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1. 发明申请

WO2007117325A2 COARSE BIN FREQUENCY SYNCHRONIZATION IN A COMMUNICATION SYSTEM 审中-公开
标题翻译：通信系统中的混合频率同步
公开(公告)号：WO2007117325A2
公开(公告)日：2007-10-18
申请号：PCT/US2006/062125
申请日：2006-12-14
申请人： QUALCOMM INCORPORATED , PATEL, Shimman , LAI, Kuei-chiang , GLAZKO, Serguei A.
发明人： PATEL, Shimman , LAI, Kuei-chiang , GLAZKO, Serguei A.
CPC分类号： H04L27/2695 , H04L5/0048 , H04L25/022 , H04L25/0228 , H04L27/2613 , H04L27/2659 , H04L27/2662 , H04L27/3872 , H04L2027/0034 , H04L2027/0065
摘要： For frequency bin error estimation, multiple hypotheses are formed for different frequency bin errors, pilot offsets, or combinations of frequency bin error and pilot offset. For each hypothesis, received symbols are extracted from the proper subbands determined by the hypothesis. In one scheme, the extracted received symbols for each hypothesis are despread with a scrambling sequence to obtain despread symbols for that hypothesis. A metric is derived for each hypothesis based on the despread symbols, e.g., by deriving a channel impulse response estimate based on the despread symbols and then deriving the metric based on the channel impulse response estimate. In another scheme, the extracted received symbols for each hypothesis are correlated, and a metric is derived based on the correlation results. For both schemes, the frequency bin error and/or the pilot offset are determined based on the metrics for all hypotheses evaluated.
摘要翻译：对于频率块误差估计，针对不同的频率误差，导频偏移或频率误差和导频偏移的组合形成多个假设。对于每个假设，从由假设确定的适当子带中提取接收符号。在一个方案中，每个假设的提取的接收符号用加扰序列解扩，以获得该假设的解扩符号。基于解扩符号导出针对每个假设的度量，例如通过基于解扩符号导出信道脉冲响应估计，然后基于信道脉冲响应估计导出度量。在另一方案中，将每个假设的提取的接收符号相关联，并且基于相关结果导出度量。对于两种方案，基于所评估的所有假设的度量来确定频率块误差和/或导频偏移。

2. 发明申请

WO2007059520A1 SYNCHRONISATION IN A MULTICARRIER RECEIVER WITH GUARD INTERVAL CARRELATION 审中-公开
标题翻译：在具有卫星间隔驻留的多功能接收机中的同步
公开(公告)号：WO2007059520A1
公开(公告)日：2007-05-24
申请号：PCT/US2006/060950
申请日：2006-11-15
申请人： QUALCOMM INCORPORATED , GLAZKO, Serguei A. , LAI, Kuei-chiang , PATEL, Shimman
发明人： GLAZKO, Serguei A. , LAI, Kuei-chiang , PATEL, Shimman
IPC分类号： H04L27/26
CPC分类号： H04L27/2665 , H04L27/2678 , H04L27/2688 , H04L27/2695
摘要： Techniques for performing time tracking at a receiver are described. A first arriving path (FAP) and a last arriving path (LAP) are detected based on a channel impulse response estimate for a communication channel. The detected FAP and LAP may be correct or swapped. To resolve ambiguity in the detected FAP and LAP, a first hypothesis corresponding to the FAP and LAP being correctly detected and a second hypothesis corresponding to the FAP and LAP being incorrectly detected are evaluated. For each hypothesis, hypothesized FAP and LAP are determined based on the detected FAP and LAP, a correlation window is determined based on the hypothesized FAP and LAP, and correlation is performed using the correlation window. The correct hypothesis is determined based on correlation results for the two hypotheses. The receiver timing is updated based on the hypothesized FAP and LAP for the correct hypothesis and used for demodulation.
摘要翻译：描述用于在接收机处执行时间跟踪的技术。基于通信信道的信道脉冲响应估计来检测第一到达路径（FAP）和最后到达路径（LAP）。检测到的FAP和LAP可能是正确的或交换的。为了解决检测到的FAP和LAP中的歧义，评估了正确检测到对应于FAP和LAP的第一假设，以及对应于正确检测到的FAP和LAP的第二假说。对于每个假设，基于检测到的FAP和LAP来确定假设的FAP和LAP，基于假设的FAP和LAP来确定相关窗口，并且使用相关窗口来执行相关性。基于两个假设的相关结果确定正确的假设。基于假设的FAP和LAP对于正确假设更新接收机定时并用于解调。

