Informatics Publishing Limited

Ashu ¹, Sandeep Singh ¹, Devender ¹

Affiliations
1 Department of Applied Psychology, Guru Jambheshwar University of Science & Technology, Hisar, Haryana, IN

Abstract

The competitive pace of modern life places many demands on attention. This hectic life may cause stress and unhappiness. The present investigation was designed to study the relationship and gender differences between hope, mindfulness and happiness. Sample comprises of 180 students (100 males and 80 females) with age range of 18-24 years. For data collection purpose The Trait Hope Scale by Snyder et al. (1991) Mindfulness Attention Awareness Scale (MAAS) by Brown and Ryan (2003) and The Oxford Happiness Questionnaire by Argyle and Hills (2002) are used. Results revealed a positive relationship between hope, mindfulness and happiness.

Keywords

Hope, Happiness, Mindfulness, Gender Differences.

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Sunita Devi ¹, Munna Devi ², Devender ²

Affiliations
1 Department of ECE, MITM, Jevra, Hissar, Haryana, IN
2 Department of ECE MITM, Jevra, Hissar, Haryana, IN

Abstract

Tremendous improvement has been made possible in wireless technology due to success of OFDM system which is a multi carrier modulation technique with capability to support high data rates. Despite its many advantages OFDM has failed against inter symbol interference (ISI), high sensitivity to Inter carrier interference (ICI), high peak to average power ratio (PAPR), phase noise and band limited channel . Hence the performance of an OFDM system is highly affected by the aforementioned undesired phenomenon. For this reason bandlimited system often employs pulse shaping techniques. In this paper pulse shaping of multi c arrier signal is introduced by using various pulse shapes like Rectangular pulse (REC), Raised cosine pulse (RC), Better than raised cosine pulse (BTRC), Sinc power pulse (SP) and Improved sinc power pulse (ISP). The impulse responses and frequency spectrums have been evaluated and compared with system without using pulse shaping. Results obtained by simulation for OFDM system using pulse shaping and without using pulse shaping indicate that the performance of OFDM system with various pulse shapes is better than without using pulse shaping. Along with it can also be observed that among pulse shaping ISP exhibits better performance. Computer simulation has been done by using MATLAB 7.0 software.

Keywords

OFDM, ISI, ICI, Rectangular Pulse (RFC), Raised Cosine Pulse (RC), Better than Raised Cosine Pulse (BTRC), Sine Power Pulse (SP) And Improved Sine Power Pulse (ISP).

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