公开(公告)号：US20020009125A1

公开(公告)日：2002-01-24

申请号：US09877131

申请日：2001-06-11

发明人： Zhen Liang Shi

IPC分类号： H04K001/00 ,  H04B015/00 ,  H04L027/30

CPC分类号： H04B1/69 ,  H04B1/709 ,  H04B2001/6912

摘要： A high bandwidth efficient spread spectrum modulation using chirp waveform. The invention provides a method and apparatus for effecting the high bandwidth efficient spread spectrum modulation using chirp waveform. The method involves reducing the data rate by narrowing the bandwidth or by using a smaller set of orthogonal sequences. The apparatus includes a transmitter and a receiver. The transmitter includes an encoder, an interleaver, a serial to parallel convertor, a baseband modulator that modulates the original bits onto each orthogonal sequence, and IF modulation. The receiver includes a down converter, an analog to digital converter, digital correlators, a synchronizer, a parallel to serial convertor, a deinterleaver, and a decoder.

摘要翻译： 使用啁啾波形的高带宽有效扩频调制。 本发明提供一种利用啁啾波形来实现高带宽有效扩频调制的方法和装置。 该方法包括通过缩小带宽或通过使用较小的正交序列来降低数据速率。 该装置包括发射机和接收机。 发射机包括编码器，交织器，串行到并行转换器，在每个正交序列上调制原始比特的基带调制器和IF调制。 接收机包括下变频器，模数转换器，数字相关器，同步器，并行到串行转换器，解交织器和解码器。

公开(公告)号：US20010043656A1

公开(公告)日：2001-11-22

申请号：US09297182

申请日：1999-04-26

申请人： Nanotron Gesellschaft Fur Mikrotechnik MBH

发明人： MANFRED KOSLAR ,  ZBIGNIEW IANELLI

IPC分类号： H03K007/06

CPC分类号： H03K7/04 ,  H03K7/06 ,  H04B1/69 ,  H04B2001/6912

摘要： Method for wireless information transfer, in particular for mobile communications, in which an input signal (s1, g4) is subjected to a modulation in a transmitter (2 to 8) and reaches a receiver (11 to 15) through a transmission channel, whereby angle modulated pulses, carrying information and possessing a frequency spectrum, are generated in the transmitter in such a way that they can be time compressed in a receiver by means of a filter (13) with frequency dependent, differential delay time, also known as group delay, in such a way, that pulses arise with shortened duration and increased amplitude compared to the emitted pulses, and at least a portion of the information is imprinted onto the pulses using an additional modulation, independent of the angle modulation, and/or is used for controlling a parameter of the angle modulation that can then be registered in the receiver.

摘要翻译： 用于无线信息传输的方法，特别是用于移动通信，其中输入信号（s1，g4）在发射机（2至8）中进行调制并通过传输信道到达接收机（11至15），由此 在发送器中产生承载信息并拥有频谱的角度调制脉冲，使得它们可以通过具有频率依赖的差分延迟时间（也称为组）的滤波器（13）在接收机中被时间压缩 延迟，以这种方式，与发射的脉冲相比，脉冲具有缩短的持续时间和增加的幅度，并且使用独立于角度调制的附加调制将信息的至少一部分压印到脉冲上，和/或 用于控制可以在接收机中登记的角度调制参数。

公开(公告)号：US6064695A

公开(公告)日：2000-05-16

申请号：US879522

申请日：1997-06-20

申请人： Dan Raphaeli

发明人： Dan Raphaeli

IPC分类号： H04B1/69 ,  H04B1/7093 ,  H04L23/02 ,  A61F2/06

CPC分类号： H04B1/7093 ,  H04B1/69 ,  H04L23/02 ,  H04B2001/6912 ,  H04B2201/70703

摘要： A spread spectrum data communication system utilizing a modulation technique referred to as differential code shift keying (DCSK) transmits data in the form of time shifts between consecutive circularly rotated waveforms of length T known as spreading waveforms. A plurality of bits are transmitted during each symbol period which is divided into a plurality of shift indexes with each shift index representing a particular bit pattern. The spreading waveform is rotated by an amount in accordance with the data to be transmitted or is conveyed in the difference between two consecutive rotations. A correlator employing a matched filter having a template of the chirp waveform pattern is used to detect the amount of rotation of the chirp within the received signal for each symbol. The received data is fed into a shift register and circularly rotated. For each rotation shift, the matched filter generates a correlation sum. The shift index chosen for each symbol corresponds to the shift index that yields the maximum correlation sum. Differential shift indexes are generated by subtracting the currently received shift index from the previously received shift index. The differential shift index is then decoded to yield the originally transmitted data.

