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57 条记录 (耗时 0.011 秒)

    FREQUENCY SHIFT KEYING MODULATION AND DEMODULATION
    1.
    发明公开
    FREQUENCY SHIFT KEYING MODULATION AND DEMODULATION 无效

    公开(公告)号：EP2771975A4

    公开(公告)日：2018-03-21

    申请号：EP11767363

    申请日：2011-03-19

    申请人： MACTEK CORP

    发明人： BURNS KENNETH ,  MALECEK KENNETH

    IPC分类号： H03K9/00 ,  H03K9/06

    CPC分类号： H04L27/10 ,  H03K7/06 ,  H03K9/06

    摘要： A communications adaptor comprises a receiver circuit, which can comprise a signal input configured to receive a frequency shift keyed (FSK) signal; a delay circuit in communication with the signal input and including a delayed signal output; a multiplier circuit in communication with the signal input and the delayed signal output, and the multiplier circuit can be configured to produce a serial bit steam from at least the signal input and the delayed signal output, the serial bit stream corresponds to one or more bits encoded with frequency shift keying in the FSK signal; and a signal output configured to output the serial bit stream. The communications adaptor also can comprise a transmitter circuit and a processor in communication with the receiver circuit and the transmitter circuit.

    METHOD AND SYSTEM FOR INTEGRATING AN RF MODULE INTO A DIGITAL NETWORK ACCESS POINT
    2.
    发明公开
    METHOD AND SYSTEM FOR INTEGRATING AN RF MODULE INTO A DIGITAL NETWORK ACCESS POINT 审中-公开
    方法和系统射频模块在数字网络中，ZUGANSGPUNKT集成

    公开(公告)号：EP2504922A4

    公开(公告)日：2015-07-22

    申请号：EP10833952

    申请日：2010-11-24

    申请人： MOBILEACCESS NETWORKS LTD

    发明人： SABAN OFER ,  SHAPIRA ISAAC ,  HAZANI AMI ,  ATIAS NISSIM ,  BEN SHLOMO DROR

    IPC分类号： H03K9/00

    CPC分类号： H04W88/085

    摘要： The invention is directed to a method and system for supporting wireless RF services over a wired digital data network infrastructure, such as an Ethernet network. The system includes a control unit that can be connected to a base station that supports one or more wireless RF services. The control unit converts the wireless RF signals to an intermediate frequency (IF) that does not interfere with the data network signals and combines the IF signals onto the cable run to a remote network device on the digital data network. The remote network device includes a multiplexer or a low pass filter and a high pass filter that separates the IF signals from the digital data signals on the downlink and combines the IF signals with digital data signals on the uplink over the cable run. The IF signals can be input to an RF module connected to the remote network device which converts the IF signals back to the original RF signals for transmission by a transceiver to wireless devices. Similarly, on the uplink, RF signals received from the wireless devices through the transceiver can be converted to IF for transmission over the cable run to the base station. In one conventional data network each cable run includes 4 pair of conductors and each pair can be used to carry a different IF frequency band. In addition, each pair can be configured to carry more than one IF frequency band using FDD or TDD. Additional signaling channels, such as for management signaling can be provided using differential signaling between 2 pair of conductors. The filters can be implemented using various technologies, including silicon, LTCC and discrete components and active filters can be provided to allow for configuring and tuning of performance in the field.

    DIGITAL RF TRANSCEIVER WITH MULTIPLE IMAGING MODES
    6.
    发明授权
    DIGITAL RF TRANSCEIVER WITH MULTIPLE IMAGING MODES 有权
    数字RF发射器/通过多模式画面接收机

    公开(公告)号：EP1665533B1

    公开(公告)日：2008-08-20

    申请号：EP03754845.0

    申请日：2003-09-25

    申请人： Thomson Licensing

    发明人： MCNEELY, David, Lowell

    IPC分类号： H03K9/00 ,  H04L27/06

    CPC分类号： H03C3/40 ,  H04L27/2647

    摘要： The disclosed embodiments relate to a digital radio frequency (RF) circuit (100) that creates a signal in a desired range in a frequency spectrum. The RF circuit (100) comprises circuitry (104) that produces a first sample data modulated signal (105) having a first frequency and a first sample data clock rate. An up-sampler modulator (108) receives the first sample data modulated signal and produces a second sample data modulated signal (109) having a second frequency and a second sample data clock rate. The RF circuit (100) may also comprise circuitry (112) that receives the first sample data modulated signal and the second sample data modulated signal and delivers one of the first sample data modulated signal (105) and the second sample data modulated signal (109) for further processing depending on which sample data modulated signal exhibits desirable characteristics for a given operating environment.

