公开(公告)号：US5952853A

公开(公告)日：1999-09-14

申请号：US997148

申请日：1997-12-23

Applicant: Scott D. Willingham ,  William J. McFarland

Inventor： Scott D. Willingham ,  William J. McFarland

IPC: G01R25/00 ,  H03D13/00 ,  H03K5/26 ,  H03L7/081 ,  H03L7/085 ,  H03L7/089

CPC classification number: G01R25/00 ,  H03D13/004 ,  H03L7/081 ,  H03L7/089

Abstract: A circuit for generating a signal that is proportional to the phase difference between a reference signal and a variable frequency signal. The circuit includes a reference generating circuit for generating N phase shifted reference signals from the reference signal. Each of the phase shifted reference signals has the same frequency and a different phase. The phase of the n.sup.th one of the phase shifted reference signals is equal to 360n/N degrees, where N>1 and n runs from 0 to N-1. A phase detection circuit generates a phase output signal proportional to the phase difference between the variable frequency signal and the phase shifted reference signal currently being outputted by the reference generating circuit. The phase output signal has value of I when the output signal corresponds to a phase difference of 360/N degrees. An overflow detection circuit determines when the phase output signal has an absolute value greater than I and generates a count signal and a phase adjustment signal when this situation is detected. The phase adjustment signal is coupled to the reference generating circuit and causes the reference generating circuit to select a new phase shifted reference signal. A counter is then incremented/decremented to track the accumulated phase adjustments. A digital to analog converter converts the digital value in the counter to a signal having an amplitude equal to MI, where M is the digital value. A sum circuit adds this signal to the phase output signal.

Abstract translation: 用于产生与参考信号和可变频率信号之间的相位差成比例的信号的电路。 电路包括用于从参考信号产生N个相移参考信号的参考产生电路。 每个相移参考信号具有相同的频率和不同的相位。 第n个相移参考信号的相位等于360n / N度，其中N≥1且n从0到N-1。 相位检测电路产生与参考发生电路当前正在输出的可变频率信号和相移参考信号之间的相位差成比例的相位输出信号。 当输出信号对应于360 / N度的相位差时，相位输出信号的值为I。 溢出检测电路确定相位输出信号何时具有大于I的绝对值，并且当检测到这种情况时产生计数信号和相位调整信号。 相位调整信号耦合到参考产生电路，并使基准产生电路选择新的相移基准信号。 然后计数器递增/递减，以跟踪累积的相位调整。 数模转换器将计数器中的数字值转换为幅度等于MI的信号，其中M是数字值。 总和电路将该信号添加到相位输出信号。

公开(公告)号：US5678222A

公开(公告)日：1997-10-14

申请号：US321501

申请日：1994-10-12

Applicant: Thomas Hornak ,  Andrew Z. Grzegorek ,  William J. McFarland ,  Richard C. Walker ,  Scott D. Willingham

Inventor： Thomas Hornak ,  Andrew Z. Grzegorek ,  William J. McFarland ,  Richard C. Walker ,  Scott D. Willingham

IPC: H04L27/34 ,  H03B19/00 ,  H03B27/00 ,  H03D7/00 ,  H03D7/14 ,  H03D7/16 ,  H03D7/18 ,  H04B1/10 ,  H04B1/26 ,  H04L27/18 ,  H04B1/16

CPC classification number: H03D7/00 ,  H03D7/1441 ,  H03D7/1483 ,  H03D7/165 ,  H03D7/18 ,  H03B19/00 ,  H03B2200/0064 ,  H03B27/00 ,  H03D2200/0017 ,  H03D2200/005 ,  H03D2200/006 ,  H03D2200/0078 ,  H03D2200/0082 ,  H03D7/161

Abstract: A time-share mixer circuit and a frequency converter, an I-Q modulator, and an I-Q demodulator. A switching signal drives the time-share mixer circuit to alternate between two output signals. The first output signal represents the output of a mixer having a given signal input and a local oscillator signal with a first phase as its local oscillator input. The second output signal represents the output of the mixer having the same input signal and the local oscillator signal with a second phase that differs from the first phase by 90 degrees as its local oscillator input signal. The frequency converter uses the time-share mixer in combination with a switched output phase shifter that switches in sync with the phase of the local oscillator signal to generate a phase shifted output signal in which the time average of an undesired image signal is substantially reduced compared to time average of the desired signal. The phase shifted output signal is then amplified by a bandpass amplifier. A clocked inverter in series with one of the mixer ports provides improved performance by eliminating the need for two precisely phase-shifted local oscillator signals.

