scholarly journals Performance Evaluation and Simulation of M-Ary Quadrature Amplitude Modulation Schemes with VisSim/Comm Software

2019 ◽  
Vol 3 (2) ◽  
pp. 58-63
Author(s):  
Husham Jawad Ahmad
Keyword(s):  
Amplitude Modulation ◽  
High Efficiency ◽  
Additive White Gaussian Noise ◽  
Quadrature Amplitude Modulation ◽  
Simulation Techniques ◽  
Error Ratio ◽  
Modulation Techniques ◽  
Qam Modulation ◽  
Bit Error Ratio ◽  
Modulation Schemes

M-ary modulation schemes are considered one of widely used digital modulation in practice because of its high efficiency in power and bandwidth. Therefore, this necessity the need to study and evaluate the performance of M-ary schemes using simulation techniques. In this paper, the performance of M-ary modulations schemes M-ary quadrature amplitude modulation (QAM) is considered. Because of its efficiency in power and bandwidth, M-ary QAM (M-QAM) is one of the widely used modulation techniques in practice. Therefore, a need for studying and evaluating the performance of QAM modulation schemes is an important task for designers. In this paper, M-QAM modulation schemes for even number of bits per symbol (16, 62, and 256-QAM) and an odd number of bits per symbol (32- and 128-QAM), over Additive White Gaussian Noise channel, are studied. A VisSim/Comm simulation[1] model for M-QAM is designed. Theoretical and simulation results for bit error ratio (BER) performance of QAM modulation schemes are obtained using VisSim/Comm software. The results are evaluated and compared.

scholarly journals Modulasi Digital Menggunakan Matlab

2012 ◽  
Vol 4 (2) ◽  
pp. 1
Author(s):  
Wahyu Pamungkas ◽  
Anggun Fitrian Isnawati ◽  
Adi Kurniawan
Keyword(s):  
Amplitude Modulation ◽  
Additive White Gaussian Noise ◽  
Quadrature Amplitude Modulation ◽  
Ratio Method ◽  
Error Ratio ◽  
Bit Error Ratio ◽  
Before And After ◽  
Shift Keying ◽  
Performance Results

In telecommunication systems, the determination of the modulation system is an important method in the process of sending information from transmitter to receiver. In the simulation that is done using QPSK modulation system (Quadrature Phase Shift Keying), 8-QAM (Quadrature Amplitude Modulation), 16-QAM (16-Quadrature Amplitude Modulation) that uses AWGN (Additive White Gaussian Noise) channel in the transmission system uses MATLAB software. The execution of the simulation is aimed to describe how the characteristics of the waveform of each block of the modulator, to add noise in the AWGN channel and demodulator. Performance of modulation system testing is used BER (bit error ratio) method. Looking of the faults of comparison bits results of before and after the transmitted bits by using Monte Carlo simulation model. Testing on this simulation using the input data as much as 10.000 data symbols randomly and the level of Eb/No that is various for each modulation used. Performance results BER with the level of Eb / No at 1 dB of the simulated system modulation on the BER values obtained for QPSK 0.0570, 8-QAM at 0.1085 while the 16-QAM at 0.1582 and then the performance of QPSK modulation is the best. If the Eb / No is increased to 8 dB then the becomes BER QPSK smaller modulation is equal to 0.00035, the 8-QAM BER obtained at 0.0076, while the 16-QAM modulation to be 0.0139

scholarly journals A Quadrature Amplitude Modulation Receiver Model with Matched Filters

2020 ◽  
Vol 11 (10) ◽  
Author(s):  
Serkan Yakut
Keyword(s):  
Amplitude Modulation ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Additive White Gaussian Noise ◽  
Local Area ◽  
Quadrature Amplitude Modulation ◽  
Rectangular Pulse ◽  
Matched Filters ◽  
The Time Domain ◽  
4G Lte

In this study, it is mathematically shown that the detector inputs obtained using the matched filters in the Quadrature Amplitude Modulation (QAM) receiver are the same expressions as those obtained using the integrators if a rectangular pulse is used in the transmitter and the channel is Additive White Gaussian Noise (AWGN). Under the assumption that there is a perfect synchronization between the transmitter and the receiver. QAM is intensively used at the present time for the data transmission on subchannels in orthogonal frequency-division multiplexing (OFDM) communication systems such as digital subscriber lines (DSLs) modems, wireless local area networks (WLANs) and cellular wireless communication systems (e.g. 4G LTE). Cyclic-prefix OFDM is deployed in 4G LTE systems and the rectangular pulse is used in the time domain to shape all subcarriers of OFDM.

