利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

21 条记录 (耗时 0.022 秒)

    System and method employing concatenated spreading sequences to provide data modulated spread signals having increased data rates with extended multi-path delay spread
    1.
    发明授权
    System and method employing concatenated spreading sequences to provide data modulated spread signals having increased data rates with extended multi-path delay spread 有权
    使用级联扩展序列的系统和方法提供具有扩展的多径延迟扩展的具有增加的数据速率的数据调制扩展信号

    公开(公告)号：US06674790B1

    公开(公告)日：2004-01-06

    申请号：US10053695

    申请日：2002-01-24

    申请人： Donald J. Rasmussen ,  Larry W. Koos

    发明人： Donald J. Rasmussen ,  Larry W. Koos

    IPC分类号： H04B1707

    CPC分类号： H04J13/107 ,  H04B1/7115 ,  H04B2201/709709

    摘要： A system and method for enabling a transmitter employing signal spreading techniques to increase the data rate of the transmitted modulated signal without reducing the multi-path delay spread. Specifically, the system and method use concatenated spreading sequences to provide data modulated spread signals having increased data rates with extended multi-path delay spread. The system and method therefore removes the one-to-one relationship between the repetitive spreading code length and maximum multi-path delay spread of a data modulated spread signal, to thus increase the data rate for a given multi-path delay spread while preserving the autocorrelation and cross-correlation properties of the individual spreading sequences.

    摘要翻译： 一种用于使得采用信号扩展技术的发射机能够在不减少多径延迟扩展的情况下增加发射调制信号的数据速率的系统和方法。 具体地，该系统和方法使用连接的扩展序列来提供具有扩展的多径延迟扩展的具有增加的数据速率的数据调制扩展信号。 因此，该系统和方法消除了数据调制扩展信号的重复扩展码长度和最大多径延迟扩展之间的一对一关系，从而增加给定多径延迟扩展的数据速率，同时保留 个体扩展序列的自相关和互相关性质。

    Multibit amplitude and phase modulation transceiver for LAN
    4.
    发明授权
    Multibit amplitude and phase modulation transceiver for LAN 失效
    用于LAN的多位幅度和相位调制收发器

    公开(公告)号：US5050189A

    公开(公告)日：1991-09-17

    申请号：US270739

    申请日：1988-11-14

    申请人： William M. Cox ,  Michael A. Fischer ,  Charles Lawrence ,  Peter H. Halpern ,  Larry W. Koos

    发明人： William M. Cox ,  Michael A. Fischer ,  Charles Lawrence ,  Peter H. Halpern ,  Larry W. Koos

    IPC分类号： H04L7/033 ,  H04L25/03 ,  H04L25/49

    CPC分类号： H04L25/4919 ,  H04L25/03006 ,  H04L7/0338

    摘要： A transceiver for a LAN is capable of communicating multiple bits per signal element to increase the data throughput of the LAN. The transceiver includes a transmitter which receives a multiple bit digital input value originating at a node of the LAN at which the transceiver is present. The transmitter converts the multiple bit digital input signal into a pulse-like analog signal which is amplitude and phase modulated. A receiver of a transceiver at a receiving node the transmitted analog signal converts its amplitude and phase into a corresponding multiple bit digital output value. A time-domain filter of the receiver creates a primary signal from the received analog signal. To sample the primary signal at its maximum amplitude point, a derivative of the primary signal waveform is used to establish the zero derivative point at which the primary signal attains its maximum amplitude, and to establish a fixed sampling point for subsequent signals. The sampling point is synchronized in phase with the stream of received analog signals. The residual intersymbol interference (ISI) effect of preceding signals on the LAN medium is eliminated prior to converting the primary signal to the digital value. To adjust and compensate for attenuation and amplification created by the LAN medium, the signal values are normalized.

