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公开(公告)号：US12119900B2
公开(公告)日：2024-10-15
申请号：US18110543
申请日：2023-02-16
Inventor： Yutaka Murakami , Hiroyuki Motozuka
IPC: H04B7/0456 , H04B1/04 , H04L27/20
CPC classification number: H04B7/0456 , H04B1/0475 , H04L27/206
Abstract: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. The weighting synthesizer performs, in the precoding process, a calculation that uses
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on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.
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公开(公告)号：US11848810B2
公开(公告)日：2023-12-19
申请号：US17456024
申请日：2021-11-22
Applicant: Cohere Technologies, Inc.
Inventor： Seshadri Sathyanarayan , Shlomo Selim Rakib
IPC: H04L5/00 , H04L27/00 , H04L27/26 , H04B1/3827 , H04L27/20
CPC classification number: H04L27/26532 , H04B1/385 , H04L5/0007 , H04L5/0053 , H04L27/0008 , H04L27/206 , H04L27/2602 , H04L27/2636 , H04L27/2647 , H04L5/0044 , H04L27/26526
Abstract: Device, methods and systems for implementing aspects of orthogonal time frequency space (OTFS) modulation in wireless systems are described. In an aspect, the device may include a surface of an object for receiving an electromagnetic signal. The surface may be structured to perform a non-electrical function for the object. The surface may generate an electrical signal from an electromagnetic signal. The electromagnetic signal may be received from a transmitter. The transmitter may map digital data to a digital amplitude modulation constellation in a time-frequency space. The digital amplitude modulation constellation may be mapped to a delay-Doppler domain and the transmitter may transmit to the surface according to an orthogonal time frequency space modulation signal scheme. The apparatus may further include a demodulator to demodulate the electrical signal to determine digital data.
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3.发明申请
公开(公告)号：US20190222447A1
公开(公告)日：2019-07-18
申请号：US16249217
申请日：2019-01-16
Applicant: SIERRA WIRELESS, INC.
Inventor： Gustav Gerald Vos , Steven John Bennett
CPC classification number: H04L27/2082 , H04L5/0051 , H04L27/206 , H04L27/2607 , H04L27/2636 , H04L27/3411
Abstract: The present invention provides methods and apparatuses for implementation of cyclic prefix (CP) and demodulation reference signal (DMRS) in 2 sub-carrier pi/2 binary phase shift keying (BPSK) modulation in a communication system. DMRS symbols are interleaved with data-carrying symbols and configured such that they are alternatingly transmitted on different ones of the two sub-carriers. When a DMRS symbol is transmitted on one sub-carrier, the other sub-carrier may be unused. In implementing CP, phase rotations may be applied to modulation symbols, such that each concurrently transmitted pair of symbols is subjected to a same phase rotation. The phase rotation can be derived based on an average frequency of the two (e.g. adjacent) sub-carriers in use. The phase rotations can be updated recursively, and the update multiplied by a scaling factor.
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公开(公告)号：US20190158339A1
公开(公告)日：2019-05-23
申请号：US16193939
申请日：2018-11-16
Applicant: QUALCOMM Incorporated
Inventor： Seyong PARK , Yi HUANG , Peter GAAL , Renqiu WANG , Xiao Feng WANG , Sony AKKARAKARAN , Timo Ville VINTOLA , Tao LUO , Wei YANG
CPC classification number: H04L27/3411 , H04J13/0022 , H04J13/0029 , H04L27/206 , H04L27/2613 , H04L27/2636 , H04L27/3444
Abstract: Various aspects directed towards generating a reference signal for pi/2-binary phase shift keying (BPSK) modulation are disclosed. In an example, a pi/2-BPSK sequence is selected from a plurality of candidate sequences. A reference signal is then generated based on the selected pi/2-BPSK sequence such that the reference signal is associated with a transmission of data modulated according to a t/2-BPSK modulation.
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公开(公告)号：US09800272B2
公开(公告)日：2017-10-24
申请号：US14136156
申请日：2013-12-20
Applicant: Texas Instruments Incorporated
Inventor： Rahmi Hezar , Lei Ding , Joonhoi Hur
CPC classification number: H04B1/04 , H03F1/0294 , H03F3/2175 , H03F3/24 , H04L27/206 , H04L27/2602
Abstract: For generating quantized signals, a quantized phase domain related to quantized phases of an input signal is generated. Vectors that the input signal may occupy are calculated based on the quantized phase domain. A first quantized phase of a first component of the input signal is generated per the quantized phase domain, and a second quantized phase of a second component of the input signal is generated per the quantized phase domain.
