公开(公告)号：US08805312B2

公开(公告)日：2014-08-12

申请号：US13193088

申请日：2011-07-28

申请人： Jaiganesh Balakrishnan

发明人： Jaiganesh Balakrishnan

IPC分类号： H04B17/00

CPC分类号： H04B1/12 ,  H04B1/10 ,  H04B1/1027 ,  H04B1/1646 ,  H04B17/20 ,  H04B17/318 ,  H04B17/336 ,  H04B2001/1054 ,  H04H40/72

摘要： A wireless receiver (10) includes a down converter module (210) operable to deliver a signal having a signal bandwidth that changes over time, a dynamically controllable filter module (200) having a filter bandwidth and fed by said down converter module (210), and a measurement module (295) operable to at least approximately measure the signal bandwidth, said dynamically controllable filter module (200) responsive to said measurement module (295) to dynamically adjust the filter bandwidth to more nearly match the signal bandwidth as it changes over time, whereby output from said filter module (200) is noise-reduced. Other wireless receivers, electronic circuits, and processes for their operation are disclosed.

摘要翻译： 无线接收器（10）包括可转换信号的下变频器模块（210），其具有随时间变化的信号带宽，具有滤波器带宽并由所述下变换器模块（210）馈送的动态可控滤波器模块（200） ，以及可操作以至少近似地测量所述信号带宽的测量模块（295），所述动态可控滤波器模块（200）响应于所述测量模块（295）来动态地调整所述滤波器带宽，使得所述滤波器带宽随着其变化而更接近所述信号带宽 随着时间的推移，来自所述滤波器模块（200）的输出被降噪。 公开了其他无线接收机，电子电路及其操作的处理。

公开(公告)号：US20100232548A1

公开(公告)日：2010-09-16

申请号：US12720688

申请日：2010-03-10

申请人： Jaiganesh BALAKRISHNAN ,  Aravind Ganesan

发明人： Jaiganesh BALAKRISHNAN ,  Aravind Ganesan

IPC分类号： H04L27/14

CPC分类号： H04L27/2272 ,  H04L1/0045 ,  H04L1/0057 ,  H04L27/233 ,  H04L2027/0067 ,  H04L2027/0085 ,  H04L2027/0087

摘要： Demodulation and decoding for frequency modulation (FM) receivers with radio data system (RDS) or radio broadcast data system (RBDS). An example of a method for processing a signal in a receiver includes quantizing a demodulated signal to generate bits in response to receipt of the demodulated signal. The method also includes grouping the bits into one or more blocks. The method further includes computing a syndrome for a block from the one or more blocks. Moreover, the method includes identifying error, corresponding to the syndrome, in the block based on type of demodulation. The type of demodulation includes a coherent demodulation and a differential demodulation. Furthermore, the method includes correcting the error in the block.

摘要翻译： 具有无线电数据系统（RDS）或无线电广播数据系统（RBDS）的频率调制（FM）接收机的解调和解码。 用于处理接收机中的信号的方法的示例包括量化解调信号以响应于接收到解调信号而产生位。 该方法还包括将比特分组成一个或多个块。 该方法还包括从一个或多个块计算块的综合征。 此外，该方法包括基于解调的类型来识别与块中相对应的错误。 解调的类型包括相干解调和差分解调。 此外，该方法包括校正块中的错误。

公开(公告)号：US20100232490A1

公开(公告)日：2010-09-16

申请号：US12712216

申请日：2010-02-25

申请人： JAIGANESH BALAKRISHNAN ,  Prashant Kota

发明人： JAIGANESH BALAKRISHNAN ,  Prashant Kota

IPC分类号： H04B17/00 ,  H03D1/04

CPC分类号： H03D1/04 ,  H03D3/009

摘要： A method and apparatus for compensating a modulation imbalance effect in a communication device. In one embodiment, at least three sets of modulation imbalance parameters (MIPs) are estimated by executing an auto balance sequence. The at least three sets of MIPs correspond to a baseband signal configured to have at least three configurable frequencies, each of the at least three sets of MIPs corresponds to one of at least three configurable frequencies. The auto balance sequence is configured to provide an offset signal generated within a communication device to trigger generation of each one of the at least three configurable frequencies. The at least three sets of MIPs are filtered to select a filtered set. The modulation imbalance effect is compensated by using the filtered set to reduce distortion of the baseband signal in the communication device.

