The broadband wireless communication not only can carry out broadband and theinformation communications anywhere by all means at any time, but also can providehigh mass, high reliability and high baud rate movement communication service in thefuture. Along with consumers’ movement communication of the request continuouslyraise, the advantage of broad bond wireless system (Broadband Wireless Access,
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IEEE802.11a is one of the standards in IEEE originally determined wireless LAN,which is mainly used to connect the office LAN and campus network users to the userterminal through wireless access, providing potential ways for telecommunication mobility,personality, and multimedia applications. And it becomes one of the effective broadbandwireless accesses. IEEE802.11a physical layer convergence protocol applies OrthogonalFrequency
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The broadband wireless communication not only can carry out broadband and theinformation communications anywhere by all means at any time, but also can providehigh mass, high reliability and high baud rate movement communication service in thefuture. Along with consumers’ movement communication of the request continuouslyraise, the advantage of broad bond wireless system (Broadband Wireless Access,
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The future broadband wireless communication systems are expected to provide ubiquitous, high-reliability and high-data-rate mobile multimedia transmission. Broadband and mobility is the development direction of future communications. And how to provide high speed communication in complex wireless environment becomes a hot research topic in recent years. In this paper, MIMO and OFDM, which are consider
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Orthogonal Frequency Division Multiplexing(OFDM)has become the key technique in broadband wireless access and the next generation mobile communication system. Extensive attentions have been paid to OFDM due to its high spectral efficiency,high data rate and well anti-multipath ability.However, there are well-known shortcomings of OFDM technology: the timing offset and frequency offset is very sensitive. Timing
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As a key technology of the fourth-generation mobile communication, the OFDM technology received a widespread attention and study. Modulation signal recognition is an important branch in researches of the modern mobile communication. It requires us to detect the useful signal and estimate various modulation parameters in the complex wireless environment to provide the conditions for
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To meet the demands of the mobile communications market, and compete with emerging technologies, such as WiMAX and Wi-Fi, at the end of 2004 the 3rd Generation Partnership Project(3GPP) has proposed the 3G long term evolution(3G LTE), which is evoluted from the 3rd Generation system. The LTE technology will provide higher data rates, lower latency
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Orthogonal Frequency Division Multiplexing(OFDM)has been extensively used in the wireless communication systems. It is paid more and more attention to, because of its performance for resisting multipath interference and high efficiency of system bandwidth. Thus a MIMO wireless communication system is produced. MIMO-OFDM system which combines the two technologies to get higher data transfer rates
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Having a set of characteristics such as robustness against frequency-selective fading channels, high bandwidth efficiency, and expandability, OFDM ( Orthogonal Frequency Division Multiplexing)has been proposed to be a potential candidate for the next generation mobile communication systems. However, a major drawback of OFDM signals is their high Peak-to-Average Power Ratio (PAPR). So, how to effectively
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Order to Compete with new wireless broadband technology such as WiMAX, Wi-Fi.3GPP(International Standardization Organization) launched LTE technology standardizationin end of 2004, it is researching of the UMTS long-term evolution . The LTE technologyconsolidate the traditional cellular mobile technology. In addition, through adopt OFDM,MIMO technology, LTE will also improve the IPR Structure in the current telecommunicationindustry.
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