公开(公告)号：US20020163927A1

公开(公告)日：2002-11-07

申请号：US10187687

申请日：2002-07-01

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  Alexander M. Jacques

IPC: H04B007/216

CPC classification number: H04B1/71 ,  H04B1/70735 ,  H04B1/7101 ,  H04B1/7115

Abstract: A method is disclosed for receiving a transmitted signal in a communication system employing CDMA techniques wherein the transmitted signal includes a plurality of short codes, each of which is transmitted repetitively over a fixed period of time and where the received signal has CW interference in addition to the transmitted signal. The method includes detecting the presence of the short code in a plurality of time phases of the received signal by calculating a likelihood ratio for each phase. The likelihood ratio takes into account the current short code.

Abstract translation: 公开了一种用于在采用CDMA技术的通信系统中接收发送信号的方法，其中所发送的信号包括多个短码，每个短码在固定时间段内重复发送，并且其中接收信号除了具有CW干扰之外 发送信号。 该方法包括通过计算每个相位的似然比来检测接收信号的多个时间相位中的短码的存在。 似然比考虑了当前的短码。

公开(公告)号：US20020176395A1

公开(公告)日：2002-11-28

申请号：US10187484

申请日：2002-07-01

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  Alexander M. Jacques

IPC: H04B007/216

CPC classification number: H04B1/71 ,  H04B1/70735 ,  H04B1/7101 ,  H04B1/7115

Abstract: A method is disclosed for receiving a transmitted signal in a communication system employing CDMA techniques wherein the transmitted signal includes a plurality of short codes, each of which is transmitted repetitively over a fixed period of time and where the received signal has CW interference in addition to the transmitted signal. The method includes using a Sequential Ratio Probability Test (SPRT) for detecting the presence of the short code in a plurality of time phases of the received signal by calculating a likelihood ratio for each phase. A likelihood ratio is a comparison of the signal's Probability Distribution Function (PDF) with a background noise PDF. The background noise PDF is calculated by combining in the RAKE the current short code with the input signal.

Abstract translation: 公开了一种用于在采用CDMA技术的通信系统中接收发送信号的方法，其中所发送的信号包括多个短码，每个短码在固定时间段内重复发送，并且其中接收信号除了具有CW干扰之外 发送信号。 该方法包括使用连续比率概率测试（SPRT）来通过计算每个相位的似然比来检测接收信号的多个时间相位中的短码的存在。 似然比是信号的概率分布函数（PDF）与背景噪声PDF的比较。 通过将RAKE中的当前短码与输入信号组合来计算背景噪声PDF。

公开(公告)号：US20030156629A1

公开(公告)日：2003-08-21

申请号：US10357869

申请日：2003-02-03

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04B001/707

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: The present invention is a communication system, including a receiver and method for receiving one of a plurality of channels in a communication signal. An adaptive matched filter produces a filtered signal by using a weighting signal. A rake receiver produces a filter weighting signal using a pseudo-noise signal generator. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor receives the despread channel signal of the selected channel and produces a correction signal. A phase-locked loop utilizes at least the despread pilot signal and produces a phase correction signal which is applied to produce phase-corrected channel signals.

Abstract translation: 本发明是一种通信系统，包括用于在通信信号中接收多个信道中的一个的接收机和方法。 自适应匹配滤波器通过使用加权信号产生滤波信号。 瑞克接收机使用伪噪声信号发生器产生滤波器加权信号。 信道去扩展器使用所生成的伪噪声信号来对经滤波的信号进行解扩，以产生所选信道的解扩频道信号。 导频信道解扩器使用伪噪声信号发生器对经滤波的信号进行解扩，以产生导频信道的解扩导频信号。 硬决策处理器接收所选信道的解扩频道信号并产生校正信号。 锁相环至少使用解扩导频信号并产生相位校正信号，该信号被施加以产生相位校正的信道信号。

公开(公告)号：US20020181433A1

公开(公告)日：2002-12-05

申请号：US10188279

申请日：2002-07-01

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  Alexander M. Jacques

IPC: H04B007/216

CPC classification number: H04B1/71 ,  H04B1/70735 ,  H04B1/7101 ,  H04B1/7115

Abstract: A system employing CDMA techniques for receiving a transmitted signal wherein the transmitted signal includes a plurality of short codes, each of which is transmitted repetitively over a fixed period of time and where the received signal has CW interference in addition to the transmitted signal. The system detects the presence of the short code in a plurality of time phases of the received signal by calculating a likelihood ratio for each phase. The likelihood ratio takes into account the current short code.

