FREQUENCY MODULATION TRACKING FOR BAND REJECTION TO REDUCE DYNAMIC RANGE

    公开(公告)号:WO2022245626A1

    公开(公告)日:2022-11-24

    申请号:PCT/US2022/028938

    申请日:2022-05-12

    Abstract: A method for reducing a dynamic range of a received radio frequency signal includes receiving digital IQ signals corresponding to an in-phase component of the received radio frequency signal and a quadrature component of the received radio frequency signal. The method includes demodulating the digital IQ signals to generate an instantaneous frequency signal. The method includes selecting a center frequency of a selectable filter according to whether an interfering signal is detected in a target frequency band of the received radio frequency signal. The center frequency is selected from a predetermined frequency and an estimated center frequency determined using the instantaneous frequency signal. The method includes filtering the digital IQ signals using the selectable filter configured using the center frequency to generate output digital IQ signals.

    一种基于M-FSK调制的接收机及其接收方法

    公开(公告)号:WO2022213764A1

    公开(公告)日:2022-10-13

    申请号:PCT/CN2022/079933

    申请日:2022-03-09

    Inventor: 郑德来 李卓群

    Abstract: 本申请公开一种基于M-FSK调制的接收机及其接收方法。所述方法包括对包括Preamble帧、SYNC帧和Data帧的帧结构进行M-FSK解调,具体包括:采用自相关的时频同步技术进行重复序列Preamble帧的M-FSK解调;采用互相关滑动FFT的时频同步技术进行非重复序列Preamble帧的M-FSK解调;采用自适应可扩展FFT的M-FSK数据解调技术进行SYNC帧和Data帧的M-FSK解调。采用本申请技术方案,使基于Advanced M-FSK达到较低的灵敏度,同时适应各种多径和Doppler场景。

    APPARATUS AND METHOD
    3.
    发明申请

    公开(公告)号:WO2022129880A1

    公开(公告)日:2022-06-23

    申请号:PCT/GB2021/053263

    申请日:2021-12-13

    Abstract: Apparatus for downconverting a received frequency modulated communication signal is provided. The apparatus comprises processing circuitry to: obtain first digital frequency domain data based on the received frequency modulated communication signal; process the first digital frequency domain data in the frequency domain to provide downconverted digital frequency domain data, wherein the processing is to comprise frequency shifting data based on at least a portion of the first digital frequency domain data, wherein the downconverted digital frequency domain data has fewer data points than the first digital frequency domain data; and convert the downconverted digital frequency domain data into the time domain.

    車両制御装置
    4.
    发明申请
    車両制御装置 审中-公开

    公开(公告)号:WO2020066799A1

    公开(公告)日:2020-04-02

    申请号:PCT/JP2019/036605

    申请日:2019-09-18

    Inventor: 梅垣 宜夫

    Abstract: 車両制御装置(10;10a)は、車両(100)に搭載されているアンテナ(21)により受信されて符号化された受信信号が、携帯機(200)から送信された無線信号である正規無線信号であるか否かを判定する判定処理を含む第1処理を実行する第1処理部(111:130)を備える。受信信号は、連続する2つの短ビットで0を表し、1つの長ビットで1を表す予め定められた符号化方式により符号化されている。判定処理は、前記受信信号において隣り合う2つの長ビットで挟まれた短ビットの数が、偶数個の場合に前記受信信号は前記正規無線信号であると判定し、奇数個の場合に前記受信信号は前記正規無線信号でないと判定する第1副判定処理を含む。

    DSP-FREE COHERENT RECEIVER
    6.
    发明申请

    公开(公告)号:WO2018213251A1

    公开(公告)日:2018-11-22

    申请号:PCT/US2018/032672

    申请日:2018-05-15

    CPC classification number: H04L27/227 H04B10/6151 H04L27/0014 H04L27/14

    Abstract: Disclosed are systems, methods, and structures for DSP-free coherent receiver architectures applicable for short-reach optical links. Operationally, a received optical signal is down-converted by mixing it with a local oscillator (LO) laser signal using a 90-degree hybrid followed by balanced photodiodes. Other receiver functions are performed using analog signal processing thereby avoiding power-hungry, high-speed analog-to-digital converters and high-speed digital signal processing. Carrier phase recovery is performed by an electrical phase-locked loop employing a multiplier-free phase estimator stage that - while designed for quaternary phase-shift keying signals - may be employed in designs exhibiting higher modulation formats. Since carrier phase recovery is performed in the electrical domain, LO laser frequency modulation or LO laser integration is not employed. Polarization demultiplexing - if employed - may be performed by the addition of an optical polarization controller prior to the hybrid and may advantageously be realized by cascading multiple phase shifters driven by low- speed circuitry.

    DIVERSITY RECEIVER
    7.
    发明申请
    DIVERSITY RECEIVER 审中-公开
    多样性接收者

    公开(公告)号:WO2017196497A1

    公开(公告)日:2017-11-16

    申请号:PCT/US2017/027804

    申请日:2017-04-14

    Abstract: A diversity receiver synchronizes and mixes multiple input signals. In one embodiment, the receiver demodulates the multiple input signals prior to synchronizing, converts the demodulated multiple input signals from analog signals to digital signals, synchronizes the demodulated digital signals, converts the synchronized demodulated digital signals to analog signals and mixes the synchronized demodulated analog signals based on a characteristic of the input signals existing prior to the demodulating.

