公开(公告)号：US20120183107A1

公开(公告)日：2012-07-19

申请号：US13351071

申请日：2012-01-16

Applicant: Mingrui Zhu ,  Arun Kedambadi ,  Seung Chul Hong ,  Anand Anandakumar

Inventor： Mingrui Zhu ,  Arun Kedambadi ,  Seung Chul Hong ,  Anand Anandakumar

IPC: H04B15/00

CPC classification number: H04L27/2605 ,  H04L25/0216 ,  H04L25/0222 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/2647 ,  H04L27/2655

Abstract: A method and system for combining a guard interval and a corresponding portion of a received symbol, whereby when receiving a signal that contains the symbol with a guard interval corresponding to the symbol, a portion of the guard interval that is free from inter-symbol interference may be extracted, and the extracted portion of the guard interval may be combined with the corresponding portion of the symbol. The extracting and combining may be done after a determining, based on a delay profile provided by the received signal, that a delay spread is smaller than a predetermined channel delay. The delay spread may be determined by filtering an instantaneous delay spread associated with the received signal. The filtering may be performed using a 1-tap infinite impulse response low-pass filter. The low-pass filter may include a time constant that is the inverse of a maximum Doppler frequency shift.

Abstract translation: 一种用于组合保护间隔和接收到的符号的对应部分的方法和系统，由此当接收到包含具有与该符号对应的保护间隔的符号的信号时，保护间隔的一部分没有符号间干扰 可以提取保护间隔的提取部分与符号的对应部分组合。 在基于由接收信号提供的延迟分布确定延迟扩展小于预定信道延迟之后，可以进行提取和组合。 可以通过对与接收信号相关联的瞬时延迟扩展进行滤波来确定延迟扩展。 可以使用1抽头无限脉冲响应低通滤波器来执行滤波。 低通滤波器可以包括与最大多普勒频移相反的时间常数。

公开(公告)号：US09739890B2

公开(公告)日：2017-08-22

申请号：US12939543

申请日：2010-11-04

Applicant: Ioannis Spyropoulos ,  Anand Anandakumar ,  Maxime Leclercq ,  Yves Rasse

Inventor： Ioannis Spyropoulos ,  Anand Anandakumar ,  Maxime Leclercq ,  Yves Rasse

IPC: G01S19/34

CPC classification number: G01S19/34

Abstract: A GPS receiver includes an RF front end for acquiring and tracking a satellite signal and a baseband processor configured to preserve power. The baseband processor includes a GPS engine configured to process the satellite signal and generate a PVT fix, a power supervisory module for receiving the PVT fix, and a user state module that determines an environmental state, wherein the power supervisory module may power down the GPS receiver for a period of time based on a result of the determined environment state. The baseband processor also includes a time-based management module that adjusts the TCXO in response to the determined environmental state. The GPS receiver includes a plurality of operation modes, each of which is associated with a plurality of tracking profiles.

公开(公告)号：US09008119B2

公开(公告)日：2015-04-14

申请号：US13646139

申请日：2012-10-05

Applicant: Anand Anandakumar ,  Serdar Yilmaz ,  Chi-Foun Kuen ,  Ravi Aripirala

Inventor： Anand Anandakumar ,  Serdar Yilmaz ,  Chi-Foun Kuen ,  Ravi Aripirala

IPC: H04J3/16 ,  H04N5/44 ,  H04N5/455 ,  H04L29/06

CPC classification number: H04L69/22 ,  H04J3/0658 ,  H04L12/4633 ,  H04L29/06176 ,  H04L49/101 ,  H04L65/607 ,  H04L69/28 ,  H04N5/44 ,  H04N5/455 ,  H04N21/4263 ,  H04N21/4343 ,  H04N21/4346 ,  H04N21/4382 ,  H04N21/4385

Abstract: An integrated circuit may comprise a tuner operable to digitize a band of frequencies comprising a plurality of television channels, a crossbar operable to select one or more of the plurality of television channels output by the tuner, a plurality of demodulators operable to receive the selected one or more television channels from the crossbar and demodulate the selected one or more television channels to recover a plurality of transport streams, a transport module operable to multiplex the plurality of transport streams into a single packet stream, and a framer operable to: encapsulate packets of the plurality of transport streams into transport stream frames of a serial datastream, and insert filler frames into the serial datastream after every Nth transport stream frame of the serial datastream, where N is an integer.

