Peak-to-average power ratio reduction of SFBC MIMO-OFDM signals using unused tones
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|Title:||Peak-to-average power ratio reduction of SFBC MIMO-OFDM signals using unused tones||Authors:||Braz, Isabela; Guan, Lei; Zhu, Anding; Brazil, Thomas J.||Permanent link:||http://hdl.handle.net/10197/12077||Date:||23-Feb-2010||Online since:||2021-03-31T11:22:49Z||Abstract:||Multiple input multiple output techniques combined with orthogonal frequency division multiplexing (MIMO-OFDM) provide a promising approach for wireless systems. However, a serious drawback of the OFDM system is the high peak-toaverage power ratio (PAPR), which may severely affect the power efficiency of RF power amplifiers. In this paper, we propose a simple method to reduce the PAPR of MIMO-OFDM signals based on the use of unused subcarriers. Instead of processing the signals at each transmitter separately, a peak cancelling signal is generated at one antenna and is then applied to all the others with only simple modifications. Simulation has shown that a minimum 2 dB reduction in PAPR can be achieved for all transmit signals using this approach. As the signal processing is nearly all done at a single transmitter, repetition of the operations at each transmitter is avoided, and therefore the overall cost of the system can be significantly reduced.||Type of material:||Conference Publication||Publisher:||IEEE||Copyright (published version):||2010 IEEE||Keywords:||Clipping; Multiple Input Multiple Output (MIMO); Orthogonal Frequency Division Multiplexing (OFDM); Peak to Average Power Ratio (PAPR); Space Frequency Block Coding (SFBC)||DOI:||10.1109/IMWS.2010.5441004||Other versions:||http://imws2010.av.it.pt/||Language:||en||Status of Item:||Peer reviewed||Is part of:||2010 IEEE International Microwave Workshop Series on "RF Front-ends for Software Defined and Cognitive Radio Solutions", IMWS 2010 - Proceedings||Conference Details:||The 2010 IEEE International Microwave Workshop Series on RF Front-ends for Software Defined and Cognitive Radio Solutions (IMWS), Aveiro, Portugal, 22-23 February 2010||ISBN:||9781424457533||This item is made available under a Creative Commons License:||https://creativecommons.org/licenses/by-nc-nd/3.0/ie/|
|Appears in Collections:||Electrical and Electronic Engineering Research Collection|
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