3. 发明授权

EP1949636B1 SYNCHRONISATION IN A MULTICARRIER RECEIVER WITH GUARD INTERVAL CARRELATION 有权
公开(公告)号：EP1949636B1
公开(公告)日：2018-07-25
申请号：EP06839907.0
申请日：2006-11-15
申请人： QUALCOMM Incorporated
发明人： GLAZKO, Serguei A. , LAI, Kuei-chiang , PATEL, Shimman
IPC分类号： H04L27/26
CPC分类号： H04L27/2665 , H04L27/2678 , H04L27/2688 , H04L27/2695
摘要： Techniques for performing time tracking at a receiver are described. A first arriving path (FAP) and a last arriving path (LAP) are detected based on a channel impulse response estimate for a communication channel. The detected FAP and LAP may be correct or swapped. To resolve ambiguity in the detected FAP and LAP, a first hypothesis corresponding to the FAP and LAP being correctly detected and a second hypothesis corresponding to the FAP and LAP being incorrectly detected are evaluated. For each hypothesis, hypothesized FAP and LAP are determined based on the detected FAP and LAP, a correlation window is determined based on the hypothesized FAP and LAP, and correlation is performed using the correlation window. The correct hypothesis is determined based on correlation results for the two hypotheses. The receiver timing is updated based on the hypothesized FAP and LAP for the correct hypothesis and used for demodulation.

4. 发明公开

EP1999922A2 FREQUENCY SYNCHRONIZATION FOR MULTICARRIER TRANSMISSION 审中-公开
标题翻译：频率同步有关更多支持传输
公开(公告)号：EP1999922A2
公开(公告)日：2008-12-10
申请号：EP06850959.5
申请日：2006-12-14
申请人： Qualcomm Incorporated
发明人： PATEL, Shimman , LAI, Kuei-chiang , GLAZKO, Serguei A.
IPC分类号： H04L27/26
CPC分类号： H04L27/2695 , H04L5/0048 , H04L25/022 , H04L25/0228 , H04L27/2613 , H04L27/2659 , H04L27/2662 , H04L27/3872 , H04L2027/0034 , H04L2027/0065
摘要： For frequency bin error estimation, multiple hypotheses are formed for different frequency bin errors, pilot offsets, or combinations of frequency bin error and pilot offset. For each hypothesis, received symbols are extracted from the proper subbands determined by the hypothesis. In one scheme, the extracted received symbols for each hypothesis are despread with a scrambling sequence to obtain despread symbols for that hypothesis. A metric is derived for each hypothesis based on the despread symbols, e.g., by deriving a channel impulse response estimate based on the despread symbols and then deriving the metric based on the channel impulse response estimate. In another scheme, the extracted received symbols for each hypothesis are correlated, and a metric is derived based on the correlation results. For both schemes, the frequency bin error and/or the pilot offset are determined based on the metrics for all hypotheses evaluated.

5. 发明公开

EP1949636A1 SYNCHRONISATION IN A MULTICARRIER RECEIVER WITH GUARD INTERVAL CARRELATION 有权
标题翻译：同步在防护间隔对比一个多载波接收
公开(公告)号：EP1949636A1
公开(公告)日：2008-07-30
申请号：EP06839907.0
申请日：2006-11-15
申请人： QUALCOMM Incorporated
发明人： GLAZKO, Serguei A. , LAI, Kuei-chiang , PATEL, Shimman
IPC分类号： H04L27/26
CPC分类号： H04L27/2665 , H04L27/2678 , H04L27/2688 , H04L27/2695
摘要： Techniques for performing time tracking at a receiver are described. A first arriving path (FAP) and a last arriving path (LAP) are detected based on a channel impulse response estimate for a communication channel. The detected FAP and LAP may be correct or swapped. To resolve ambiguity in the detected FAP and LAP, a first hypothesis corresponding to the FAP and LAP being correctly detected and a second hypothesis corresponding to the FAP and LAP being incorrectly detected are evaluated. For each hypothesis, hypothesized FAP and LAP are determined based on the detected FAP and LAP, a correlation window is determined based on the hypothesized FAP and LAP, and correlation is performed using the correlation window. The correct hypothesis is determined based on correlation results for the two hypotheses. The receiver timing is updated based on the hypothesized FAP and LAP for the correct hypothesis and used for demodulation.

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