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1. 发明申请

US20120057492A1 Opportunistic 40 MHz Mode of Transmission in Wireless Transmitters 有权
标题翻译：机会40MHz无线发射机的传输模式
公开(公告)号：US20120057492A1
公开(公告)日：2012-03-08
申请号：US13279520
申请日：2011-10-24
申请人： Sandesh Goel , Timothy J. Donovan , Ken Kinwah Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
发明人： Sandesh Goel , Timothy J. Donovan , Ken Kinwah Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
IPC分类号： H04L12/26 , H04W4/00
CPC分类号： H04W72/04 , H04W74/0808
摘要： A system includes a signal processing module and a control module. The signal processing module receives a first clear channel assessment (CCA) signal for a first sub-channel of a communication channel, increases a pulse width of the first CCA signal by a predetermined period of time, and generates a second CCA signal. The control module receives the second CCA signal and a third CCA signal for a second sub-channel of the communication channel. The control module transmits data via one of the second sub-channel and the communication channel based on the second and third CCA signals.
摘要翻译：系统包括信号处理模块和控制模块。信号处理模块接收通信信道的第一子信道的第一清除信道评估（CCA）信号，将第一CCA信号的脉冲宽度增加预定时间段，并产生第二CCA信号。控制模块接收第二CCA信号和用于通信信道的第二子信道的第三CCA信号。控制模块基于第二和第三CCA信号，经由第二子信道和通信信道中的一个发送数据。

2. 发明授权

US08050200B2 Opportunistic 40 MHz mode of transmission in wireless transmitters 有权
标题翻译：机会性40 MHz无线发射机的传输模式
公开(公告)号：US08050200B2
公开(公告)日：2011-11-01
申请号：US11866754
申请日：2007-10-03
申请人： Sandesh Goel , Timothy J. Donovan , Ken Kinwah Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
发明人： Sandesh Goel , Timothy J. Donovan , Ken Kinwah Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
IPC分类号： H04B1/44 , G06F11/00 , H04L12/43
CPC分类号： H04W72/04 , H04W74/0808
摘要： A system includes a signal processing module and a control module. The signal processing module receives a first clear channel assessment (CCA) signal for a first sub-channel of a communication channel, increases a pulse width of the first CCA signal by a predetermined period of time, and generates a second CCA signal. The control module receives the second CCA signal and a third CCA signal for a second sub-channel of the communication channel. The control module transmits data via one of the second sub-channel and the communication channel based on the second and third CCA signals.
摘要翻译：系统包括信号处理模块和控制模块。信号处理模块接收通信信道的第一子信道的第一清除信道评估（CCA）信号，将第一CCA信号的脉冲宽度增加预定时间段，并产生第二CCA信号。控制模块接收第二CCA信号和用于通信信道的第二子信道的第三CCA信号。控制模块基于第二和第三CCA信号，经由第二子信道和通信信道中的一个发送数据。

3. 发明授权

US08441967B2 Opportunistic 40 MHz mode of transmission in wireless transmitters 有权
标题翻译：机会性40 MHz无线发射机的传输模式
公开(公告)号：US08441967B2
公开(公告)日：2013-05-14
申请号：US13279520
申请日：2011-10-24
申请人： Sandesh Goel , Timothy J. Donovan , Ken Kinwah Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
发明人： Sandesh Goel , Timothy J. Donovan , Ken Kinwah Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
IPC分类号： H04B1/44 , G06F11/00 , H04L12/43
CPC分类号： H04W72/04 , H04W74/0808
摘要： A system includes a signal processing module and a control module. The signal processing module receives a first clear channel assessment (CCA) signal for a first sub-channel of a communication channel, increases a pulse width of the first CCA signal by a predetermined period of time, and generates a second CCA signal. The control module receives the second CCA signal and a third CCA signal for a second sub-channel of the communication channel. The control module transmits data via one of the second sub-channel and the communication channel based on the second and third CCA signals.
摘要翻译：系统包括信号处理模块和控制模块。信号处理模块接收通信信道的第一子信道的第一清除信道评估（CCA）信号，将第一CCA信号的脉冲宽度增加预定时间段，并产生第二CCA信号。控制模块接收第二CCA信号和用于通信信道的第二子信道的第三CCA信号。控制模块基于第二和第三CCA信号，经由第二子信道和通信信道中的一个发送数据。

