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1. 发明授权

US06999446B2 Adaptive, multi-rate waveform and frame structure for a synchronous, DS-CDMA system 失效
公开(公告)号：US06999446B2
公开(公告)日：2006-02-14
申请号：US10039514
申请日：2001-10-26
申请人： Eric K. Hall , Thomas R. Giallorenzi , Richard B. Ertel , Lee A. Butterfield , Dan M. Griffin , Philip L. Stephenson
发明人： Eric K. Hall , Thomas R. Giallorenzi , Richard B. Ertel , Lee A. Butterfield , Dan M. Griffin , Philip L. Stephenson
IPC分类号： H04J3/24
CPC分类号： H04W16/12 , H01Q1/246 , H01Q21/205 , H04B1/707 , H04B2201/70701 , H04B2201/70703 , H04B2201/709709 , H04J13/0074 , H04L1/0003 , H04L1/0009 , H04W16/02
摘要： A method is disclosed for operating a wireless communications system, such as a DS-CDMA communications system, by transmitting a waveform that includes a plurality of repeating frames each having x header training base symbols in a header training symbol field (TH) and y tail training base symbols in a tail training symbol field (TT). The frame is received and functions as one of a plurality of different types of frames depending on the content of at least TT. In the preferred embodiment the frame functions as one of a normal traffic frame, a termination frame, or a legacy frame providing backwards compatibility with another waveform. A given one of the frames includes four equal-size data fields separated by three equal-sized control fields, the header training symbol field (TH) and the tail training symbol field (TT).

2. 发明授权

US5963549A Fixed wireless loop system having baseband combiner predistortion summing table 失效
标题翻译：具有基带组合预失真求和表的固定无线环路系统
公开(公告)号：US5963549A
公开(公告)日：1999-10-05
申请号：US988050
申请日：1997-12-10
申请人： Steven B Perkins , L Andrew Gibson, Jr. , Ronald B Arthur , Lee A Butterfield
发明人： Steven B Perkins , L Andrew Gibson, Jr. , Ronald B Arthur , Lee A Butterfield
IPC分类号： H03H7/30 , H04B1/38 , H04B1/707 , H04J1/02 , H04J11/00 , H04J13/00
CPC分类号： H04B1/707 , H04J13/00
摘要： Disclosed is a method for generating I/Q waveforms for transmission over a CDMA radio channel. The method includes steps of (a) summing, for each of a plurality N of channels, the state of I bits to form an Isum value having a sign bit, the state of Q bits to form a Qsum value having a sign bit, and a total number of active channels to form a channel sum value; (b) applying the Isum value and sign bit, the Qsum value and sign bit, and the channel sum value to an input of a multiplexer; and (c) time multiplexing the inputs to generate first and second sets of output bits. The first set of output bits includes a subset of the Isum value bits, a subset of the Qsum value bits, the I sign bit, and the channel sum value bits. The second set of output bits includes the subset of the Isum value bits, the subset of the Qsum value bits, the Q sign bit, and the channel sum value bits. A next step of the method sequentially applies the first and second sets of output bits to a lookup table memory device for sequentially outputting an I value and a Q value for application to a digital to analog converter for generating I/Q waveforms that are predetermined to reduce transmission power and distortion. In the preferred embodiment of this invention the lookup table memory uses the LSB of the channel sum value as the LSB of the I value and the LSB of the Q value.
摘要翻译：公开了一种用于产生用于通过CDMA无线电信道进行传输的I / Q波形的方法。该方法包括以下步骤：（a）对于多个N个信道中的每一个，对I比特的状态求和以形成具有符号位的Isum值，Q位的状态以形成具有符号位的Qsum值;以及总数形成一个通道总和值的活动通道; （b）将Isum值和符号位，Qsum值和符号位以及通道和值应用于多路复用器的输入; 和（c）时间复用输入以产生第一和第二组输出位。第一组输出位包括Isum值位的子集，Qsum值位的子集，I符号位和通道和值位。第二组输出位包括Isum值位的子集，Qsum值位的子集，Q符号位和通道和值位。该方法的下一步骤将第一和第二组输出比特顺序地应用到查找表存储器装置，用于顺序地输出I值和Q值以供应用于数模转换器，用于产生预定为降低传输功率和失真。在本发明的优选实施例中，查找表存储器使用信道和值的LSB作为I值的LSB和Q值的LSB。

