Implementation of pulse shaping techniques in MC CDMA system to reduce the PAPR

2014 First International Conference on Computational Systems and Communications (ICCSC) Pub Date : 2014-12-01 DOI:10.1109/COMPSC.2014.7032645

Preethimol Silastin, Sanoj Viswasom

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Abstract

For the last few years Multi Carrier Code Division multiple Access (MC CDMA) has gained more attention towards the high data rate transmission through the multipath channels. Researchers are trying to improve the performance of MC CDMA system by mitigating its demerits. As it is a combination of CDMA and OFDM, it consist of a large number of independent subcarriers. The amplitude of such a signal can have high peak values. One of the main fundamental drawbacks of MC CDMA systems is its high peak-to-average-power ratio (PAPR). This paper presents a PAPR Reduction method for MC CDMA system with various Pulse Shaping Functions. The pulse shapes like Raised cosine pulse (RC) and Improved sine power pulse (ISP) are used for pulse shaping the MC CDMA system. The results like bit error rate (BER) performance and PAPR of the MC CDMA system with and without pulse shaping indicates that the MC CDMA system with pulse shaping is better than the normal MC CDMA system and the pulse shaping with ISP is better compared to raised cosine pulse. Simulations are done using MATLAB version R2010a.

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在mccdma系统中实现脉冲整形技术以降低PAPR

近年来，多载波码分多址(mccdma)技术越来越受到人们的关注，主要是通过多径信道实现高速率的数据传输。研究人员正试图通过减轻MC CDMA系统的缺点来提高系统的性能。由于它是CDMA和OFDM的结合，它由大量独立的子载波组成。这种信号的振幅可以有很高的峰值。mccdma系统的主要缺陷之一是其高峰值平均功率比(PAPR)。针对具有多种脉冲整形功能的mccdma系统，提出了一种降低PAPR的方法。在MC - CDMA系统中，采用了提高余弦脉冲(RC)和改进正弦功率脉冲(ISP)两种脉冲形状进行脉冲整形。采用脉冲整形和不采用脉冲整形的MC - CDMA系统的误码率(BER)性能和PAPR性能表明，采用脉冲整形的MC - CDMA系统优于普通的MC - CDMA系统，采用ISP的脉冲整形的MC - CDMA系统优于升余弦脉冲。采用MATLAB R2010a进行仿真。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 First International Conference on Computational Systems and Communications (ICCSC)

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