Prabal Gupta ¹, Balpreet Singh ¹, Gursharanjeet Singh ¹

Affiliations
1 School of ECE, Lovely Professional University, Phagwara - 144411, Punjab, IN

Abstract

Partial transmitted sequence (PTS) is the most important technique for the minimization of problem peak to average power ratio (PAPR) found in multicarrier system i.e., Orthogonal Frequency Division Multiplexing (OFDM). But PTS scheme undergo a very difficult and complex process of designing random phase sequences which are used for optimization of subblocks of data stream in time domain after applying Inverse Fast Fourier Transform (IFFT) so that the problem PAPR can be minimized. Hence in this paper we are proposing a technique in which we have used hadamard matrix for the optimization of sub-blocks of data stream in time domain after IFFT along with discrete cosine transform. So this proposed technique drastically reduced the complexity of designing phase sequence and help in recovering the same information back at the receiver side with the help of index of individual rows of hadamard matrix. Simulation results are presented under multiple sub carriers (N)=64,128 and 256, classic frequency domain partition partial transmitted sequence(CFDP-PTS)=3 and 4 shows a significant gain (dB)of around 3.8 and 1.4 in comparison of conventional OFDM system and traditional PTS technique respectively under N=128 and CFDP=4.

Keywords

Classic Frequency Domain Partition Partial Transmitted Sequence (CFDP-PTS), Complementary Cummulative Distributive Function (CCDF), Peak to Average Power Ratio (PAPR)

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Sonia ¹, Gurpreet Singh Saini ¹, Chirag Sharma ², Gursharanjeet Singh ¹

Affiliations
1 Department of Electronics and Communication Engineering, Lovely Professional University, Phagwara, Punjab -144411, IN
2 Department of Computer Science and Engineering, Lovely Professional University, Phagwara, Punjab-144411, IN

Abstract

In next generation wireless system such as Long Term Evolution (LTE) and Worldwide Interoperability Microwave Access (WIMAX) the major issue is to maintain the quality of service of a network. User required always best connected services anytime and anywhere. Due to increase in number of user on particular network, load is increased on a network. Due to high load handover is required but in many situations unnecessary handoff and handoff failure is initiated, which lags the performance of a network. To overcome this problem we have used RSS vertical handover decision method with some additional parameters to improve the performance in 4G heterogeneous networks.

Keywords

LTE, RSS, Vertical Handoff Decision Algorithms, WIMAX.

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Chirag Sharma ¹, Gursharanjeet Singh ², Gurpreet Singh Saini ²

Affiliations
1 Department of Computer Science and Engineering, Lovely Professional University, Phagwara - 144411, Punjab, IN
2 Department of Electronics and Communication, Lovely Professional University, Phagwara - 144411, Punjab, IN

Abstract

The presented work presents an efficient watermarking technique based on Discrete Wavelet Transformation (DWT), Singular Value Decomposition (SVD) and Rail Fence methods that are applied on digital multimedia such as videos, images. The occurrences to abuse and copyright infringement of videos by some intrudes is increasing day by day. Video watermarking is technique to resolve the given problem .The proposed technique will embed a watermark in the frames of the video. The proposed scheme is applied to the frame on high frequency sub bands. Various attacks have been applied to watermarked video and input video to check robustness of the proposed scheme.

Keywords

Discrete Wavelet Transform (DWT), Peak Signal to Noise Ratio (PSNR), Rail-Fence, 10’s Complement, Singular Value Decomposition (SVD).

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