152 performance analysis of different qam techniques using rician fading channel · 2018-12-24 ·...

International Journal of Trend in

International Open Access Journal

ISSN No: 2456

@ IJTSRD | Available Online @ www.ijtsrd.com

Performance Analysis Using

Prerna Amlavad, Mukesh PtidarDepartment of Electronics and Communication

Lakshmi Narain College

ABSTRACT Wireless communications is one of the most active areas of technology development of our time. This development is being driven primarily by the transformation of what has been largely a medium for supporting voice telephony into a medium for supporting other services, such as the transmission of video, images, text, and data. In this paper QAM modulation techniques used for calculation of SNR with MIMO system using fading channel. This work presents, a simulation toll MATLAB R2013a to study the performance analysis of Bit Error rate (BER) V/S Signal to Noise ratio (SNR). Key Words: BER, Fading Channel, MIMO System, QAM Modulation, SNR etc I. INTRODUCTION The wireless communication history, every generation of computers get advanced with new frequency bands, high data rates and non backwards compatible transmission technology. Here as we know 4G is a successor of 3G, i.e. 4G provides internet broadband in computer devices and other mobile devices .Some of the other features you use now are dayit like High definition Mobile TV, Video conferencing, video calling, accessing mobile internet, IP Telephony (Voice Over Internet Protocol [VIOP] it is the group of technologies which is used to deliver the voice communication through the iprotocol).

International Journal of Trend in Scientific Research and Development (IJTSRD)

International Open Access Journal | www.ijtsrd.com

ISSN No: 2456 - 6470 | Volume - 3 | Issue – 1 | Nov

www.ijtsrd.com | Volume – 3 | Issue – 1 | Nov-Dec 2018

Performance Analysis of Different QAM TechniquesUsing Rician Fading Channel

Prerna Amlavad, Mukesh Ptidar Department of Electronics and Communication,

in College of Technology (LNCT), Indore, Madhya Pradesh

ireless communications is one of the most active areas of technology development of our time. This development is being driven primarily by the transformation of what has been largely a medium for supporting voice telephony into a medium for

er services, such as the transmission of video, images, text, and data. In this paper QAM modulation techniques used for calculation of SNR with MIMO system using fading channel. This work presents, a simulation toll MATLAB R2013a to study

analysis of Bit Error rate (BER) V/S

BER, Fading Channel, MIMO System,

The wireless communication history, every generation frequency bands,

high data rates and non backwards compatible transmission technology. Here as we know 4G is a successor of 3G, i.e. 4G provides internet broadband in computer devices and other mobile devices .Some of the other features you use now are days are parts of it like High definition Mobile TV, Video

accessing mobile internet, (Voice Over Internet Protocol [VIOP] it

which is used to deliver the voice communication through the internet

Fig.1: WiMAX System The revisions of the IEEE 802.16 standard fall into two categories: � Fixed WiMA X, also called

provides for a fixed-line connection with an antenna mounted on a rooftop, like a TV antenna. Fixed WiMAX operates in the 2.5 GHz and 3.5 GHz frequency bands, which require a licence, as well as the licence-free 5.8 GHz band.

� Mobile WiMAX , also calledallows mobile client machines to be connected to the Internet. Mobile WiMAX opens the doormobile phone use over IP, and even highmobile services.

A. MIMO–OFDMA MIMO–OFDMA is a combination of downlink MIMO transmission and OFDM based multiple accesses. In multiple inputs multiple output (MIMO) communication System exploits the degree

Research and Development (IJTSRD)

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1 | Nov – Dec 2018

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Techniques

Madhya Pradesh, India

1: WiMAX System

The revisions of the IEEE 802.16 standard fall into

, also called IEEE 802.16-2004, line connection with an

antenna mounted on a rooftop, like a TV antenna. WiMAX operates in the 2.5 GHz and 3.5

GHz frequency bands, which require a licence, as free 5.8 GHz band. , also called IEEE 802.16e,

allows mobile client machines to be connected to the Internet. Mobile WiMAX opens the doors to mobile phone use over IP, and even high-speed

OFDMA is a combination of downlink MIMO transmission and OFDM based multiple

In multiple inputs multiple output (MIMO) communication System exploits the degrees of

International Journal of Trend in Scientific Research and Development (IJTSRD) ISSN: 2456


freedom introduced through multiple transmitted and received antenna to offer high spectral efficiency. In narrow band channels, when channels state information is available at the transmitter and instantaneous adaptation is possible, the capacity attaining distribution is found by using the wellknown water filling algorithm.

