专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明申请

US20020186651A1 M-ary orthogonal keying system 有权
标题翻译： M型正交键控系统
公开(公告)号：US20020186651A1
公开(公告)日：2002-12-12
申请号：US10153412
申请日：2002-05-22
发明人： D. J. Richard van Nee
IPC分类号： H04B007/216 , H04B015/00
CPC分类号： H04J13/0048 , H04J13/10 , H04L23/02 , H04L27/2602 , H04L27/2617 , H04L27/2621
摘要： A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the modified codes. For example, the modified orthogonal codes can reduce the autocorrelation level so as not to exceed one-half the length of the modified orthogonal code. In certain embodiments, an M-ary orthogonal keying (MOK) system is used which modifies orthogonal Walsh codes using a complementary code to improve the auto-correlation properties of the Walsh codes, thereby enhancing the multipath performance of the MOK system while maintaining the orthogonality and low cross-correlation characteristics of the Walsh codes.
摘要翻译：数字调制系统通过使用具有减小的自相关旁瓣的修正的正交码来提供增强的多径性能，同时保持经修改的代码的互相关性质。例如，修正的正交码可以减小自相关电平，使其不超过修正正交码长度的一半。在某些实施例中，使用M进制正交密钥（MOK）系统，其使用互补码修改正交沃尔什码，以改善沃尔什码的自相关属性，从而在保持正交性的同时增强MOK系统的多径性能和沃尔什码的低互相关特性。

62. 发明申请

US20020176511A1 High pulse-rate radio-frequency apparatus and associated methods 审中-公开
标题翻译：高脉冲率射频设备及相关方法
公开(公告)号：US20020176511A1
公开(公告)日：2002-11-28
申请号：US09811326
申请日：2001-03-16
发明人： Larry W. Fullerton , Marcus H. Pendergrass
IPC分类号： H04B015/00
CPC分类号： H04B1/71635 , H04B2001/6908
摘要： A radio-frequency (RF) apparatus includes a transmitter circuitry that transmits a plurality of pulses into a multipath propagation medium. A transmitter code-circuitry codes the plurality of pulses so as to improve the pulse rate of the transmitter circuitry.
摘要翻译：射频（RF）装置包括将多个脉冲发送到多径传播介质中的发射机电路。发射机代码电路对多个脉冲进行编码，以便改善发射机电路的脉冲速率。

63. 发明申请

US20020176485A1 Multi-cast communication system and method of estimating channel impulse responses therein 审中-公开
标题翻译：多播通信系统及其中估计信道脉冲响应的方法
公开(公告)号：US20020176485A1
公开(公告)日：2002-11-28
申请号：US09825058
申请日：2001-04-03
发明人： John E. Hudson
IPC分类号： H04K001/00 , H04B015/00 , H04L027/30
CPC分类号： H04L25/0224 , H04L1/0618 , H04L25/0212 , H04L25/025 , H04L25/03159 , H04L2025/03414
摘要： Multiple Steiner codes are transmitted as bursts (s11, S12, . . . S33, 560, 524) from multiple base stations (182, 184, 186) having one or more transmit elements (174, 176, 178, 180), with successive bursts providing an extended training sequence for use in channel estimation at an addressed unit (172), such as a mobile handset. Accurate channel estimation is possible through the use of Wiener frequency domain MMSE deconvolution (518) combined with frequency domain spatial decoupling matrices, with quasi-orthogonal pseudo-noise sequences (502, 504, 520, 522) allocated to base stations and their antenna elements. The use of Steiner codes to supplement Wiener frequency domain MMSE deconvolution and frequency domain spatial decoupling results in the possibility of allocating only a single training sequence to each base station provided that the training sequence is of sufficient length to encompass all multiple time-translated channel impulse responses (H).
摘要翻译：多个Steiner码从具有一个或多个发射元件（174,176,178,180）的多个基站（182,184,186）以突发（s11，S12，...，S33,560,524）的形式发送，连续突发提供用于在诸如移动手持机的寻址单元（172）的信道估计中使用的扩展训练序列。通过使用与频域空间解耦矩阵组合的维纳频域MMSE去卷积（518）和分配给基站的准正交伪噪声序列（502,504,520,522）及其天线元件，可以进行准确的信道估计。使用Steiner代码来补充维纳频域MMSE去卷积和频域空间去耦导致仅向每个基站分配单个训练序列的可能性，只要训练序列具有足够的长度以包含所有多个时间转换的信道脉冲答案（H）。

