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February 2013

Volume: 12, Issue: 2, February' 2013

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Performance Comparison of MIMO Systems over AWGN and Rayleigh Channels using OSTBC3 with Zero Forcing Receivers

Authors: Navjot Kaur and Lavish Kansal

Abstract:



Multiple-input multiple-output (MIMO) are being employed in wireless communications to achieve high data rates within the limited radio frequency spectrum by using multiple antennas at transmitter and receiver. The performance analysis of MIMO system over AWGN and Rayleigh fading channels using OSTBC3 as space time block coding with Zero Forcing (ZF) receiver is presented. The performance can be improved by
employing multiple antennas at transmitter and receiver sides. Thus MIMO systems take advantage of spatial diversity. In this paper, the results present the effects of the antenna selection on the Bit Error Rate (BER) analysis for M-PSK modulation using OSTBC3 over AWGN and Rayleigh channels.

(pp. 686-692)                    Download PDF     DOAJ

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Audio Watermarking Using LSB with Adjustment Method

Authors: Ansith.S, Dr. K.S.Prasadh

Abstract:

In this paper we are discussing watermarking on audio signals. In this method the recorded audio data is first sampled using a sampling frequency of 22050 Hz. Then the watermark
message is watermarked into the sampled data of the audio signal. In this method the adjustment is done to increase the accuracy of the watermarked signal.
Finally we extract the message from the audio data.

 

(pp. 693-696)                    Download PDF


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