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6.发明申请TRANSMISSION APPARATUS, RECEPTION APPARATUS AND DIGITAL RADIO COMMUNICATION METHOD 审中-公开传输装置，接收装置和数字无线电通信方法
公开(公告)号：US20170078123A1
公开(公告)日：2017-03-16
申请号：US15363162
申请日：2016-11-29
Applicant: Wi-Fi One, LLC
Inventor： Yutaka MURAKAMI , Shinichiro TAKABAYASHI , Masayuki ORIHASHI , Akihiko MATSUOKA
CPC classification number: H04L27/12 , H04B1/38 , H04L1/0003 , H04L1/0006 , H04L27/206 , H04L27/34 , H04L27/3455
Abstract: A transmission apparatus and method include modulating a transmission signal using a first modulation scheme selected from a plurality of modulation schemes to generate a first symbol sequence. A second symbol, generated using a phase shift keying (PSK) modulation scheme, is inserted in the first symbol sequence to generate a first modulation signal for transmission. A second modulation signal is received that includes a third symbol generated using a PSK modulation scheme and inserted in a second symbol sequence generated using a second modulation scheme selected from the plurality of modulation schemes. The third symbol is extracted from the received modulation signal. A transmission path associated with the received modulation signal is estimated using the third symbol. A received data signal from the second symbol sequence included in the received modulation signal is output using the estimated transmission path.
Abstract translation: 发送装置和方法包括使用从多个调制方案中选择的第一调制方案来调制发送信号，以生成第一符号序列。 使用相移键控（PSK）调制方案产生的第二符号被插入到第一符号序列中，以产生用于传输的第一调制信号。 接收第二调制信号，该第二调制信号包括使用PSK调制方案产生的第三符号，并插入到使用从多个调制方案中选择的第二调制方案产生的第二符号序列中。 从接收到的调制信号中提取第三符号。 使用第三符号来估计与接收的调制信号相关联的传输路径。 使用估计的传输路径输出来自包含在所接收的调制信号中的第二符号序列的接收数据信号。
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公开(公告)号：US09356646B2
公开(公告)日：2016-05-31
申请号：US14731226
申请日：2015-06-04
Applicant: Digi International Inc.
Inventor： Terry Michael Schaffner
CPC classification number: H04N19/156 , H04B1/69 , H04B2001/6912 , H04L27/206 , H04L27/2628 , H04N19/15 , H04N19/176
Abstract: A radio frequency receiver for receiving an interleaved single carrier chirp spread spectrum signal based on a chirp sequence includes: a demodulator configured to receive, demodulate, and digitize a modulated radio frequency (RF) signal to form a digital baseband signal; and a signal decoder configured to: despread the digital baseband signal by at least: buffering signal data into blocks of L samples; multiplying the blocks of data with a conjugate of the chirp sequence to form a result; and performing a Fast Fourier Transform (FFT) on the result; equalize data from the FFT to form N data values, where N is the number of subchannels; transform the N data values into N demodulation symbols via an N-point inverse Fourier transform; and decode the demodulation symbols to form codec symbols.
Abstract translation: 一种用于基于啁啾序列接收交错单载波啁啾扩频信号的射频接收机，包括：解调器，被配置为接收，解调和数字化调制射频（RF）信号以形成数字基带信号; 以及信号解码器，其被配置为：至少将所述数字基带信号解扩展：将信号数据缓冲为L个采样块; 将数据块与啁啾序列的共轭相乘以形成结果; 并对结果执行快速傅里叶变换（FFT）; 对来自FFT的数据进行均衡以形成N个数据值，其中N是子信道数; 通过N点逆傅里叶变换将N个数据值变换成N个解调符号; 并解码解调符号以形成编解码器符号。
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公开(公告)号：US20160126894A1
公开(公告)日：2016-05-05
申请号：US14576013
申请日：2014-12-18
Applicant: QUALCOMM Incorporated
Inventor： Hasnain Mohammedi Lakdawala , Bin Fan , Ojas Mahendra Choksi
CPC classification number: H03D7/1441 , H03D3/009 , H03D7/1458 , H03D7/1466 , H03D7/165 , H04B1/40 , H04L27/206 , H04L27/2089
Abstract: Performing quadrature combining and adjusting including: a plurality of mixing circuits configured to generate a plurality of frequency converted signals; at least one mixing circuit of the plurality of mixing circuits is configured with a plurality of paths, each path representing one linearity mode; and a plurality of combining circuits configured to combine the plurality of frequency converted signals to generate a differential baseband output signal.