摘要翻译： 一种用于补偿通信设备中的调制不平衡效应的方法和装置。 在一个实施例中，通过执行自动平衡序列来估计至少三组调制不平衡参数（MIP）。 所述至少三组MIP对应于被配置为具有至少三个可配置频率的基带信号，所述至少三组MIP中的每一个对应于至少三个可配置频率中的一个。 自动平衡序列被配置为提供在通信设备内生成的偏移信号，以触发所述至少三个可配置频率中的每一个的产生。 对至少三组MIP进行过滤以选择过滤集。 通过使用滤波器组来补偿调制不平衡效应，以减少通信设备中的基带信号的失真。

公开(公告)号：US07756002B2

公开(公告)日：2010-07-13

申请号：US10688169

申请日：2003-10-18

申请人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand G. Dabak ,  Ranjit Gharpurey ,  Paul H. Fontaine ,  Heng-Chih Lin

发明人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand G. Dabak ,  Ranjit Gharpurey ,  Paul H. Fontaine ,  Heng-Chih Lin

IPC分类号： H04J11/00

CPC分类号： H04B1/7163 ,  H04L1/0041 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/0075 ,  H04L27/2602

摘要： A PHY entity for a UWB system utilizes the unlicensed 3.1-10.6 GHZ UWB band, as regulated in the United States by the Code of Federal Regulation, Title 47, Section 15. The UWB system provides a wireless pico area network (PAN) with data payload communication capabilities of 55, 80, 110, 160, 200, 320 and 480 Mb/s. The UWB system employs orthogonal frequency division multiplexing (OFDM) and uses a total of 122 sub-carriers that are modulated using quadrature phase shift keying (QPSK). Forward error correction coding (convolutional coding) is used with a coding rate of 11/32, 1/2, 5/8 and 3/4.

摘要翻译： UWB系统的PHY实体利用美国由“联邦法规”第47章第15节规定的未经授权的3.1-10.6 GHZ UWB频带。UWB系统提供无线微微区域网络（PAN）与数据 有效载荷通信能力为55,80,110,160,200,320和480 Mb / s。 UWB系统采用正交频分复用（OFDM），并且使用使用正交相移键控（QPSK）调制的总共122个子载波。 前向纠错编码（卷积编码）的编码率为11/32，1/2，5/8和3/4。

公开(公告)号：US07668265B2

公开(公告)日：2010-02-23

申请号：US11173840

申请日：2005-07-01

申请人： Jaiganesh Balakrishnan ,  Hirohisa Yamaguchi

发明人： Jaiganesh Balakrishnan ,  Hirohisa Yamaguchi

IPC分类号： H03D1/04

CPC分类号： H04L27/2613 ,  H04B1/719 ,  H04L25/03828 ,  H04L27/2626

摘要： A method of wirelessly communicating is disclosed. The method comprises determining a matrix W based in part on limiting a plurality of active interference cancellation tone values (416), determining the active interference cancellation tone values (416) based on W and based on a plurality of information data values (410), and transmitting an orthogonal frequency division multiplex signal (310) based on the plurality of active interference cancellation tone values (416) and the information data values (410).

摘要翻译： 公开了一种无线通信的方法。 该方法包括：基于限制多个主动干扰消除音调值（416），基于W并基于多个信息数据值（410）确定主动干扰消除音调值（416）来确定矩阵W， 以及基于所述多个有源干扰消除音调值（416）和所述信息数据值（410）发送正交频分复用信号（310）。

公开(公告)号：US07634020B2

公开(公告)日：2009-12-15

申请号：US10782095

申请日：2004-02-19

申请人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand Dabak

发明人： Anuj Batra ,  Jaiganesh Balakrishnan ,  Anand Dabak

IPC分类号： H04L27/00

CPC分类号： H04B1/7093 ,  H04B1/709 ,  H04L27/2613

摘要： System and method for simplifying preamble detection and reducing power consumption in receivers. A preferred embodiment comprises a preamble made up of two sequences, a first sequence that is specified in the time domain and a second sequence that is specified in the frequency domain. The first sequence which comprises multiple copies of a time domain code sequence can allow easy detection of the preamble while the second sequence comprises multiple copies of a frequency domain code sequence and allows easy determination of the frequency response of the communications channel. A hierarchical sequence can be used to allow multi-stage correlation. This can result in a less complex correlator, hence lower power consumption. Piconets can use different code sequences to allow rapid determination of the source of a transmission without requiring the receiver to decode the entire transmission.

摘要翻译： 用于简化前导码检测并降低接收机功耗的系统和方法。 优选实施例包括由两个序列组成的前导码，在时域中指定的第一序列和在频域中指定的第二序列。 包括时域码序列的多个副本的第一序列可以容易地检测前置码，而第二序列包括频域码序列的多个副本，并且允许容易地确定通信信道的频率响应。 可以使用分级序列来允许多级相关。 这可能导致较不复杂的相关器，从而降低功耗。 微微网可以使用不同的码序列来快速确定传输源，而不需要接收机对整个传输进行解码。

公开(公告)号：US20090028220A1

公开(公告)日：2009-01-29

申请号：US11893050

申请日：2007-08-13

申请人： June Chul Roh ,  Anuj Batra ,  Manoneet Singh ,  Jaiganesh Balakrishnan

发明人： June Chul Roh ,  Anuj Batra ,  Manoneet Singh ,  Jaiganesh Balakrishnan

IPC分类号： H04B1/713 ,  H04L27/06

CPC分类号： H04L25/0216 ,  H04B17/327 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2656 ,  H04L27/2662 ,  H04L27/2675

摘要： A method. The method includes producing a first signal match indication based on at least one match indication indicative of a match between at least one signal received in at least one band and a reference signal. The method also includes producing a first signal multipath combined signal based upon the first signal match indication, and detecting a first peak in the first multipath combined signal.

