专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明公开

EP1760902A3 A system and method for excluding narrow band noise from a communication channel 审中-公开
标题翻译：系统和方法，用于在传输信道抑制窄带干扰信号
公开(公告)号：EP1760902A3
公开(公告)日：2011-06-22
申请号：EP06018719.2
申请日：2006-09-06
申请人： Dekolink Wireless Ltd.
发明人： Hasarchi, Abraham
IPC分类号： H03H17/02 , H04B7/15
CPC分类号： H04B1/71 , H04B7/15542 , H04B7/15578
摘要： A signal filtering system and method that may be used in conjunction with a repeater or an input stage of a base-station. The system may include an analog to digital converter adapted to sample a received signal and to produce a data stream corresponding to the received signal in the time domain, a filtering block having one or more digital filter elements, wherein each of said one or more filter elements is adapted to filter one or more sets of frequency bands associated with one or more communication channel, and a controller adapted to configure said one or more digital filter elements based on parameters stored on a database and/or based on parameters received via a modem.

52. 发明授权

EP1506622B1 Multiple carrier adaptive notch filter 有权
标题翻译：自适应多载波陷波滤波器
公开(公告)号：EP1506622B1
公开(公告)日：2009-07-15
申请号：EP03736669.7
申请日：2003-05-19
申请人： ISCO International, Inc.
发明人： CORDONE, Sean , NGUYEN, Tan, D.
IPC分类号： H04B1/10
CPC分类号： H04B1/1036 , H04B1/1027 , H04B1/123 , H04B1/71
摘要： A multiple carrier adaptive notch filter (ANF) module selectively filters a received wideband communication signal To determine the presence of narrowband interference, the multiple carrier ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from a statistical combination of the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.

53. 发明公开

EP1876723A2 Burst detector 审中-公开
标题翻译：爆裂检测器
公开(公告)号：EP1876723A2
公开(公告)日：2008-01-09
申请号：EP07119183.7
申请日：2002-09-26
申请人： INTERDIGITAL TECHNOLOGY CORPORATION
发明人： Difazio, Robert A.
IPC分类号： H04B1/707 , H04L1/00
CPC分类号： H04B1/71 , H04B1/7093 , H04B1/7105
摘要： The present invention is a receiver (19) for receiving a communication signal divided into a plurality of timeslots, wherein the timeslots include a plurality of channels, including a burst detector (10) for detecting when a selected one of the plurality of channels of the communication is received. The burst detector comprises a noise estimation device for determining a scaled noise power estimate of the selected one of the timeslots, a matched filter for detecting signal power of the selected one of the timeslots and a signal power estimation device, responsive for the matched filter, for generating a signal power estimate of the selected one of the timeslots. A comparator responsive to the scaled noise power estimate the signal power estimate is also included in the burst detector for generating a burst detection signal when the signal power estimate is greater than the scaled noise power estimate, and a data estimation device, responsive to the burst detection signal, for decoding the plurality of channels.
摘要翻译：本发明是一种用于接收被分成多个时隙的通信信号的接收器（19），其中时隙包括多个信道，包括一个脉冲串检测器（10），用于检测多个时隙中的多个信道中选择的一个信道通讯已收到。脉冲串检测器包括用于确定选定的一个时隙的缩放噪声功率估计的噪声估计设备，用于检测所选时隙中的一个的信号功率的匹配滤波器以及响应于匹配滤波器的信号功率估计设备，用于产生所选时隙中的一个时隙的信号功率估计。响应于缩放噪声功率估计的比较器，信号功率估计也被包括在脉冲串检测器中以用于当信号功率估计大于缩放噪声功率估计时产生猝发检测信号，以及数据估计装置，响应于脉冲串检测信号，用于解码多个信道。

