专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07352704B1 Method and apparatus for multi-path delay spread detection in wideband CDMA systems 有权
标题翻译：用于宽带CDMA系统中多径延迟扩展检测的方法和装置
公开(公告)号：US07352704B1
公开(公告)日：2008-04-01
申请号：US10651850
申请日：2003-08-29
申请人： Karim Nassiri Toussi , Rajaram Subramoniam , Huoy-Bing Lim , Debarag Banerjee
发明人： Karim Nassiri Toussi , Rajaram Subramoniam , Huoy-Bing Lim , Debarag Banerjee
IPC分类号： H04L12/26
CPC分类号： H04B1/7113 , H04B1/7075 , H04B1/7093 , H04B2201/70701
摘要： A fast, low-complexity detection scheme for determining the delays and gains of different propagation paths (i.e., multi-paths) of a received WCDMA signal. The method utilizes a continuous pilot channel that is scrambled by an known pseudo-random sequence. The received signal is provided to a multi-path searcher that passes the received signal through a matched filter with a specified number of taps. The matched filter correlates the received signal with the pilot channel. The multi-path gain and delay detection is then performed, and the delays and gains are reported for use in the WCDMA system.
摘要翻译：用于确定接收的WCDMA信号的不同传播路径（即，多路径）的延迟和增益的快速，低复杂性检测方案。该方法利用由已知伪随机序列加扰的连续导频信道。接收的信号被提供给多路径搜索器，该多路径搜索器将接收的信号通过具有指定数量的抽头的匹配滤波器。匹配滤波器将接收的信号与导频信道相关联。然后执行多径增益和延迟检测，报告延迟和增益用于WCDMA系统。

2. 发明授权

US07286589B1 Method and apparatus for generation of downlink scrambling code in wideband CDMA mobile devices 有权
标题翻译：用于在宽带CDMA移动设备中生成下行链路扰码的方法和装置
公开(公告)号：US07286589B1
公开(公告)日：2007-10-23
申请号：US10651848
申请日：2003-08-29
申请人： Karim Nassiri Toussi , Debarag Banerjee , Gokhan Cosgul
发明人： Karim Nassiri Toussi , Debarag Banerjee , Gokhan Cosgul
IPC分类号： H04B1/00
CPC分类号： H04B1/707 , H04J13/10
摘要： An initialization method is performed to initialize the states for producing downlink scrambling code for a wideband code division multiple access (WCDMA) mobile device. The initialization method uses an auxiliary linear feedback shift register (x-LFSR) advance the x-initial state to a new initial state that corresponds to a selected downlink scrambling code. The new initial state allows the remaining masks used for generating the downlink scrambling code to be fixed. Memory required to produce the downlink scrambling codes is therefore reduced, as it is no longer dedicated to storing the sets of masks corresponding to each of the possible downlink scrambling codes.
摘要翻译：执行初始化方法以初始化用于宽带码分多址（WCDMA）移动设备的用于产生下行链路扰码的状态。初始化方法使用辅助线性反馈移位寄存器（x-LFSR）将x初始状态提前到对应于所选择的下行链路扰码的新初始状态。新的初始状态允许用于生成下行链路扰码的剩余掩码是固定的。所以产生下行扰频码所需的存储器因此被减少，因为它不再专门用于存储对应于每个可能的下行链路扰码的掩码组。

3. 发明授权

US08588193B1 Enhanced wireless data rates using multiple beams 有权
标题翻译：使用多个波束增强的无线数据速率
公开(公告)号：US08588193B1
公开(公告)日：2013-11-19
申请号：US12699758
申请日：2010-02-03
申请人： Keangpo Ricky Ho , Jianhan Liu , Guocong Song , Karim Nassiri Toussi , Jeffrey M. Gilbert
发明人： Keangpo Ricky Ho , Jianhan Liu , Guocong Song , Karim Nassiri Toussi , Jeffrey M. Gilbert
IPC分类号： H04W4/00
CPC分类号： H01Q3/30 , H04B7/0617 , H04B7/0619
摘要： Enhanced wireless speeds are obtained using multiple transmission beams. In one example a transmitter sends data packets through an antenna array using multiple spatial beams and a plurality of analog converters. A receiver receives feedback from a remote station, the feedback including a quality measure of data packets received from the transmitter. A processor to controls transmission parameters of the transmitter using the feedback, the processor having a plurality of states, in a first channel analysis state, the processor determining a beam-forming vector for the antenna array, in a second beam search and training state, the processor determining pre-coding coefficients for the data packets, and in a third high rate transmission state, the processor providing pre-coded data packets to the transmitter for transmission, wherein the processor transitions from the third state to the first state upon receiving a reduced quality measure from the remote station.
摘要翻译：使用多个发射波束获得增强的无线速度。在一个示例中，发射机通过使用多个空间波束和多个模拟转换器的天线阵列发送数据分组。接收机从远程站接收反馈，反馈包括从发射机接收的数据分组的质量测量。一种处理器，用于使用所述反馈来控制所述发射机的传输参数，所述处理器在第一信道分析状态下具有多个状态，所述处理器以第二波束搜索和训练状态确定所述天线阵列的波束形成向量，所述处理器确定所述数据分组的预编码系数，并且在第三高速率传输状态中，所述处理器向所述发射机提供预编码的数据分组以进行传输，其中所述处理器在接收到所述第一状态时从所述第三状态转换到所述第一状态从远程站降低质量测量。

