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1. 发明申请

US20100278214A1 Pulse-level interleaving for UWB systems 审中-公开
标题翻译： UWB系统的脉冲级交织
公开(公告)号：US20100278214A1
公开(公告)日：2010-11-04
申请号：US12387425
申请日：2009-05-01
申请人： Bryan L. Westcott , Gerald L. Fudge , Mark A. Chivers , Sujit Ravindran , Ross A. McClain, JR. , Scott Burkart
发明人： Bryan L. Westcott , Gerald L. Fudge , Mark A. Chivers , Sujit Ravindran , Ross A. McClain, JR. , Scott Burkart
IPC分类号： H04B1/69
CPC分类号： H04B1/7163 , H04B1/71635 , H04B1/71637
摘要： Systems and methods are disclosed that provide pulse-level interleaving for multi-pulse-per-bit ultra wideband (UWB) transmit and receive processing techniques to provide significantly improved multi-access for UWB systems and, more particularly, for long range UWB systems. A bit stream is processed such that each bit in a bit stream is represented by a plurality of bits in a bit frame and then transmitted using a plurality of UWB pulses for each bit frame. Where on-off-keying (OOK) modulation is used, each logic “1” is sent out as a plurality of pulses, and each logic “0” is sent out as a plurality of non-pulses. Pulse-level interleaving (PLI) of the pulses across multiple bit frames prior to transmission is provided to allow for improved multi-access (MA) by a plurality of UWB transmitters operating at the same time. Rather than attempt to detect each pulse as it arrives at the receiver, the receiver instead first de-interleaves the pulses and then aggregates the energy from the multiple pulses within each bit frame. The aggregated pulse energy is then processed by a pulse detector to detect a pulse. Where OOK modulation is used, this pulse detection detects the existence of a pulse or the lack of a pulse within the bit frame.
摘要翻译：公开了提供用于多脉冲每比特超宽带（UWB）发射和接收处理技术的脉冲级交织的系统和方法，以提供用于UWB系统的显着改进的多接入，更具体地，针对远距离UWB系统。处理比特流，使得比特流中的每个比特由比特帧中的多个比特表示，然后使用针对每个比特帧的多个UWB脉冲进行发送。在使用开 - 关键（OOK）调制的情况下，每个逻辑“1”作为多个脉冲发出，每个逻辑“0”作为多个非脉冲发送出去。提供在发送之前跨多个位帧的脉冲的脉冲级交织（PLI），以允许由同时操作的多个UWB发射机改进多址（MA）。每个脉冲到达接收机时，不是尝试检测每个脉冲，而是首先对脉冲进行解交织，然后从每个位帧内的多个脉冲聚合能量。聚集的脉冲能量然后由脉冲检测器处理以检测脉冲。在使用OOK调制的情况下，该脉冲检测检测脉冲的存在或位帧内缺少脉冲。

2. 发明申请

US20100277283A1 Systems and methods for RFID tag operation 审中-公开
标题翻译： RFID标签操作的系统和方法
公开(公告)号：US20100277283A1
公开(公告)日：2010-11-04
申请号：US12387460
申请日：2009-05-01
申请人： Scott M. Burkart , Ken A. Stroud , Joshua D. Anderson , Mark A. Chivers , Sujit Ravindran , Ross A. McClain, JR. , Jonathan E. Brown , James K. Burgess, III
发明人： Scott M. Burkart , Ken A. Stroud , Joshua D. Anderson , Mark A. Chivers , Sujit Ravindran , Ross A. McClain, JR. , Jonathan E. Brown , James K. Burgess, III
IPC分类号： H04Q5/22
CPC分类号： G06Q10/00 , H04Q2213/13095
摘要： A RFID tag system may be configured as a tag having a first band (e.g., multiple channel-based NBFM frequency band) transceiver to allow field programmability of tag behavior and onboard tag data. The RFID tag system may be configured to collect data from one or more local sensors through the first band link and store data points of interest in tag onboard storage. The RFID tag system may be configured to work in conjunction with a remote interrogating unit, and a handheld device or other local interrogating unit may be additionally or alternatively provided to communicate with such aRFID tag. Data that is stored on the RFID tag may be retrieved or changed, and/or the operation of the tag may be modified.
摘要翻译： RFID标签系统可以被配置为具有第一频带（例如，基于多个信道的NBFM频带）收发器的标签，以允许标签行为的现场可编程性和板载标签数据。 RFID标签系统可以被配置为通过第一频带链路从一个或多个本地传感器收集数据，并将感兴趣的数据点存储在标签板载存储器中。 RFID标签系统可以被配置为与远程询问单元一起工作，并且手持设备或其他本地询问单元可以被附加地或替代地提供以与这样的RID标签进行通信。可以检索或改变存储在RFID标签上的数据，和/或可以修改标签的操作。