64. 发明申请

US20020159501A1 Data transmission and reception within a spread-spectrum communication system 有权
标题翻译：扩频通信系统内的数据发送和接收
公开(公告)号：US20020159501A1
公开(公告)日：2002-10-31
申请号：US09867236
申请日：2001-05-29
申请人： MOTOROLA, INC
发明人： Gregory Agami , Robert J. Corke , Daniel G. Prysby , Stefan Paun
IPC分类号： H04K001/00 , H04B015/00 , H04L027/30 , H04L009/00 , H04L017/02
CPC分类号： H04J13/10 , H04L25/03866 , H04L27/34
摘要： A long code scrambler has been provided to scramble the data bits prior to QAM mapping. Different data rates are accommodated by using different long code m-tuples sampled at the modulation symbol rate, where m equals 2, 4 or 6 for 4, 16 or 64 QAM, respectively. In order to support 1XEV-DV users employing multiple Walsh code channels, a long code 6-tuple sample is permutated, to further randomize the QAM symbols. As appropriate for the modulation order, 2, 4 or 6 bits of the permutated 6-tuple are applied to the data sequence. That is, in addition to randomizing the modulation symbols for a given code channel, each code channel will likely have unique QAM symbols at any given symbol time.
摘要翻译：已经提供了长代码扰码器来在QAM映射之前对数据比特进行加扰。通过使用以调制符号率采样的不同长码m元组分别适应不同的数据速率，其中m等于2,4或6分别为4,16或64个QAM。为了支持采用多个沃尔什码信道的1XEV-DV用户，将长码6元组样本置换，以进一步随机化QAM符号。适用于调制阶数，将排列的6元组的2,4或6位应用于数据序列。也就是说，除了随机化给定代码信道的调制符号之外，每个代码信道在任何给定的符号时间将可能具有唯一的QAM符号。

65. 发明申请

US20020154682A1 Soft handoff between cellular systems employing different encoding rates 有权
标题翻译：使用不同编码率的蜂窝系统之间的软切换
公开(公告)号：US20020154682A1
公开(公告)日：2002-10-24
申请号：US09801891
申请日：2001-03-08
申请人： MOTOROLA, INC.
发明人： Jiangnan Chen , Ron Rotstein , Yuda Luz , Louay A. Jalloul
IPC分类号： H04K001/00 , H04B015/00 , H04L027/30
CPC分类号： H04L1/0054 , H04B7/022 , H04W36/18
摘要： A receiver (200) is provided receiving signals from differing base stations (BTSA and BTSB). The signal from BTSA is encoded using a first rate convolutional encoder while the signal transmitted from BTSB is encoded using a second rate convolutional encoder. Since the multiple base station links may result in a different number of symbols being received for each bit transmitted, the symbols received for each link cannot be simply combined. Therefore, in the preferred embodiment of the present invention, the resulting symbols are passed to multiple branch metric circuits (210-211), where branch metrics (nulli) for the symbols are obtained. After the ith branch metrics for the base stations are computed, the branch metrics for each base station are passed to a combiner (212) where they are combined.
摘要翻译：提供接收机（200），接收来自不同基站（BTSA和BTSB）的信号。使用第一速率卷积编码器对来自BTSA的信号进行编码，而使用第二速率卷积编码器对从BTSB发送的信号进行编码。由于多个基站链路可能导致针对所发送的每个比特接收到不同数量的符号，因此不能简单地组合每个链路所接收的符号。因此，在本发明的优选实施例中，所得到的符号被传递到多个分支度量电路（210-211），其中获得符号的分支量度（μi）。在计算基站的第i个分支度量之后，将每个基站的分支度量传递到组合器（212），在那里组合它们。

