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    • 7. 发明授权
    • Adaptive second order threshold calibration technique for radiometric signal detection
    • 用于辐射信号检测的自适应二阶阈值校准技术
    • US08392149B1
    • 2013-03-05
    • US12877397
    • 2010-09-08
    • W. Sam SpencerCarlos J. Chavez
    • W. Sam SpencerCarlos J. Chavez
    • G06F15/00
    • G06K9/38G01S7/021
    • A apparatus configured to detect the presence of one or more unknown signals in the presence of noise and/or interference. The apparatus includes an input configured to receive an input data from a sensor, an integrator configured to integrate the power of the input data over a period of time, and a comparator configured to compare the integrated power to a threshold to determine if the input data contains at least one signal, or if the input data contains noise only. The apparatus may further include a mean estimator configured to estimate the mean of the power integrated input data over a period of time, a variance estimator configured to estimate the variance of the power integrated input data over a period of time, and a threshold calculator configured to calculate the threshold value based on the estimated mean or estimate mean and estimated variance.
    • 一种被配置为在存在噪声和/或干扰的情况下检测一个或多个未知信号的存在的装置。 该装置包括被配置为从传感器接收输入数据的输入,经配置以在一段时间内积分输入数据的功率的积分器和被配置为将积分功率与阈值进行比较以确定输入数据 包含至少一个信号,或者输入数据仅包含噪声。 该装置还可以包括被配置为在一段时间内估计功率集成输入数据的平均值的平均估计器,被配置为估计功率集成输入数据在一段时间内的方差的方差估计器,以及阈值计算器配置 基于估计的平均值或估计平均值和估计方差来计算阈值。
    • 8. 发明授权
    • Multi-dwell channel monitoring for coordinated frequency hopped systems
    • 协调跳频系统的多停留信道监测
    • US08077597B1
    • 2011-12-13
    • US12074800
    • 2008-03-06
    • Robert J. FrankRichard L. RobertsonCarlos J. ChavezMark W. Barglof
    • Robert J. FrankRichard L. RobertsonCarlos J. ChavezMark W. Barglof
    • H04J11/00H04B7/216
    • H04B1/715H04B2001/7154
    • Spectral environment estimation systems and methods are provided for use with frequency hopped communications systems. A spectral sensor is configured to receive input signals from a signal aperture and to perform spectral estimations on the input signals to generate a frequency domain spectral estimate. Ordinary spectral characterization circuitry is configured to receive the frequency domain spectral estimate as an input and to produce an ordinary frequency domain spectral environment estimate based on the spectral estimate. Frequency hopping translation circuitry is configured to receive the frequency domain spectral estimate from the spectral sensor as an input and to produce a de-hopped channel domain spectral estimate based on the frequency domain spectral estimate. De-hopped spectral characterization circuitry is configured to receive the de-hopped channel domain spectral estimate as an input and to produce a de-hopped channel domain spectral environment estimate based on the de-hopped spectral estimate. Spectral environment integration circuitry is configured to generate an integrated spectral environment estimate, based on the ordinary frequency domain spectral environment estimate and the de-hopped channel domain spectral environment estimate, for use by networked communications systems or devices in controlling frequency hopped communications.