Abstract translation: 集成电路可以包括可操作以对包括多个电视频道的频带进行数字化的调谐器，可操作以选择由调谐器输出的多个电视频道中的一个或多个的交叉开关，多个解调器，其可操作以接收所选择的一个 或更多的电视频道，并且解调所选择的一个或多个电视频道以恢复多个传输流，传输模块，可操作以将多个传输流复用为单个分组流;以及成帧器，其可操作以：将包 多个传输流进入串行数据流的传输流帧，并且在串行数据流的每第N个传输流帧之后将填充帧插入到串行数据流中，其中N是整数。

公开(公告)号：US20130088646A1

公开(公告)日：2013-04-11

申请号：US13646139

申请日：2012-10-05

Applicant: Anand Anandakumar ,  Serdar Yilmaz ,  Chi-Foun Kuen ,  Ravi Aripirala

Inventor： Anand Anandakumar ,  Serdar Yilmaz ,  Chi-Foun Kuen ,  Ravi Aripirala

IPC: H04N5/455 ,  H04N5/44

CPC classification number: H04L69/22 ,  H04J3/0658 ,  H04L12/4633 ,  H04L29/06176 ,  H04L49/101 ,  H04L65/607 ,  H04L69/28 ,  H04N5/44 ,  H04N5/455 ,  H04N21/4263 ,  H04N21/4343 ,  H04N21/4346 ,  H04N21/4382 ,  H04N21/4385

Abstract: An integrated circuit may comprise a tuner operable to digitize a band of frequencies comprising a plurality of television channels, a crossbar operable to select one or more of the plurality of television channels output by the tuner, a plurality of demodulators operable to receive the selected one or more television channels from the crossbar and demodulate the selected one or more television channels to recover a plurality of transport streams, a transport module operable to multiplex the plurality of transport streams into a single packet stream, and a framer operable to: encapsulate packets of the plurality of transport streams into transport stream frames of a serial datastream, and insert filler frames into the serial datastream after every Nth transport stream frame of the serial datastream, where N is an integer.

公开(公告)号：US20120105277A1

公开(公告)日：2012-05-03

申请号：US13098314

申请日：2011-04-29

Applicant: Curtis Ling ,  Anand Anandakumar

Inventor： Curtis Ling ,  Anand Anandakumar

IPC: G01S19/00

CPC classification number: G01S19/05 ,  G01S19/256 ,  G01S19/31 ,  G01S19/34

Abstract: Systems and methods for extracting synchronization information from ambient signals, such as broadcast television signals, and using the synchronization information as a reference for correcting the local time base so that a GNSS positioning receiver system maintains relative time base accuracy with respect to a GNSS time.

Abstract translation: 从诸如广播电视信号的环境信号中提取同步信息的系统和方法，以及使用同步信息作为校正本地时基的参考，以使得GNSS定位接收机系统相对于GNSS时间维持相对的时基精度。

公开(公告)号：US20110280349A1

公开(公告)日：2011-11-17

申请号：US12947667

申请日：2010-11-16

Applicant: Seung-Chul Hong ,  Anand Anandakumar ,  Curtis Ling

Inventor： Seung-Chul Hong ,  Anand Anandakumar ,  Curtis Ling

IPC: H04L7/00 ,  H04L27/06

CPC classification number: H04L1/0023 ,  H04L5/0007 ,  H04L7/0016 ,  H04L25/0216 ,  H04L27/265 ,  H04L27/2665 ,  H04L27/2671 ,  H04L27/2695

Abstract: Systems and methods for adjusting timing in a communication system, such as an OFDM system are described. In one implementation an error signal is generated to adjust the timing of a variable rate interpolator so as to adjust FFT timing. The error signal may be based on detection of significant peaks in an estimate of the impulse response of the channel, with the peak locations being tracked over subsequent symbols and the system timing adjusted in response to changes in the peaks.

Abstract translation: 描述了用于调整诸如OFDM系统的通信系统中的定时的系统和方法。 在一个实现中，产生误差信号以调整可变速率内插器的定时，以便调整FFT定时。 误差信号可以基于在通道的脉冲响应的估计中检测到有效峰值，其中峰值位置在随后的符号上被跟踪，并且响应于峰值的变化来调整系统时序。

公开(公告)号：US20070279228A1

公开(公告)日：2007-12-06

申请号：US11809343

申请日：2007-05-31

Applicant: Martin Morris ,  Anand Anandakumar ,  Aliazam Abbasfar

Inventor： Martin Morris ,  Anand Anandakumar ,  Aliazam Abbasfar

IPC: G08B13/14 ,  G06F17/00 ,  G08B5/22

CPC classification number: G07G1/14 ,  G06Q10/087 ,  G06Q30/06

Abstract: An implementation of a signaling protocol for low power and large scale wireless networks provides a media access control (MAC) that produces a low rate two-way communication link between a commercial infrastructure and a very large number of small, low-cost devices known as electronic tags. The numerous tags attached to merchandise or shelves communicate with a number of access points (AP) distributed throughout a facility containing merchandise for sale or storage. A store controller maintains the pricing database for the point of sale (POS) registers of the facility. Price changes are transmitted in real time to the tag, thus updating the merchandise tags and the point of sales (POS) registers simultaneously. The tags contain a controller and a battery in which conservation of power is crucial to the life of the tags.

Abstract translation: 用于低功率和大规模无线网络的信令协议的实现提供了媒体接入控制（MAC），其在商业基础设施和大量小型，低成本的设备之间产生低速率双向通信链路，称为 电子标签。 连接到商品或货架上的许多标签与分发在包含销售或存储商品的设施的多个接入点（AP）通信。 商店控制器维护设施的销售点（POS）寄存器的定价数据库。 价格变化实时传输到标签，从而同时更新商品标签和销售点（POS）寄存器。 标签包含控制器和电池，其中电力守恒对于标签的寿命至关重要。