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1. 发明授权

US08001167B2 Automatic BNE seed calculator 有权
标题翻译：自动BNE种子计算器
公开(公告)号：US08001167B2
公开(公告)日：2011-08-16
申请号：US11967404
申请日：2007-12-31
申请人： Mark Allen Chivers , Sujit Ravindran
发明人： Mark Allen Chivers , Sujit Ravindran
IPC分类号： G06F7/00
CPC分类号： H03K19/177
摘要： An automatic background noise estimator (BNE) seed calculator for determining a starting point for a BNE circuit which tracks the noise floor received by a receiver. The BNE seed calculator may sample a plurality of data points from the receiver and calculate the magnitude of each point. The seed calculator may then determine the peak magnitude value, a plurality of mean values, and the variance of the sampled points. A plurality of lookup tables are used to compare the peak, mean, and variance values with simulated peak, mean, and variance values to estimate the noise floor level of the actual signal and use that to determine the optimum BNE seed value. Simulation software such as MATLAB is used to develop the lookup tables by simulating peak, mean, and variance values based on a plurality of signal-to-noise ratios (SNR).
摘要翻译：一种自动背景噪声估计器（BNE）种子计算器，用于确定跟踪由接收机接收的噪声基底的BNE电路的起始点。 BNE种子计算器可以从接收器采样多个数据点并计算每个点的幅度。种子计算器然后可以确定峰值幅度值，多个平均值和采样点的方差。使用多个查找表将峰值，平均值和方差值与模拟峰值，平均值和方差值进行比较，以估计实际信号的基底噪声水平，并使用它来确定最佳BNE种子值。仿真软件如MATLAB用于通过基于多个信噪比（SNR）模拟峰值，平均值和方差值来开发查找表。

2. 发明申请

US20090171632A1 AUTOMATIC BNE SEED CALCULATOR 有权
标题翻译：自动BNE种子计算器
公开(公告)号：US20090171632A1
公开(公告)日：2009-07-02
申请号：US11967404
申请日：2007-12-31
申请人： Mark Allen Chivers , Sujit Ravindran
发明人： Mark Allen Chivers , Sujit Ravindran
IPC分类号： G06F17/11
CPC分类号： H03K19/177
摘要： An automatic background noise estimator (BNE) seed calculator for determining a starting point for a BNE circuit which tracks the noise floor received by a receiver. The BNE seed calculator may sample a plurality of data points from the receiver and calculate the magnitude of each point. The seed calculator may then determine the peak magnitude value, a plurality of mean values, and the variance of the sampled points. A plurality of lookup tables are used to compare the peak, mean, and variance values with simulated peak, mean, and variance values to estimate the noise floor level of the actual signal and use that to determine the optimum BNE seed value. Simulation software such as MATLAB is used to develop the lookup tables by simulating peak, mean, and variance values based on a plurality of signal-to-noise ratios (SNR).
摘要翻译：一种自动背景噪声估计器（BNE）种子计算器，用于确定跟踪由接收机接收的噪声基底的BNE电路的起始点。 BNE种子计算器可以从接收器采样多个数据点并计算每个点的幅度。种子计算器然后可以确定峰值幅度值，多个平均值和采样点的方差。使用多个查找表将峰值，平均值和方差值与模拟峰值，平均值和方差值进行比较，以估计实际信号的基底噪声水平，并使用它来确定最佳BNE种子值。仿真软件如MATLAB用于通过基于多个信噪比（SNR）模拟峰值，平均值和方差值来开发查找表。

