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    • 17. 发明专利
    • Radio communication unit and method for calculating frequency shift
    • 无线电通信单元和计算频率转换的方法
    • JP2009283992A
    • 2009-12-03
    • JP2008130789
    • 2008-05-19
    • Nec Corp日本電気株式会社
    • TOMOKIYO AKIRAIWASAKI MOTOYA
    • H04L27/227H04B1/16H04L27/38
    • H04L27/0014H04L2027/0026
    • PROBLEM TO BE SOLVED: To provide a radio communication unit which estimates a frequency shift over a wide range. SOLUTION: A demodulation section 112 receives a signal including a predetermined reference signal and demodulates the received signal into a baseband signal. A reference-signal extraction section 108 extracts a phase of the reference signal from the baseband signal. A Reference Signal phase shift calculation section 109 obtains a phase shift amount of the extracted reference signal with respect to time, and obtains a frequency shift based upon the obtained phase shift amount. A frequency shift estimation-range decision section 110 determines a frequency shift estimation range used in the Reference Signal phase shift calculation section 109 based on the frequency shift obtained by the Reference Signal phase shift calculation section 109. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种在宽范围内估计频率偏移的无线电通信单元。 解决方案:解调部分112接收包括预定参考信号的信号,并将接收到的信号解调为基带信号。 参考信号提取部分108从基带信号中提取参考信号的相位。 参考信号相移计算部件109获得所提取的参考信号相对于时间的相移量,并且基于获得的相移量获得频移。 频移估计范围决定部110基于由参考信号相移计算部109获得的频移来确定参考信号相移计算部109中使用的频移估计范围。(C)2010 ,JPO&INPIT