Performance Analysis by Improving Bit Error Rate (BER) through various Diversity Techniques in Wireless Communication (original) (raw)

Bit Error Rate (BER) Performance Enhancement Technique of a Wireless Fading Channel

Antenna diversity technique improves the instantaneous and average signal to noise ratio (SNR) by combining all the diversity branches. The channel noise and fading reduce the performance of any communication system through making loss of some information of the transmitted symbol. In this paper, we mathematically represented the effect of noise and multi-path fading on the transmitted signal. Then we performed a computer simulation study to show the BER performance of the fading channel and also showed how the BER performance of the fading channel could be improved by Antenna diversity technique.

DIVERSITY TECHNIQUES FOR WIRELESS COMMUNICATION

The users of the wireless communication demands for higher data rates, good voice quality and higher network capacity restricted due to limited availability of radio frequency spectrum, Bandwidth, Channel Capacity, physical areas and transmission problems caused by various factors like fading and multipath distortion.

An Overview of Diversity Techniques in Wireless Communication Systems

Fading problem is a major impairment of the wireless communication channel. In this paper we considers different techniques to mitigate the fading problem in wireless channel. The trivial solution for the fading problem would be to add a fading margin at the transmitter. However, this is not an efficient solution at all. One alternate solution is to take advantage of the statistical behavior of the fading channel. Here comes the basic concept of diversity; where two or more inputs at the receiver are used to get uncorrelated signals.

An overview and analysis of BER for three diversity techniques in wireless communication systems

Yugoslav Journal of Operations Research, 2015

Characteristics of a wireless communication channel are subjected to a large scale deterioration process, referred to as the problem of fading. This paper discusses different techniques for mitigating the fading problems. One solution to the problem is to add a fading margin on the transmitter, but it is not an effective solution. The other solution is to use an alternative statistical behavior of fading channels (applying the basic concepts of diversity), which use two or more inputs on the receiver to ensure the correlation of signal. So, the diversity technique is used to improve system performance in fading channels. Instead of transmitting and receiving the desired signal through one channel, we have L copies of desired signal transferred over M different channels. This paper presents analytical results of the probability of error for diversity techniques which use Rayleigh Fading Channel for BPSK modulation.

Diversity Technique And Modulation Method Used To Reduce Fading in Wireless Communication Pradeep

— Wireless communication has made everyone's life easy. Wireless network provides high speed mobility for data and voice signal. But wireless communication suffers from a problem namely fading, means multipath propagation of signal. Diversity is the technique used in wireless communication system to improve the performance over a communication channel i.e. used to remove fading from the channel. Space diversity is also known as Antenna Diversity that uses two or more antennas to improve the quality and reliability of a wireless link. MIMO is the most powerful diversity technique used in wireless communication. In this paper we analyzed with several antennas (MIMO i.e. multiple input multiple output) so as to obtain the space diversity. Also there is Architectural Comparison between Conventional MIMO-OFDM receiver design and orthogonal MIMO OFDM design. This paper is focused on the improvements obtained in the quality of data transmission.

Diversity Schemes for Wireless Communication- a Short Review

Now-a-days the requirements of wireless communication are to have high voice quality, high data rates, multimedia features, lightweight communication devices etc. But the wireless communication channel suffers from much impairment .One of them is fading which is due to the effect of multiple propagation paths, and the rapid movement of mobile communication devices. In a typical wireless communication environment, multiple propagation paths often exist from a transmitter to a receiver due to scattering by different objects. Signal copies following different paths can undergo different attenuation, distortions, delays and phase shifts. So, this is necessary to reduce the problem of fading, but not at the cost of extra power or additional bandwidth. One effective solution is proposed for wireless system named diversity, with out the requirement of power or extra bandwidth. This paper discusses about the characteristics of fading channels and a broad classification of various diversity ...

Effects of Diversity Combining Techniques and Carrier Frequency Offset on Enhancement of BER in Mobile Networks

International Journal of Computer Applications, 2013

Fading is a fundamental problem in wireless communication. However Space time block code scheme is suggested to overcome this problem. In the paper various combination of transmit and receive antenna was considered, a mathematical model was driven and applied using simulation. The relation between signal to noise ratio and bit error rate was plotted. From results it is noted that the receiver diversity better than transmitter diversity, but if both diversity is used that gives better results as shown in Multiple input Multiple Output (MIMO), also signal to noise ratio (SNR) and bit error rate (BER) with carrier frequency offset (CFO) and without carrier frequency offset was compared.

BER Analysis of Receive Diversity Using Multiple Antenna System and MRC

2017

In this work, the performance analysis of a wireless communication is done by modeling a wireless communication system and analysing its bit error rate (BER). The BER of any communication system is helpful for it performance analysis. So, the consequences of multiple antenna system on BER at receiver end is analysed and maximal ratio combining (MRC) is also estimated between signal and noise. Therefore, the BER is attempted to reduce in the wireless communication system which can affect to receive the pure signal in the receiver.

Analytical performance evaluation of a wireless mobile communication system with space diversity

2007

A theoretical analysis is presented to evaluate the bit error rate (BER) performance of a wireless communication system with space diversity to combat the effect of fading. Multiple receiving antennas with single transmitting antenna are considered with slow and fast fading. Performance results are evaluated for a number of receive antennas and the improvement in receiver performance is evaluated at a specific error probability (10-8 and 10-9). It is found that diversity offers a significant improvement in the receiver sensitivity for both the cases of fast and slow fading.

Survey on Diversity Techniques of MIMO Systems

2014

The exploiters of the wireless communication demands for higher data rates, acceptable voice quality with higher network capacity confined due to limited accessibility of radio frequency spectrum, Channel capacity, bandwidth, physical areas and transmission problems caused by different factors like fading and multipath distortion. As in wireless systems it is required to have higher voice quality and high bit rate data services as compared to the present cellular mobile radio standards (up to 2 Mbits/sec). Therefore the key challenge faced by future wireless communication systems is to provide high quality of service (Qos) i.e high data rate wireless access. There are many performance abjection factors in wireless communication channels but FADING problem is the leading worsening problem. In this paper, we studied various transmit diversity techniques in multiple-input multiple-output (MIMO) wireless communication systems. In wireless communication fading of channels is the serious ...