3. 发明授权

US09362979B2 Ultra wideband time-delayed correlator 有权
标题翻译：超宽带时间延迟相关器
公开(公告)号：US09362979B2
公开(公告)日：2016-06-07
申请号：US14714680
申请日：2015-05-18
申请人： Mark A. Chivers , Sujit Ravindran
发明人： Mark A. Chivers , Sujit Ravindran
IPC分类号： H04B1/7163 , H04B1/7176
CPC分类号： H04B1/71637 , H04B1/71635 , H04B1/7176
摘要： The present invention is for a method and apparatus to improve an ultra wideband (UWB) digital receiver's performance sensitivity. A transmitted signal stream has each data bit having multiple identical modulated pulses separated by a constant time interval. The received signal stream is applied to a plurality of signal processing groups where the original signal is duplicated in each processing group. The duplicated signal stream in each signal processing group is delayed by a different constant time interval between modulated pulses in the original signal stream and the two signal streams in each signal processing group is correlated and magnitude summed and combined to form a final signal stream which is detected to improve the sensitivity of the receiver.
摘要翻译：本发明是为了提高超宽带（UWB）数字接收机的性能灵敏度的方法和装置。传输的信号流具有由恒定时间间隔隔开的具有多个相同调制脉冲的每个数据位。接收的信号流被应用于多个信号处理组，其中原始信号在每个处理组中被复制。每个信号处理组中的复制信号流被延迟原始信号流中的调制脉冲之间的不同的恒定时间间隔，并且每个信号处理组中的两个信号流相关并且幅度相加并组合以形成最终的信号流检测到提高接收机的灵敏度。

4. 发明申请

US20120201274A1 Ultra-wideband dual band magnitude summer apparatus and method 有权
标题翻译：超宽带双频带幅度夏季装置及方法
公开(公告)号：US20120201274A1
公开(公告)日：2012-08-09
申请号：US13374386
申请日：2011-12-23
申请人： Mark A. Chivers , Sujit Ravindran
发明人： Mark A. Chivers , Sujit Ravindran
IPC分类号： H04B1/69
CPC分类号： H04B1/71637
摘要： This invention relates to capturing and processing the full bandwidth of an Ultra-Wideband (UWB) signal. An incoming UWB signal is processed in two different analog signal bands in parallel and their magnitudes summed to facilitate a Field programmable gate array (FPGA) processing of the entire UWB bandwidth to minimize digital implementation loss and promote a higher range.
摘要翻译：本发明涉及捕获和处理超宽带（UWB）信号的全带宽。输入的UWB信号在两个不同的模拟信号频带中并行处理，并且它们的幅度相加，以便于整个UWB带宽的现场可编程门阵列（FPGA）处理，以最小化数字实现损耗并提高更高的范围。

5. 发明申请

US20100202566A1 System and method for improved spur reduction in direct RF receiver architectures 失效
标题翻译：直接RF接收机架构改进支线减少的系统和方法
公开(公告)号：US20100202566A1
公开(公告)日：2010-08-12
申请号：US12592777
申请日：2009-12-02
申请人： Gerald L. Fudge , Ross E. Bland , Sujit Ravindran , Mark A. Chivers
发明人： Gerald L. Fudge , Ross E. Bland , Sujit Ravindran , Mark A. Chivers
IPC分类号： H04L27/14 , H04L27/00
CPC分类号： H04L27/148 , H04L27/1566
摘要： Improved spur reduction architectures that improve linearity in direct radio frequency (RF) receiver architectures. Non-uniform sampling in the form of sampling clock phase (or frequency) modulation is used to induce phase (or frequency) modulation on signals that are being received from a given Nyquist zone. At the output of the ADC (analog-to-digital converter), the signals are de-modulated to remove the induced modulation based on the Nyquist zone that is being received. The de-modulation process results in non-desired spurious artifacts (interfering leakage signals and ADC spurs) being spread in the frequency domain. Strong spurious artifacts may be removed after measuring the induced modulation and de-modulating. For the case of weak spurious artifacts, the de-modulation for the desired Nyquist zone spread these signals in the frequency domain. Induced modulation on signals may also provide a dithering effect on the ADC.
摘要翻译：改进的直接射频（RF）接收机架构改善线性度的减少架构。以采样时钟相位（或频率）调制形式的非均匀采样用于对从给定奈奎斯特区域接收的信号进行相位（或频率）调制。在ADC（模拟 - 数字转换器）的输出端，信号被去调制，以消除基于接收到的奈奎斯特区域的感应调制。去调制过程导致在频域中扩展的非期望的伪伪影（干扰泄漏信号和ADC刺激）。在测量诱导的调制和解调后，可能会去除强杂散伪像。对于弱伪伪影的情况，期望的奈奎斯特地带的去调制在频域中扩展了这些信号。对信号的诱导调制也可能对ADC产生抖动效应。