54. 发明公开

EP1760902A2 A system and method for excluding narrow band noise from a communication channel 审中-公开
标题翻译：系统和Verfahren zurUnterdrückungschmalbandigerStörsignale在einemÜbertragungskanal
公开(公告)号：EP1760902A2
公开(公告)日：2007-03-07
申请号：EP06018719.2
申请日：2006-09-06
申请人： Dekolink Wireless Ltd.
发明人： Hasarchi, Abraham
IPC分类号： H04B1/707
CPC分类号： H04B1/71 , H04B7/15542 , H04B7/15578
摘要： A signal filtering system and method that may be used in conjunction with a repeater or an input stage of a base-station. The system may include an analog to digital converter adapted to sample a received signal and to produce a data stream corresponding to the received signal in the time domain, a filtering block having one or more digital filter elements, wherein each of said one or more filter elements is adapted to filter one or more sets of frequency bands associated with one or more communication channel, and a controller adapted to configure said one or more digital filter elements based on parameters stored on a database and/or based on parameters received via a modem.
摘要翻译：可以与基站的中继器或输入级一起使用的信号滤波系统和方法。该系统可以包括适于对接收到的信号进行采样并且在时域中产生与接收信号相对应的数据流的模数转换器，具有一个或多个数字滤波器元件的滤波块，其中所述一个或多个滤波器元件适于过滤与一个或多个通信信道相关联的一组或多组频带，以及适于基于存储在数据库上的参数和/或基于经由调制解调器接收的参数来配置所述一个或多个数字滤波器元件的控制器。

55. 发明授权

EP1530832B1 METHOD AND APPARATUS FOR DETECTING JAMMING SIGNAL IN A DSSS SYSTEM USING PHASE TRANSITION COUNTING 有权
标题翻译：方法和装置DETEKTIONIEREN IN A DSSS系统中的噪声信号使用相变计数
公开(公告)号：EP1530832B1
公开(公告)日：2006-09-13
申请号：EP03765491.0
申请日：2003-07-07
申请人： SiRF Technology, Inc.
发明人： FITZRANDOLPH, David, K.
IPC分类号： H04B1/707 , H04B1/10
CPC分类号： H04K3/228 , H04B1/1036 , H04B1/71
摘要： In a wireless communication device (106) a method of detecting a narrowband jamming signal (404) includes receiving a wireless communication signal (104) and downconverting the wireless communication signal (104) to an intermediate frequency (IF) signal (525). IF signal (525) is digitized to provide a digital signal (527). Digital signal (527) is despread, demodulated and monitored for the number of phase transitions (562) occurring during a time interval (556). The method further includes comparing the number of phase transitions (562) during the time interval (556) with a threshold value (560) and determining that the wireless communication signal (104) is not the narrowband jamming signal (404) if the number of phase transitions (562) during the time interval (556) exceeds the threshold value (560), or determining that the wireless communication signal (104) is the narrowband jamming signal (404) if the number of phase transitions (562) during the time interval (556) is less than the threshold value (560).

56. 发明公开

EP1601114A2 Short code detection method 审中-公开
标题翻译： Kurzkode-Detektionsverfahren
公开(公告)号：EP1601114A2
公开(公告)日：2005-11-30
申请号：EP05016461.5
申请日：2000-09-21
申请人： INTERDIGITAL TECHNOLOGY CORPORATION
发明人： The designation of the inventor has not yet been filed
IPC分类号： H04B1/707
CPC分类号： H04B1/71 , H04B1/70735 , H04B1/7101 , H04B1/7115
摘要： The present invention relates to a base station for receiving a transmitted signal which includes at least one short code which is periodically updated; the base station comprising:

a despreader for receiving and despreading the transmitted signal to output a despread signal;
a background noise estimator for obtaining a background noise estimation using the periodically updated short code; and
a decision unit, which receives the despread signal and the background noise estimate, calculates a value representing the likelihood that a short code has been detected and compares the value with a predetermined threshold; whereby the decision unit confirms the detection of the short code if the value exceeds the predetermined threshold.
摘要翻译：本发明涉及一种用于接收发送信号的基站，该基站包括周期性更新的至少一个短码; 所述基站包括：解扩器，用于接收和解扩所发送的信号以输出解扩信号; - 背景噪声估计器，用于使用周期性更新的短码获得背景噪声估计; 以及 - 接收去扩展信号和背景噪声估计的判定单元，计算表示已经检测到短码的可能性的值，并将该值与预定阈值进行比较; 如果所述值超过所述预定阈值，则所述判定单元确认所述短码的检测。