Fig. 2: MIMO- OFDMA System Model

III. SIMULATION RESULTS FOR

DIFFERENT QAM SYSTEM WITH DIFFERENT CHANNEL

In this paper work consider following input parameters are shown in table 1. The different



freedom introduced through multiple transmitted and received antenna to offer high spectral efficiency. In narrow band channels, when channels state information is available at the transmitter and instantaneous adaptation is possible, the capacity

aining distribution is found by using the well-

OFDMA System Model

B. 4-QAM The 4-state Quadrature amplitude modulation (4QAM) is a QAM with M=2 voltage levels or possible states for the signal. QAM transmits k bits of information during each symbol period, where k=log2M=2 bits, that is M=2symbol rate is half of the bit rate, producing a spectrally efficient transmissionQuadrature amplitude modulation (16QAM with M=16 voltage levels or possible states for the signal, that is, four I value Q values. QAM transmits k bits of information during each symbol period, where k=log2M=4 bits, that is M=2consisting of two bits for I and two bits for Q. And the symbol rate is one fourth of the bit rate, producing a very spectrally efficient transmission. II. BLOCK DIAGRAM OF SIMULATION

MODEL The simulation system is shown in figure below, the system will be developed the MIMOusing MATLAB. The adaptive modulation controller is receiving signal number of transmission and number of receiver and SNR, in control OFDM transmission and OFDM receiver signal. shown in simulation & result section of the paper clarify the process shown in the system model.

Fig. 3: System Block Diagram

SIMULATION RESULTS FOR DIFFERENT QAM SYSTEM WITH

work consider following input 1. The different

modulation scheme are consider like (4QAM and 64-QAM), with Rician Carrier rate is ½ with FFT size 256 consider. The project work done by using simulation R2013a Used.

International Journal of Trend in Scientific Research and Development (IJTSRD) ISSN: 2456-6470

Dec 2018 Page: 1124

state Quadrature amplitude modulation (4-QAM) is a QAM with M=2 voltage levels or possible states for the signal. QAM transmits k bits of information during each symbol period, where

M=2 bits, that is M=2k. In this condition the half of the bit rate, producing a

spectrally efficient transmission. The 16-state Quadrature amplitude modulation (16-QAM) is a QAM with M=16 voltage levels or possible states for the signal, that is, four I value Q values. QAM

ion during each symbol M=4 bits, that is M=2k,

consisting of two bits for I and two bits for Q. And the symbol rate is one fourth of the bit rate, producing a very spectrally efficient transmission.

BLOCK DIAGRAM OF SIMULATION

The simulation system is shown in figure below, the system will be developed the MIMO-OFDM system using MATLAB. The adaptive modulation controller is receiving signal number of transmission and number of receiver and SNR, in control OFDM

OFDM receiver signal. The graphs shown in simulation & result section of the paper clarify the process shown in the system model.

modulation scheme are consider like (4-QAM, 16-with Rician Channel. The

Carrier rate is ½ with FFT size 256 consider. The project work done by using simulation tool MATLAB



Table: Parameters

Communication ChannelModulation TechniquesIFFT (Input port size)CC Code Rate Radio TechnologyUsed Scheme Model Calculation ParametersSimulation-Used Tool/Software

Rician fading best describes a situation where a dominant non-fading, line-of-sight (LOS), component is present in addition to a number of indirect multipath signals. The fading envelope of this model is described by Rician probability density function

Fig: 4: BER performance of different QAM IV. RESULT ANALYSIS AND CONCLUSIONIn this performance, we have used the scheme with communication Rician channel and different modulation techniques. The performance is displayed in figure 4 in terms of the BER verses SNR logarithmic plot. In the fig. 4 in this plot we analysis the 32-QAM, SNR is increased 4.1 dB on BER at 10

�� as compared to 16-QAM and Modulation

Techniques.

-5 010

-4

10-3

10-2

10-1

100

BE

R

BER performance of QAM-OFDM over RICIAN channel



Table: 1 The Simulation parameter Parameters Value

Communication Channel Fading Modulation Techniques 4-QAM, 8-QAM and 16-QAMIFFT (Input port size) 256

1/2 Radio Technology OFDM

Alamouti WiMAX 802.16e

Calculation Parameters BER V/s SNR Used Tool/Software Matlab (R2013a)

Rician fading best describes a situation where a sight (LOS), component

is present in addition to a number of indirect multipath signals. The fading envelope of this model is described by Rician probability density function

(PDF). The performance of simulation results are fairly equals to theoretical results. The four color lines indicate the different QAM levels. The used communication channel Rician with QAM show in figure. 4.

BER performance of different QAM-OFDM over RICIAN

RESULT ANALYSIS AND CONCLUSION In this performance, we have used the Alamouti

communication Rician channel and different modulation techniques. The performance is

in terms of the BER verses SNR in this plot we analysis

QAM, SNR is increased 4.1 dB on BER at AM and Modulation

References: 1. Mehdi Ahmadi, EhsanRohani, Pooya

Monshizadeh Naeeni and Sied Mehdi Fakhraie, “Modeling and Performance Evaluation of IEEE 802.22 Physical Layer”. 2nd International Conference on Future Computer and Communication (ICFCC) ISBN: 978-1-4244-5821-9, 213 V3-62 - V3-66, INSPEC Accession Number : 11538274

5 10 15 20SNR


QAM-4

QAM-8QAM-16

QAM-32


Dec 2018 Page: 1125

QAM

The performance of simulation results are fairly equals to theoretical results. The four color lines indicate the different QAM levels. The used communication channel Rician with QAM show in

over RICIAN

Mehdi Ahmadi, EhsanRohani, Pooya d Sied Mehdi Fakhraie,

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152 performance analysis of different qam techniques using rician fading channel · 2018-12-24 ·...

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