    • 光谱环境估计系统和方法被提供用于跳频通信系统。 光谱传感器被配置为从信号孔径接收输入信号并且对输入信号执行频谱估计以产生频域频谱估计。 普通频谱表征电路被配置为接收频域频谱估计作为输入,并且基于频谱估计产生普通频域频谱环境估计。 跳频转换电路被配置为从频谱传感器接收频域频谱估计作为输入,并且基于频域频谱估计产生去跳频信道域频谱估计。 去跳频谱表征电路被配置为接收去跳频信道域频谱估计作为输入,并且基于去跳频谱估计产生去跳频信道域频谱环境估计。 频谱环境集成电路被配置为基于普通频域频谱环境估计和去跳频信道域频谱环境估计来生成综合频谱环境估计,供网络通信系统或设备在控制跳频通信中使用。
    • 9. 发明授权
    • Dynamic socket waveform
    • 动态套接字波形
    • US07733839B1
    • 2010-06-08
    • US11338233
    • 2006-01-24
    • Robert J. FrankKarl F. HoechGunther B. FrankCarlos J. Chavez
    • Robert J. FrankKarl F. HoechGunther B. FrankCarlos J. Chavez
    • H04J1/00
    • H04L5/0005H04L5/0037H04L5/008H04W84/18
    • A system capable of operation with dynamic sockets includes a plurality of communications devices. Each of the plurality of communications devices includes high band channel radio resources capable of communications at 900-2800 MHz and socket radio resources capable of communications at 30-1000 MHz. The high band channel radio resources and the socket radio resources are significantly separated in frequency so that the high band channel radio resources and the socket radio resources are suitable for concurrent operation with no interference and minimal isolation, co-site problems to solve in each of the plurality of communications devices. The plurality of communications devices are connected to a unifying mesh network by the high band channel radio resources. The unifying mesh network is suitable for allowing the plurality of communications devices to communicate with one another. When data needs to be transferred among a group of communications devices, a dynamic socket connection is negotiated on the unifying mesh network and is then formed with the socket radio resources. The dynamic socket formation is suitable for allowing the unifying mesh network to offload continuous receiver-directed or multicast traffic from the unifying mesh network channel and to free up public ad hoc communications bandwidth of the unifying mesh network.
    • 能够与动态插座一起操作的系统包括多个通信设备。 多个通信设备中的每一个包括能够在900-2800MHz通信的高频带信道无线电资源和能够以30-1000MHz通信的插座无线电资源。 高频信道无线电资源和套接字无线电资源在频率上显着分开,使得高频带信道无线电资源和套接字无线电资源适合并行操作,无干扰和最小隔离,每个节点中要解决的协同问题 多个通信设备。 多个通信设备通过高频带信道无线电资源连接到统一网状网络。 统一网状网络适于允许多个通信设备彼此通信。 当需要在一组通信设备之间传送数据时,在统一网状网络上协商动态套接字连接,然后形成套接字无线电资源。 动态套接字形成适合于允许统一网状网络从统一网状网络信道卸载连续的接收机导向或组播业务,并释放统一网状网络的公共自组织通信带宽。
    • 10. 发明授权
    • Signal acquisition with efficient doppler search
    • 信号采集与高效多普勒搜索
    • US07636383B1
    • 2009-12-22
    • US11416619
    • 2006-05-03
    • Carlos J. ChavezGunther B. FrankRobert J. Frank
    • Carlos J. ChavezGunther B. FrankRobert J. Frank
    • H04B1/00
    • H04B1/7075
    • A receiver for computationally efficient signal acquisition of spread-spectrum chips affected by Doppler shift in an advanced tactical data link. Received signals with a very low signal-to-noise ratio are parsed in a multi-stage signal acquisition circuit architecture, and compared to a known sequence to determine correlation over a subset of the known sequence. Chip-rate-coherent correlation is performed over an interval of time for which the effect of Doppler shift on the chip rate are negligible. A non-coherent block then integrates intermediate metrics to obtain final metrics for the entire known sequence. The parsing of the correlation into subsets and stages allows for a more computationally efficient solution to the Doppler shift chip rate error problem by reducing the number of intermediate metrics that must be computed at high speed.
    • 用于在高级战术数据链路中受多普勒频移影响的扩频码片的计算有效信号采集的接收机。 在多级信号采集电路架构中解析具有非常低信噪比的接收信号,并与已知序列进行比较,以确定已知序列的子集上的相关性。 芯片速率相干相关是在多普勒频移对码片速率的影响可忽略的时间间隔上执行的。 然后,非相干块集成中间度量以获得整个已知序列的最终度量。 将相关性分解为子集和阶段允许通过减少必须以高速计算的中间度量的数量来更多地计算有效地解决多普勒频移码片率误差问题。