57. 发明公开

EP1265389A2 Method of impairment mitigation in a communication system 有权
标题翻译：在einem Kommunikationssystem系统的Verfahren zur Reduzierung vonStörungen
公开(公告)号：EP1265389A2
公开(公告)日：2002-12-11
申请号：EP02253967.0
申请日：2002-06-07
申请人： Broadcom Corporation
发明人： Kolze, Thomas , Currivan, Bruce , Min, Jonathan
IPC分类号： H04L1/00
CPC分类号： H04L1/005 , H04B1/71 , H04B1/7102 , H04B1/7103 , H04B1/71055 , H04B1/71072 , H04B2201/709709 , H04L1/0009 , H04L1/0045 , H04L1/0057 , H04N21/6168
摘要： Systems and methods are disclosed for detecting temporary high level impairments, such as noise or interference, for example, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic impairments. In one embodiment, the method not only performs dynamic characterization of channel fidelity against impairments, but also uses this dynamic characterization of the channel fidelity to adapt the receiver processing and to affect an improvement in the performance of the receiver. For example, in this embodiment, the method increases the accuracy of the estimation of the transmitted information, or similarly, increases the probability of making the correct estimates of the transmitted information, even in the presence of temporary severe levels of impairment. The channel fidelity history may also be stored and catalogued for use in, for example, future optimization of the transmit waveform.
摘要翻译：公开了用于检测临时高级损伤（例如噪声或干扰）的系统和方法，例如在通信信道中，并且随后减轻动态损伤的有害影响。在一个实施例中，该方法不仅执行对损伤的信道保真度的动态表征，而且还使用信道保真度的动态表征来调整接收机处理并影响接收机的性能的改善。例如，在本实施例中，该方法提高了所发送的信息的估计的准确性，或者，即使存在临时的严重的损伤程度，也可以提高对发送的信息的正确估计的概率。信道保真度历史也可以被存储和编目，以用于例如发射波形的未来优化。

58. 发明公开

EP0945994A3 Adaptive acquisition system for spread spectrum transmissions compensating for frequency offset and noise 有权
标题翻译：与偏移频率的补偿和噪声Speizspektrumübertragungen可调记录系统
公开(公告)号：EP0945994A3
公开(公告)日：2002-01-16
申请号：EP99302064.3
申请日：1999-03-17
申请人： Sony Electronics Inc.
发明人： Chung, Sanguoon
IPC分类号： H04B1/707
CPC分类号： H04B1/70752 , H04B1/7075 , H04B1/70751 , H04B1/70755 , H04B1/70775 , H04B1/71 , H04J13/0022
摘要： An improved Pseudo Noise (PN) code acquisition apparatus and method for Code Division Multiple Access (CDMA) Direct Sequence Spread Spectrum (DSSS) systems which utilize a Fourier Transform and which operate in both additive white Gaussian noise and frequency offset environments. The signal to noise ratio (SNR) is generated and used not only to make the decision of when to stop the signal search process but also to adjust the search rate. The Fourier transform is implemented in ASIC hardware to estimate frequency offset. To further speed up its processing, the Fourier transform is performed using shift and add operations by employing canonic sign digit representation of the eigen vector of the Fourier transform. Detection probability is increased and false alarm probability is reduced significantly, especially in a frequency offset environment.