摘要翻译： 利用被称为差分码移位键控（DCSK）的调制技术的扩频数据通信系统以长度T的已知为扩频波形的连续循环旋转波形之间的时移形式发送数据。 在每个符号周期期间发送多个位，其被划分为多个移位索引，每个移位索引表示特定位模式。 扩展波形根据要传输的数据旋转一定量，或以两次连续旋转之间的差异传送。 使用具有啁啾波形图案的模板的匹配滤波器的相关器来检测针对每个符号的接收信号内的啁啾的旋转量。 接收的数据被馈送到移位寄存器并循环旋转。 对于每个旋转移位，匹配滤波器产生相关和。 为每个符号选择的移位索引对应于产生最大相关和的移位索引。 通过从先前接收的移位索引中减去当前接收到的移位索引来生成差分偏移索引。 差分移位索引然后被解码以产生原始传输的数据。

公开(公告)号：US6034988A

公开(公告)日：2000-03-07

申请号：US905904

申请日：1997-08-04

申请人： James E. VanderMey ,  James Patella ,  Bart Blanchard ,  William Earnshaw ,  Gregory Magin

发明人： James E. VanderMey ,  James Patella ,  Bart Blanchard ,  William Earnshaw ,  Gregory Magin

IPC分类号： H04L12/28 ,  H04B15/00

CPC分类号： H04B1/713 ,  H04B2001/6912 ,  H04W24/00 ,  H04W72/02 ,  H04W74/0808

摘要： An apparatus and methods are provided for network radio frequency ("RF") data communications. The apparatus preferably has an extended channel radio transmitter for selectively transmitting data communication radio signals across a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels. The transmitter preferably includes a channel scanner for scanning the extended data communication channels for availability prior to transmitting across a selected one of the plurality of extended data communication channels. An extended channel radio receiver is responsive to the extended channel radio transmitter for receiving the data communication signals from the selected one of the extended data communication channels. The extended channel radio receiver preferably includes an extended channel data detection synchronizer responsive to the data communications signals being received by the receiver for synchronizing the transmitting and receiving of the data communication signals across the extended data communications channels. Any and all extended channel contending transmitters and receivers or transceivers within a network preferably sense and synchronize to the extended channel being transmitted within a predetermined period of time, i.e., within one bit time of Unit Symbol Time. This assures that normal carrier sense access control protocols operate correctly across the virtual channel which includes the plurality of possible extended channels.

摘要翻译： 提供了一种用于网络射频（“RF”）数据通信的装置和方法。 该装置优选地具有扩展信道无线电发射机，用于选择性地在分别限定多个扩展数据通信信道的多个不同载波频率上传输数据通信无线电信号。 所述发射机优选地包括：信道扫描器，用于在传输所述多个扩展数据通信信道中的所选择的一个之前扫描所述扩展数据通信信道以获得可用性。 扩展信道无线电接收机响应于扩展信道无线电发射机，用于从所选择的一个扩展数据通信信道接收数据通信信号。 扩展信道无线电接收机优选地包括扩展信道数据检测同步器，其响应于由接收机接收的数据通信信号，用于同步跨越扩展数据通信信道的数据通信信号的发送和接收。 在网络内的任何和所有扩展信道竞争发射机和接收机或收发机优选地在预定时间段内，即在单位符号时间的一个比特时间内传输和扩展信道同步。 这确保正常的载波侦听接入控制协议在包括多个可能的扩展信道的虚拟信道上正确地工作。

公开(公告)号：US5278862A

公开(公告)日：1994-01-11

申请号：US863213

申请日：1992-04-03

申请人： Timothy J. Vander Mey

发明人： Timothy J. Vander Mey

IPC分类号： H04B1/69 ,  H04B3/54 ,  H04L7/06 ,  H04L27/30

CPC分类号： H04L7/06 ,  H04B1/69 ,  H04B3/542 ,  H04L27/103 ,  H04B2001/6912 ,  H04B2203/5408 ,  H04B2203/5416

摘要： A method of transmitting and receiving data packets across a noisy communication medium, e.g., an AC power line. The data packets are transmitted using spread-spectrum chirps. A first sequence of the chirps forms a contention-resolution preamble used by transmitters to resolve conflicting contentions for access to the communication medium. The preamble is followed by a second sequence of chirps that form a start-of-packet symbol used by receivers to delineate the start of data within the packet. To simplify detection at the receiver, identical chirps are used in the preamble and the start-of-packet symbol. To enable the receiver to avoid erroneously interpreting preamble chirps as start-of-packet chirps, and thereby erroneously begin to accept packet data, chirps in the preamble are transmitted at a different pitch (i.e., different time period between inception of successive chirps) from chirps in the start-of-packet symbol.