Abstract translation: 时分混频器电路和频率转换器，I-Q调制器和I-Q解调器。 开关信号驱动时间共享混频器电路在两个输出信号之间交替。 第一输出信号表示具有给定信号输入的混频器的输出和具有第一相位的本地振荡器信号作为其本地振荡器输入。 第二输出信号表示具有相同输入信号的混频器的输出和具有与第一相位相差90度的第二相位的本地振荡器信号作为其本地振荡器输入信号。 变频器使用时间共享混频器与开关输出移相器组合，其切换与本地振荡器信号的相位同步，以产生相移输出信号，其中期望图像信号的时间平均值大大减少 到期望信号的时间平均值。 相移输出信号然后被带通放大器放大。 与其中一个混频器端口串联的时钟反相器通过消除对两个精确相移的本地振荡器信号的需要而提高了性能。

公开(公告)号：US5978206A

公开(公告)日：1999-11-02

申请号：US940847

申请日：1997-09-30

Applicant: Ken A. Nishimura ,  Scott D. Willingham ,  William J. McFarland

Inventor： Ken A. Nishimura ,  Scott D. Willingham ,  William J. McFarland

IPC: H01G4/33 ,  H01L21/02 ,  H01L21/822 ,  H01L23/522 ,  H01L27/04 ,  H01L27/08 ,  H01L29/92 ,  H01G4/005 ,  H01G4/228

CPC classification number: H01L27/0805 ,  H01L23/5223 ,  H01L28/82 ,  H01L2924/0002

Abstract: A capacitor that is adapted for construction over a substrate in the metal interconnect layers provided by conventional integrated circuit processes. The capacitor includes a first conducting layer separated from the substrate by a first dielectric layer and a second conducting layer separated from the first conduction layer by a second dielectric layer. The second conducting layer is divided into a plurality of electrically isolated conductors in an ordered array. Every other one of the conductors is connected to a first terminal, and the remaining conductors are connected to a second terminal. The first conducting layer includes at least one conductor which is connected to the first terminal. In one embodiment of the invention, the first conducting layer also includes a plurality of electrically isolated conductors in an ordered array, every other one of the conductors being connected to the first terminal and the remaining conductors being connected the second terminal.

Abstract translation: 适用于通过常规集成电路工艺提供的金属互连层中的衬底上的结构的电容器。 电容器包括通过第一电介质层与衬底分离的第一导电层和通过第二电介质层与第一导电层分离的第二导电层。 第二导电层被分成多个以有序阵列的电绝缘导体。 导体中的每一根连接到第一端子，其余的导体连接到第二端子。 第一导电层包括连接到第一端子的至少一个导体。 在本发明的一个实施例中，第一导电层还包括有序阵列中的多个电绝缘导体，每个导体中的每一个连接到第一端子，其余的导体与第二端子连接。

公开(公告)号：US09548832B1

公开(公告)日：2017-01-17

申请号：US12820058

申请日：2010-06-21

Applicant: James Cho ,  William J. McFarland ,  Ning Zhang

Inventor： James Cho ,  William J. McFarland ,  Ning Zhang

IPC: H04J3/06 ,  H04N21/43 ,  H04N21/4363

CPC classification number: H04W56/001 ,  H04J3/0661 ,  H04J3/0664 ,  H04J3/067 ,  H04N21/4305 ,  H04N21/43615 ,  H04N21/43637

Abstract: A system and method for closely synchronizing the transmission of real-time data streams is described. Synchronization data is transmitted by a cycle master for receipt by one or more cycle slaves. A cycle slave updates an internal state based on synchronization data received from the cycle master. This internal state may govern reproduction of received real-time data streams by the cycle slave. Such synchronization data may be inserted into transmitted media streams. The cycle slave internal state may be more accurately set by calculating timing differences between the cycle master and cycle slave and periodically adjusting that internal state between receipt of the synchronization data from the cycle master.

