This chapter demonstrates various ways for transmitting an image file using MIMO-OFDM systems which have anti-error ability to reduce BER. Furthermore, various diversity combining techniques like maximal ratio combining (MRC), selection combining (SC) are incorporated along with transmitting diversity scheme (i.e., beamforming). Different modulation techniques (viz. QPSK, 16-PSK, and 64-PSK) are used and evaluated in terms of BER vs. SNR considering different combination of transmitters and receivers. Lastly, results showed that in the transmission course, BER is considerably reduced and the image quality is found much better in comparison to other schemes.
Top1.1 Introduction
With much enhancement in almost all fields of wireless communication and adding advantages to its upcoming generations has provided and immense hope for bright future of it. Along with this, present scenario demands much more than it is producing without any loss in data and no limitations. Constraints including data rate, range, low throughput and less bandwidth utilization, etc. Various attempts have been made to overcome these attempts by using multiple input multiple output (MIMO) systems for its increased reliability, diversity and low Bit Error Rate (BER) in the wireless world. In this chapter, various ways have been provided in transmitting an image file using MIMO-OFDM systems which have anti-error ability to degrade BER. Furthermore, various Diversity Combining Techniques like maximal ratio combining (MRC), selection combining (SC) are incorporated along with transmitting diversity scheme i.e. Beamforming. Different modulation techniques viz. QPSK, 16-PSK and 64-PSK are used and evaluated in terms of BER vs. SNR using various transmitters and receivers. Lastly, results showed that in the transmission course, the image quality is much better in QPSK along with low BER than others.
With much enhancement in almost all fields of wireless communication and adding advantages to its upcoming generations has provided and immense hope for bright future of it. Along with this, present scenario demands much more than it is producing without any loss in data and no limitations. Constraints including data rate, range, low throughput and less bandwidth utilization, etc. Various attempts have been made to overcome these attempts by using multiple input multiple output (MIMO) systems for its increased reliability, diversity and low Bit Error Rate (BER) in the wireless world. In this chapter, various ways have been provided in transmitting an image file using MIMO-OFDM systems which have anti-error ability to degrade BER. Furthermore, various Diversity Combining Techniques like maximal ratio combining (MRC), selection combining (SC) are incorporated along with transmitting diversity scheme i.e. Beam forming. Different modulation techniques viz. QPSK, 16-PSK and 64-PSK are used and evaluated in terms of BER vs. SNR using various transmitters and receivers. Lastly, results showed that in the transmission course, the image quality is much better in QPSK along with low BER than others.
Image transmission in the arena of wireless communication is considered as a big challenge. Today, a large amount of focus is on the quality transmission of visual images perfectly than the increased data rate and reliability through wireless means. Image transmission often gets depraved due difficulties like co-channel interference, distortions in signals, limitations in bandwidth and channels that vary according to time causes much more decrement in image transmission performance. So, various improvement factors are added, and perfect visual images can be seen through M-PSK scheme proposed below. MIMO-OFDM overcomes the challenges that are being faced by all future wireless communications by providing full data and quality of service. It protects the users from being interfered by other users and having high spectral efficiency and reliability through various multiplexing and antenna diversity gains (Banelli & Cacopardi, 2000). A coherent combination is used to realize diversity gain and array gain, and interference cancellation is performed by use of multiple antennas i.e. MIMO. Use of Transmit diversity scheme i.e. Beam forming along with various other diversity combining techniques added in MIMO are used in this chapter are MRC & SC.