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Title: Enhancement of Power Efficiency in OFDM System by SLM with Predistortion Technique, Journal of Telecommunications and Information Technology, 2011, nr 4

Creator:

Sharma, T. N. ; Sharma, Pankaj Kumar ; Nagaria, R. K.

Date:

2011, nr 4

Resource Type:

artykuł

Description:

Orthogonal Frequency Division Multiplexing (OFDM) is considered as a strong candidate for future wireless communication because it is marked by its higher frequency multiplicity and greater immunity to multipath fading. However, the main drawback of OFDM is its high amplitude fluctuations measured by peak-to-average power ratio (PAPR), which leads to power inefficiency and requires expensive high power amplifier (HPA) with very good linearity. In this paper, we propose selected mapping (SLM) with predistortion technique to decrease the nonlinear distortion and to improve the power efficiency of the nonlinear HPA. In the proposed method SLM reduces the PAPR and improves the power efficiency, the predistorter improves the bit error rate (BER) performance of the system. The PAPR reduction is possible with SLM when compared with original OFDM. After reducing the PAPR with SLM the data goes into the HPA with and without predistorter. The BER performance curves of SLM method with or without predistorter shows that, predistorter operates more effectively in SLM method than original OFDM system. At 4 dB IBO (input backoff) the conventional method with predistorter achieves 1.8 dB SNR gain than conventional method without a predistorter and at 6 dB IBO the BER performance is towards the ideal linear amplifier. The proposed system will be evaluated for OFDM system in the presence of a nonlinear power amplifier.

Publisher:

Instytut Łączności - Państwowy Instytut Badawczy, Warszawa

Format:

application/pdf

Resource Identifier:

oai:bc.itl.waw.pl:1204 ; ISSN 1509-4553, on-line: ISSN 1899-8852

DOI:

10.26636/jtit.2011.4.1183

ISSN:

1509-4553

eISSN:

1899-8852

Source:

Journal of Telecommunications and Information Technology

Language:

ang

Rights Management:

Biblioteka Naukowa Instytutu Łączności

Subject and keywords:

PAPR OFDM SLM nonlinear HPA

Object collections:

Last modified:

Aug 29, 2024

In our library since:

May 28, 2013

Number of object content hits:

312

All available object's versions:

https://bc.itl.waw.pl/publication/1509

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Edition name Date
Sharma, Pankaj Kumar; Nagaria, R. K.; Sharma, T. N., Enhancement of Power Efficiency in OFDM System by SLM with Predistortion Technique, Journal of Telecommunications and Information Technology, 2011, nr 4 Aug 29, 2024

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