4. 发明授权

US08457026B1 Enhanced wireless data rates using multiple beams 有权
标题翻译：使用多个波束增强的无线数据速率
公开(公告)号：US08457026B1
公开(公告)日：2013-06-04
申请号：US12699781
申请日：2010-02-03
申请人： Keang-Po Ricky Ho , Jianhan Liu , Guocong Song , Karim Nassiri Toussi , Jeffrey M. Gilbert
发明人： Keang-Po Ricky Ho , Jianhan Liu , Guocong Song , Karim Nassiri Toussi , Jeffrey M. Gilbert
IPC分类号： H04B7/00 , H01Q3/00
CPC分类号： H01Q3/30 , H04B7/0617 , H04B7/0619
摘要： Enhanced wireless speeds are obtained using multiple transmission beams. In one example, a transmitter has a signal processor to receive a plurality of data streams, a plurality of analog converters each coupled to the signal processor to receive the plurality of data streams from the signal processor and to modulate the data streams onto carrier waves, and a plurality of phase shifters each coupled to an analog converter to each receive a modulated stream. A first antenna is coupled to more than one of the plurality of phase shifters to receive the modulated data stream from each phase shifter and transmit it on its respective carrier wave, and a second antenna is coupled to receive at least one modulated data stream and transmit it on its respective carrier wave.
摘要翻译：使用多个发射波束获得增强的无线速度。在一个示例中，发射机具有用于接收多个数据流的信号处理器，多个模拟转换器，每个模拟转换器耦合到信号处理器以从信号处理器接收多个数据流并且将数据流调制到载波上，以及多个移相器，每个移相器耦合到模拟转换器以各自接收经调制的流。第一天线耦合到多个移相器中的多于一个移相器以接收来自每个移相器的调制数据流，并在其相应的载波上进行发送，并且第二天线被耦合以接收至少一个调制数据流并传输它在其各自的载波上。

5. 发明授权

US07324617B1 Apparatus and method for detecting downlink transmit diversity at a mobile device 有权
标题翻译：用于在移动设备处检测下行链路传输分集的装置和方法
公开(公告)号：US07324617B1
公开(公告)日：2008-01-29
申请号：US10395992
申请日：2003-03-24
申请人： Debarag Narayan Banerjee , Pascal Gilles Renucci , Karim Nassiri Toussi
发明人： Debarag Narayan Banerjee , Pascal Gilles Renucci , Karim Nassiri Toussi
IPC分类号： H04B7/10
CPC分类号： H04B7/0689
摘要： A mobile device detects downlink transmit diversity. Slot and frame timing knowledge and a downlink scrambling code are applied to pilot and synch channels of the signal. An algorithm suited for the diversity case and an algorithm suited for the non-diversity case are utilized. The output of the diversity algorithm is compared to the output of the non-diversity algorithm. The output yielding the highest energy determines whether downlink transmit diversity is applied. The detection algorithms used in both the diversity and non-diversity cases use phasors to indicate the phase difference between two channels. This phase difference is the basis for determining diversity usage.
摘要翻译：移动设备检测下行链路发射分集。时隙和帧定时知识和下行链路扰码被应用于信号的导频和同步信道。利用适用于分集情况的算法和适用于非分集情况的算法。将分集算法的输出与非分集算法的输出进行比较。产生最高能量的输出决定是否应用下行链路传输分集。在分集和非分集情况下使用的检测算法使用相量来指示两个信道之间的相位差。该相位差是确定分集使用的基础。

6. 发明授权

US06788668B1 Low power long code synchronization scheme for sleep mode operation of CDMA systems 有权
标题翻译： CDMA系统睡眠模式运行的低功率长码同步方案
公开(公告)号：US06788668B1
公开(公告)日：2004-09-07
申请号：US09515222
申请日：2000-02-29
申请人： Yogendra Champaklal Shah , Reza Aghazadeh-Alavi , Karim Nassiri Toussi , Sharad D. Sambhwani
发明人： Yogendra Champaklal Shah , Reza Aghazadeh-Alavi , Karim Nassiri Toussi , Sharad D. Sambhwani
IPC分类号： H04B7216
CPC分类号： H04W52/029 , H04B2201/70709 , H04J13/0025 , H04J13/10 , Y02D70/00
摘要： In one embodiment, the present invention is a method for conserving power supplied to a linear feedback shift register (LFSR) long code (LC) generator, the method including steps of operating the LC generator during pre-assigned time slots; shutting off the LC generator during standby periods between the pre-assigned time slots; and priming starting states of the LC generator for synchronization with pre-assigned time slots following a standby period. This embodiment of the present invention enables power to be removed from the LFSR LC generator as well as the LFSR clock. Because the accuracy of the LFSR clock is usually derived from a system master transistor-controlled crystal oscillator (TCXO), and because the LFSR clock operates at a relatively high rate, the TCXO can also be powered down to conserve power. A low frequency, low power clock source can then be used instead of the higher powered clock source and TCXO to maintain operation of the mobile during the mobile sleep state.
摘要翻译：在一个实施例中，本发明是一种用于节省提供给线性反馈移位寄存器（LFSR）长码（LC）发生器的功率的方法，该方法包括在预分配时隙期间操作LC发生器的步骤; 在预分配的时隙之间的待机期间关闭LC发生器; 以及启动LC发生器的启动状态，以在等待时间段之后与预分配的时隙同步。本发明的该实施例使得能够从LFSR LC发生器以及LFSR时钟中去除功率。由于LFSR时钟的精度通常来自系统主晶体管控制晶体振荡器（TCXO），并且由于LFSR时钟以较高的速率工作，因此TCXO也可以掉电以节省功耗。然后可以使用低频，低功率时钟源而不是较高功率的时钟源和TCXO，以在移动睡眠状态期间保持移动设备的操作。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式