4. 发明申请

US20080084835A1 OPPORTUNISTIC 40 MHz MODE OF TRANSMISSION IN WIRELESS TRANSMITTERS 有权
标题翻译：机载40 MHz无线发射机传输模式
公开(公告)号：US20080084835A1
公开(公告)日：2008-04-10
申请号：US11866754
申请日：2007-10-03
申请人： Sandesh Goel , Timothy Donovan , Ken Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
发明人： Sandesh Goel , Timothy Donovan , Ken Ho , Yungping Hsu , Kedar Shirali , Atul Salhotra , Tam Tran , Chia-Chun Chung
IPC分类号： H04B7/00 , H04Q7/20
CPC分类号： H04W72/04 , H04W74/0808
摘要： A system includes a signal processing module and a control module. The signal processing module receives a first clear channel assessment (CCA) signal for a first sub-channel of a communication channel, increases a pulse width of the first CCA signal by a predetermined period of time, and generates a second CCA signal. The control module receives the second CCA signal and a third CCA signal for a second sub-channel of the communication channel. The control module transmits data via one of the second sub-channel and the communication channel based on the second and third CCA signals.
摘要翻译：系统包括信号处理模块和控制模块。信号处理模块接收通信信道的第一子信道的第一清除信道评估（CCA）信号，将第一CCA信号的脉冲宽度增加预定时间段，并产生第二CCA信号。控制模块接收第二CCA信号和用于通信信道的第二子信道的第三CCA信号。控制模块基于第二和第三CCA信号，经由第二子信道和通信信道中的一个发送数据。

5. 发明授权

US08218686B1 Circuit and method for DC offset compensation 有权
标题翻译：直流偏移补偿电路及方法
公开(公告)号：US08218686B1
公开(公告)日：2012-07-10
申请号：US12420470
申请日：2009-04-08
申请人： Sergey Timofeev , Atul Salhotra , Kedar Shirali , Srinivasa H. Garlapati
发明人： Sergey Timofeev , Atul Salhotra , Kedar Shirali , Srinivasa H. Garlapati
IPC分类号： H04L25/06 , H04L25/10
CPC分类号： H04L25/062 , H03D2200/0047
摘要： An apparatus has front end circuitry to demodulate a radio frequency signal and to produce a baseband signal, the radio frequency signal being periodic and having a predetermined period. An analog-to-digital converter converts the baseband signal into a digital signal, the digital signal being periodic and having the predetermined period. A DC offset adjustment circuit includes a filter for estimating a DC offset contained in the digital signal based only on digital samples in a sample period having a length equal to the predetermined period. An adder removes the estimated DC offset from the digital signal. A method of operating such an apparatus is also disclosed.
摘要翻译：一种装置具有用于解调射频信号并产生基带信号的前端电路，射频信号是周期性的并且具有预定周期。模数转换器将基带信号转换为数字信号，数字信号是周期性的并且具有预定周期。 DC偏移调整电路包括用于仅在具有等于预定周期的长度的采样周期中的数字样本上估计包含在数字信号中的DC偏移的滤波器。加法器从数字信号中去除估计的直流偏移。还公开了一种操作这种装置的方法。

6. 发明授权

US07924930B1 Robust synchronization and detection mechanisms for OFDM WLAN systems 有权
标题翻译： OFDM WLAN系统的鲁棒同步和检测机制
公开(公告)号：US07924930B1
公开(公告)日：2011-04-12
申请号：US11642442
申请日：2006-12-20
申请人： Atul Salhotra , Kedar Shirali , Zhiyu Yang , Hui-Ling Lou
发明人： Atul Salhotra , Kedar Shirali , Zhiyu Yang , Hui-Ling Lou
IPC分类号： H04K1/10 , H04L27/28 , H04B7/02 , H04L1/02
CPC分类号： H04B7/0857 , H04B7/084 , H04L2025/03414 , H04L2025/03426
摘要： A synchronization module for an orthogonal frequency-division multiplexing (OFDM) receiver system including a signal combination module that generates N combination signals that correspond to N received signals by performing at least one of weighted combining and selection and equal-gain-combining (EGC) on the N signals. A weighted signal generator module generates N weighted signals based on the N combination signals. N is an integer greater than one.
摘要翻译：一种用于正交频分复用（OFDM）接收机系统的同步模块，包括信号组合模块，其通过执行加权组合和选择以及等增益组合（EGC）中的至少一个来产生对应于N个接收信号的N个组合信号，对N信号。加权信号发生器模块基于N个组合信号产生N个加权信号。 N是大于1的整数。

