for M=2,4,8,16,32 (bits per symbol).

This code is extended from the examples available in the ebook.

% Iman Bagheri / December 2013 / [email protected]
% Simple Matlab/Octave code for non-coherent demodulation of
% differentially encoded phase shift keying (DPSK)
clc;clear all;close all;

% Input Fields
N = 1e6; % number of bits or symbols
EbN0dB = 6:2:16; % multiple Eb/N0 values
rangeofM = ; % DPSK constellation
colors=;
%

col ....etc

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Software implementation of coherent demodulation of audio (speech) signals



Sharad Kumar
Student Id 4114356
EE 4541 Digital Signal Processing Project
FINAL REPORT

abstract

INTRODUCTION

Demodulating a signal decomposes it into a slowly varying temporal envelope and a rapidly varying cosine (or fine structure--related to the instantaneous frequency of the signal). The motivation in representing a signal by envelope and fine structure comes from our desire to understand and model ....etc

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Hi,
visit this thread for digital fm demodulation using pll
http://seminarsprojects.net/Thread-digital-fm-demodulator-using-pll
or click here
Best of luck! ....etc

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