Abstract translation: 一种采用CDMA技术的系统，用于接收发送信号，其中所发送的信号包括多个短码，每个短码在固定的时间周期内被重复发送，并且其中所接收的信号除了所发送的信号之外还具有CW干扰。 该系统通过计算每个相位的似然比来检测接收信号的多个时间相位中的短码的存在。 似然比考虑了当前的短码。

公开(公告)号：US20020067760A1

公开(公告)日：2002-06-06

申请号：US10043850

申请日：2002-01-11

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: The present invention is a user equipment for carrier offset recovery during reception of a communication signal over an air interface using a plurality of channels in a pilot signal. The user equipment comprises an adaptive match filter for producing a filtered signal using a weighting signal, a rake receiver for producing a filter weighting signal, and a means for defining the filter weighting signal with a correction signal. A channel despreader is also included in the user equipment for despreading the filtered signal using a pseudo-noise signal for a selected channel to produce a despread channel signal of the selected channel. A pilot channel despreader is coupled to the adaptive match filter output for despreading the filter signal using a pseudo-noise signal generated for the pilot channel, producing a despread pilot signal of the pilot channel. A hard decision processor, associated with a complex conjugate processor, is also included in the user equipment for producing the correction signal. A phase lock loop, which uses the despread pilot signal, produces a phase correction signal, which is applied to produce phase corrected channel signals.

Abstract translation: 本发明是一种在导频信号中使用多个信道通过空中接口在通信信号接收期间进行载波偏移恢复的用户设备。 用户设备包括用于使用加权信号产生滤波信号的自适应匹配滤波器，用于产生滤波器加权信号的瑞克接收机以及用校正信号定义滤波器加权信号的装置。 在用户设备中还包括一个信道去扩频器，用于使用所选信道的伪噪声信号对已滤波的信号进行解扩，以产生所选信道的解扩信道信号。 导频信道解扩器耦合到自适应匹配滤波器输出端，用于使用为导频信道生成的伪噪声信号对滤波器信号进行解扩，产生导频信道的解扩导频信号。 与复合共轭处理器相关联的硬决策处理器也包括在用于产生校正信号的用户设备中。 使用解扩导频信号的锁相环产生相位校正信号，其被施加以产生相位校正的信道信号。

公开(公告)号：US20020039382A1

公开(公告)日：2002-04-04

申请号：US10008411

申请日：2001-11-13

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: A digital spread spectrum communication system employing pilot-aided coherent multipath demodulation effects a substantial reduction in global-pilot and assigned-pilot overheads. The system and method uses a QPSK-modulated data signal whereby the modulated data is removed and the recovered carrier is used for channel amplitude and phase estimation. The resulting signal has no data modulation and is used as a pseudo-pilot signal. In conjunction with the pseudo-pilot signal, a multiple-input phase-locked loop is employed further eliminating errors due to carrier-offset by using a plurality of pseudo-pilot signals. A pilot signal is required to resolve absolute phase ambiguity, but at a greatly reduced magnitude.

公开(公告)号：US20040233864A1

公开(公告)日：2004-11-25

申请号：US10860848

申请日：2004-06-04

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/71 ,  H04B1/70735 ,  H04B1/7101 ,  H04B1/7115

Abstract: A receiver employing CDMA techniques estimates background noise based on a periodically updated code. The transmitted signal includes a periodically updated code of a predetermined type and wherein the received signal has CW interference in addition to the transmitted signal. The decision circuit determines if a value representing the likelihood of detection of the code exceeds a predetermined threshold. In the case of a pilot signal not being detected within a predetermined time period which corresponds to code update period, the background noise estimator obtains a new background estimation.

