scholarly journals Performance Evaluation on the Basis of Bit Error Rate for Different Order of Modulation and Different Length of Subchannels in OFDM System

2014 ◽  
Vol 4 (3) ◽  
pp. 33-41 ◽  
Author(s):  
Sutanu Ghosh
Keyword(s):  
Performance Evaluation ◽  
Bit Error Rate ◽  
Error Rate ◽  
Ofdm System ◽  
Different Order

scholarly journals Performance Enhancement of Coherent Optical OFDM System Using LMS Algorithm

2020 ◽  
Vol 1 ◽  
pp. 1-5
Author(s):  
Manisha Bharti
Keyword(s):  
Phase Noise ◽  
Bit Error Rate ◽  
Error Rate ◽  
Orthogonal Frequency Division Multiplexing ◽  
Performance Enhancement ◽  
Lms Algorithm ◽  
Frame Structure ◽  
Least Mean Square ◽  
Ofdm Systems ◽  
Ofdm System

Instability of the local oscillator causes phase noise – a phenomenon that is a disadvantage and is considered to be a major obstacle in the functioning of coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. An attempt has been made in this paper to reduce the effects of common phase errors generated by phase noise. In this paper, a least mean square (LMS) based algorithm is proposed for estimation of phase noise. Using this proposed algorithm, the major problem of phase ambiguity caused by cycle slip is avoided and the bit error rate is greatly improved. Further, there is no requirement for modifying the frame structure of OFDM using this algorithm. A CO-OFDM system with the 8-PSK technique is used to implement the algorithm concerned. Furthermore, the algorithm, using the 8-PSK modulation technique, is analyzed and compared with the existing QPSK technique and with other algorithms. The investigations reveal that 8-PSK outperforms existing LMS algorithms using other techniques and significantly reduces the bit error rate.

scholarly journals A Generalized Bit Error Rate Evaluation for Index Modulation Based OFDM System

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 70082-70094 ◽  
Author(s):  
Mahmoud Abdullahi ◽  
Aijun Cao ◽  
Adnan Zafar ◽  
Pei Xiao ◽  
Ibrahim A. Hemadeh
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Ofdm System ◽  
Rate Evaluation ◽  
Index Modulation

Design and Simulation of OFDM System Based on Matlab

2014 ◽  
Vol 635-637 ◽  
pp. 1081-1085
Author(s):  
Xin Xin Sha ◽  
Jian Zhou ◽  
Yuan Xue Song
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Channel Coding ◽  
Signal To Noise Ratio ◽  
Average Power ◽  
System Structure ◽  
Power Ratio ◽  
Basic System ◽  
Ofdm System ◽  
Signal To Noise

OFDM is a key modulation and multiplexing technique. The basic system structure of OFDM is introduced firstly. This paper chose appropriate implementation schemes for channel coding, PAPR(Peak To Average Power Ratio) reducing and synchronization of the OFDM system based on the minimum BER(Bit Error Rate). Finally, the paper realized the simulation and got the BER in different SNR(Signal To Noise Ratio) in the matlab environment .

Simulation Implementation and Analysis of the OFDM Modulated by MPSK and M-QAM

2014 ◽  
Vol 543-547 ◽  
pp. 2221-2224
Author(s):  
Li Ming Yang ◽  
Jia Guo ◽  
Hong Wei Ding ◽  
Yong Wang ◽  
Yi Fan Zhao
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Ofdm System ◽  
Channel Simulation ◽  
Rayleigh Channel ◽  
Simulation Results

Simulated for OFDM system modulated by 16PSK, 16QAM and 64QAM, and then we compared and analyzed their performance in the Rayleigh channel and 2 paths Rayleigh channel. Simulation results show that under the same conditions, Bit Error Rate (BER) of MQAM modulation system is lower than the same order MPSKs

A Fast Adaptive Transmit Power and Bit Allocation in OFDM System

2013 ◽  
Vol 765-767 ◽  
pp. 444-447
Author(s):  
Juan Wen ◽  
Qi Ming Tian
Keyword(s):  
Theoretical Analysis ◽  
Bit Error Rate ◽  
Error Rate ◽  
Bit Allocation ◽  
Ofdm System ◽  
Transmit Power ◽  
Allocation Algorithm ◽  
Bisection Algorithm ◽  
Simulation Results ◽  
Adaptive Transmit Power

In this paper, we propose a fast and optimal adaptive transmit power and bit allocation algorithm, which is called Bisection Searching Level (BSL) for wireless OFDMA systems. The algorithm aims at maximization of data rate under the constraints of total transmit power and bit error rate (BER). BSL is based on water pouring approach, and adopt bisection algorithm to find the water pouring level under discrete bit restriction. Both theoretical analysis and simulation results demonstrate the optimality of our proposed algorithm.

scholarly journals Duty-cycle-division-multiplexing: Bit error rate estimation and performance evaluation

2009 ◽  
Vol 16 (4) ◽  
pp. 422-425 ◽  
Author(s):  
Ghafour Amouzad Mahdiraji ◽  
Mohamad Khazani Abdullah ◽  
Makhfudzah Mokhtar ◽  
Amin Malekmohammadi ◽  
Ahmad Fauzi Abas
Keyword(s):  
Performance Evaluation ◽  
Bit Error Rate ◽  
Error Rate ◽  
Duty Cycle ◽  
Rate Estimation ◽  
And Performance
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