PAR Reduction in Space-Time Coded OFDM via Modified Active Constellation Extension


Pradeep Kumara T. G., Amila and Moh Lim, Sim (2008) PAR Reduction in Space-Time Coded OFDM via Modified Active Constellation Extension. In: 2nd IEEE Conference on Innovative Technologies in Intelligent Systems and Industrial Applications, 12-13 JUL 2008, Cyberjaya, MALAYSIA.

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High peak-to-average ratio (PAR) is one of the main problems in Orthogonal Frequency Division Multiplexing (OFDM) systems. This problem becomes more complicated when Space-time codes (STC) are employed as any PAR reduction method should not destroy the relationships among STC encoded OFDM symbols. There are existing PAR reduction methods for STC-OFDM systems. However, these methods do not provide sufficient performance of PAR reduction without complex receivers. In this paper, we propose Modified Active Constellation Extension (Modified ACE) method for STC encoded OFDM systems to provide 3.5dB of PAR improvement at a 10(-3) complementary cumulative density function (CCDF) of PAR. Most importantly, Modified ACE does not require any complex receivers or side information.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > T Technology (General)
Q Science > QA Mathematics > QA71-90 Instruments and machines > QA75.5-76.95 Electronic computers. Computer science
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 26 Sep 2011 00:58
Last Modified: 26 Sep 2011 00:58


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