Abstract translation: 执行正交组合和调整包括：多个混合电路，被配置为产生多个频率转换信号; 多个混合电路中的至少一个混频电路配置有多个路径，每个路径表示一个线性模式; 以及多个组合电路，被配置为组合多个频率转换信号以产生差分基带输出信号。
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公开(公告)号：US09184974B1
公开(公告)日：2015-11-10
申请号：US14316112
申请日：2014-06-26
Applicant: The Boeing Company
Inventor： Cynthia D. Baringer , Donald A. Hitko
CPC classification number: H04L27/362 , H03M1/0648 , H03M1/74 , H04L27/206 , H04L27/2637
Abstract: Disclosed herein is an apparatus for radio frequency digital-to-analog conversion of in-phase and quadrature bit streams. The apparatus may include a plurality of in-phase multiplying cells that receive an in-phase local oscillator signal and a plurality of in-phase bits, a plurality of quadrature multiplying cells that receive a quadrature local oscillator signal and a plurality of quadrature bits, a first output line connected to a first set of the plurality of in-phase multiplying cells and a first set of the plurality of quadrature multiplying cells, and a second output line connected to a second set of the plurality of in-phase multiplying cells and a second set of the plurality of quadrature multiplying cells. Each multiplying cell produces an output signal based on a received input bit. The output signals from each multiplying cell combine in phase on the connected output line.
Abstract translation: 本文公开了一种用于同相和正交比特流的射频数模转换的装置。 该装置可以包括接收同相本地振荡器信号和多个同相位的多个同相乘法单元，接收正交本地振荡器信号和多个正交位的多个正交乘法单元， 连接到所述多个同相乘法单元的第一组的第一输出线和所述多个正交乘法单元的第一组，以及连接到所述多个同相乘法单元的第二组的第二输出线，以及 所述多个正交倍增单元的第二组。 每个乘法单元基于接收的输入位产生输出信号。 来自每个乘法单元的输出信号在连接的输出线上同相组合。
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10.发明授权Method and system for power supply adjustment and polar modulation in a MIMO system 有权MIMO系统中电源调整和极坐标调制的方法和系统
公开(公告)号：US08995567B2
公开(公告)日：2015-03-31
申请号：US11876037
申请日：2007-10-22
Applicant: Ahmadreza Rofougaran , Maryam Rofougaran
Inventor： Ahmadreza Rofougaran , Maryam Rofougaran
CPC classification number: H04W52/42 , H03C5/00 , H04B7/0413 , H04L1/06 , H04L27/206 , H04L27/361
Abstract: Aspects of a method and system for power supply adjustment and polar modulation in a MIMO system are provided. In each RF transmit chain of a MIMO system that utilizes polar modulation, aspects of the invention may enable generating a signal representative of an amplitude of a pair of phase-quadrature baseband signals; and controlling a voltage and/or current regulator utilizing said generated signal. In this regard, a voltage and/or current supplied to a power amplifier and/or mixer of one or more of the transmit chains may be controlled based on the generated signal. Additionally, a gain of a power amplifier for each RF transmit chain may be controlled utilizing said signal representative of an amplitude. The signal representative of an amplitude may be generated by squaring each of the phase-quadrature baseband signals and calculating a square root of a sum of the squared signals.
Abstract translation: 提供了一种用于MIMO系统中的电源调整和极性调制的方法和系统的方面。 在利用极性调制的MIMO系统的每个RF发射链中，本发明的各方面可以使得能够产生表示一对相位正交基带信号的振幅的信号; 以及利用所述产生的信号来控制电压和/或电流调节器。 在这点上，可以基于产生的信号来控制提供给发射链中的一个或多个的功率放大器和/或混频器的电压和/或电流。 此外，可以利用表示幅度的所述信号来控制每个RF发射链的功率放大器的增益。 表示振幅的信号可以通过对每个相位正交基带信号进行平方并且计算平方信号的和的平方根来生成。