3. 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。

4. 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。

5. 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。

6. 发明申请

US20100189208A1 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：US20100189208A1
公开(公告)日：2010-07-29
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。

7. 发明授权

US07436912B2 Nyquist folded bandpass sampling receivers and related methods 有权
标题翻译：奈奎斯特折叠带通采样接收机及相关方法
公开(公告)号：US07436912B2
公开(公告)日：2008-10-14
申请号：US11545642
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 wideband filters and modulated sampling clocks to identify received signals. In operation, multiple Nyquist zones are allowed to fold on top of each other during sampling. Because the RF sampling clock is modulated, separate frequency modulations can be induced within each Nyquist zone. The signals that are folded together from different Nyquist zones can then be identified and distinguished. In particular, when the Nyquist zones fold on top of each other, the different signals from different Nyquist zones can be separated and identified based on the fact that the added modulation is different for each Nyquist zone. Thus, by using one or more clock modulations to induce frequency modulations that are Nyquist zone dependent, multiple Nyquist zones can be aliased together while still allowing for signals from different Nyquist zones to be separated and identified. Other variations and implementations are also described.
摘要翻译：公开了奈奎斯特折叠带通采样接收机，其利用宽带滤波器和调制采样时钟来识别接收信号。在操作中，在采样期间允许多个奈奎斯特区域彼此顶部折叠。由于RF采样时钟被调制，因此可以在每个奈奎斯特（Nyquist）区域内引起单独的频率调制。然后可以识别和区分从不同奈奎斯特区域折叠在一起的信号。特别地，当奈奎斯特（Nyquist）区域彼此顶部折叠时，来自不同奈奎斯特区域的不同信号可以基于每个奈奎斯特区域增加的调制不同的事实来分离和识别。因此，通过使用一个或多个时钟调制来引起奈奎斯特区相关的频率调制，可以将多个奈奎斯特区域混叠在一起，同时允许来自不同奈奎斯特区域的信号被分离和识别。还描述了其它变型和实现。

8. 发明授权

US07436910B2 Direct bandpass sampling receivers with analog interpolation filters and related methods 有权
标题翻译：具有模拟插值滤波器和相关方法的直接带通采样接收器
公开(公告)号：US07436910B2
公开(公告)日：2008-10-14
申请号：US11545310
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： 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.
摘要翻译：公开了可重构的直接射频（RF）带通采样接收机，其利用模拟内插滤波器来提高性能。将模拟内插滤波器添加到带通采样接收器允许量化时钟从RF采样时钟去耦合。因此，可以以比初始RF采样慢得多的速率执行量化，从而允许最终模拟带宽比位于高速采样器之前的第一级滤波器的带宽窄得多。因此，可调谐带通滤波器，可调谐带通采样时钟和模拟内插滤波器的组合之后是比带通采样时钟更慢的采样和量化的进一步阶段，因此通过将量化采样率从高速采样率。如果需要，模拟插值滤波器也可以是可调谐的。还描述了其它变型和实现。

9. 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。

10. 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。

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