    ADJACENT CHANNEL INTERFERENCE MITIGATION FOR FM DIGITAL AUDIO BROADCASTING RECEIVERS
    8.
    发明公开
    ADJACENT CHANNEL INTERFERENCE MITIGATION FOR FM DIGITAL AUDIO BROADCASTING RECEIVERS 审中-公开
    干扰缓解相邻信道之间的数字音频FM无线电接收器

    公开(公告)号：EP1500195A1

    公开(公告)日：2005-01-26

    申请号：EP03718466.0

    申请日：2003-04-21

    申请人： IBIQUITY DIGITAL CORPORATION

    发明人： KROEGER, Brian, W.

    IPC分类号： H03K9/00 ,  H04B17/02

    CPC分类号： H04H60/11 ,  H04H20/30 ,  H04H2201/183 ,  H04H2201/20

    摘要： A method of receiving an FM digital audio broadcasting signal including a first plurality of sub-carriers in a lower sideband of the radio channel comprises the steps of mixing the digital audio broadcasting signal with a local oscillator signal (112) to produce an intermediate frequency signal (114) through a bandpass filter (116) to produce a filter signal, determining if one of the upper and lower sidebands of the digital audio broadcasting signal is corrupted, and adjusting the local frequency oscillator signal (112) to change the frequency of the intermediate frequency (114) signal such that the bandpass filter (116) removes the sub-carriers in the upper or lower sideband that has been corrupted. A receiver that processes a digital audio broadcasting signal in accordance with the method is also provided.

    Digital demodulator for phase shift keyed signals
    9.
    发明公开
    Digital demodulator for phase shift keyed signals 失效
    对于相移的数字解调器键控信号。

    公开(公告)号：EP0008491A1

    公开(公告)日：1980-03-05

    申请号：EP79301325.1

    申请日：1979-07-09

    申请人： MOTOROLA, INC.

    发明人： Levine, Stephen Norman

    IPC分类号： H04L27/22 ,  H03D3/00 ,  H03K9/00

    CPC分类号： H04L27/2337

    摘要： A digital demodulator for differential phase shift keyed ( PSK) signals (154) includes two pairs of 1-bit integrators (105, 106 and 107, 108) for continuously taking the phase difference between successive DPSK bits. Each DPSK bit is subdivided (100) into a plurality of bits, for example 15 bits. A weighted output signal having 4 bits is provided by each 1-bit integrator for each of the bits corresponding to a DPSK bit. The weighted output signals from each pair of 1-bit integrators are sine weighted and multiplied (118). The products are then added (120) together for application to a comparator (121). The comparator (121) compares the sum of the addition to a predetermined reference signal and provides a demodulated digital signal (155) having a logical state dependent on whether the sum is greater or smaller than the predetermined reference.

    Wireless communication method and apparatus for performing post-detection constellation correction
    10.
    发明公开
    Wireless communication method and apparatus for performing post-detection constellation correction 审中-公开
    一种用于无线通信的方法和装置来执行检测后星座校正

    公开(公告)号：EP1993208A1

    公开(公告)日：2008-11-19

    申请号：EP08163949.4

    申请日：2004-11-05

    申请人： INTERDIGITAL TECHNOLOGY CORPORATION

    发明人： Pietraski, Philip J.

    IPC分类号： H03K9/00 ,  H03D1/00 ,  H04L27/08 ,  H04L25/06 ,  H04L27/00 ,  H04L27/38

    CPC分类号： H04L27/3863 ,  H04L27/3809 ,  H04L27/3872

    摘要： A method and apparatus for correcting the phase and gain of data associated with a constellation pattern of a plurality of received individual symbols. Each symbol is divided into real and imaginary symbol components. The signs of the real and imaginary symbol components of each symbol are determined and used as a basis for determining wheiher the symbol is associated with a or third quadrant of the constellation pattern or a second or fourth quadrant of the constellation pattern. The absolute values of the real and imaginary symbol components are determined and used to create a first sum and a second sum. A phase adjustment value θ and a gain adjustment value G are derived from the first and second sums, and are used to create a complex number. Each of the received individual symbols is multiplied by the created complex number to provide corrected constellation pattern data.

    摘要翻译： 一种用于校正的相位和与所接收的单个符号的多个星座图案相关联的数据的增益的方法和装置。 每个符号分为实及虚符号组成。 每个符号的实部和虚符号组成的符号是确定性的开采和用作确定性采矿wheiher符号与第三或象限的星座图案或者星座图案的第二或第四象限相关联的基础。 实部和虚符号组成的绝对值是确定性的开采和用于创建第一总和与第二总和。 一个相位调整值和¸增益调整值G从第一和第二总和导出的，并且被用于产生一个复数。 所接收的单独符号中的每一个，乘以所生成的复数，以提供校正的星座图案数据。