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39 条记录 (耗时 0.023 秒)

    Dynamic range extension system and method
    31.
    发明授权
    Dynamic range extension system and method 有权
    动态范围扩展系统和方法

    公开(公告)号：US07123894B2

    公开(公告)日：2006-10-17

    申请号：US10319622

    申请日：2002-12-16

    申请人： Clifford Hessel ,  Christopher D. Mackey

    发明人： Clifford Hessel ,  Christopher D. Mackey

    IPC分类号： H04B1/10

    CPC分类号： H04B1/109

    摘要： A digital radio frequency receiver capable of receiving RF signals at a plurality of signal strengths thereby extending the dynamic range of the receiver without introducing a control loop while allowing a stable gain control algorithm to be implemented in software is described. Various embodiments of a digital radio receiver process a range of signals outside normal analog to digital converter capabilities and bypass the delays resulting from gain control loops.

    摘要翻译： 一种能够以多个信号强度接收RF信号的数字射频接收机，从而在不引入控制环路的同时扩展接收机的动态范围，同时允许以软件实现稳定的增益控制算法。 数字无线电接收机的各种实施例处理超出正常模数转换器能力的一系列信号，并且绕过由增益控制环产生的延迟。

    SPECIFICATION OF A FREQUENCY AGILE DYNAMIC SPECTRUM ACCESS TDMA METHOD
    34.
    发明申请
    SPECIFICATION OF A FREQUENCY AGILE DYNAMIC SPECTRUM ACCESS TDMA METHOD 有权
    频率动态频谱访问TDMA方法的规范

    公开(公告)号：US20130148626A1

    公开(公告)日：2013-06-13

    申请号：US13313682

    申请日：2011-12-07

    申请人： Nick A. Van Stralen ,  Clifford Hessel

    发明人： Nick A. Van Stralen ,  Clifford Hessel

    IPC分类号： H04W72/04 ,  H04B1/713

    CPC分类号： H04W16/14 ,  H04B1/7143 ,  H04B2001/7154 ,  H04W84/18

    摘要： Dynamic spectral assignment in an ad hoc network of wireless network nodes (200) includes determining (306) a set of allowed frequencies that can be used by the ad hoc network and a corresponding index value for each of the allowed frequencies. An allowed list is created (308) and comprised of the index values (312) arranged in a deterministic order. A pointer (604) into the allowed list (600) is determined for each one of a total of Nhop frequency hops of a hopping sequence. Each pointer specifies one of the allowed frequencies (601) to be used for a corresponding one of the frequency hops. A wireless frequency hopping communication session is performed among a plurality of the nodes in the ad hoc network, using a frequency for each hop of the hopping sequence as specified by the pointers (604).

    摘要翻译： 无线网络节点（200）的自组织网络中的动态频谱分配包括确定（306）可以由自组织网络使用的一组允许频率和每个允许频率的相应索引值。 创建允许的列表（308）并且包括以确定性顺序排列的索引值（312）。 针对跳频序列的总共Nhop跳频中的每一个确定进入允许列表（600）的指针（604）。 每个指针指定要用于相应跳频的允许频率（601）中的一个。 使用由指针（604）指定的跳频序列的每跳的频率，在自组织网络中的多个节点之间执行无线跳频通信会话。

    Timeslot Assignment Mechanism For Satellite Communication Network
    35.
    发明申请
    Timeslot Assignment Mechanism For Satellite Communication Network 失效
    卫星通信网络时隙分配机制

    公开(公告)号：US20080089270A1

    公开(公告)日：2008-04-17

    申请号：US11550023

    申请日：2006-10-17

    申请人： James A. Norris ,  Gerald Saeva ,  Thomas Kenney ,  Kenneth Arndt ,  Kenneth Symons ,  Clifford Hessel

    发明人： James A. Norris ,  Gerald Saeva ,  Thomas Kenney ,  Kenneth Arndt ,  Kenneth Symons ,  Clifford Hessel

    IPC分类号： H04B7/204

    CPC分类号： H04B7/212

    摘要： A time division multiple access (TDMA) waveform for controlling a MIL-STD-188-183 compliant demand assignment multiple access (DAMA) satellite communication network contains a short duration and minimal data content, time-hack, that is repeatedly transmitted by a supervisory control radio, so that the time hack occurs twice within a DAMA frame, ensuring that every radio can acquire frame synchronization, irrespective of overlap in receipt of one of the time-hacks with a voice/data channel transmission by that radio. The time-hack also identifies which one among a list of different frame formats stored in the radio is to be employed.

