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31. 发明授权

US06597726B2 Receiver including an apparatus for generating complex four-phase sequences 失效
公开(公告)号：US06597726B2
公开(公告)日：2003-07-22
申请号：US10067082
申请日：2002-02-04
申请人： Fatih M. Ozluturk
发明人： Fatih M. Ozluturk
IPC分类号： H04B169
CPC分类号： H04J13/10 , H04J13/0022 , H04J13/102 , H04J2013/0037
摘要： A receiver including an apparatus for generating complex four-phase pseudo-random code sequences which may be directly mapped to a quadrature phase shift keying (QPSK) signal constellation. The apparatus includes a shift register coupled to an accumulator, which combines the output of the shift register with a predefined value and inputs the result back into the accumulator. Certain bits are extracted form the shift register and are used to generate the code sequences.

32. 发明申请

US20030026224A1 Encoding/decoding apparatus and method in a CDMA mobile communication system 有权
标题翻译： CDMA移动通信系统中的编码/解码装置和方法
公开(公告)号：US20030026224A1
公开(公告)日：2003-02-06
申请号：US10101352
申请日：2002-03-19
申请人： SAMSUNG ELECTRONICS CO. LTD.
发明人： Jae-Yoel Kim , Ho-Kyu Choi , Jae-Sung Jang , Youn-Sun Kim
IPC分类号： H04B007/216
CPC分类号： H04L1/0068 , H04J13/0048 , H04J13/102 , H04L1/0041 , H04L1/0069 , H04L1/08
摘要： An encoding method in a mobile communication system, for receiving 4 input information bits, encoding the 4 input information bits with different Walsh codes of length 16, and outputting a coded symbol stream having 24 coded symbols using a coded symbol stream having 16 coded symbols obtained by XORing the encoded input information bits by an XOR operator. The encoding method comprises repeating the coded symbol stream having 16 coded symbols once, and thus outputting a coded symbol stream having 32 coded symbols; and puncturing 0th, 1st, 2nd, 3rd, 4th, 5th, 6th and 16th symbols from the 32 coded symbols, and thus outputting the coded symbol stream having 24 coded symbols.
摘要翻译：一种移动通信系统中的编码方法，用于接收4个输入信息比特，用长度为16的不同沃尔什码对4个输入信息比特进行编码，并且使用获得的16个编码符号的编码符号流输出具有24个编码符号的编码符号流通过XOR运算符对编码的输入信息位进行异或。编码方法包括重复具有16个编码符号的编码符号流一次，从而输出具有32个编码符号的编码符号流; 并从32个编码符号中删除第0，第1，第2，第3，第4，第5，第6和第16符号，从而输出具有24个编码符号的编码符号流。

33. 发明申请

US20020172264A1 Partly orthogonal multiple code trees 有权
标题翻译：部分正交多码树
公开(公告)号：US20020172264A1
公开(公告)日：2002-11-21
申请号：US09828340
申请日：2001-04-05
发明人： Niclas Wiberg , Gunnar Bark , Ke Wang Helmersson
IPC分类号： H04K001/00
CPC分类号： H04J13/102 , H04J13/0044 , H04L25/03866
摘要： A method, system and apparatus for spreading physical channels using partly orthogonal multiple code trees. A portion of a first code tree is used to spread the physical channels. This first code tree is a combination of a channelization code sequence and a first scrambling code sequence. A portion of a second code tree is used to spread the physical channels that are remaining and were not spread using the first code tree. This second code tree is a combination of the channelization code sequence and a second scrambling code formed by modifying the first scrambling code. The portion of the second code tree used to spread the channels is orthogonal to the portion of the first code tree used. A plurality of other code trees could be formed using scrambling codes based on the modification of the first scrambling code.
摘要翻译：一种使用部分正交多码树扩展物理信道的方法，系统和装置。第一代码树的一部分用于扩展物理通道。该第一代码树是信道化码序列和第一扰码序列的组合。第二代码树的一部分用于扩展剩余的并且不使用第一代码树传播的物理信道。该第二码树是信道化码序列和通过修改第一扰码形成的第二扰码的组合。用于扩展通道的第二代码树的部分与所使用的第一代码树的部分正交。可以使用基于第一扰码的修改的扰码来形成多个其他码树。

