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Performance analysis and enhancement...

University of California, San Diego., Electrical Engineering (Communication Theory and Systems).

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Performance analysis and enhancement of OFDM-based WLAN systems in the presence of nonlinear HPAs and narrowband interference for single and multiple transmit antennas.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Performance analysis and enhancement of OFDM-based WLAN systems in the presence of nonlinear HPAs and narrowband interference for single and multiple transmit antennas./
Author:	Chi, David Wei-Ting.
Description:	223 p.
Notes:	Advisers: Pankaj Das; Rene L. Cruz.
Contained By:	Dissertation Abstracts International69-04B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3307535
ISBN:	9780549564676

Performance analysis and enhancement of OFDM-based WLAN systems in the presence of nonlinear HPAs and narrowband interference for single and multiple transmit antennas.
Chi, David Wei-Ting.

Performance analysis and enhancement of OFDM-based WLAN systems in the presence of nonlinear HPAs and narrowband interference for single and multiple transmit antennas. - 223 p.

Advisers: Pankaj Das; Rene L. Cruz.

Thesis (Ph.D.)--University of California, San Diego, 2008.

1The model was proposed by M. Al-Gharabally in his work, M. Al-Gharabally and P. Das, "On the Performance of OFDM Systems in Time Varying Channels with Channel Estimation Error", IEEE ICC, 2006, pp. 5180--5185

ISBN: 9780549564676Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Performance analysis and enhancement of OFDM-based WLAN systems in the presence of nonlinear HPAs and narrowband interference for single and multiple transmit antennas.
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020 $a 9780549564676
035 $a (UMI)AAI3307535
035 $a AAI3307535
040 $a UMI $c UMI
100 1 $a Chi, David Wei-Ting. $3 1036198
245 1 0 $a Performance analysis and enhancement of OFDM-based WLAN systems in the presence of nonlinear HPAs and narrowband interference for single and multiple transmit antennas.
300 $a 223 p.
500 $a Advisers: Pankaj Das; Rene L. Cruz.
500 $a Source: Dissertation Abstracts International, Volume: 69-04, Section: B, page: 2512.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2008.
520 $a 1The model was proposed by M. Al-Gharabally in his work, M. Al-Gharabally and P. Das, "On the Performance of OFDM Systems in Time Varying Channels with Channel Estimation Error", IEEE ICC, 2006, pp. 5180--5185
520 $a This dissertation addresses the performance issue of Orthogonal Frequency Division Multiplexing (OFDM) based WLANs operating in the presence of nonlinear high power amplifiers (HPAs), narrowband interference (NBI) or jammer and channel estimation error in Rayleigh fading channels for Single Input Single Output (SISO) and Multiple Input Multiple Output (MIMO) antennas configurations. Furthermore, to loosen the design criteria of practical HPAs, a novel PAPR reduction algorithm and receiver structure are proposed in the dissertation to improve the system performance.
520 $a In the first part of the thesis, we analyze the performance of a M-ary Quadrature Amplitude Modulation (M-QAM) SISO-OFDM system that is impaired by nonlinear HPAs, jammer and channel estimation error. We also present a more practical jammer model in this part of analysis. Next, we will consider a M-QAM SISO-OFDM system that is subject to nonlinear HPAs and channel estimation error in fading channels. In this case, we utilize the channel estimation error model1 proposed by Mishal et al. [31] to significantly reduce the complexity of the bit error rate (BER) expression. For the third part of thesis, we extend the work presented in part one to include the scenario where the system has multiple transmit antennas while it is still impaired by nonlinear HPAs, NBI and channel estimation error. Finally, we propose a new algorithm to minimize the nonlinear distortion introduced by nonlinear HPAs and a new receiver structure that offers superior performance in fading channels. The performance of a SISO-OFDM system which is impaired by nonlinear HPAs, NBI and channel estimation error is significantly improved when the proposed scheme is deployed. In addition to the improvement in the system performance, our proposed scheme also loosens the design criteria of practical HPAs and enables the practical HPAs to operate more efficiently in mobile situations. For the purpose of simulation, we extend the analytical models that are under study to an IEEE 802.11n WALN system and present both theoretical and simulation results.
590 $a School code: 0033.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Engineering, System Science. $3 1018128
690 $a 0544
690 $a 0790
710 2 $a University of California, San Diego. $b Electrical Engineering (Communication Theory and Systems). $3 1018760
773 0 $t Dissertation Abstracts International $g 69-04B.
790 $a 0033
790 1 0 $a Cheng, Chung-Kuan $e committee member
790 1 0 $a Cruz, Rene L. $e committee member
790 1 0 $a Cruz, Rene L., $e advisor
790 1 0 $a Das, Pankaj, $e advisor
790 1 0 $a Milstein, Laurence B. $e committee member
790 1 0 $a Rosing, Tajana S. $e committee member
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3307535