7. 发明授权

US08275323B1 Clear-channel assessment in 40 MHz wireless receivers 有权
标题翻译： 40 MHz无线接收机的清晰通道评估
公开(公告)号：US08275323B1
公开(公告)日：2012-09-25
申请号：US11827958
申请日：2007-07-13
申请人： Kedar Shirali , Atul Salhotra , Zhiyu Yang
发明人： Kedar Shirali , Atul Salhotra , Zhiyu Yang
IPC分类号： H04B17/00
CPC分类号： H04W72/04 , H04B17/318 , H04W28/04 , H04W74/085
摘要： A system including an activity sensing module to sense RF activity in first and second sub-channels of a communication channel of a first wireless network. N adjacent channel interference (ACI) filter modules arranged in parallel receive signals from N antennas, respectively, filter out signals in channels adjacent to the communication channel, and generate N filtered signals, respectively, where N>2. The activity sensing module generates control signals based on the N filtered signals. A channel identification module processes the control signals, and determines that both of the first and second sub-channels are available when the RF activity originating from a second wireless network is not present in both of the first and second sub-channels, and that the first sub-channel is available when the RF activity originating from the second wireless network is present only in the second sub-channel and is less than or equal to a predetermined threshold.
摘要翻译：一种系统，包括用于感测第一无线网络的通信信道的第一和第二子信道中的RF活动的活动感测模块。 N个天线并行布置的N个相邻信道干扰（ACI）滤波器模块分别接收与通信信道相邻的信道中的信号，并分别产生N个滤波信号，其中N≥2。活动感测模块根据N个滤波信号产生控制信号。信道识别模块处理控制信号，并且当源自第二无线网络的RF活动不存在于第一和第二子信道中时，确定第一和第二子信道都可用，并且当来自第二无线网络的RF活动仅在第二子信道中存在且小于或等于预定阈值时，第一子信道可用。

8. 发明授权

US08838038B1 Clear-channel assessment in 40 MHz wireless receivers 有权
标题翻译： 40 MHz无线接收机的清晰通道评估
公开(公告)号：US08838038B1
公开(公告)日：2014-09-16
申请号：US13613996
申请日：2012-09-13
申请人： Kedar Shirali , Atul Salhotra , Zhiyu Yang
发明人： Kedar Shirali , Atul Salhotra , Zhiyu Yang
IPC分类号： H04B17/00 , H04W72/04
CPC分类号： H04W72/04 , H04B17/318 , H04W28/04 , H04W74/085
摘要： A system including a plurality of filter modules to respectively communicate with a plurality of antennas, filter signals from channels other than a communication channel of a first wireless network, where the communication channel includes a first channel and a second channel, and generate a plurality of signals. A sensing module senses, based on the plurality of signals, whether radio frequency signals from a second network are present in at least one of the first channel and the second channel, and generates a plurality of control signals indicating presence or absence of the radio frequency signals in at least one of the first channel and the second channel. A channel identification module determines, based on the plurality of control signals, availability of the first channel and the second channel in response to whether the radio frequency signals are present in the first channel and the second channel.
摘要翻译：一种系统，包括分别与多个天线通信的多个滤波器模块，从除第一无线网络的通信信道之外的信道中滤除信号，其中所述通信信道包括第一信道和第二信道，并且生成多个信号。感测模块基于多个信号来感测来自第二网络的射频信号是否存在于第一信道和第二信道中的至少一个中，并且生成指示有无射频的多个控制信号在第一通道和第二通道中的至少一个通道中的信号。信道识别模块响应于射频信号是否存在于第一信道和第二信道中，基于多个控制信号确定第一信道和第二信道的可用性。

