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1. 发明授权

US07508866B2 Acquisition matched filter for W-CDMA systems providing frequency offset robustness 有权
标题翻译： W-CDMA系统采集匹配滤波器提供频偏功能
公开(公告)号：US07508866B2
公开(公告)日：2009-03-24
申请号：US11494660
申请日：2006-07-27
申请人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
发明人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
IPC分类号： H04B1/69 , H04L27/06
CPC分类号： H04B1/7077 , H04B1/7093
摘要： A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal acquisition procedure performed in the receiver. In operation, a Stage 1 filter matches a sequence which is repeated a number of times according to a second sequence within a secondary synchronization sub-channel of the spread-spectrum signal. The Stage 2 filter of the invention then filters the output of the Stage 1 filter in order to recover a secondary synchronization code. The Stage 2 filters the output of the Stage 1 filter using three matched filters of its own. The first and second filters sample different taps of a sequence output from the Stage 1 filter. The third filter samples a predetermined number of taps overlapping taps for the first and second filters in a way that resolves ambiguities with respect to the identification of the sequence. The ambiguity resolution performed by the third filter improves the frequency offset robustness and thus the overall performance of the receiver.
摘要翻译：用于获取发送的扩频信号的系统和方法使用在接收机中执行的初始信号获取过程的第二阶段中优选地用作阶段2滤波器的匹配滤波器配置。在操作中，阶段1滤波器根据扩展频谱信号的辅同步子信道中的第二序列重复多次重复的序列。然后，本发明的阶段2滤波器对第一阶段滤波器的输出进行滤波，以恢复次同步码。阶段2使用自己的三个匹配的过滤器过滤第一阶段过滤器的输出。第一个和第二个滤波器从Stage 1滤波器中抽取出序列输出的不同抽头。第三滤波器以解决相对于序列的识别的模糊度的方式针对第一和第二滤波器对预定数量的抽头重叠抽头进行抽样。由第三滤波器执行的模糊度分辨率提高了频率偏移鲁棒性，从而提高了接收机的整体性能。

2. 发明授权

US07106787B2 Acquisition matched filter for W-CDMA systems providing frequency offset robustness 有权
公开(公告)号：US07106787B2
公开(公告)日：2006-09-12
申请号：US09994763
申请日：2001-11-28
申请人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
发明人： Li Fung Chang , Kapil Chawla , Nelson Sollenberger
IPC分类号： H04B1/707
CPC分类号： H04B1/7077 , H04B1/7093
摘要： A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal acquisition procedure performed in the receiver. In operation, a Stage 1 filter matches a sequence which is repeated a number of times according to a second sequence within a secondary synchronization sub-channel of the spread-spectrum signal. The Stage 2 filter of the invention then filters the output of the Stage 1 filter in order to recover a secondary synchronization code. The Stage 2 filters the output of the Stage 1 filter using three matched filters of its own. The first and second filters sample different taps of a sequence output from the Stage 1 filter. The third filter samples a predetermined number of taps overlapping taps for the first and second filters in a way that resolves ambiguities with respect to the identification of the sequence. The ambiguity resolution performed by the third filter improves the frequency offset robustness and thus the overall performance of the receiver.

3. 发明申请

US20060262837A1 Acquisition matched filter for W-CDMA systems providing frequency offset robustness 有权
公开(公告)号：US20060262837A1
公开(公告)日：2006-11-23
申请号：US11494660
申请日：2006-07-27
申请人： Li Chang , Kapil Chawla , Nelson Sollenberger
发明人： Li Chang , Kapil Chawla , Nelson Sollenberger
IPC分类号： H04B1/707 , H04B1/00
CPC分类号： H04B1/7077 , H04B1/7093
摘要： A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal acquisition procedure performed in the receiver. In operation, a Stage 1 filter matches a sequence which is repeated a number of times according to a second sequence within a secondary synchronization sub-channel of the spread-spectrum signal. The Stage 2 filter of the invention then filters the output of the Stage 1 filter in order to recover a secondary synchronization code. The Stage 2 filters the output of the Stage 1 filter using three matched filters of its own. The first and second filters sample different taps of a sequence output from the Stage 1 filter. The third filter samples a predetermined number of taps overlapping taps for the first and second filters in a way that resolves ambiguities with respect to the identification of the sequence. The ambiguity resolution performed by the third filter improves the frequency offset robustness and thus the overall performance of the receiver.

4. 发明申请

US20050286467A1 Dynamic channel assignment 有权
公开(公告)号：US20050286467A1
公开(公告)日：2005-12-29
申请号：US11217045
申请日：2005-09-01
申请人： Li Chang , Kapil Chawla , Justin Chuang , Bruce McNair , Xiaoxin Qiu
发明人： Li Chang , Kapil Chawla , Justin Chuang , Bruce McNair , Xiaoxin Qiu
IPC分类号： H04W16/10 , H04W72/08 , H04Q7/00
CPC分类号： H04W72/082
摘要： This invention provides interference predictions, suitable for least interference dynamic channel assignment use or other frequency hopping uses by de-coupling the time slot assignment and the frequency hopping pattern assignment. In particular, a least interfered time slot is selected based on an aggregate interference measurement performed across an entire transmission band or a pre-specified range of frequencies in the transmission band. A user is assigned a least interfered time slot and provided an appropriate frequency hopping pattern.

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