    Abstract translation: 分集接收机同步并混合多个输入信号。 在一个实施例中,接收器在同步之前解调多个输入信号,将解调的多个输​​入信号从模拟信号转换为数字信号,同步解调的数字信号,将同步的解调数字信号转换为模拟信号并混合同步的解调模拟信号 基于在解调之前存在的输入信号的特性。

    MULTI-MODULATION RECEIVER, TRANSMITTERS AND METHODS FOR HANDLING MULTI-MODULATION IN WIRELESS COMMUNICATION SYSTEMS
    8.
    发明申请
    MULTI-MODULATION RECEIVER, TRANSMITTERS AND METHODS FOR HANDLING MULTI-MODULATION IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
    无线通信系统中的多调制接收器,发送器和用于处理多调制的方法

    公开(公告)号:WO2017167380A1

    公开(公告)日:2017-10-05

    申请号:PCT/EP2016/057102

    申请日:2016-03-31

    Abstract: The disclosure relates to a multi-modulation receiver (50) configured to receive a multicarrier signal comprising data transmitted from multiple transmitters; wherein at least one of the transmitters is a transmitter using a modulation scheme other than Orthogonal Frequency- Division Multiplexing, OFDM, and wherein data transmitted from different transmitters are mapped to different subcarriers in the frequency domain. The multi-modulation receiver (50) comprises a radio unit (51) configured to receive the multicarrier signal. The multi- modulation receiver (50) also comprises a cyclic prefix unit (53) configured to remove a Cyclic Prefix, CP, from the received multicarrier signal. The multi-modulation receiver (50) comprises additionally comprises a Fast Fourier Transform, FFT, unit (55) configured to separate data received from the individual transmitters into mutually orthogonal subcarriers by transforming the multicarrier signal in the time domain to multiple orthogonal subcarrier signals in the frequency domain. The multi-modulation receiver (50) further comprises a demapping unit (57) configured to, for each of the multiple transmitters, demap the corresponding subcarrier signals in accordance with the modulation scheme of the respective transmitter. The disclosure also relates to corresponding methods and to a receiver for receiving data transmitted by the multi-modulation transmitter.

    Abstract translation: 本公开涉及一种多调制接收机(50),其被配置为接收包括从多个发射机发送的数据的多载波信号; 其中至少一个发射机是使用除了正交频分复用OFDM以外的调制方案的发射机,并且其中从不同发射机发射的数据被映射到频域中的不同副载波。 多调制接收机(50)包括被配置为接收多载波信号的无线电单元(51)。 多调制接收机(50)还包括配置成从接收到的多载波信号中去除循环前缀CP的循环前缀单元(53)。 多调制接收机(50)还包括快速傅立叶变换FFT单元(55),其被配置为通过将时域中的多载波信号变换为多个正交子载波信号,将从各个发射机接收的数据分离成相互正交的子载波 频域。 多调制接收机(50)还包括解映射单元(57),该解映射单元被配置为针对多个发射机中的每个发射机根据相应发射机的调制方案对对应的副载波信号进行解映射。 本公开还涉及用于接收由多调制发射机发送的数据的相应方法和接收机。

    FM受信装置、FM受信方法
    9.
    发明申请
    FM受信装置、FM受信方法 审中-公开
    FM接收设备和FM接收方法

    公开(公告)号:WO2016136039A1

    公开(公告)日:2016-09-01

    申请号:PCT/JP2015/081362

    申请日:2015-11-06

    Inventor: 奥畑 康秀

    CPC classification number: H04B1/10 H04B1/16 H04B1/26 H04B1/30 H04L27/142

    Abstract:  第1ローカル発振器90は、所定の周波数の変調信号を生成する。第2ローカル発振器92は、第1ローカル発振器90からの変調信号によって周波数変調されたローカル発振信号を出力する。直交検波部12は、第2ローカル発振器92から出力されたローカル発振信号によって、FM信号を直交検波してベースバンド信号を出力する。第1低減部30、第2低減部32は、ベースバンド信号に含まれた直流成分を低減する。補正部34は、ベースバンド信号を、IQ平面上において極座標の原点を中心とするように補正することにより直流成分を再生する。FM検波部24は、補正したベースバンド信号をFM検波して、検波信号を生成する。

    Abstract translation: 根据本发明,第一本地振荡器90产生规定频率的调制信号。 第二本地振荡器92输出由来自第一本地振荡器90的调制信号进行了频率调制的本地振荡信号。正交检测单元12借助于从第二本地振荡器输出的本地振荡信号对FM信号进行正交检测 振荡器92,并输出基带信号。 第一缩小单元30和第二缩小单元32减少包括在基带信号中的DC分量。 校正单元34通过校正基带信号以在IQ平面上的极坐标的原点为中心来再现DC分量。 FM检测单元24对校正的基带信号进行FM检测,并生成检测信号。

    相位校准方法和装置
    10.
    发明申请

    公开(公告)号:WO2016078040A1

    公开(公告)日:2016-05-26

    申请号:PCT/CN2014/091673

    申请日:2014-11-19

    Inventor: 马骏 骆彦行

    CPC classification number: H04L27/20 H01Q3/30 H04B17/12 H04L5/0048 H04L27/14

    Abstract: 本发明实施例提供一种相位校准方法和装置,其中,该装置包括:第一鉴相器,与所述第一鉴相器连接的移相控制器件;所述第一鉴相器,用于获取N个第一信号,以及将所述N个第一信号与参考信号进行比较,获得所述参考信号与所述N个第一信号中各个第一信号之间的相位差,并输出至所述移相控制器件,所述N为大于或等于2的整数,所述N个第一信号分别为经过N个移相器移相后的信号,所述参考信号的载波频率与所述N个第一信号的载波频率相同;所述移相控制器件,用于根据所述N个相位差一一对应地调整所述N个移相器的移相相位。从而无需反馈通道,也不受信道干扰的影响,提高了获取的各个移相器的初始相位校准值的准确性。

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