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1. 发明授权

US6061339A Fixed wireless loop system having adaptive system capacity based on estimated signal to noise ratio 失效
标题翻译：基于估计信噪比的具有自适应系统容量的固定无线环路系统
公开(公告)号：US6061339A
公开(公告)日：2000-05-09
申请号：US988074
申请日：1997-12-10
申请人： Leon L Nieczyporowicz , Thomas R Giallorenzi , Philip L Stephenson , Randal R Sylvester
发明人： Leon L Nieczyporowicz , Thomas R Giallorenzi , Philip L Stephenson , Randal R Sylvester
IPC分类号： H04B17/00 , H04B7/216 , H04Q7/00
CPC分类号： H04B17/336
摘要： A method is disclosed for operating a fixed wireless system having a radio base unit (RBU) that uses a code division multiple access (CDMA) airlink for communicating with a plurality of subscriber units (SUs). The method includes steps of (a) estimating a signal to noise ratio (SNR) of the FWS; (b) comparing the estimated SNR to a threshold SNR value; and (c) one of allowing service to another SU or not allowing service to another SU based on the result of the step of comparing. The step of estimating preferably uses a normalized SNR, and further employs the use of a null PN code detection technique. More particularly, the step of estimating determines a normalized signal to noise ratio given by Eb/No=20 log (SUT/MUT)-xdB, wherein SUT represents a single user test measurement, wherein MUT represents a multiple user test measurement, and wherein xdB is an adjustment factor. Other types of CDMA systems may also use this technique.
摘要翻译：公开了一种用于操作具有无线电基站单元（RBU）的固定无线系统的方法，其使用码分多址（CDMA）空中链路来与多个用户单元（SU）进行通信。该方法包括以下步骤：（a）估计FWS的信噪比（SNR）; （b）将估计的SNR与阈值SNR值进行比较; 以及（c）基于比较步骤的结果，允许对另一个SU的服务或不允许服务于另一个SU的一个。估计的步骤优选地使用归一化的SNR，并且还采用空PN码检测技术的使用。更具体地，估计步骤确定由Eb / No = 20log（SUT / MUT）-xdB给出的归一化信噪比，其中SUT表示单用户测试测量，其中MUT表示多用户测试测量，并且其中 xdB是一个调整因子。其他类型的CDMA系统也可以使用这种技术。

2. 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).

3. 发明授权

US6023462A Fixed wireless loop system that ranks non-assigned PN codes to reduce interference 失效
标题翻译：固定无线环路系统，排列未分配的PN码以减少干扰
公开(公告)号：US6023462A
公开(公告)日：2000-02-08
申请号：US988413
申请日：1997-12-10
申请人： Leon L Nieczyporowicz , Philip L Stephenson , Thomas R Giallorenzi , Robert W Steagall
发明人： Leon L Nieczyporowicz , Philip L Stephenson , Thomas R Giallorenzi , Robert W Steagall
IPC分类号： H04J13/16 , H04M1/725 , H04W84/14 , H04B7/216 , H04J13/02
CPC分类号： H04J13/16 , H04M1/72502 , H04W84/14
摘要： Disclosed is a method for operating a fixed wireless system (FWS) having a radio base unit (RBU) that uses a code division multiple access (CDMA) airlink for communicating with a plurality of subscriber units (SUs) within a coverage area of the RBU. The method includes establishing, from a set of pseudonoise (PN) spreading codes, a subset of PN spreading codes that are currently assigned to SUs and a subset of PN spreading codes that are currently not assigned to SUs. The method further ranks the PN spreading codes from the subset of non-assigned PN spreading codes by an amount of interference experienced by the use of each non-assigned PN spreading code, and assigns to an SU requiring a PN spreading code a PN spreading code from the set of non-assigned PN spreading codes that is ranked as having a least amount of interference. The step of ranking the non-assigned PN spreading codes is preferably performed periodically, and includes the steps of assigning, in turn, individual ones of the PN spreading codes from the set of non-assigned PN spreading codes to a correlator of the RBU, and determining an amount of noise output from the correlator resulting from the use of the PN spreading code.
摘要翻译：公开了一种用于操作具有无线电基站单元（RBU）的固定无线系统（FWS）的方法，该无线电基站单元（RBU）使用码分多址（CDMA）空中链路来与RBU的覆盖区域内的多个用户单元（SU）进行通信。该方法包括从一组伪噪声（PN）扩展码建立当前分配给SU的PN扩展码的子集和当前未分配给SU的PN扩展码的子集。该方法将PN扩展码从未分配的PN扩展码的子集排列为使用每个未分配的PN扩展码所经历的干扰量，并且分配给需要PN扩展码的PN扩频码从被排列为具有最小干扰量的未分配PN扩展码的集合。对未分配的PN扩展码进行排序的步骤优选地周期性地进行，并且包括以下步骤：将PN扩展码中的各个PN扩展码从所述一组未分配的PN扩展码分配给所述RBU的相关器，以及确定从使用PN扩展码产生的相关器输出的噪声量。

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

US07054286B2 Bandwidth allocation and data multiplexing scheme for direct sequence CDMA systems 失效
标题翻译：直接序列CDMA系统的带宽分配和数据复用方案
公开(公告)号：US07054286B2
公开(公告)日：2006-05-30
申请号：US09829092
申请日：2001-04-09
申请人： Richard B. Ertel , Eric K. Hall , Thomas R. Giallorenzi , Philip L. Stephenson , Johnny M. Harris , Edward P. Newren
发明人： Richard B. Ertel , Eric K. Hall , Thomas R. Giallorenzi , Philip L. Stephenson , Johnny M. Harris , Edward P. Newren
IPC分类号： H04Q7/00
CPC分类号： H04J13/16 , H04W72/044 , H04W72/0453 , H04W72/0466
摘要： This invention provides a highly flexible multiplexing scheme for Direct Sequence CDMA systems enabling the CDMA system to flexibly allocate CDMA channel resources between packet-switched broadcast channels and fast-circuit-switched dedicated channels in order to optimize system throughput. A method and system are provided for operating a communication system. The method has steps of: flexibly allocating CDMA channel resources between packet-switched broadcast channels and fast-circuit-switched dedicated channels in order to optimize system throughput, and employing a side channel as required to send all or a part of a total amount of data, depending on the total amount of the data. A bandwidth allocation scheme allocates a set of CDMA channels for burst packet-switched channels, and data is time division multiplexed over the set of burst CDMA channels providing a wide bandwidth data pipe for packet-switched data. Subscriber stations are equipped with multiple CDMA channel receivers tuned to the burst CDMA channels.
摘要翻译：本发明为直接序列CDMA系统提供了高度灵活的复用方案，使得CDMA系统能够在分组交换广播信道和快速电路交换专用信道之间灵活地分配CDMA信道资源，以优化系统吞吐量。提供了一种操作通信系统的方法和系统。该方法具有以下步骤：在分组交换广播信道和快速电路交换专用信道之间灵活地分配CDMA信道资源，以便优化系统吞吐量，并且根据需要采用侧信道来发送全部或部分总数数据，取决于数据的总量。带宽分配方案为突发分组交换信道分配一组CDMA信道，并且通过提供用于分组交换数据的宽带宽数据管道的突发CDMA信道集合对数据进行时分复用。用户站配备有被调谐到突发CDMA信道的多个CDMA信道接收机。

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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