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1. 发明申请

US20080008261A1 Method for Signal Processing and a Signal Processor in an Ofdm System 审中-公开
标题翻译：信号处理方法和OFDM系统中的信号处理器
公开(公告)号：US20080008261A1
公开(公告)日：2008-01-10
申请号：US11569596
申请日：2005-05-20
申请人： Constant Paul Marie Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
发明人： Constant Paul Marie Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
IPC分类号： H04L25/03 , H04J11/00
CPC分类号： H04L25/022 , H04L25/03159 , H04L27/2647 , H04L2025/03414 , H04L2025/03496 , H04L2025/03503 , H04L2025/03611
摘要： A method of signal processing and a signal processor for a receiver for OFDM encoded digital signals. OFDM encoded digital signals are transmitted as data symbol sub-carriers in several frequency channels. A subset of the sub-carriers is in the form of pilot sub-carriers having a pilot value (ap) known to the receiver. The method comprises estimation of a channel transfer function (H) and a derivative of the channel transfer function (H′) by means of a channel estimation scheme from a received signal (y). Then, an estimation of data (a) is performed from the received signal (y) and the channel transfer function (H). Finally, an estimation of a cleaned received signal (y2) is performed from the data (a), the derivative of the channel transfer function (H′) and the received signal (y) by removal of inter-carrier interference (ICI), by taking into account at least one of a previous and a future OFDM symbol, followed by an iteration of the above-mentioned estimations.
摘要翻译：一种信号处理方法和用于OFDM编码数字信号的接收机的信号处理器。 OFDM编码数字信号作为多个频率信道中的数据符号子载波发送。子载波的子集是具有接收机已知的导频值（导频值）的导频子载波的形式。该方法包括通过从接收到的信道估计方案估计信道传递函数（ H）和信道传递函数（ H'）的导数信号（ y）。然后，从接收信号（ y）和通道传递函数（ H）执行数据的估计（ a）。最后，从数据（ y 2）的估计，信道的导数通过去除载波间干扰（ICI）的传输函数（ H'）和接收信号（ y），考虑到前一个和未来的OFDM符号，随后是上述估计的迭代。

2. 发明申请

US20070297522A1 Method for Signal Processing and a Signal Processor in an Ofdm System 审中-公开
标题翻译：信号处理方法和OFDM系统中的信号处理器
公开(公告)号：US20070297522A1
公开(公告)日：2007-12-27
申请号：US11569595
申请日：2005-05-24
申请人： Constant Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
发明人： Constant Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L25/0234 , H04L2025/03414 , H04L2025/03522 , H04L2025/03605
摘要： A method of signal processing for a receiver for OFDM encoded digital signals, for counteracting inter-carrier interference (ICI) caused by Doppler broadening. The OFDM encoded digital signals are transmitted as sub-carriers in several channels, which form OFDM blocks. The method comprises estimation of a channel transfer function (Ĥ1) by a channel estimation scheme in each sub-carrier and estimation of data (â1) by a data estimation scheme from said channel transfer function (Ĥ1) and a received signal (y0). Then, a derivative (Hj′) of said channel transfer function in each sub-carrier is estimated by a temporal filtering; and the inter-carrier interference (ICI) is removed from said received signal by using the estimated data (â1) and the estimated derivative (Hj′) of the channel transfer function in order to obtain a cleaned received signal (y1).
摘要翻译：一种用于OFDM编码数字信号的接收机的信号处理方法，用于抵消由多普勒展宽引起的载波间干扰（ICI）。 OFDM编码的数字信号作为子载波在几个信道中发送，形成OFDM块。该方法包括通过每个子载波中的信道估计方案和数据的估计（ H 1）通过来自所述信道传递函数（ H 1）的数据估计方案和接收信号（ y ）。然后，通过时间滤波来估计每个子载波中的所述信道传递函数的导数（ H“j”）; 并且通过使用估计数据（→1）和估计的导数（ y 1）。

3. 发明申请

US20070217327A1 A METHOD FOR SIGNAL PROCESSING AND A SIGNAL PROCESSOR IN AN OFDM SYSTEM 审中-公开
标题翻译：信号处理的方法和OFDM系统中的信号处理器
公开(公告)号：US20070217327A1
公开(公告)日：2007-09-20
申请号：US11569594
申请日：2005-05-24
申请人： Constant Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
发明人： Constant Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
IPC分类号： H04J11/00
CPC分类号： H04L25/03159 , H04L25/0234 , H04L25/0236 , H04L2025/03414 , H04L2025/03605
摘要： A method of signal processing for a receiver for OFDM encoded digital signals. The OFDM encoded digital signals are transmitted as data symbol sub-carriers in several frequency channels. A subset of the sub-carriers is in the form of pilot sub-carriers having a pilot value (ap) known to the receiver. First, a received signal (y0) is obtained, followed by a first estimation of a pilot channel transfer function (H0)at pilot sub-carriers from said received signal (y0) and said known pilot values (ap). Then a second estimation of a channel transfer function (H1) is performed at all sub-carriers from said pilot channel transfer function (H0). A third estimation of a derivative (H′1) of the channel transfer function (H1) is performed from the channel transfer function (H1) and a channel transfer function (H3) from a past OFDM symbol. Finally, a fourth estimation of a cleaned received signal (y1) is performed from said derivative (H′1), said received signal (y0) and said pilot values (ap) by removal of pilot-induced interference.
摘要翻译：一种用于OFDM编码数字信号的接收机的信号处理方法。 OFDM编码数字信号作为多个频率信道中的数据符号子载波发送。子载波的子集是具有接收机已知的导频值（导频值）的导频子载波的形式。首先，获得接收到的信号（y 0> 0），接着在导频子载波上从所述接收信号中首先估计导频信道传递函数（H 0> 0）（y <0> 0）和所述已知导频值（a _{p ）。然后，在来自所述导频信道传递函数（H 0> 0）的所有子载波上执行信道传递函数（H SUB）的第二估计。从信道传递函数（H 1> 1）执行信道传递函数（H 1> 1）的导数（H'1）的第三估计和信道传递函数（H 3 3）从过去的OFDM符号。最后，从所述导数（H'1> 1）执行清除的接收信号（y 1> 1）的第四估计，所述接收信号（y 0 < SUB>）和所述导频值（a _{p ）通过去除导频干扰。}}