3. 发明授权

US5917852A Data scrambling system and method and communications system incorporating same 失效
标题翻译：数据加扰系统及其相结合的方法和通信系统
公开(公告)号：US5917852A
公开(公告)日：1999-06-29
申请号：US873538
申请日：1997-06-11
申请人： Lee A Butterfield , Thomas R Giallorenzi , L Andrew Gibson, Jr. , Dan M Griffin , Johnny M Harris , Steven B Perkins , R William Steagall
发明人： Lee A Butterfield , Thomas R Giallorenzi , L Andrew Gibson, Jr. , Dan M Griffin , Johnny M Harris , Steven B Perkins , R William Steagall
IPC分类号： G09C1/00 , H04B1/707 , H04L9/20 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/707
摘要： Users or subscribers of a multi-user communications system, such as a spread spectrum communications system, provide signals to the central station or base unit of that system, and receive signals therefrom. Avoidance of interference among those users' signals is needed to ensure proper operation of the system. To do so, the data of each user is individually scrambled to randomize the data that different users are transmitting, in order to improve tracking performance at a receiver. The data of each user is scrambled independently, in a manner unique to that user in the system, in order to improve tracking performance and detection performance of a receiver. This scrambling makes the multi-user interference zero mean, and makes it possible to integrate out or average out the multi-user interference. The pattern or sequence used for this scrambling, and the pattern or sequence used for spreading here, are preferably identical except in frequency.
摘要翻译：诸如扩频通信系统的多用户通信系统的用户或用户向该系统的中心站或基站提供信号，并从其接收信号。需要避免用户信号之间的干扰，以确保系统的正常运行。为了这样做，每个用户的数据被单独加扰以随机化不同用户正在发送的数据，以便提高接收机的跟踪性能。为了提高接收机的跟踪性能和检测性能，每个用户的数据以系统中该用户唯一的方式独立地加扰。这种扰乱使得多用户干扰为零是平均的，并且使得可以整合或平衡多用户干扰。用于该扰频的模式或序列以及用于在此扩展的模式或序列优选地在频率以外是相同的。

4. 发明授权

US07190683B2 Two-dimensional channel bonding in a hybrid CDMA/FDMA fixed wireless access system to provide finely variable rate channels 失效
标题翻译：混合CDMA / FDMA固定无线接入系统中的二维信道绑定，以提供精细可变速率信道
公开(公告)号：US07190683B2
公开(公告)日：2007-03-13
申请号：US09829360
申请日：2001-04-09
申请人： Thomas R. Giallorenzi , Eric K. Hall , Richard B. Ertel , Philip L. Stephenson , Dan M. Griffin , Lee A. Butterfield
发明人： Thomas R. Giallorenzi , Eric K. Hall , Richard B. Ertel , Philip L. Stephenson , Dan M. Griffin , Lee A. Butterfield
IPC分类号： H04B7/216 , H04B7/208 , H04J13/00 , H04J1/00 , H04L27/00
CPC分类号： H04B7/2634 , H04B7/2621
摘要： A communications system employs the use of both synchronous CDMA and FDMA to provide a variable bandwidth waveform with multiple bonded transmitters and receivers that are agile in both frequency and PN code to permit a variable bandwidth and variable rate multiple access system. In a first aspect the teachings provide the use of both CDMA and FDMA together to enable an improved concentration efficiency by making a larger pool of bandwidth available to each user. In a second aspect these teachings enable channel bonding across both code space and frequency space, thus making the system capable of operating within a variable (not necessarily contiguous) bandwidth and at a finely variable rate.
摘要翻译：通信系统采用同步CDMA和FDMA两者来提供具有灵活的频率和PN码的多个绑定发射机和接收机的可变带宽波形，以允许可变带宽和可变速率多址接入系统。在第一方面，该教导提供了CDMA和FDMA两者的使用，以通过使更大的带宽池可用于每个用户来实现改进的集中效率。在第二方面，这些教导使得能够跨代码空间和频率空间进行通道绑定，从而使系统能够在可变（不一定是连续的）带宽内以可变速率运行。

