Abstract: With the recent exploding research interest in wireless communications, the application of signal processing to this area is becoming increasingly important. Indeed, it is the advances in signal processing technology that make most of today’s wireless communications possible and hold the key to future services. The present paper deals with simulation model of square root raised cosine...

Spectrum sensing is the basic component in cognitive radio. This paper value decomposition (SVD) and particle swarm optimization (PSO) optim detect the presence of primary wireless signal. We simulated the algorithm using common digital signal communication namely rectangular pulse, raised cosine and root This algorithm is suitable for blind spectrum sensing where the properties of the signal t...

This paper presents the modeling and simulation of an optical fiber Bragg grating for maximum reflectivity, minimum side lobe. Gating length represents as one of the critical parameters in contributing to a high performance fiber Bragg grating. The reflection spectra and side lobes strength were analyzed with different lengths .The side lobes have been suppressed using raised cosine apodization...

This paper aims to The mobile WiMAX air interface adopts orthogonal frequency division multiple access (OFDMA) as multiple access technique for its uplink (UL) and downlink (DL) to improve the multipath performance. All OFDMA based networks, including mobile WiMAX experiences the problem of high peakto-average power ratio (PAPR). This thesis presents: Discrete-Cosine transform matrix (DCTM) pre...

In this paper, a reduced complexity structure for the Multipath Interference Canceller (MPIC) [1], is proposed. The structure is well suited for user equipments supporting High Speed Downlink Packet Access (HSDPA) standard. The reduced complexity structure is obtained by replacing the rootraised cosine for pulse shaping by a full raised cosine in the interference regeneration blocks. Indeed, th...

The ability of observers to extract depth from opposite luminance-contrast-polarity stimuli was investigated. The stimuli consisted of two dichoptic-pairs of Gaussians, with one of the Gaussians in each pair having a positive contrast-polarity and the other a negative contrast-polarity. Stimulus durations ranging from 0.2 to 4 s were used. This range of durations was employed to reveal stereo m...

The default pulse shaping filter in the conventional multiple-input and multiple-output (MIMO) based orthogonal frequency division multiplexing (OFDM) system is a rectangular function, which unfortunately is highly sensitive to frequency synchronization errors and the Doppler spread. Shaped OFDM is able to considerably alleviate the effect of inter-carrier interference (ICI) as well as reduce t...