Abstract translation: 描述了用于紧密同步实时数据流的传输的系统和方法。 同步数据由循环主站传送，以便由一个或多个循环从站接收。 循环从站根据从循环主站接收的同步数据更新内部状态。 该内部状态可以管理由循环从站接收的实时数据流的再现。 这样的同步数据可以被插入到所传送的媒体流中。 循环从站内部状态可以通过计算循环主站和从站从站之间的定时差异并周期性地调整从循环主站接收到同步数据之间的内部状态来更精确地设置。

公开(公告)号：USRE45236E1

公开(公告)日：2014-11-11

申请号：US13231733

申请日：2011-09-13

Applicant: Paul J. Husted ,  William J. McFarland ,  Jeffrey M. Gilbert

Inventor： Paul J. Husted ,  William J. McFarland ,  Jeffrey M. Gilbert

IPC: H04J1/00

CPC classification number: H04W74/00 ,  H04L29/06 ,  H04L69/14 ,  H04W28/20

Abstract: A system and method are described for binding together a plurality of wireless data communications channels, whereby an aggregate throughput improvement is realized. A master channel amongst the channels to be bound is compatible with existing standards-based wireless data communications equipment. The master channel serves to perform MAC association and flow control. Aggregate throughput is improved by sending and receiving either multiple sets of separately encoded packets, commonly encoded packets or redundantly encoded packets.

Abstract translation: 描述了用于将多个无线数据通信信道绑定在一起的系统和方法，从而实现了聚合吞吐量的提高。 要绑定的频道中的主频道与现有的基于标准的无线数据通信设备兼容。 主信道用于执行MAC关联和流控制。 通过发送和接收多组单独编码的数据包（通常是编码数据包或冗余编码数据包）来提高总体吞吐量。

公开(公告)号：US08755756B1

公开(公告)日：2014-06-17

申请号：US12769536

申请日：2010-04-28

Applicant: Ning Zhang ,  David Kuochieh Su ,  William J. McFarland ,  Chin-Hung Chen

Inventor： Ning Zhang ,  David Kuochieh Su ,  William J. McFarland ,  Chin-Hung Chen

IPC: H04B1/04

CPC classification number: H04B1/109 ,  H04B1/525

Abstract: Various methods and corresponding active interference cancellation units are described. These methods and units can perform active interference cancellation in a system including multiple radios. Notably, signals from a first radio can be received as interference at a second radio. The described methods and units can provide interference conditioning, which manipulates an interference reference of the interference at the first radio to approximate an interference observed at the second radio. After tuning of the interference conditioning, the interference can be removed.

Abstract translation: 描述各种方法和相应的主动干扰消除单元。 这些方法和单元可以在包括多个无线电的系统中执行主动干扰消除。 值得注意的是，来自第一无线电的信号可以作为第二无线电的干扰被接收。 所描述的方法和单元可以提供干扰调节，其处理在第一无线电处的干扰的干扰参考以近似在第二无线电处观察到的干扰。 在调谐干扰调节之后，可以去除干扰。

公开(公告)号：US07688864B2

公开(公告)日：2010-03-30

申请号：US11601535

申请日：2006-11-17

Applicant: Chaohuang Zeng ,  William J. McFarland

Inventor： Chaohuang Zeng ,  William J. McFarland

IPC: H04L12/56 ,  H04J1/16

CPC classification number: H04W56/0085 ,  H04L7/042 ,  H04L69/22 ,  H04W24/00

Abstract: A system and method are disclosed for dynamic preamble detection. A subset of the bits comprising the synchronization portion of the preamble are decoded, de-scrambled, and analyzed to determine dynamically which preamble format is being used. The source data values for the synchronization bits for a first preamble format are different than the source data values for the synchronization bits for a second preamble format and the receiving system uses the difference to determine which preamble format has been used. The information concerning which format has been used may be used to extend a synchronization operation.

Abstract translation: 公开了用于动态前导码检测的系统和方法。 包括前导码的同步部分的位的子集被解码，去加扰和分析，以动态地确定正在使用哪个前导码格式。 用于第一前同步码格式的同步位的源数据值与用于第二前同步码格式的同步位的源数据值不同，并且接收系统使用该差来确定已经使用哪个前导码格式。 可以使用关于使用哪种格式的信息来扩展同步操作。

公开(公告)号：US07643810B2

公开(公告)日：2010-01-05

申请号：US11766060

申请日：2007-06-20

Applicant: Paul J. Husted ,  William J. McFarland

Inventor： Paul J. Husted ,  William J. McFarland

IPC: H04B17/00

CPC classification number: H03G3/3078 ,  H03G3/3068 ,  H04B17/345

Abstract: A system for detecting the level of the noise floor due to circuit noise as seen at the ADC for a wireless receiver. The system measures power after digitizing and filtering, and subtracts off any variable gain used in the analog front end to determine differentially the size of the signal at the antenna. The system further differentially detects the signal size of any incoming signal at the antenna in a similar fashion, and determines its size relative to the measured noise floor. If the level of the circuit noise of the receiver is known absolutely, the absolute signal size of the incoming signal can likewise be determined with this inventive method and system.

