In this paper, we have measured channel capacity for various communication system such as SISO, SIMO, MIMO with different modulation technique like BPSK, QPSK, 16-QAM and 64-QAM. In the proposed algorithm the Bit Error Rate (BER) is less compared to conventional algorithm. The proposed algorithm is suitable for fast speed traffic that is when the speed of the mobile is very high. We have measur...

In this paper, we made a comprehensive study to evaluate the performance of a multi antenna supported multi carrier Code Division Multiple Access (MC-CDMA) system on color image transmission. The 2-by-2 spatially multiplexed 1⁄2-rated Convolutinally encoded MCCDMA system under investigation implements three linear signal detection techniques (Equalizers) such as Minimum Mean Square Error (MMSE)...

Multiple-Input Multiple-Output (MIMO) systems as a means to combat fading in wireless channels. MIMO allows higher throughput, diversity gain and interference reduction. In this paper, we analyze the Bit Error Rate (BER) performance of the Alamouti Space Time Block Code with V-BLAST (Vertical Bell Laboratories Layered Space-Time) over MIMO system. Basic idea in this scheme is to improve the BER...

In this paper, the gamma–gamma probability distribution is used to model turbulent channels. The bit error rate (BER) performance of free space optical (FSO) communication systems employing on-off keying (OOK) or subcarrier binary phase-shift keying (BPSK) modulation format is derived. A tip-tilt adaptive optics system is also incorporated with a FSO system using the above modulation formats. T...

Free space optical (FSO) communication link is a line of sight (LOS) wireless link between the nodes separated by an unguided medium such that visible and infrared bands of the spectrum are used as data carrier. Recent past has witnessed huge revival of research interest in this field so as to make FSO commercially viable and looking into this prospective, data modulation techniques are one of ...

This paper incorporates a comprehensive BER simulation study undertaken on the effectiveness of a Quasi Orthogonal Space time block code (QO-STBC) encoded DWT Based MIMO CDMA wireless communication system. The Code Division Multiple Access (CDMA) is a promising technique for high bit rate transmission in wireless communications systems. The QO-STBC encoded DWT Based MIMO CDMA system under prese...