Archive:: International Journal of Wireless Communications and Mobile Computing:: Science Publishing Group

Volume 4, Issue 5, September 2016

SI Free PTS Technique for PAPR Reduction in OFDM Systems Using Concentric Circle Constellation Mapping

Md. Moshiur Rahman, Muhammad Ahad Rahman Miah, Farhana Akter Mou

Issue: Volume 4, Issue 5, September 2016

Pages: 68-75

Received: 19 October 2016

Accepted: 31 October 2016

Published: 18 November 2016

DOI: 10.11648/j.wcmc.20160405.11

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Abstract: The Orthogonal Frequency Division Multiplexing is one of the widely used modulation techniques in the broadband wireless technology. One of the main problems is the high peak-to-average power ratio of transmitted signal due to the superposition of many subcarriers. Partial transmit sequences (PTS) is a popular technique to reduce the peak-to-averag... Show More

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Orthogonal Space Time Block Code for Four Time Slots for Uplink Transmission

Hala M. Abd Elkader, Gamal M. Abdel-Hamid, Adly S. Tag El-Dien, Asmaa A. Nassif

Issue: Volume 4, Issue 5, September 2016

Pages: 76-80

Received: 7 November 2016

Accepted: 26 November 2016

Published: 23 December 2016

DOI: 10.11648/j.wcmc.20160405.12

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Abstract: In this paper, a new proposed space-time code for four-time slots and two transmitters for uplink transmission in a mobile system is presented. The mobile system needs three or four-time slots for data transmission. Also, this code is applied for multi-input multi-output (MIMO) fading channel. The proposed orthogonal space-time code achieves the pr... Show More

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