Abstract translation: 一种用于在无线接收机的ADC处检测由于电路噪声导致的本底噪声电平的系统。 该系统在数字化和滤波后测量功率，并减去模拟前端中使用的任何可变增益，以区分天线信号的大小。 该系统以类似的方式进一步差分地检测天线处的任何进入信号的信号大小，并且确定其相对于测量的本底噪声的大小。 如果接收机的电路噪声的电平绝对已知，则输入信号的绝对信号大小同样可以利用本发明的方法和系统来确定。

公开(公告)号：US07529309B2

公开(公告)日：2009-05-05

申请号：US11937471

申请日：2007-11-08

Applicant: William J. McFarland

Inventor： William J. McFarland

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04W28/0231 ,  H04L1/0002 ,  H04L1/0017 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/20 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L25/0224 ,  H04L25/08 ,  H04L27/2602 ,  H04L27/2608 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2628

Abstract: A multi-carrier communication system such as an OFDM or DMT system has nodes which are allowed to dynamically change their receive and transmit symbol rates, and the number of carriers within their signals. Changing of the symbol rate is done by changing the clocking frequency of the nodes' iFFT and FFT processors, as well as their serializers and deserializers. The nodes have several ways of dynamically changing the number of earners used. The selection of symbol rate and number of earners can be optimized for a given channel based on explicit channel measurements, a priori knowledge of the channel, or past experience. Provision is made for accommodating legacy nodes that may have constraints in symbol rate or the number of carriers they can support. The receiver can determine the correct symbol rate and number of earners through a priori knowledge, a first exchange of packets in a base mode that all nodes can understand, or an indication in the header of the data packet which is transmitted in a base mode of operation that all nodes can understand.

Abstract translation: 诸如OFDM或DMT系统的多载波通信系统具有被允许动态地改变其接收和发送符号率的节点以及它们的信号内的载波数量。 通过改变节点iFFT和FFT处理器的时钟频率，以及它们的串行器和解串器来改变符号速率。 这些节点有几种动态改变所使用的收入人数的方法。 可以根据明确的渠道测量，渠道的先验知识或过去的经验，为特定频道优化符号率和收入人数的选择。 规定了用于容纳可能具有符号率限制或可支持的运营商数量的传统节点。 接收机可以通过先验知识确定正确的符号速率和收入者数量，以所有节点可以理解的基本模式的分组的第一次交换，或以基本模式发送的数据分组头部中的指示 所有节点都可以理解的操作。

公开(公告)号：US07245882B1

公开(公告)日：2007-07-17

申请号：US10621687

申请日：2003-07-17

Applicant: William J. McFarland

Inventor： William J. McFarland

IPC: H04B7/08 ,  H04B17/02

CPC classification number: H04W74/08 ,  H04B1/18 ,  H04W72/04

Abstract: Method and apparatus to dynamically configure the signal reception selectivity of a plurality of transceivers is described. In one embodiment, a transceiver includes a receiver circuit having two or more filter circuits. Each of the filter circuits is configured to pass RF signals from a different portion of an overall receiver bandwidth. When two or more receivers in proximity to one another are simultaneously operating, the filter circuits of the respective receiver are dynamically configured to different RF frequency passbands to minimize interference and cross talk between receivers and transmitters.

Abstract translation: 描述了动态地配置多个收发器的信号接收选择性的方法和装置。 在一个实施例中，收发器包括具有两个或更多个滤波器电路的接收器电路。 每个滤波器电路被配置为从整个接收机带宽的不同部分传递RF信号。 当彼此接近的两个或多个接收器同时工作时，相应接收机的滤波器电路被动态地配置成不同的RF频率通带，以最小化接收机和发射机之间的干扰和串扰。