34. 发明申请

US20020165003A1 Synchronization signal for synchronizing base stations 有权
标题翻译：用于同步基站的同步信号
公开(公告)号：US20020165003A1
公开(公告)日：2002-11-07
申请号：US10192639
申请日：2002-07-11
申请人： MITSUBISHI DENKI KABUSHIKI KAISHA
发明人： Marian Rudolf , Bruno Jechoux
IPC分类号： H04B007/01
CPC分类号： H04B1/708 , H04B1/70754 , H04B1/7077 , H04B7/2668 , H04B7/2687 , H04B7/2693 , H04B2201/70701 , H04J13/0014 , H04J13/102 , H04J13/107 , H04L7/042
摘要： A synchronization signal used to synchronize base stations in a mobile radio telecommunication system having a first sequence followed by a second sequence, the first and second sequences being polyphase complementary sequences configured such that when the synchronization signal is correlated with a replica of the first sequence and a replica of the second sequence, and the correlation results are added exemplary synchronization results are obtained.
摘要翻译：一种同步信号，用于在移动无线电信系统中同步基站，该系统具有随后是第二序列的第一序列，第一和第二序列是多相互补序列，其被配置为使得当同步信号与第一序列的副本相关时，第二序列的副本和相关结果被添加示例性的同步结果。

35. 发明授权

US06473449B1 High-data-rate wireless local-area network 失效
标题翻译：高数据速率无线局域网
公开(公告)号：US06473449B1
公开(公告)日：2002-10-29
申请号：US09487395
申请日：2000-01-18
申请人： John H. Cafarella , Jeffrey H. Fischer
发明人： John H. Cafarella , Jeffrey H. Fischer
IPC分类号： H04L2730
CPC分类号： H04B1/711 , H04B1/707 , H04B2201/709709 , H04J13/0048 , H04J13/102 , H04W84/12
摘要： An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communications channel corrupted by multipath interference, particularly at high data rates. A preferred embodiment of the invention represents data as a sequence of Walsh-function waveforms encoded by pseudo-noise direct-sequence spread-spectrum modulation. Walsh-function-encoding of the data provides a long symbol duration, thereby allowing the spread-spectrum modulation to provide processing gain sufficient to substantially overcome multipath interference, while providing a high data rate. In another preferred embodiment, Walsh-function modulation is supplemented with various forms of phase modulation, such as coherent PSK for bi-orthogonal signalling, and DPSK between orthogonal symbols for noncoherent bi-orthogonal signalling, thereby further increasing data rate without reducing processing gain. In another preferred embodiment, Walsh-function modulation is supplemented with spectral shaping to allow increased bandwidth occupancy, thereby further increasing the processing gain without sacrificing data rate.
摘要翻译：一种用于在至少两个适合用作无线局域网的数据设备之间传送数据的装置和方法，其经由由多路径干扰（特别是在高数据速率）损坏的无线电通信信道提供鲁棒的数据通信。本发明的优选实施例将数据表示为由伪噪声直接序列扩频调制编码的沃尔什函数波形序列。数据的沃尔什函数编码提供长的符号持续时间，从而允许扩展频谱调制提供足以实质上克服多径干扰的处理增益，同时提供高数据速率。在另一个优选实施例中，沃尔什函数调制被补充有各种形式的相位调制，例如用于双正交信令的相干PSK，以及用于非相干双正交信令的正交符号之间的DPSK，从而进一步增加数据速率而不降低处理增益。在另一个优选实施例中，沃尔什函数调制用频谱整形补充以允许增加的带宽占用，从而进一步增加处理增益而不牺牲数据速率。

