会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • APPARATUS AND METHOD FOR PROVIDING BANDWIDTH OF COGNITIVE RADIO SYSTEM
    • 提供认知无线电系统带宽的装置和方法
    • US20110122831A1
    • 2011-05-26
    • US12674901
    • 2008-06-13
    • Sang-Won KimMyung Sun SongChang Hyun ParkSun Min Lim
    • Sang-Won KimMyung Sun SongChang Hyun ParkSun Min Lim
    • H04W72/04
    • H04B1/28
    • The present invention relates to an apparatus and method for providing a bandwidth of a cognitive radio system. An apparatus and method for providing a bandwidth of a cognitive radio system according to an exemplary embodiment of the present invention calculates an oscillation frequency of a local signal that changes, by a predetermined value, center frequencies of fractional bands as bands that arc not used temporally and spatially in partial bands of an externally provided broadcasting channel band. The apparatus and method for providing a bandwidth of a cognitive radio system outputs a first local signal at the calculated oscillation frequency, mixes the output first local signal and an external signal, and moves center frequencies of fractional bands of the external signal by a predetermined value. The apparatus and method for providing a bandwidth of a cognitive radio system Filters a frequency band that is higher than an upper limit of a pass band having a predetermined bandwidth among moved frequency bands of the fractional bands to extract a first signal. Then, the apparatus and method for providing a bandwidth of a cognitive radio system mixes the extracted first signal and a second local signal and moves the center frequencies of the fractional bands in the first signal. The apparatus and method for providing a bandwidth of a cognitive radio system filters a frequency band that is lower than a lower limit of the pass band among the moved frequency bands of the fractional bands to extract at least one fractional band. The apparatus and method for providing a bandwidth of a cognitive radio system provides the extracted fractional band to a terminal and a base station, thereby improving frequency utilization efficiency.
    • 本发明涉及一种用于提供认知无线电系统的带宽的装置和方法。 根据本发明的示例性实施例的用于提供认知无线电系统的带宽的装置和方法计算本地信号的振荡频率,该本地信号的振荡频率以预定值变化,作为不是暂时使用的频带的分数频带的中心频率 并且在空间上在外部提供的广播频道频带的部分频带中。 用于提供认知无线电系统的带宽的装置和方法以计算的振荡频率输出第一本地信号,混合输出第一本地信号和外部信号,并将外部信号的分数段的中心频率移动预定值 。 用于提供认知无线电系统的带宽的装置和方法在分数段的移动频带之中过滤高于具有预定带宽的通带的上限的频带以提取第一信号。 然后,用于提供认知无线电系统的带宽的装置和方法将提取的第一信号和第二本地信号混合,并移动第一信号中的分数频带的中心频率。 用于提供认知无线电系统的带宽的装置和方法对分数段的移动频带中低于通带下限的频带进行滤波以提取至少一个分数频带。 用于提供认知无线电系统的带宽的装置和方法将提取的分数频带提供给终端和基站,从而提高频率利用效率。
    • 7. 发明申请
    • METHOD OF FREQUENCY CHANNEL ASSIGNMENT USING EFFECTIVE SPECTRUM SENSING IN MULTIPLE FREQUENCY ASSIGNMENT SYSTEM
    • 在多频分配系统中使用有效频谱感测的频率信道分配方法
    • US20090161610A1
    • 2009-06-25
    • US12089948
    • 2006-10-13
    • Bub Joo KangMyung Sun SongChang Joo Kim
    • Bub Joo KangMyung Sun SongChang Joo Kim
    • H04W72/00
    • H04W16/14H04B1/715H04W16/10H04W72/042H04W72/06H04W72/085H04W72/10
    • Provided is a method of assigning a frequency channel using efficient spectrum sensing in a multiple Frequency Assignment (FA) system. The method includes a channel sensing process, wherein abase station (BS) of a secondary user classifies multiple frequency channels licensed to a primary user into a plurality of channel states by changing a sensing period according to the types of classified channel state sets, and manages the sensed channel states as frequency channel state set information; a channel state set broadcasting process, wherein the BS transmits the frequency channel state set information manage d in the channel sensing process to secondary user terminals using a broadcast message; and a channel assigning process, wherein if the BS receives a channel assignment request message from a new secondary user terminal which has received the broadcast message, the BS assigns an unused frequency channel from among frequency channels licensed to the primary user to the new secondary user terminal using the frequency channel state set information. Accordingly, a frequency channel can be assigned to a secondary user requesting channel assignment using frequency channel state set information without a primary user experiencing interference noise.
    • 提供了一种在多频分配(FA)系统中使用有效频谱感测来分配频道的方法。 该方法包括信道感测过程,其中次要用户的基站(BS)根据分类信道状态集的类型改变感测周期,将许可给主用户的多个频率信道分类为多个信道状态,并且管理 感测信道状态为频道状态集信息; 信道状态集广播处理,其中,所述BS使用广播消息将频道感测处理中的频道状态集信息管理d发送给次用户终端; 以及信道分配处理,其中,如果所述BS从已经接收到所述广播消息的新的辅助用户终端接收到信道分配请求消息,则所述BS将许可给所述主用户的频率信道中的未使用的频率信道分配给所述新的辅助用户 终端使用频道状态集信息。 因此,频率信道可以被分配给辅助用户使用频道状态集信息来请求信道分配,而不会使主用户遇到干扰噪声。