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31. 发明申请

US20110294449A1 SIGNAL-BASED GAIN CONTROL 有权
标题翻译：基于信号的增益控制
公开(公告)号：US20110294449A1
公开(公告)日：2011-12-01
申请号：US12890004
申请日：2010-09-24
申请人： Petru Cristian Budianu , David Jonathan Julian , Amal Ekbal
发明人： Petru Cristian Budianu , David Jonathan Julian , Amal Ekbal
IPC分类号： H04B1/16
CPC分类号： H03G3/3052 , G01S13/765
摘要： In a signal-based gain control scheme, one or more gain levels used for processing signals are selected based on characteristics of previously received signals. For example, different gain levels may be used to receive sets of signals whereupon certain characteristics of the received sets of signals are determined. One or more gain levels are then selected based on these characteristics whereby another signal is processed based on the selected gain level(s). In some aspects, the signal-based gain control scheme may be employed to facilitate two-way ranging operations between two devices. For example, leading edge detection may involve determining a characteristic of a received signal, determining a threshold based on the characteristic, and identifying a leading edge associated with the received signal based on the threshold. In some aspects, the signal-based gain control scheme may be employed in an ultra-low power pulse-based communication system (e.g., in ultra-wideband communication devices).
摘要翻译：在基于信号的增益控制方案中，基于先前接收到的信号的特性来选择用于处理信号的一个或多个增益电平。例如，可以使用不同的增益电平来接收信号集合，从而确定所接收的信号组的某些特性。然后基于这些特征选择一个或多个增益电平，由此基于所选择的增益电平处理另一个信号。在一些方面，可以采用基于信号的增益控制方案来促进两个设备之间的双向测距操作。例如，前沿检测可以涉及确定接收信号的特性，基于特性确定阈值，以及基于阈值来识别与接收信号相关联的前沿。在一些方面，基于信号的增益控制方案可以用于基于超低功率脉冲的通信系统（例如，在超宽带通信设备中）。

32. 发明申请

US20090245090A1 Broadband Pilot Channel Estimation Using A Reduced Order FFT and a Hardware Interpolator 有权
标题翻译：使用降序FFT和硬件插值器的宽带导频信道估计
公开(公告)号：US20090245090A1
公开(公告)日：2009-10-01
申请号：US12405082
申请日：2009-03-16
申请人： Petru Cristian Budianu , Arunava Chaudhuri , Raghu N. Challa
发明人： Petru Cristian Budianu , Arunava Chaudhuri , Raghu N. Challa
IPC分类号： H04J11/00 , H04K1/10
CPC分类号： H04L25/0202 , H04B1/76 , H04J11/00 , H04L25/0212 , H04L25/023 , H04L25/0232
摘要： Within a receiver, a channel estimation mechanism involves a hardware interpolator. In a first mode, narrowband pilot values are analyzed to generate channel parameters that are supplied to the interpolator such that the interpolator generates channel estimate values. The channel estimate values are used to demodulate a tile of a frame. In a second mode, broadband pilot values are supplied to an IFFT, thereby generating time domain values. After time domain processing, an FFT is employed to generate intermediate channel estimate values. These intermediate values are analyzed to determine channel parameters, which in turn are supplied to the hardware interpolator so that the interpolator generates a larger number of channel estimate values. After phase adjustment, the channel estimate values are used in demodulation. Use of the interpolator in the broadband mode allows the FFT employed to be of a smaller order, and to consume less power and/or processing resources.
摘要翻译：在接收机内，信道估计机制涉及硬件插值器。在第一模式中，分析窄带导频值以产生提供给内插器的信道参数，使得内插器生成信道估计值。信道估计值用于解调帧的瓦片。在第二模式中，宽带导频值被提供给IFFT，从而产生时域值。在时域处理之后，采用FFT来产生中间信道估计值。分析这些中间值以确定信道参数，其又被提供给硬件插值器，使得内插器产生更大数量的信道估计值。相位调整后，信道估计值用于解调。在宽带模式下使用内插器允许所采用的FFT具有较小的次序，并且消耗更少的功率和/或处理资源。

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