scholarly journals COMPARATIVE STUDY AND ANALYSIS OF BER OF CDMA FOR DIFFERENT MODULATION SCHEME

2014 ◽  
Vol 12 (8) ◽  
pp. 3839-3843 ◽  
Author(s):  
Arun Kumar ◽  
Dr. Manisha Gupta
Keyword(s):  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Mobile Terminal ◽  
Modulation Scheme ◽  
Channel Quality ◽  
Modulation Techniques ◽  
Efficient Data ◽  
Modulation Schemes ◽  
Increasing Demand ◽  
Filtration Technique

With the increasing demand in wireless communication, it has become necessary to give better and efficient service to users by using better technique. This paper propose and analyse the bit error rate of CDMA, for different modulation schemes such as BPSK, QPSK and QAM. By Choosing a reliable modulation scheme and better filtration Technique the enhancement of the performance can be obtained in transmitter and receiver of CDMA system. Simulated result is shown to analyse and compare the performance of these systems by using additive white Gaussian noise channel (AWGN).Finally the different modulation schemes is compared on the basis of BER and best modulation scheme is determined.  From analysis of three modulation techniques, the system could use more appropriate modulation technique to suit the channel quality, thus we can deliver the optimum and efficient data rate to mobile terminal.

scholarly journals Symbol Error-Rate Analytical Expressions for a Two-User PD-NOMA System with Square QAM

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2153
Author(s):  
Yakov V. Kryukov ◽  
Dmitriy A. Pokamestov ◽  
Serafim A. Novichkov
Keyword(s):  
Error Rate ◽  
Amplitude Modulation ◽  
Multiple Access ◽  
Additive White Gaussian Noise ◽  
Time Spectrum ◽  
Symbol Error Rate ◽  
Quadrature Amplitude Modulation ◽  
Power Domain ◽  
Power Weights ◽  
Analytical Expressions

Power domain non-orthogonal multiple access (PD-NOMA) is one of the most perspective multiplexing technologies that allows improving the capacity of actual networks. Unlike orthogonal multiple access (OMA), the PD-NOMA non-orthogonally schedules multiple users in the power domain in the same orthogonal time-spectrum resource segment. Thus, a non-orthogonal multiplexed signal is a combination of several user signals (usually, modulation and coding schemes (MCS) based on quadrature amplitude modulation) with different power weights. The symbol error rate (SER) and bit error rate (BER) performances are one of the main quality characteristics of any commutation channel. The issue is that a known analytical expression for BER and SER calculation for conventional OMA cannot be applied in terms of the PD-NOMA. In the following work, we have derived the SER and BER analytical expressions for gray-coded square quadrature amplitude modulation (QAM) user channels that are transmitted in two-user PD-NOMA channel under additive white Gaussian noise (AWGN). Through the simulation, the verification of the provided expressions is presented for four multiplexing configurations with various user power weights and QAM order combinations.

A Study of Different Forms of Dual Polarization – Quadrature Amplitude Modulation and its Performance Analysis in Terms of Q-Factor and Distance

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Vipanpreet Kaur ◽  
Amandeep Singh Sappal
Keyword(s):  
Performance Analysis ◽  
Amplitude Modulation ◽  
Quadrature Amplitude Modulation ◽  
Q Factor ◽  
Dual Polarization ◽  
Modulation Schemes

AbstractIn this paper, dual polarization has been studied along with different forms of quadrature amplitude modulation schemes. Also the comparison of various QAMs (QPSK, DP-16QAM, DP-32QAM, DP-64QAM, DP-128QAM) is carried out in terms of Q-factor and distance.

scholarly journals An effective integration of the PM 16-QAM modulation in enhanced metropolitan networks with the EDFA amplification

2020 ◽  
Vol 71 (5) ◽  
pp. 317-325
Author(s):  
Rastislav Róka ◽  
Pavol Šalík
Keyword(s):  
Amplitude Modulation ◽  
Optical Transmission ◽  
Quadrature Amplitude Modulation ◽  
Simulation Platform ◽  
Optical Components ◽  
Modulation Format ◽  
System A ◽  
Qam Modulation ◽  
Metropolitan Networks ◽  
Effective Integration