5. 发明授权

US6091760A Non-recursively generated orthogonal PN codes for variable rate CDMA 有权
标题翻译：用于可变速率CDMA的非递归生成的正交PN码
公开(公告)号：US6091760A
公开(公告)日：2000-07-18
申请号：US329473
申请日：1999-06-10
申请人： Thomas R Giallorenzi , Samuel C Kingston , Lee A Butterfield , William T Ralston , Leon L Nieczyporowicz , Alan E Lundquist
发明人： Thomas R Giallorenzi , Samuel C Kingston , Lee A Butterfield , William T Ralston , Leon L Nieczyporowicz , Alan E Lundquist
IPC分类号： H04B7/26 , H04J11/00 , H04J13/00 , H04Q7/38 , H04B7/216
CPC分类号： H04J13/10 , H04J13/0022 , H04J13/16
摘要： A method and apparatus for constructing a series of PN code sets that can be used for multirate synchronous and quasi-synchronous CDMA systems. The construction technique produces PN codes that are balanced, and that furthermore do not require any synchronization of neighboring base stations. The method is a non-recursive method that uses a permuted orthogonal matrix to modulate permuted orthogonal matrices to create PN codes that support multirate operation. Furthermore, the codes constructed using the method have very good spectral properties (if chosen properly) when the code length, n, is reasonably large.
摘要翻译：一种用于构建可用于多速率同步和准同步CDMA系统的一系列PN码集的方法和装置。构造技术产生平衡的PN码，而且不需要相邻基站的任何同步。该方法是一种非递归方法，其使用置换的正交矩阵来调制置换的正交矩阵以创建支持多速率操作的PN码。此外，当代码长度n相当大时，使用该方法构造的代码具有非常好的光谱性质（如果选择正确的话）。

6. 发明授权

US5966373A Waveform and frame structure for a fixed wireless loop synchronous CDMA communications system 失效
标题翻译：固定无线环路同步CDMA通信系统的波形和帧结构
公开(公告)号：US5966373A
公开(公告)日：1999-10-12
申请号：US988026
申请日：1997-12-10
申请人： Philip L Stephenson , Thomas R Giallorenzi , Johnny M Harris , Lee A Butterfield , Michael J Hurst , Dan M. Griffin , Rolf K. Thompson
发明人： Philip L Stephenson , Thomas R Giallorenzi , Johnny M Harris , Lee A Butterfield , Michael J Hurst , Dan M. Griffin , Rolf K. Thompson
IPC分类号： H04L1/00 , G06F11/10 , H04B20060101 , H04B1/707 , H04B7/216 , H04B7/26 , H04B15/00 , H04J3/00 , H04J3/24 , H04K1/00 , H04L1/02 , H04L7/00
CPC分类号： H04B1/707
摘要： Disclosed is a method for transmitting information in a CDMA communication system, the method including steps of (a) multiplexing data and control information into a data stream; (b) encoding the data stream to form a stream of encoded I/Q symbol pairs; (c) inserting synchronization information into the stream of encoded I/Q symbol pairs; and (d) spreading the encoded I/Q symbol pairs and the inserted synchronization information using a same pseudonoise (pn) spreading code prior to transmission as a frame. The preferred frame structure includes an unencoded synchronization field followed by a plurality of multi-byte data fields. Individual ones of the plurality of data fields are separated by a control message field. Individual ones of the control message fields contain a single byte of a multi-byte control message frame.
摘要翻译：公开了一种在CDMA通信系统中发送信息的方法，该方法包括以下步骤：（a）将数据和控制信息复用为数据流; （b）对数据流进行编码以形成编码的I / Q符号对的流; （c）将同步信息插入编码的I / Q符号对流中; 和（d）在作为帧传输之前，使用相同的伪噪声（pn）扩展码扩展编码的I / Q符号对和所插入的同步信息。优选的帧结构包括随后是多个多字节数据字段的未编码的同步字段。多个数据字段中的单个数据字段由控制消息字段分隔。控制消息字段中的单个字节包含多字节控制消息帧的单个字节。

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