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    • 3. 发明专利
    • Wireless tag distance measuring device
    • JP5373339B2
    • 2013-12-18
    • JP2008215147
    • 2008-08-25
    • 日本無線株式会社
    • 康史 鹿島重幸 浅見国充 新井政行 高橋
    • G01S13/76G01S13/79
    • PROBLEM TO BE SOLVED: To avoid interference of response signals transmitted from a plurality of radio frequency tags and to improve distance measuring precision in a radio frequency tag distance measuring system. SOLUTION: A radio frequency tag distance measuring device 10 generates PN signals changing values in response to inherent assignment PN codes of the radio frequency tag of a distance measuring object, and further generates sine wave PN signals multiplying reference sine wave signals to the PN signals, and transmits a diffusion pulse modulation signal converting the sine wave PN signal into a radio signal. The radio frequency tag distance measuring device 10 receives a compression pulse modulation signal executing time compression processing to the diffusion pulse modulation signal with the radio frequency tag. The radio frequency tag distance measuring device 10 calculates a distance up to the radio frequency tag based on a phase difference between the reference sine wave signal being an origin generating the sine wave PN signal and the reference sine wave signal included in a received compression pulse modulation signal. COPYRIGHT: (C)2010,JPO&INPIT
    • 4. 发明专利
    • Reception method using a multi-antenna receiver and multi-antenna receiver
    • 空值
    • JP5325624B2
    • 2013-10-23
    • JP2009072021
    • 2009-03-24
    • 日本無線株式会社
    • 政行 高橋英男 大澤重幸 浅見弘幸 木田康史 鹿島国充 新井
    • H04B7/10H04B7/08H04J11/00
    • Y02D70/00Y02D70/442Y02D70/444
    • PROBLEM TO BE SOLVED: To provide an interference wave removing device capable of improving SINR (signal to interference and noise ratio) even if an interference wave not synchronized with a symbol in an OFDM (orthogonal frequency division multiplexing signal) signal as a desired wave exists. SOLUTION: A multi-antenna receiver has: an output power minimizing section for calculating a first weighting coefficient for suppressing an interference wave included in reception signals received by a plurality of antennas, by using an output power minimum reference algorithm, acquiring a symbol synchronization and setting the first weighting coefficient at 1 when the symbol synchronization is acquired; a Fourier transform section for applying Fourier transform to the reception signal received per antenna in a symbol unit by the symbol synchronization, and outputting the signal as symbol data; a weighting compositing section for calculating a second weighting coefficient to be multiplied to the Fourier-transformed symbol data per sub-carrier, and performing weighting compositing per sub-carrier on the basis of the second weighting coefficient; and a demodulating section for demodulating the signal after weighting compositing. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:即使在与OFDM(正交频分复用信号)信号中的符号不​​同步的干扰波作为干扰波去除装置,也可以提供能够改善SINR(信号与干扰和噪声比)的干扰波去除装置 存在所需波。 解决方案:多天线接收机具有:输出功率最小化部分,用于通过使用输出功率最小参考算法来计算用于抑制由多个天线接收的接收信号中包括的干扰波的第一加权系数,获取 符号同步并且当获取符号同步时将第一加权系数设置为1; 傅里叶变换部分,用于通过符号同步以符号单位向每个天线接收的接收信号应用傅里叶变换,并将该信号作为符号数据输出; 加权合成部分,用于计算要乘以每个子载波的傅立叶变换符号数据的第二加权系数,并且基于第二加权系数对每个子载波执行加权合成; 以及解调部,用于对加权合成后的信号进行解调。 版权所有(C)2011,JPO&INPIT