6. 发明授权

US07436911B2 Nyquist folded bandpass sampling receivers with narrow band filters for UWB pulses and related methods 有权
标题翻译：奈奎斯特折叠带通采样接收机，具有窄带滤波器，用于UWB脉冲和相关方法
公开(公告)号：US07436911B2
公开(公告)日：2008-10-14
申请号：US11545641
申请日：2006-10-10
申请人： Gerald L. Fudge , James E. Harvey , Mark A. Chivers , Sujit Ravindran
发明人： Gerald L. Fudge , James E. Harvey , Mark A. Chivers , Sujit Ravindran
IPC分类号： H03D1/00
CPC分类号： H04B1/406 , H03M1/12 , H04B1/0003 , H04B1/71637
摘要： Nyquist folded bandpass sampling receivers are disclosed that utilize narrow band filters in parallel with wideband filters to enhance reception of ultra wideband (UWB) pulses. The addition of the narrow band filter facilitates the reception of ultra wideband signal pulses and, therefore, extends the Nyquist folding bandpass sampling receiver to allow improved processing of ultra wideband (UWB) pulses. RF sampling circuitry utilizing a modulated sampling clock signal can then better capture UWB pulse signals.
摘要翻译：公开了奈奎斯特折叠带通采样接收机，其利用与宽带滤波器并联的窄带滤波器来增强超宽带（UWB）脉冲的接收。窄带滤波器的添加有助于接收超宽带信号脉冲，因此扩展了奈奎斯特折叠带通采样接收机，以允许对超宽带（UWB）脉冲进行改进的处理。利用调制采样时钟信号的RF采样电路可以更好地捕获UWB脉冲信号。

7. 发明申请

US20150249481A1 ULTRA WIDEBAND TIME-DELAYED CORRELATOR 审中-公开
标题翻译：超声波宽带时间延迟器
公开(公告)号：US20150249481A1
公开(公告)日：2015-09-03
申请号：US14714680
申请日：2015-05-18
申请人： Mark A. Chivers , Sujit Ravindran
发明人： Mark A. Chivers , Sujit Ravindran
IPC分类号： H04B1/7163 , H04B1/717 , H04B1/709 , H04B1/7176
CPC分类号： H04B1/71637 , H04B1/71635 , H04B1/7176
摘要： The present invention is for a method and apparatus to improve an ultra wideband (UWB) digital receiver's performance sensitivity. A transmitted signal stream has each data bit having multiple identical modulated pulses separated by a constant time interval. The received signal stream is applied to a plurality of signal processing groups where the original signal is duplicated in each processing group. The duplicated signal stream in each signal processing group is delayed by a different constant time interval between modulated pulses in the original signal stream and the two signal streams in each signal processing group is correlated and magnitude summed and combined to form a final signal stream which is detected to improve the sensitivity of the receiver.
摘要翻译：本发明是为了提高超宽带（UWB）数字接收机的性能灵敏度的方法和装置。传输的信号流具有由恒定时间间隔隔开的具有多个相同调制脉冲的每个数据位。接收的信号流被应用于多个信号处理组，其中原始信号在每个处理组中被复制。每个信号处理组中的复制信号流被延迟原始信号流中的调制脉冲之间的不同的恒定时间间隔，并且每个信号处理组中的两个信号流相关并且幅度相加并组合以形成最终的信号流检测到提高接收机的灵敏度。