66. 发明申请

US20020154677A1 Programmbale chaos generator and process for use thereof 有权
标题翻译：程序混沌发生器及其使用过程
公开(公告)号：US20020154677A1
公开(公告)日：2002-10-24
申请号：US10042776
申请日：2002-01-08
申请人： STMicroelectronics S.r.l.
发明人： Luigi Occhipinti , Luigi Fortuna , Alessandro Rizzo , Mattia Frasca
IPC分类号： H04B007/216 , H04L027/00 , H04L027/30 , H04B015/00 , H04B001/713 , H04B001/707 , H04B001/69 , H04K001/00
CPC分类号： H04L27/001
摘要： A chaotic signal generator includes a set of elements connected together for generating chaotic signals. The connection scheme may correspond to the circuit generally referred to as Chua's circuit, particularly when implemented as a cellular neural network. Interposed in the connection scheme is at least one switch, such as a MOS transistor. Opening and closing of the switch causes variation in the chaotic dynamics of the generated signals. A command signal applied to the switch may correspond to a modulating signal for transmission on a channel, such as a high noise channel. The modulating signal may be a binary signal, and the command signal may be a switching signal having a frequency that increases or decreases depending on the logic level of the binary signal.
摘要翻译：混沌信号发生器包括连接在一起以产生混沌信号的一组元件。连接方案可以对应于通常称为蔡氏电路的电路，特别是当被实现为细胞神经网络时。在连接方案中插入至少一个开关，例如MOS晶体管。开关的打开和关闭会导致产生的信号的混沌动力学变化。施加到开关的命令信号可以对应于用于在诸如高噪声信道的信道上传输的调制信号。调制信号可以是二进制信号，并且命令信号可以是具有根据二进制信号的逻辑电平而增加或减小的频率的开关信号。

67. 发明申请

US20020150264A1 Method for eliminating spurious signal components in an input signal of an auditory system, application of the method, and a hearing aid 审中-公开
标题翻译：用于消除听觉系统的输入信号中的杂散信号分量，该方法的应用和助听器的方法
公开(公告)号：US20020150264A1
公开(公告)日：2002-10-17
申请号：US09832587
申请日：2001-04-11
发明人： Silvia Allegro , Hans-Ueli Roeck
IPC分类号： H04B015/00
CPC分类号： G10L21/0208 , H04R2225/43
摘要： Method for eliminating spurious signal components (SS) from an input signal (ES), said method including the characterization, in a signal analysis phase (I), of the spurious signal components (SS) and of the information signal (NS) contained in the input signal (ES), and the determination or generation, in a signal processing phase (II), of the information signal (NS) or estimated information signal (NSnull) on the basis of the characterization obtained in the signal analysis phase (I), said characterization of the signal components (SS, NS) being performed under utilization at least of auditory-based features (M1 to Mj). Also specified is an application of the method per this invention, as well as a hearing aid operating by the method of this invention.
摘要翻译：一种用于从输入信号（ES）中去除寄生信号分量（SS）的方法，所述方法包括在信号分析阶段（I）中表征杂散信号分量（SS）和信息信号（NS）中包含的信息信号输入信号（ES），以及信号处理阶段（II）中的信号信号（NS）或估计信息信号（NS'）的确定或生成，基于在信号分析阶段（ I），所述信号分量（SS，NS）的表征在至少基于听觉的特征（M1至Mj）的利用下执行。还指出了根据本发明的方法的应用，以及通过本发明的方法操作的助听器。