36. 发明申请

US20020154680A1 Method for two-level variable chip rate spreading and despreading used in CDMA system 失效
标题翻译： CDMA系统中使用的两级可变码片速率扩展和解扩的方法
公开(公告)号：US20020154680A1
公开(公告)日：2002-10-24
申请号：US10084241
申请日：2002-02-27
申请人： The Research Institute of Telecommunications Transmission
发明人： Li Hao , Pingzhi Fan
IPC分类号： H04B001/69
CPC分类号： H04J13/102 , H04B1/707 , H04B2201/70703 , H04B2201/709709 , H04J13/0048 , H04J13/0055
摘要： This invention involves a two-level variable chip rate spreading and despreading method used in CDMA systems. The total spreading gain is the product of the two level spreading factors. Orthogonal sequences, ZCZ sequences and Pseudo-Noise (PN) sequences can be employed as the first- and second-level spreading codes. By employing the two-level spreading method, the interference existing in the systems can be suppressed efficiently and the system performance can be improved significantly.
摘要翻译：本发明涉及CDMA系统中使用的两级可变码片速率扩展和解扩方法。总扩频增益是两级扩频因子的乘积。可以采用正交序列，ZCZ序列和伪噪声（PN）序列作为第一级和第二级扩展码。通过采用二级扩展方式，可以有效地抑制系统中存在的干扰，可以显着提高系统性能。

37. 发明申请

US20020097779A1 Orthogonal complex spreading method for multichannel and apparatus thereof 有权
标题翻译：用于多通道的正交复扩展方法及其装置
公开(公告)号：US20020097779A1
公开(公告)日：2002-07-25
申请号：US09767953
申请日：2001-03-27
申请人： Electronics and Telecommunications Research Center
发明人： Seung Chan Bang , Jae Ryong Shim , Ki Chul Han , Jung Im Kim , Tae Joong Kim
IPC分类号： H04K001/00 , H04B015/00 , H04L027/30
CPC分类号： H04B1/7097 , H04J13/0048 , H04J13/102 , H04J2013/0037
摘要： An orthogonal complex spreading method for a multichannel and an apparatus thereof are disclosed. The method includes the steps of complex-summing nulln1WM,n1Xn1 which is obtained by multiplying an orthogonal Hadamard sequence WM,n1 by a first data Xn1 of a n-th block and null n2WM,n2Xn2 which is obtained by multiplying an orthogonal Hadamard sequence W1,n2 by a second data Xn2 of a n-th block; complex-multiplying nulln1WM,n1Xn1nulljnulln2WM,n2Xn2 which is summed in the complex type and WM,n3nulljPWM,n4 of the complex type using a complex multiplier and outputting as an in-phase information and quadrature phase information; and summing only in-phase information outputted from a plurality of blocks and only quadrature phase information outputted therefrom and spreading the same using a spreading code.
摘要翻译：公开了一种用于多通道的正交复扩展方法及其装置。该方法包括以下步骤：通过将正交哈达玛序列WM，n1乘以第n个块的第一数据Xn1和αn2WM，n2×n2来获得的alphan1WM，n1Xn1，其通过将正交Hadamard序列W1 ，n2由第n个块的第二数据Xn2; 使用复数乘法器将复数类型和WM，n3 + jPWM，n4相加的复乘乘法器1WM，n1Xn1 + jalphan2WM，n2Xn2并且输出为同相信息和正交相位信息; 并且仅从多个块输出的同相信息和仅输出的正交相位信息相加，并使用扩展码进行扩展。

38. 发明授权

US06396804B2 High data rate CDMA wireless communication system 失效
标题翻译：高数据率CDMA无线通信系统
公开(公告)号：US06396804B2
公开(公告)日：2002-05-28
申请号：US08886604
申请日：1997-07-01
申请人： Joseph P. Odenwalder
发明人： Joseph P. Odenwalder
IPC分类号： H04J1100
CPC分类号： H04W52/60 , H04B1/707 , H04B7/264 , H04B2201/70701 , H04J13/0044 , H04J13/0048 , H04J13/0077 , H04J13/102 , H04J13/18 , H04L1/0059 , H04L1/0071 , H04W52/34 , H04W52/54
摘要： A novel and improved method and apparatus for high rate CDMA wireless communication is described. A set of individually gain adjusted subscriber channels are formed via the use of a set of orthogonal subchannel codes. The set of sub-channel codes are comprised of four Walsh codes. The pilot data and control data are combined onto one channel. The remaining two transmit channels are used for transmitting non-specified digital data including user data or signaling data, or both.
摘要翻译：描述了一种用于高速CDMA无线通信的新颖和改进的方法和装置。通过使用一组正交子信道码形成一组单独增益调整的用户信道。子信道码组由四个沃尔什码组成。导频数据和控制数据组合在一个通道上。剩余的两个发送信道用于发送包括用户数据或信令数据的非指定数字数据，或两者。