    摘要翻译： 用于LAN的收发器能够对每个信号元件通信多个比特以增加LAN的数据吞吐量。 收发器包括发送器，其接收始发于存在收发器的LAN的节点处的多位数字输入值。 发射机将多位数字输入信号转换为脉冲状模拟信号，该模拟信号是幅度和相位调制的。 在接收节点处的收发器的接收器，传输的模拟信号将其幅度和相位转换成相应的多位数字输出值。 接收机的时域滤波器从接收的模拟信号产生主信号。 为了在其最大振幅点对主信号进行采样，使用主信号波形的导数来建立主信号达到其最大幅度的零点，并建立后续信号的固定采样点。 采样点与接收到的模拟信号的流相同步。 在将主信号转换为数字值之前，先前信号在LAN介质上的残余码间干扰（ISI）效应被消除。 为了调整和补偿由LAN介质产生的衰减和放大，信号值被归一化。

    Data network having a wireless local area network with a packet hopping wireless backbone
    5.
    发明授权
    Data network having a wireless local area network with a packet hopping wireless backbone 有权
    数据网络具有无线局域网与跳频无线骨干网

    公开(公告)号：US06925069B2

    公开(公告)日：2005-08-02

    申请号：US10126708

    申请日：2002-04-19

    申请人： William M. Koos, Jr. ,  Larry W. Koos

    发明人： William M. Koos, Jr. ,  Larry W. Koos

    IPC分类号： H04L12/66 ,  H04L12/28 ,  H04L12/56 ,  H04Q7/00

    CPC分类号： H04W88/04 ,  H04W80/00 ,  H04W84/12

    摘要： A wireless local area network (LAN) for data communications. The wireless LAN includes a packet hopping access terminal (PHAST) and a packet hopping gateway (PHG). The PHAST has a first transceiver for wirelessly communicating with a client device, and a second transceiver for wirelessly receiving data packets addressed to the client device and for wirelessly transmitting data packets received from the client device in accordance with a packet hopping protocol. The PHG has a transceiver for wirelessly receiving the data packets transmitted by the PHAST and for transmitting the data packets addressed to the client device in accordance with the packet hopping protocol, and a network interface for establishing communication with a server.

    摘要翻译： 用于数据通信的无线局域网（LAN）。 无线LAN包括跳频接入终端（PHAST）和跳频网关（PHG）。 PHAST具有用于与客户端设备进行无线通信的第一收发器和用于无线地接收寻址到客户端设备的数据分组的第二收发器，以及根据跳跳协议无线地发送从客户端设备接收的数据分组。 PHG具有用于无线地接收由PHAST发送的数据分组并根据跳频协议发送寻址到客户端设备的数据分组的收发器，以及用于建立与服务器的通信的网络接口。

    Communication scheme using non-coherent frequency detection of trellis-based coding of plural transmission frequencies per baud
    6.
    发明授权
    Communication scheme using non-coherent frequency detection of trellis-based coding of plural transmission frequencies per baud 失效
    使用非相干频率检测的每个波特率的多个传输频率的基于网格编码的通信方案

    公开(公告)号：US5926508A

    公开(公告)日：1999-07-20

    申请号：US391965

    申请日：1995-02-21

    申请人： Larry W. Koos ,  William M. Koos, Jr. ,  Peter E. Mallory

    发明人： Larry W. Koos ,  William M. Koos, Jr. ,  Peter E. Mallory

    IPC分类号： H04B7/185 ,  H04L1/00 ,  H04L27/30 ,  H04L27/28 ,  H04L5/12 ,  H04L23/02

    CPC分类号： H04L1/0059 ,  H04L1/0054 ,  H04L27/30 ,  H04B7/18528

    摘要： A reduced cost, robust data communication scheme for very small aperture terminal satellite communication systems combines non-coherent frequency detection and trellis-coded, multi-frequency modulation. The data code width is associated with the size of a multiple frequency set and the selection of a given combination of frequencies for transmission during a respective baud. One portion the data is convolutionally encoded and points to an orthogonal signal set associated with frequencies of a partitioned multiple frequency set. Another portion of the data identifies the frequency combination within the group pointed to by the one portion. The combined portions encode a multi-frequency transmission waveform. At the receiver, the multi-frequency tone sequence is detected by non-coherent frequency detection. For each baud, matched filters output a most likely set of frequencies transmitted during that baud, as soft decisions to a Viterbi decoder.