    摘要翻译： 用于控制符合MIL-STD-188-183标准的需求分配多址（DAMA）卫星通信网络的时分多址（TDMA）波形包含由监视器重复发送的短时间和最小数据内容，最小数据内容 控制无线电，使得在DAMA帧内发生两次时间攻击，确保每个无线电可以获取帧同步，而不管该收音机通过语音/数据信道传输来收到一个时间间隔的重叠。 时间黑客还识别要使用存储在无线电中的不同帧格式的列表中的哪一个。

    Phase lock loop and method for coded waveforms
    36.
    发明申请
    Phase lock loop and method for coded waveforms 有权
    锁相环和编码波形的方法

    公开(公告)号：US20070195913A1

    公开(公告)日：2007-08-23

    申请号：US11651566

    申请日：2007-01-10

    申请人： Clifford Hessel ,  Paul Voglewede

    发明人： Clifford Hessel ,  Paul Voglewede

    IPC分类号： H03D1/00 ,  H03D3/24

    CPC分类号： H04L27/0014 ,  H04L2027/0024 ,  H04L2027/0055 ,  H04L2027/0077

    摘要： A novel system and method is disclosed for maintaining synchronization in a communication system in which a communication signal comprising a carrier and a data signal is sent from a transmitter to a receiver which includes a phase lock loop. The receiver compares the output of a Viterbi decoder with the output of a quick decision circuit. The Viterbi decoder, which incorporates traceback, determines the minimum aggregate Euclidean distance for multiple symbols. The quick decision circuit determines the minimum Euclidean distance for a single symbol without decoding the symbol. A delay circuit is placed in series with the quick decision circuit to compensate for the traceback delay in the Viterbi decoder. If the difference in the output signals of the Viterbi decoder and the quick decision circuit is greater than a predetermined threshold, the phase error signal in the phase lock loop is prevented from updating the phase lock loop filter. A synchronization loss detector may also be used to prevent the phase error signal from updating the phase lock loop filter if synchronization loss is detected. Additionally, the output signal from the Viterbi decoder is used to extract the carrier from the received communication signal by use of a lookup table to generate phase angle information as a function of the Viterbi decoder output signal. The phase angle information is combined with the Viterbi decoder output signal to reconstitute the data signal in the communication signal. The reconstituted data signal is combined with the communication signal, which has been delayed to compensate for the traceback delay in the Viterbi decoder, in order to extract the carrier.

    摘要翻译： 公开了一种新颖的系统和方法，用于在包括载波和数据信号的通信信号从发射机发送到包括锁相环的接收机的通信系统中保持同步。 接收机将维特比解码器的输出与快速判定电路的输出进行比较。 包含追溯的维特比解码器确定多个符号的最小聚合欧几里德距离。 快速判决电路确定单个符号的最小欧几里德距离，而不对码元进行解码。 延迟电路与快速判定电路串联放置以补偿维特比解码器中的回溯延迟。 如果维特比解码器和快速判定电路的输出信号的差大于预定阈值，则防止锁相环中的相位误差信号更新锁相环滤波器。 如果检测到同步丢失，则同步丢失检测器也可用于防止相位误差信号更新锁相环滤波器。 此外，来自维特比解码器的输出信号用于通过使用查找表从接收到的通信信号中提取载波，以产生作为维特比解码器输出信号的函数的相位角信息。 相位角信息与维特比解码器输出信号组合，以重构通信信号中的数据信号。 重构的数据信号与已被延迟以补偿维特比解码器中的回溯延迟的通信信号组合，以便提取载波。

    Reduced state fir filter
    39.
    发明授权
    Reduced state fir filter 失效
    减少状态fir过滤器

    公开(公告)号：US5369606A

    公开(公告)日：1994-11-29

    申请号：US944247

    申请日：1992-09-14

    申请人： Clifford Hessel

    发明人： Clifford Hessel

    IPC分类号： H03H17/02 ,  H03H17/06 ,  G06F15/31

    CPC分类号： H03H17/0607 ,  H03H17/0226 ,  H03H17/0621

    摘要： A method and apparatus for increasing the throughput of a finite impulse response (FIR) digital filter with particular applicability to systems in which the input signal sample values are constrained relative to the output signal. The method and apparatus include relatively constrained input data and positional information for identifying the location of the precomputed values of the state of the filter. A lookup table stores all the states of the filter (i.e., the sums of the products of signal sample values times filter weighting coefficients).

    摘要翻译： 一种用于增加有限脉冲响应（FIR）数字滤波器的吞吐量的方法和装置，其特别适用于输入信号采样值相对于输出信号被约束的系统。 该方法和装置包括相对约束的输入数据和用于识别滤波器状态的预计算值的位置的位置信息。 查找表存储滤波器的所有状态（即，信号采样值的乘积的和乘以滤波器加权系数）。