39. 发明授权

US6049538A Efficient communication system using time division multiplexing and timing adjustment control 失效
公开(公告)号：US6049538A
公开(公告)日：2000-04-11
申请号：US877285
申请日：1997-06-16
申请人： Logan Scott
发明人： Logan Scott
IPC分类号： H04B1/7093 , H04B7/26 , H04J3/06 , H04J13/00 , H04J13/10 , H04W24/00 , H04W28/04 , H04W28/06 , H04W64/00 , H04W72/04 , H04W72/12 , H04W88/02 , H04W88/08 , H04W92/10
CPC分类号： H04W56/0045 , H04B1/7093 , H04B7/2681 , H04J13/0022 , H04J13/107 , H04J3/0682 , H04W56/003 , H04J13/102 , H04J2013/0037 , H04W74/0891 , H04W88/02 , H04W88/08 , H04W92/10
摘要： A system for time division multiplexed communication over a single frequency band in which guard time overhead is reduced by active adjustment of reverse link transmission timing as a function of round trip propagation time. In one embodiment, during a first portion of a time frame, a base station issues a single burst segmented into time slots comprising data directed to each user station. After a single collective guard time, the user stations respond, one by one, in allocated time slots on the same frequency as the base station, with only minimal guard times between each reception. In order to prevent interference among the user transmissions, the base station measures the round trip propagation time for each user station and commands the user stations to advance or retard their transmission timing as necessary. To establish the initial range of a new user station, a short message is sent by the new user station during the collective guard portion (or, alternatively, during an available time slot), from which the base station calculates the propagation delay and hence the distance of the user station. Messages sent from the base station to the user stations may be interleaved so as to reduce the effects of potential noise or interference.

40. 发明授权

US5764630A Forward link carrier recovery in an OCDMA spread spectrum communication system without a pilot tone 失效
标题翻译：在没有导频音的OCDMA扩频通信系统中的前向链路载波恢复
公开(公告)号：US5764630A
公开(公告)日：1998-06-09
申请号：US621361
申请日：1996-03-25
申请人： Francis D. Natali , John Ohlson
发明人： Francis D. Natali , John Ohlson
IPC分类号： H04B1/707 , H04J11/00 , H04J13/10 , H04B7/216
CPC分类号： H04B1/707 , H04J13/102
摘要： A spread spectrum CDMA communication system in which a base station communicates with a plurality of subscriber terminals and the base signal transmitted by the base station is comprised of a set of substantially orthogonal functions which are overlaid with a pseudo-noise (PN) sequence forming a coded spreading sequence for an information signal, each orthogonal function of the set carries data for a single user in the system. Information signals are modulated onto the carrier to form a transmit signal and the coded spreading sequence on the transmit signal for broadcasting, each subscriber terminal having a receiver for coherently demodulating the base station signal. A plurality of correlators, each respectively tuned to different functions of the orthogonal signal set, are each followed by an appropriate nonlinearity for removing the data modulation. The summed output of the correlators is used to improve the estimate of carrier phase over that obtained with a single correlator.
摘要翻译：一种扩频CDMA通信系统，其中基站与多个用户终端进行通信，由基站发送的基本信号由一组基本上正交的函数组成，所述一组基本正交的函数被叠加在伪噪声（PN）序列上，形成用于信息信号的编码扩展序列，该集合的每个正交函数在系统中为单个用户携带数据。信息信号被调制到载波上以形成发射信号和编码扩频序列在发射信号上用于广播，每个用户终端具有用于相干地解调基站信号的接收机。分别调整到正交信号组的不同功能的多个相关器各自跟随用于去除数据调制的适当的非线性。相关器的总和输出用于改善载波相位超过用单个相关器获得的估计值。

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