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802.16 physical layer based OFDM system simulation and key technology research

Author: YangLiBen
Tutor: ChenJiaFu
School: Kunming University of Science and Technology
Course: Communication and Information System
Keywords: 802.16a OFDM Multipath channel Channel estimation Carrier frequency synchronization Estimated variance
CLC: TN919.3
Type: Master's thesis
Year: 2009
Downloads: 41
Quote: 0
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Abstract


Wireless Metropolitan Area Network (WMAN) technology refers to a wireless communication network coverage than a wireless local area network communication technology . Wireless metropolitan area network was launched to meet the growing demand for broadband wireless access (BWA) market demand . WLAN in order to compensate for the lack of outdoor applications . IEEE decided to develop a new, more complex global standard that should be able to simultaneously solve the physical layer environment ( outdoor RF transmission ) and Qos two aspects. The Organization for Standardization is the IEEE 802.16. Orthogonal frequency division multiplexing (OFDM: Orthogonal Frequency Division Multiplexing) technology is today's high-speed wireless communication field research focus , because of its good resistance to multipath interference and spectrum utilization is generally high considered to be the fourth generation mobile communication system, the core technology is IEEE 802.16 physical layer modulation technology , this article means of achieving its technical principles and have done a detailed analysis. Next, the synchronization problem OFDM technology studied in detail , analyzing a variety of synchronization error impact on system performance , and then examine the OFDM system synchronization technology, simulation studies were based on cyclic prefix carrier frequency synchronization algorithm, based training symbols in frequency domain frequency synchronization algorithm, based on training symbol time domain correlation frequency synchronization algorithm, and a variety of timing synchronization technologies. In order to study the IEEE802.16a protocol WirelessMAN-OFDM synchronization scheme , the mobile radio channel for this in-depth study , first analyzes the various wireless channel fading , and then studied a variety of statistical models the radio channel , and finally to the wireless channel is carried out computer simulations for this research work behind to do the groundwork . This paper proposes three IEEE802.16a physical layer specifications are analyzed , focusing on the WirelessMAN-OFDM protocol , frame structure and synchronization mechanisms for its research and analysis of its synchronization scheme conducted in-depth research , the last paper on IEEE802. 16a physical layer synchronization scheme based on the study , combined with the characteristics of their radio channel synchronization scheme is improved , a new carrier frequency synchronization algorithm and under different channel types conducted a number of improved algorithm simulation , and finally get the optimal solution. Improve the estimation accuracy .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Data communication > Data transmission technology
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