9. 发明授权

US08369469B1 Robust synchronization and detection mechanisms for OFDM WLAN systems 有权
标题翻译： OFDM WLAN系统的鲁棒同步和检测机制
公开(公告)号：US08369469B1
公开(公告)日：2013-02-05
申请号：US13085350
申请日：2011-04-12
申请人： Atul Salhotra , Kedar Shirali , Zhiyu Yang , Hui-Ling Lou
发明人： Atul Salhotra , Kedar Shirali , Zhiyu Yang , Hui-Ling Lou
IPC分类号： H04L25/08
CPC分类号： H04B7/0857 , H04B7/084 , H04L2025/03414 , H04L2025/03426
摘要： A method including: receiving, through a wireless channel, a plurality of modulated signals at a plurality of antennas, wherein each antenna receives a corresponding modulated signal; generating a plurality of autocorrelated signals by autocorrelating the plurality of modulated signals; determining whether a signal strength associated with each modulated signal is (i) below a threshold or (ii) above the threshold; for each modulated signal having a signal strength below the threshold, disabling the antenna that received the modulated signal having the signal strength below the threshold; combining the modulated signals having a signal strength above the threshold; generating weighted autocorrelated signals based on (i) the plurality of autocorrelated signals and (ii) the combined modulated signals; generating a combined weighted signal by summing the weighted autocorrelation signals; demodulating the combined weighted signal; and determining a state of the wireless channel based on the demodulation of the combined weighted signal.
摘要翻译：一种方法，包括：通过无线信道在多个天线处接收多个调制信号，其中每个天线接收对应的调制信号; 通过对所述多个调制信号进行自相关来生成多个自相关信号; 确定与每个调制信号相关联的信号强度是否是（i）低于阈值或（ii）高于阈值; 对于具有低于阈值的信号强度的每个调制信号，禁用接收到信号强度低于阈值的调制信号的天线; 组合具有高于阈值的信号强度的调制信号; 基于（i）所述多个自相关信号和（ii）所述组合调制信号产生加权自相关信号; 通过对加权的自相关信号求和来产生组合的加权信号; 解调组合加权信号; 以及基于所述组合加权信号的解调来确定所述无线信道的状态。

10. 发明授权

US08224272B1 System for signal metric based receive selection 有权
标题翻译：基于信号度量的接收选择系统
公开(公告)号：US08224272B1
公开(公告)日：2012-07-17
申请号：US11999482
申请日：2007-12-05
申请人： Hongyuan Zhang , Zhiyu Yang , Kedar Shirali , Atul Salhotra
发明人： Hongyuan Zhang , Zhiyu Yang , Kedar Shirali , Atul Salhotra
IPC分类号： H04B17/02 , H04B1/16
CPC分类号： H04L27/0012 , H04B7/082 , H04L23/02 , H04L25/0262 , H04L27/2071
摘要： A wireless networking receiver with digital antenna switching selects an antenna with an 802.11b signal based on a signal metric, such as the highest signal quality or highest peak amplitude. In one embodiment, the receiver comprises a plurality of antennas that may each receive one of a plurality of RF signals conforming to the IEEE 802.11b standard. The receiver may have multiple antennas for use with the IEEE 802.11n standard, but may receive signals conforming to the 802.11b standard. The receiver also comprises a carrier sense circuit configured to calculate a signal metric for each of the signals and further configured to generate a selection signal signifying one of the signals, based on the signal metric. The receiver further comprises a multiplexer configured to output one of the signals, based on the selection signal. In another embodiment, a wireless networking receiver comprises signal receiving means, carrier sensing means for calculating and selecting a signal based on a signal metric, and multiplexer means to output the signal. A related method is also disclosed. Other embodiments are provided, and each of the embodiments described herein can be used alone or in combination with one another.
摘要翻译：具有数字天线切换的无线网络接收机基于诸如最高信号质量或最高峰值幅度的信号度量来选择具有802.11b信号的天线。在一个实施例中，接收机包括可以各自接收符合IEEE 802.11b标准的多个RF信号中的一个的多个天线。接收机可以具有用于IEEE 802.11n标准的多个天线，但是可以接收符合802.11b标准的信号。接收机还包括被配置为计算每个信号的信号度量的载波侦听电路，并进一步被配置为基于信号度量产生表示信号之一的选择信号。接收机还包括多路复用器，配置为基于选择信号输出信号之一。在另一个实施例中，无线联网接收机包括信号接收装置，用于基于信号度量计算和选择信号的载波检测装置，以及用于输出信号的多路复用装置。还公开了相关方法。提供了其它实施例，并且本文所述的每个实施例可以单独使用或彼此组合使用。

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