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Research on Peak-to-Average Power Ratio and Baseband Implementation Based on FPGA of MC-CDMA System

Author: WangGang
Tutor: LiuLuoZuo
School: PLA Information Engineering University
Course: Military Communication
Keywords: Multi-carrier code division multiple access PAPR Coding Baseband precompensation
CLC: TN929.533
Type: Master's thesis
Year: 2009
Downloads: 27
Quote: 0
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Abstract


MC-CDMA technology is a combination of OFDM and CDMA technology program , it inherits the excellent characteristics of OFDM and CDMA technology , high-speed data transmission , thus becoming one of the focus of the communication can be implemented in a multipath fading channel . This article focuses on the PAPR of MC-CDMA systems research from two aspects to reduce the signal peak-to-average ratio and improve the power amplifier linearization gives a solution . Thesis include: first , the peak-to-average ratio of MC-CDMA systems are analyzed theoretically . The paper first describes the MC - CDMA , the basic principles of the PAPR of MC-CDMA systems are analyzed theoretically , given the PAPR characteristics of MC-CDMA systems . Second, coding - based PAPR suppression technology . PAPR characteristics according to the MC-CDMA systems in order to reduce the peak-to-average ratio of MC-CDMA systems , the paper gives a method of combining based encoding and spreading code performance simulation method can be used to suppress PAPR of the signal ; further drawback of this method has a lower coding efficiency also proposed a method of combining an improved encoding and spreading code , the method under conditions taking into account the encoding efficiency can be obtained more satisfactory the inhibitory effect. Third, the baseband pre-compensation - based power amplifier linearization techniques were studied. The papers focus on the look-up table method baseband pre - compensation technique , in order to reduce the complexity created by the look-up table method , this paper presents a blind estimation -mapping method to create a query table , the method is simple , and can get better pre-compensation effect . Finally, the combination of coding and spreading code method and blind estimates reflect a sputtering method would result from the effect of performance simulation . Fourth , on the basis of previous research , the completion of the MC-CDMA systems baseband sender FPGA design . The paper introduces the hardware structure and main technical indicators , and then the sender module descriptions of function and design and implementation , and finally gives the results of on-board debugging .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications > Cellular mobile communications systems (mobile phones, mobile phone handsets ) > Code Division Multiple Access (CDMA) mobile communication
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