Abstract translation: 采用CDMA技术的接收机基于周期性更新的码来估计背景噪声。 所发送的信号包括预定类型的周期性更新的代码，并且除了发送的信号之外，所接收的信号具有CW干扰。 判定电路确定表示代码的检测可能性的值是否超过预定阈值。 在对应于代码更新周期的预定时间段内没有检测到导频信号的情况下，背景噪声估计器获得新的背景估计。

公开(公告)号：US20040156424A1

公开(公告)日：2004-08-12

申请号：US10764763

申请日：2004-01-26

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04B001/707

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: The present invention is a user equipment (UE), including a receiver and method for receiving one of a plurality of channels in a communication signal. An adaptive matched filter produces a filtered signal by using a weighting signal. A rake receiver produces a filter weighting signal using a pseudo-noise signal generator. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor receives the despread channel signal of the selected channel and produces a correction signal. A phase-locked loop utilizes at least the despread pilot signal and produces a phase correction signal which is applied to produce phase-corrected channel signals.

Abstract translation: 本发明是一种用户设备（UE），其包括用于在通信信号中接收多个信道中的一个的接收机和方法。 自适应匹配滤波器通过使用加权信号产生滤波信号。 瑞克接收机使用伪噪声信号发生器产生滤波器加权信号。 信道去扩展器使用所生成的伪噪声信号来对经滤波的信号进行解扩，以产生所选信道的解扩频道信号。 导频信道解扩器使用伪噪声信号发生器对经滤波的信号进行解扩，以产生导频信道的解扩导频信号。 硬决策处理器接收所选信道的解扩频道信号并产生校正信号。 锁相环至少使用解扩导频信号并产生相位校正信号，该信号被施加以产生相位校正的信道信号。

公开(公告)号：US20020163903A1

公开(公告)日：2002-11-07

申请号：US10187693

申请日：2002-07-01

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  Alexander M. Jacques

IPC: H04B007/216

CPC classification number: H04B1/71 ,  H04B1/70735 ,  H04B1/7101 ,  H04B1/7115

Abstract: A base station for receiving a transmitted signal in a communication system employing CDMA techniques wherein the transmitted signal includes a plurality of short codes, each of which is transmitted repetitively over a fixed period of time and where the received signal has CW interference in addition to the transmitted signal. The base station detects the presence of the short code in a plurality of time phases of the received signal by calculating a likelihood ratio for each phase. The likelihood ratio takes into account the current short code.

Abstract translation: 一种用于在采用CDMA技术的通信系统中接收发送信号的基站，其中所发送的信号包括多个短码，每个短码在固定时间段内重复发送，并且其中接收信号除了 传输信号。 基站通过计算各相的似然比来检测接收信号的多个时间相位中的短码的存在。 似然比考虑了当前的短码。

公开(公告)号：US20020097787A1

公开(公告)日：2002-07-25

申请号：US10113186

申请日：2002-04-01

Applicant: InterDigital Technology Corporation

Inventor： Fatih M. Ozluturk ,  David K. Mesecher ,  Alexander M. Jacques

IPC: H04K001/00

CPC classification number: H04B1/7085 ,  H04B1/30 ,  H04B1/707 ,  H04B1/70755 ,  H04B1/7093 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L27/0014 ,  H04L2027/0067

Abstract: The present invention is a user equipment (UE), including a receiver and method for receiving one of a plurality of channels in a communication signal. An adaptive matched filter produces a filtered signal by using a weighting signal. A rake receiver produces a filter weighting signal using a pseudo-noise signal generator. A channel despreader despreads the filtered signal using the pseudo-noise signal generated to produce a despread channel signal of the selected channel. A pilot channel despreader despreads the filtered signal using a pseudo-noise signal generator to produce a despread pilot signal of the pilot channel. A hard decision processor receives the despread channel signal of the selected channel and produces a correction signal. A phase-locked loop utilizes at least the despread pilot signal and produces a phase correction signal which is applied to produce phase-corrected channel signals.