8. 发明授权

US08509354B2 System and method for improved spur reduction in direct RF receiver architectures 失效
标题翻译：直接RF接收机架构改进支线减少的系统和方法
公开(公告)号：US08509354B2
公开(公告)日：2013-08-13
申请号：US12592777
申请日：2009-12-02
申请人： Gerald L. Fudge , Ross E. Bland , Sujit Ravindran , Mark A. Chivers
发明人： Gerald L. Fudge , Ross E. Bland , Sujit Ravindran , Mark A. Chivers
IPC分类号： H04L27/00
CPC分类号： H04L27/148 , H04L27/1566
摘要： Improved spur reduction architectures that improve linearity in direct radio frequency (RF) receiver architectures. Non-uniform sampling in the form of sampling clock phase (or frequency) modulation is used to induce phase (or frequency) modulation on signals that are being received from a given Nyquist zone. At the output of the ADC (analog-to-digital converter), the signals are de-modulated to remove the induced modulation based on the Nyquist zone that is being received. The de-modulation process results in non-desired spurious artifacts (interfering leakage signals and ADC spurs) being spread in the frequency domain. Strong spurious artifacts may be removed after measuring the induced modulation and de-modulating. For the case of weak spurious artifacts, the de-modulation for the desired Nyquist zone spread these signals in the frequency domain. Induced modulation on signals may also provide a dithering effect on the ADC.
摘要翻译：改进的直接射频（RF）接收机架构改善线性度的减少架构。以采样时钟相位（或频率）调制形式的非均匀采样用于对从给定奈奎斯特区域接收的信号进行相位（或频率）调制。在ADC（模拟 - 数字转换器）的输出端，信号被去调制，以消除基于接收到的奈奎斯特区域的感应调制。去调制过程导致在频域中扩展的非期望的伪伪影（干扰泄漏信号和ADC刺激）。在测量诱导的调制和解调后，可能会去除强杂散伪像。对于弱伪伪影的情况，期望的奈奎斯特地带的去调制在频域中扩展了这些信号。对信号的诱导调制也可能对ADC产生抖动效应。

9. 发明申请

US20080013653A1 Direct bandpass sampling receivers with analog interpolation filters and related methods 有权
公开(公告)号：US20080013653A1
公开(公告)日：2008-01-17
申请号：US11545310
申请日：2006-10-10
申请人： Gerald Fudge , James Harvey , Mark Chivers , Sujit Ravindran
发明人： Gerald Fudge , James Harvey , Mark Chivers , Sujit Ravindran
IPC分类号： H04L27/08
CPC分类号： H04B1/406 , H03M1/12 , H04B1/0003 , H04B1/71637
摘要： Reconfigurable direct radio frequency (RF) bandpass sampling receivers are disclosed that utilize analog interpolation filters to improve performance. The addition of the analog interpolation filter to the bandpass sampling receiver allows the quantization clock to be de-coupled from the RF sampling clock. As such, the quantization can be performed at a much slower rate than the initial RF sampling allowing the final analog bandwidth to be much narrower than the bandwidth of the first stage filter located before the high-speed sampler. The combination of a tunable bandpass filter, tunable bandpass sample clock and analog interpolation filter followed by a further stage of sampling and quantization at a slower rate than the bandpass sample clocking, therefore, provides significant advantageous by de-coupling the quantization sample rate from the high-speed sample rate. If desired, the analog interpolation filter may also be tunable. Other variations and implementations are also described.

10. 发明授权

US08509368B2 System and method for clock jitter compensation in direct RF receiver architectures 失效
标题翻译：直接RF接收机架构中时钟抖动补偿的系统和方法
公开(公告)号：US08509368B2
公开(公告)日：2013-08-13
申请号：US12592776
申请日：2009-12-02
申请人： Gerald L. Fudge , Mark A. Chivers , Sujit Ravindran , Alex Yeh
发明人： Gerald L. Fudge , Mark A. Chivers , Sujit Ravindran , Alex Yeh
IPC分类号： H04L7/00
CPC分类号： H04L7/0083 , H04B1/28
摘要： Systems and methods that provide clock jitter compensation architectures that improve the performance of direct radio frequency (RF) receivers by injecting a calibration tone into the received radio frequency (RF) signals in order to help identify and then compensate for the clock jitter noise. After injecting the tone, the jitter noise going through the direct RF bandpass sampling receiver is estimated using a narrow bandwidth filter, and the received signals are further processed and demodulated depending on the Nyquist zone of the received signal. The relative modulation factor for the modulation is computed and then applied to the Nyquist zone to de jitter that particular Nyquist zone.
摘要翻译：提供时钟抖动补偿架构的系统和方法，其通过向接收的射频（RF）信号注入校准音，来改善直接射频（RF）接收机的性能，以帮助识别并补偿时钟抖动噪声。在注入音频之后，通过使用窄带宽滤波器来估计通过直接RF带通采样接收机的抖动噪声，并根据接收信号的奈奎斯特区域进一步处理和解调接收的信号。计算调制的相对调制因子，然后将其应用于奈奎斯特（Nyquist）区域以去抖动特定奈奎斯特（Nyquist）区域。

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