59. 发明公开

EP0987913A2 Spread spectrum cdma transmitter 失效
标题翻译： CDMA Spreizspektrumsender
公开(公告)号：EP0987913A2
公开(公告)日：2000-03-22
申请号：EP99123930.2
申请日：1991-12-03
申请人： INTERDIGITAL TECHNOLOGY CORPORATION
发明人： Schilling, Donald L
IPC分类号： H04Q7/36 , H04B7/26
CPC分类号： H04W52/343 , G01S5/0036 , G01S5/14 , G01S13/82 , H04B1/71 , H04B1/7102 , H04B7/18547 , H04B7/216 , H04B7/2628 , H04B7/2631 , H04J13/00 , H04W16/02 , H04W52/346
摘要： A spread spectrum code division multiple access (CDMA) transmitter for communicating data to a spread spectrum CDMA receiver in a same geographic region as covered by a cellular system, the cellular system communicating using a plurality of predetermined frequency bandwidths, is disclosed. The CDMA transmitter is characterized by means (151, 153, 253, 257, 171, 173, 273) for generating a spread spectrum CDMA data signal spread with a pseudo random chip code sequence, the CDMA data signal having a wide bandwidth overlaying said plurality of predetermined frequency bandwidths and means (155, 157, 159, 255, 175, 179) for transmitting said spread data signal to said CDMA receiver. A method of transmitting data between a CDMA transmitter and a receiver with a bandwidth which overlays frequency bandwidths of a cellular system is also disclosed.
摘要翻译：公开了一种扩频码分多址（CDMA）发射机，用于将数据传送到与由蜂窝系统覆盖的相同地理区域中的扩频CDMA接收机，该蜂窝系统使用多个预定频带进行通信。 CDMA发射机的特征在于用于产生用伪随机码片序列扩展的扩频CDMA数据信号的装置（151,153,253,257,171,173,273），所述CDMA数据信号具有覆盖所述多个的宽带宽以及用于将所述扩展数据信号发送到所述CDMA接收机的装置（155,157,159,255,175,179）。还公开了在CDMA发射机和接收机之间传输数据的方法，该方法具有覆盖蜂窝系统的频带宽度的带宽。

60. 发明公开

EP0945994A2 Adaptive acquisition system for spread spectrum transmissions compensating for frequency offset and noise 有权
标题翻译： Anpassbares ErfassungssystemfürSpeizspektrumübertragungenmit Kompensation von Frequenzversatz und Rauschen
公开(公告)号：EP0945994A2
公开(公告)日：1999-09-29
申请号：EP99302064.3
申请日：1999-03-17
申请人： Sony Electronics Inc.
发明人： Chung, Sanguoon
IPC分类号： H04B1/707
CPC分类号： H04B1/70752 , H04B1/7075 , H04B1/70751 , H04B1/70755 , H04B1/70775 , H04B1/71 , H04J13/0022
摘要： An improved Pseudo Noise (PN) code acquisition apparatus and method for Code Division Multiple Access (CDMA) Direct Sequence Spread Spectrum (DSSS) systems which utilize a Fourier Transform and which operate in both additive white Gaussian noise and frequency offset environments. The signal to noise ratio (SNR) is generated and used not only to make the decision of when to stop the signal search process but also to adjust the search rate. The Fourier transform is implemented in ASIC hardware to estimate frequency offset. To further speed up its processing, the Fourier transform is performed using shift and add operations by employing canonic sign digit representation of the eigen vector of the Fourier transform. Detection probability is increased and false alarm probability is reduced significantly, especially in a frequency offset environment.
摘要翻译：一种用于码分多址（CDMA）直接序列扩频（DSSS）系统的改进的伪噪声（PN）码获取装置和方法，其利用傅里叶变换并且在加性白高斯噪声和频偏环境中工作。生成信噪比（SNR），不仅用于决定何时停止信号搜索处理，还可以调整搜索速率。傅里叶变换在ASIC硬件中实现以估计频率偏移。为了进一步加速其处理，通过使用傅里叶变换的特征向量的标音符号表示，使用移位和相加操作来执行傅里叶变换。检测概率增加，误报概率明显降低，特别是在频偏环境中。

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