摘要翻译： 一个方法。 该方法包括基于指示在至少一个频带中接收的至少一个信号与参考信号之间的匹配的至少一个匹配指示产生第一信号匹配指示。 该方法还包括基于第一信号匹配指示产生第一信号多径组合信号，以及检测第一多路复合信号中的第一峰值。

公开(公告)号：US07305028B2

公开(公告)日：2007-12-04

申请号：US10390289

申请日：2003-03-17

申请人： Jaiganesh Balakrishnan ,  Richard K. Martin ,  C. Richard Johnson, Jr.

发明人： Jaiganesh Balakrishnan ,  Richard K. Martin ,  C. Richard Johnson, Jr.

IPC分类号： H03K5/159 ,  H04B1/10

CPC分类号： H04L25/03012 ,  H04L2025/03414

摘要： A method for equalizing data and systems utilizing the method. The method of this invention for equalizing (by shortening the channel response) data includes minimizing a function of the data and a number of equalizer characteristic parameters, where the function utilizes auto-correlation data corresponding to equalized data. Updated equalizer characteristic parameters are then obtained from the minimization and an initial set of equalizer characteristic parameters. Finally, the received data is processed utilizing the equalizer defined by the minimization. The method of this invention can be implemented in an equalizer and the equalizer of this invention may be included in a system for receiving data.

摘要翻译： 一种利用该方法均衡数据和系统的方法。 用于均衡（通过缩短信道响应）数据的本发明的方法包括最小化数据的功能和多个均衡器特性参数，其中该功能利用对应于均衡数据的自相关数据。 然后从最小化和初始的均衡器特征参数集获得更新的均衡器特征参数。 最后，使用由最小化定义的均衡器来处理接收到的数据。 本发明的方法可以在均衡器中实现，并且本发明的均衡器可以被包括在用于接收数据的系统中。

公开(公告)号：US20070076804A1

公开(公告)日：2007-04-05

申请号：US11240203

申请日：2005-09-30

申请人： Charles Sestok ,  Anand Dabak ,  Jaiganesh Balakrishnan

发明人： Charles Sestok ,  Anand Dabak ,  Jaiganesh Balakrishnan

IPC分类号： H04K1/10

CPC分类号： H04L25/0232 ,  H04B1/123 ,  H04L27/261

摘要： The present invention provides an image-rejecting channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment, the image-rejecting channel estimator includes an estimation interpolator configured to provide channel estimates through time interpolation and frequency interpolation employing the scattered pilot channel estimates. The image-rejecting channel estimator also includes an image-rejection formatter coupled to the estimation interpolator and configured to provide image-rejection filtering to suppress an image in an output spectrum of the channel estimates from at least one of the time interpolation and frequency interpolation.

摘要翻译： 本发明提供一种与使用分散导频信道估计的正交频分复用（OFDM）接收机一起使用的图像拒绝信道估计器。 在一个实施例中，图像拒绝信道估计器包括估计内插器，被配置为通过使用分散导频信道估计的时间插值和频率插值来提供信道估计。 图像拒绝信道估计器还包括耦合到估计内插器的镜像拒绝格式器，并且被配置为提供镜像抑制滤波以从时间插值和频率插值中的至少一个抑制信道估计的输出频谱中的图像。

公开(公告)号：US20060167964A1

公开(公告)日：2006-07-27

申请号：US11336459

申请日：2006-01-20

申请人： Jaiganesh Balakrishnan ,  Manish Goel

发明人： Jaiganesh Balakrishnan ,  Manish Goel

IPC分类号： G06F17/14

CPC分类号： H04L27/265 ,  G06F17/142

摘要： In at least some embodiments, a method is provided. The method includes receiving samples from a first input channel and a second input channel. The method further includes controlling commutators to selectively switch samples between the first and second input channels for input to a radix-2 butterfly. The method further includes continuously activating the radix-2 butterfly while processing samples received from the first input channel followed by samples received from the second input channel.

摘要翻译： 在至少一些实施例中，提供了一种方法。 该方法包括从第一输入通道和第二输入通道接收采样。 该方法还包括控制换向器以选择性地在第一和第二输入通道之间切换采样，以输入到基数-2蝴蝶。 该方法还包括在处理从第一输入通道接收的样本后跟从第二输入通道接收的采样时连续激活基数-2蝶形。