Abstract This paper deals with the integration of polarization multiplexed 16-ary quadrature amplitude modulation format in optical metropolitan networks enhanced with the signal amplification. Before expensive experimental setup or practical testing and demonstration, we prefer creating of appropriate simulation platform for the optical transmission system. A novelty can be found in adjusting, optimizing and construction of the proposed optical system and functional parts for any modulation format used. So, such simulation platform is first introduced along with possibilities for numerical simulations of its optical components - laser and amplifier. By this way, essential noise tolerances for comparison with the data under real conditions are included. Subsequently, there are characterized implementations of terminal devices in detail with a possibility for upgrading to the dual-polarization mode operation. Finally, simulation results from the simulation platform are presented and a discussion about demands for effective exploitation of the polarization multiplexed 16-ary quadrature amplitude modulation in enhanced optical metropolitan networks concludes our contribution.

STOCHASTIC RESONANCE SIGNAL PROCESSOR: PRINCIPLE, CAPACITY ANALYSIS AND METHOD

2007 ◽  
Vol 17 (02) ◽  
pp. 631-639 ◽  
Author(s):  
SHUIFA SUN ◽  
SAM KWONG
Keyword(s):  
Stochastic Resonance ◽  
Additive White Gaussian Noise ◽  
Pulse Amplitude ◽  
Bit Rate ◽  
Resonance Signal ◽  
Noise Simulation ◽  
Error Ratio ◽  
Bit Error Ratio ◽  
Base Band ◽  
Signal Processor

In this letter, a signal processor based on the bistable aperiodic stochastic resonance (ASR), that can be used to detect the base-band binary pulse amplitude modulation (PAM) signal transmitting over an additive white Gaussian noise (AWGN) channel, is studied. The principle of the ASR signal processor is analyzed and the information capacity of such a communication system is evaluated by the Bit Error Ratio (BER) and the bit rate, according to the well-known Shannon information theory. The roles played by the noise on this capacity are analyzed. It is observed that keeping the bit rate unchanged we can neither decrease BER nor increase the bit rate and keep BER unchanged by adjusting the density of the noise. Simulation results also agree well with this observation. In addition, a statistical method to improve the performance of the system is proposed with theory and experiment.

Performance Analysis of Multiple FEC Channel Coding Algorithms for Software Defined Radio Using Quadrature Amplitude Modulation

2016 ◽  
Vol 7 (2) ◽  
pp. 1-15 ◽  
Author(s):  
Nikhil Marriwala ◽  
O. P. Sahu ◽  
Anil Vohra
Keyword(s):  
Amplitude Modulation ◽  
Turbo Codes ◽  
Channel Coding ◽  
Software Defined Radio ◽  
Communication Systems ◽  
Forward Error Correction ◽  
Additive White Gaussian Noise ◽  
Original Data ◽  
Quadrature Amplitude Modulation ◽  
Experimental Result

This paper describes the development of a Software Defined Radio (SDR)-based Transceiver simulation model using Quadrature Amplitude Modulation (QAM) Scheme and analyze its performance using Forward Error Correction (FEC) channel coding algorithms namely the Convolution and the Turbo Codes. This model efficiently evaluates the performance of high data rate multi array M-QAM, schemes. The performance of these FEC codes is evaluated when the system is subjected to noise and interference in the channel. In this design Additive White Gaussian Noise (AWGN) channel has been considered. The design is analyzed using Bit Error Rate (BER) and Signal to Noise Ratio (SNR) for different M-QAM techniques. The simulation results give a possible solution for future SDR systems which may be used in various wireless communication systems. An experimental result shows that the QAM transceiver achieves the transmission of data at high level accurately. FEC Channel coding scheme is used wherever the re-transmission of the data is not feasible. On the receiver side, this channel coded signal is decoded in order to get back the original data even if the channel coded signal undergoes some interference from the noise in the transmission medium. The Performance is then analyzed in terms of BER for Convolution Coding and Turbo Coding algorithm at a particular value of SNR in LabVIEW graphical programming. Finally, comparison has been drawn based on different parameters between the existing SDR system and the proposed design in this paper to analyze and highlight the effectiveness of the proposed SDR design.

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