Qijun Song

Beijing University of Posts and Telecommunications, Peping, Beijing, China

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Publications (3)0 Total impact

  • Zheng Zhou, Bin Li, Qijun Song
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    ABSTRACT: From the historical development of wireless communication technologies and radio spectrum resources regulation, the relationship between open spectrum movement and some new wireless communication technologies, such as UWB in China is discussed in the paper. Some UWB research works from our laboratory is also summarized. It can be concluded that the age of radio revolution, unlicensed and singular class wireless is coming.
    Ultra-Wideband (ICUWB), 2010 IEEE International Conference on; 10/2010
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    ABSTRACT: The potential interference of ultra wideband (UWB) on existing narrowband wireless communication systems must be analyzed before it is applied, so the paper uses a method based on the physical layer model to analyze the compatibility of direct-sequence ultra wideband (DS-UWB) and multi-band ultra wideband (MB-UWB) on several narrowband victim systems. Based on the physical layer models of PAM-DS-UWB and PPM-DS-UWB and MB-UWB and these victim systems, depended on the communication condition of victim systems, the power restrictions of UWB are obtained on the operating frequency band of N-CDMA, GSM, WLAN systems. The results can offer a solution for the compatibility between UWB and these victim systems.
    Communications and Information Technologies, 2008. ISCIT 2008. International Symposium on; 11/2008
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    ABSTRACT: Aiming at the effect of ultra wideband (UWB) system for the potential victim systems on UWB operating frequency band, using the entire physical layer model method, this paper studies the interference of direct-sequence ultra wideband (DS-UWB) and multi-band ultra wideband (MB-UWB) on these victim systems. Depended on the physical characteristics of UWB and these victim systems, the entire physical layer models are set up. Based on the requirement of bit error rate (BER) and sensitivity of receiver of these victim systems, the emission limits of UWB are obtained on the operating frequency band of these victim systems, The conclusion not only can provide the reference to constitute the frequency spectrum strategy of UWB, but also can offer a solution to the coexistence between UWB and these victim systems.
    Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on; 11/2008