4. 发明申请

US20070211827A1 Channel Estimation in an Ofdm System With High Doppler Shift 审中-公开
标题翻译：具有高多普勒频移的OFDM系统中的信道估计
公开(公告)号：US20070211827A1
公开(公告)日：2007-09-13
申请号：US11569444
申请日：2005-05-23
申请人： Constant Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
发明人： Constant Baggen , Sri Husen , Maurice Stassen , Hoi Tsang
IPC分类号： H04L27/26
CPC分类号： H04L25/0232 , H04L25/022 , H04L25/0256 , H04L27/2602 , H04L27/2647 , H04L2025/03496
摘要： A method of signal processing and a signal processor for a receiver for OFDM encoded digital signals. The OFDM encoded digital signals are transmitted as data symbol sub-carriers in several frequency channels. A subset of said sub carriers is in the form of pilot sub-carriers having a value known to the receiver. A first estimation of channel coefficients (H0) at said pilot sub-carriers is performed followed by cleaning of the estimated channel coefficients (H0) at the pilot sub-carriers. Then, a second estimation of channels coefficients (H1) is performed at the data symbol sub-carriers. The first estimation is performed by dividing received symbols (yp) at said pilot sub-carriers by the known pilot symbols (ap). the channel frequency response is supposed to vary linearly within one OFDM symbol. Therefore for each symbol and sub-band, a channel frequency response and its derivate are calculated or interpolated.
摘要翻译：一种信号处理方法和用于OFDM编码数字信号的接收机的信号处理器。 OFDM编码数字信号作为多个频率信道中的数据符号子载波发送。所述子载波的子集是具有接收机已知的值的导频子载波的形式。执行所述导频子载波处的信道系数（H 0> 0）的第一估计，然后清除导频子载波处的估计信道系数（H SUB）。然后，在数据符号子载波上执行信道系数（H 1> 1）的第二估计。通过将所述导频子载波处的接收符号（y SUB p）除以已知的导频符号（a> SUB）来执行第一估计。假设信道频率响应在一个OFDM符号内线性变化。因此，对于每个符号和子带，计算或内插信道频率响应及其导数。

5. 发明申请

US20050134256A1 System for processing electronic devices 有权
标题翻译：电子设备处理系统
公开(公告)号：US20050134256A1
公开(公告)日：2005-06-23
申请号：US10741862
申请日：2003-12-19
申请人： Chi Cheng , Hoi Tsang , Chi Yeung , Wang Lung Tse
发明人： Chi Cheng , Hoi Tsang , Chi Yeung , Wang Lung Tse
IPC分类号： H01L21/02 , G01N21/956 , G01R1/00 , G01R31/28 , H01L21/00 , H01L21/50 , H01L21/66 , H05K13/00
CPC分类号： G01R31/2893 , G01N21/956
摘要： A system is provided for processing electronic devices, and in particular for handling, inspecting, sorting and offloading the same. An apparatus for inspecting an electronic device comprises a holder for supporting the electronic device and a driving mechanism for moving the electronic device between an onloading position where the electronic device is placed onto the holder and an offloading position where the electronic device is removed from the holder. A first optical system between the onloading and offloading positions is configured to inspect a first surface of the electronic device while it is supported by the holder, Concurrently or subsequently, a second optical system between the onloading and offloading positions is configured to inspect a second surface of the electronic device that is opposite to the first surface while it is supported by the holder.
摘要翻译：提供一种用于处理电子设备的系统，特别是用于处理，检查，分类和卸载它们的系统。一种用于检查电子装置的装置包括一个用于支撑该电子装置的支架和一个驱动机构，用于使电子装置在电子装置放置在保持架上的装载位置和电子装置从支架上移出的卸载位置之间移动。负载和卸载位置之间的第一光学系统被配置为在由所述保持器支撑的同时检查所述电子设备的第一表面，并且所述第二光学系统在所述上载位置和卸载位置之间并行地或后续地被配置为检查所述第二表面与第一表面相对的电子设备。

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