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公开(公告)号:US20080101484A1
公开(公告)日:2008-05-01
申请号:US11590885
申请日:2006-11-01
申请人: Wen-Rong Wu , Chao-Yuan Hsu
发明人: Wen-Rong Wu , Chao-Yuan Hsu
IPC分类号: H04K1/10
CPC分类号: H04L25/03159 , H04L2025/03643 , H04L2025/03668
摘要: In high-speed mobile environments, the channel is time-varying within an OFDM symbol. This time-varying characteristic will destroy the orthogonality among subcarriers. Thus, the intercarrier interference (ICI) will occur and the system performance will be degraded. An ICI mitigation method for high-speed mobile OFDM systems is proposed, which explores the special structure of the ICI channel matrix and applies the Newton's iterative matrix inversion method. With our formulation, fast Fourier transform (FFT) can be used to reduce the computational complexity. The object of canceling the ICI can be accomplished without the need of any extra circuit.
摘要翻译: 在高速移动环境中,信道在OFDM符号内是随时间变化的。 这种时变特性将破坏子载波之间的正交性。 因此,将发生载波间干扰(ICI),并且系统性能将下降。 提出了一种用于高速移动OFDM系统的ICI缓解方法,探讨了ICI信道矩阵的特殊结构,并应用牛顿迭代矩阵求逆法。 通过我们的配方,可以使用快速傅立叶变换(FFT)来降低计算复杂度。 可以实现取消ICI的目的,而不需要任何额外的电路。
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公开(公告)号:US20060030324A1
公开(公告)日:2006-02-09
申请号:US11161435
申请日:2005-08-03
申请人: Chao-Yuan HSU , Yao-Ting Hsieh , Chu-Ching Yang
发明人: Chao-Yuan HSU , Yao-Ting Hsieh , Chu-Ching Yang
IPC分类号: H04Q7/20
摘要: A cell reselection method includes determining if a first C1 parameter corresponding to the serving cell is greater than a predetermined value. If the first C1 parameter is greater than the predetermined value, the method then determines if a second C2 parameter corresponding to a neighboring cell is greater than a sum of a first C2 parameter corresponding to the serving cell and a threshold value for a predetermined period. And if the second C2 parameter is greater than the sum of the first C2 parameter and the threshold for the predetermined time, cell reselection for the mobile subscriber is executed.
摘要翻译: 小区重选方法包括确定与服务小区相对应的第一C1参数是否大于预定值。 如果第一C1参数大于预定值,则该方法然后确定对应于相邻小区的第二C2参数是否大于对应于服务小区的第一C2参数和预定时段的阈值的和。 并且如果第二C2参数大于预定时间的第一C2参数和阈值的总和,则执行移动用户的小区重选。
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公开(公告)号:US20120064937A1
公开(公告)日:2012-03-15
申请号:US13184610
申请日:2011-07-18
申请人: Fabien Petitgrand , Yu-Tai Chang , Chao-Yuan Hsu , Li-Ping Yu , Tai-Li Chiang
发明人: Fabien Petitgrand , Yu-Tai Chang , Chao-Yuan Hsu , Li-Ping Yu , Tai-Li Chiang
IPC分类号: H04W52/04
CPC分类号: H04W52/0212 , Y02D70/24
摘要: A wireless communication device is a mobile station of a wireless communication network system. In an idle mode, when the wireless communication device enters a startup state from a sleep state to prepare for receiving a paging message, base station (BS) measurement is performed at least once before the paging message is received.
摘要翻译: 无线通信设备是无线通信网络系统的移动台。 在空闲模式中,当无线通信设备从休眠状态进入启动状态以准备接收寻呼消息时,在接收到寻呼消息之前至少进行一次基站(BS)测量。
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公开(公告)号:US07299045B2
公开(公告)日:2007-11-20
申请号:US11161435
申请日:2005-08-03
申请人: Chao-Yuan Hsu , Yao-Ting Hsieh , Chu-Ching Yang
发明人: Chao-Yuan Hsu , Yao-Ting Hsieh , Chu-Ching Yang
IPC分类号: H04Q7/20
摘要: A cell reselection method includes determining if a first C1 parameter corresponding to the serving cell is greater than a predetermined value. If the first C1 parameter is greater than the predetermined value, the method then determines if a second C2 parameter corresponding to a neighboring cell is greater than a sum of a first C2 parameter corresponding to the serving cell and a threshold value for a predetermined period. And if the second C2 parameter is greater than the sum of the first C2 parameter and the threshold for the predetermined time, cell reselection for the mobile subscriber is executed.
摘要翻译: 小区重选方法包括确定与服务小区相对应的第一C1参数是否大于预定值。 如果第一C1参数大于预定值,则该方法然后确定对应于相邻小区的第二C2参数是否大于对应于服务小区的第一C2参数和预定时段的阈值的和。 并且如果第二C2参数大于预定时间的第一C2参数和阈值的总和,则执行移动用户的小区重选。
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公开(公告)号:US09060334B2
公开(公告)日:2015-06-16
申请号:US13184610
申请日:2011-07-18
申请人: Fabien Petitgrand , Yu-Tai Chang , Chao-Yuan Hsu , Li-Ping Yu , Tai-Li Chiang
发明人: Fabien Petitgrand , Yu-Tai Chang , Chao-Yuan Hsu , Li-Ping Yu , Tai-Li Chiang
CPC分类号: H04W52/0212 , Y02D70/24
摘要: A wireless communication device is a mobile station of a wireless communication network system. In an idle mode, when the wireless communication device enters a startup state from a sleep state to prepare for receiving a paging message, base station (BS) measurement is performed at least once before the paging message is received.
摘要翻译: 无线通信设备是无线通信网络系统的移动台。 在空闲模式中,当无线通信设备从休眠状态进入启动状态以准备接收寻呼消息时,在接收到寻呼消息之前至少进行一次基站(BS)测量。
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公开(公告)号:US20050239482A1
公开(公告)日:2005-10-27
申请号:US10907858
申请日:2005-04-19
申请人: Chen-Huang Fan , Sheng-Yi Chiu , Chao-Yuan Hsu
发明人: Chen-Huang Fan , Sheng-Yi Chiu , Chao-Yuan Hsu
CPC分类号: H04W48/04
摘要: BCCH signals are emitted from a communication-blocking device with higher power according to system data got from base stations. TMSI of mobile subscribers is collected. Paging of the mobile subscriber is monitored. When it is determined that a mobile subscriber is to receive a call, the communication-blocking device sends blocking RA in all time slots, making the mobile subscriber fail to get the call.
摘要翻译: 根据从基站得到的系统数据,BCCH信号从具有较高功率的通信阻塞装置发出。 收集移动用户的TMSI。 监控移动用户的寻呼。 当确定移动用户要接收呼叫时,通信阻断装置在所有时隙中发送阻塞RA,使得移动用户无法接通呼叫。
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