    摘要翻译： 针对非常小孔径终端卫星通信系统的成本低廉的数据通信方案，结合了非相干频率检测和网格编码的多频调制。 数据代码宽度与多频率集合的大小和给定的频率组合的选择相关联，以在相应的波特率期间进行传输。 数据的一部分进行卷积编码，并指向与分割的多频率集合的频率相关联的正交信号集。 数据的另一部分标识由该部分指向的组内的频率组合。 组合部分编码多频传输波形。 在接收机处，通过非相干频率检测来检测多频调频序列。 对于每个波特率，匹配滤波器输出在该波特率期间发送的最可能的一组频率，作为对维特比解码器的软判决。

    Communication scheme using non-coherent frequency detection of trellis-based coding of plural transmission frequencies per baud
    9.
    发明授权
    Communication scheme using non-coherent frequency detection of trellis-based coding of plural transmission frequencies per baud 失效
    使用非相干频率检测的每个波特率的多个传输频率的基于网格编码的通信方案

    公开(公告)号：US6072838A

    公开(公告)日：2000-06-06

    申请号：US287047

    申请日：1999-04-06

    申请人： Larry W. Koos ,  William M. Koos, Jr. ,  Peter E. Mallory

    发明人： Larry W. Koos ,  William M. Koos, Jr. ,  Peter E. Mallory

    IPC分类号： H04B7/185 ,  H04L1/00 ,  H04L27/30 ,  H04L27/28 ,  H04L5/12 ,  H04L23/02

    CPC分类号： H04L1/0059 ,  H04L1/0054 ,  H04L27/30 ,  H04B7/18528

    摘要： A reduced cost digital data modulation and demodulation scheme for very small aperture terminal (VSAT) satellite communication systems combines non-coherent frequency detection with trellis-coded, multi-frequency modulation. The technique is robust to phase noise and frequency uncertainty and is capable of achieving the performance of rate one-half phase shift keyed modulation. The code width of data to be transmitted bears a prescribed relationship to the size of a multiple frequency set and the selection of a given combination of frequencies within that set for transmission during a respective baud. One portion the data is convolutionally encoded and provides a pointer to one of plural groups of orthogonal signal sets associated with frequencies into which the multiple frequency set has been partitioned. Another portion of the data identifies the frequency combination within the group pointed to by the one portion. The combined portions encode a multi-frequency waveform transmitted to the receiver site. At the receiver site, the sequence of multi-frequency tones produced by the transmitter encoder is detected by non-coherent frequency detection. For each baud, the outputs of matched filters are examined to determine the most likely set of frequencies to have been transmitted during that baud. Most likely frequency combination determinations provide soft decision inputs to a Viterbi decoder.

    摘要翻译： 用于非常小孔径终端（VSAT）卫星通信系统的降低成本的数字数据调制和解调方案将非相干频率检测与网格编码的多频调制相结合。 该技术对相位噪声和频率不确定度是稳健的，并且能够实现速率半相位键控调制的性能。 要发送的数据的码宽与多频率集合的大小规定关系，并且在相应的波特率期间选择该集合内的频率的一部分以进行传输。 一部分数据进行卷积编码，并提供指向与多频组合已被分割成的频率相关联的多组正交信号组中的一组的指针。 数据的另一部分标识由该部分指向的组内的频率组合。 组合部分编码发送到接收器站点的多频波形。 在接收器站点，通过非相干频率检测来检测发射机编码器产生的多频调频序列。 对于每个波特率，检查匹配滤波器的输出以确定在该波特率期间发送的最可能的频率集合。 最可能的频率组合确定为维特比解码器提供软判决输入。

    Memory mapping unit
    10.
    发明授权
    Memory mapping unit 失效
    内存映射单元

    公开(公告)号：US4400794A

    公开(公告)日：1983-08-23

    申请号：US322118

    申请日：1981-11-17

    申请人： Larry W. Koos

    发明人： Larry W. Koos

    IPC分类号： G06F13/00 ,  G06F12/06 ,  G11C8/00 ,  G11C5/06 ,  G11C7/00

    CPC分类号： G06F12/0661

    摘要： A memory mapping unit enables different sized memory boards to be mapped in any order into any size memory address boundary in a microprocessor. Any 2.sup.K sized memory board (where N.ltoreq.K.ltoreq.M) can be mapped to any 2.sup.N address boundary. To accomplish this, a binary adder adds the 2's complement of the base address register with significant bits from the address buss. A series of logic gates are connected to the output of the binary adder and a board size mask register. The logic gates perform an "AND" operation on the output from the binary adder and the board size mask register. The outputs from the logic gates connect to a multiple input "NOR" gate. When all the inputs are logical "zero", indicating the address is on the board, a board enable command is produced which activates the memory board transceiver.

    摘要翻译： 存储器映射单元使得不同大小的存储器板可以以任何顺序映射到微处理器中的任何大小的存储器地址边界。 任何2K大小的存储器板（其中N