68. 发明申请

US20020150261A1 Networked sound masking system 有权
标题翻译：网络化声屏蔽系统
公开(公告)号：US20020150261A1
公开(公告)日：2002-10-17
申请号：US09791802
申请日：2001-02-26
发明人： Klaus R. Moeller , Niklas Moeller , Mircea Rusu , Carl Derla
IPC分类号： H04R003/02 , H04B015/00
CPC分类号： G10K11/175 , G10K2210/3014 , G10K2210/30351 , G10K2210/3049 , H04K3/42 , H04K3/43 , H04K3/45 , H04K3/825 , H04K2203/12 , H04K2203/34 , H04M11/027 , H04R3/002 , H04R27/00 , H05K5/0247
摘要： A sound masking system for shaping the ambient noise level in a physical environment. The sound masking system comprises a networked and distributed system having a number of master units coupled together and to a control unit. One or more of the master units may include satellite sound masking units which function to reproduce the sound masking signal generated by the master sound masking unit. Each of the master units is addressable over the network by the control unit enabling the control unit to program the contour, spectral band, and gain characteristics of the sound masking output signal. The system may also include a remote control unit which provides the capability to tune and adjust each master sound masking unit in situ without requiring physical access through the ceiling installation.
摘要翻译：用于在物理环境中整形环境噪声水平的声音遮蔽系统。声音掩蔽系统包括具有耦合在一起的多个主单元和控制单元的网络和分布式系统。一个或多个主单元可以包括用于再现由主声音掩蔽单元生成的声音屏蔽信号的卫星声音屏蔽单元。每个主单元可由控制单元通过网络寻址，使得控制单元能够编程声屏蔽输出信号的轮廓，频谱带和增益特性。该系统还可以包括遥控单元，该遥控单元提供能够在现场调整和调整每个主声音屏蔽单元的能力，而不需要通过天花板安装进行物理访问。

69. 发明申请

US20020141487A1 Signal detection using a CDMA receiver 有权
标题翻译：使用CDMA接收机的信号检测
公开(公告)号：US20020141487A1
公开(公告)日：2002-10-03
申请号：US09791950
申请日：2001-02-22
发明人： Wayne H. Bradley
IPC分类号： H04K001/00 , H04B015/00 , H04L027/30
CPC分类号： H04B1/0003 , H04B1/406 , H04L27/0012
摘要： A code division multiple access (CDMA) receiver detects the presence of differently formatted signals (e.g., global system for mobile communications (GSM) signals) by programming a CDMA searcher co-processor, which includes a digital filter, with tap weights that correlate with a known sequence within the differently formatted signals. If the tap weights correlate to a received signal, the receiver produces an indication that a differently formatted signal is present. Once differently formatted signals are detected, specific hardware and/or software may be implemented to receive and process the differently formatted signals.
摘要翻译：码分多址（CDMA）接收机通过对包括数字滤波器的CDMA搜索器协处理器进行编程来检测不同格式的信号（例如，全球移动通信系统（GSM）信号）的存在，该搜索器协处理器具有与不同格式的信号中的已知序列。如果抽头权重与接收到的信号相关，则接收器产生指示不同格式的信号存在。一旦检测到不同格式的信号，就可以实现特定的硬件和/或软件来接收和处理不同格式的信号。

70. 发明申请

US20020136416A1 DVE system with instability detection 失效
标题翻译： DVE系统具有不稳定性检测
公开(公告)号：US20020136416A1
公开(公告)日：2002-09-26
申请号：US09790410
申请日：2001-02-21
发明人： Shawn K. Steenhagen
IPC分类号： H04B015/00
CPC分类号： G10K11/18 , H04R3/005
摘要： A digital voice enhancement, DVE, communication system includes an instability detector detecting an unstable acoustic feedback condition from a loudspeaker to a microphone by sensing a condition of the electrical signal transmitted from the microphone to the loudspeaker, and a corrective processor responsive to the instability detector to modify the electrical signal to reduce unstable acoustic feedback. The sensed condition may be magnitude, power, or, preferably, the sinusoidal characteristic of the electrical signal, namely the electrical signal becoming sinusoidal in nature.
摘要翻译：数字语音增强DVE通信系统包括：通过感测从麦克风发送到扬声器的电信号的状况，检测从扬声器到麦克风的不稳定声反馈状态的不稳定性检测器;以及响应于不稳定性检测器的校正处理器修改电信号以减少不稳定的声反馈。感测到的条件可以是电信号的大小，功率或优选正弦特性，即电信号在本质上变成正弦波。

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