摘要翻译： 一种在噪声通信介质（例如AC电力线）上发送和接收数据分组的方法。 使用扩频啁啾传输数据包。 线性调频脉冲的第一序列形成发射机使用的竞争解析前导码，以解决用于接入通信介质的冲突争用。 前导码之后是第二个线性调频序列，其形成由接收机用于描述分组内的数据开始的分组开始符号符号。 为了简化接收机的检测，在前导码和分组符号符号中使用相同的啁啾声。 为了使接收机能够避免将前同步码啁啾错误地解释为开始分组线性调频脉冲，从而错误地开始接收分组数据，前同步码中的啁啾以不同的音调（即，连续啁啾开始之间的不同时间段）从 在包起始符号中的啁啾声。

公开(公告)号：US20240356578A1

公开(公告)日：2024-10-24

申请号：US18644853

申请日：2024-04-24

申请人： Somewear Labs, Inc.

发明人： Alan Besquin ,  James Kubik ,  Diego Lozano Trevino ,  Braden Young ,  Rachel Carandang

IPC分类号： H04B1/69 ,  H04W72/56

CPC分类号： H04B1/69 ,  H04W72/56 ,  H04B2001/6912

摘要： A system includes a network node device operable to dynamically connect to different networks and different types of networks based on factors including latency and noise levels in each network. The system allows for low power transmission of data packets as well as obfuscation of transferred data packets by splitting packets for a single file across multiple nodes in a mesh network, where the mesh network then recombines the signals to externally convey the data. The system leverages the use of LoRa communication across one or more networks to communicate critical data, such as location data for particular devices, at long ranges with minimized risk of detection.

公开(公告)号：US12087153B2

公开(公告)日：2024-09-10

申请号：US18177674

申请日：2023-03-02

申请人： Wacom Co., Ltd.

发明人： Sadao Yamamoto ,  Hideyuki Hara

IPC分类号： G08C17/02 ,  G06F3/041 ,  G06F3/044 ,  H04B1/69 ,  H04B1/7073

CPC分类号： G08C17/02 ,  G06F3/04162 ,  G06F3/0441 ,  G06F3/0442 ,  H04B1/7073 ,  G08C2201/32 ,  H04B2001/6912

摘要： A sensor controller includes a transmitter configured to transmit an uplink signal including a first partial signal and a second partial signal. The transmitter is configured to transmit the first partial signal by direct spreading using a first spread code and transmit the second partial signal by direct spreading using a second spread code which is different from the first spread code and which has an identical chip time length to the first spread code. An active stylus includes a receiver configured to receive an uplink signal including a first partial signal and a second partial signal. The receiver is configured to synchronize with the uplink signal by detecting the first partial signal using a first spread code and thereafter detect the second partial signal using a second spread code, which is different from the first spread code and has an identical chip time length to the first spread code.

公开(公告)号：US11942993B2

公开(公告)日：2024-03-26

申请号：US17784104

申请日：2020-12-18

申请人： Molex, LLC

发明人： Kuen-Ting Tsai ,  Wei-Hung Chen ,  Zuon-Min Chuang ,  Yao-Wen Liang

IPC分类号： H04B10/2513 ,  G02F1/21 ,  H04B1/69 ,  H04B10/524 ,  H04B10/54

CPC分类号： H04B10/25137 ,  G02F1/212 ,  H04B1/69 ,  H04B10/524 ,  H04B10/541 ,  H04B2001/6912

摘要： An optical transmission device includes: a control module generate a control signal output which includes a slope adjust signal and a bias voltage offset adjust signal according to an input signal indicating a dispersion amount an electrical level adjust signal; a multi-level pulse amplitude modulator; and an asymmetrical optical modulator which is controlled by the slope adjust signal to be operated at one of a positive slope and a negative slope of a transfer function of the asymmetrical optical modulator itself, and is controlled by the bias voltage offset adjust signal of the control signal output to offset a bias voltage point of the asymmetrical optical modulator itself from a quadrature point of the transfer function, and modulates the multi-level pulse amplitude modulation signal to an optical signal to generate an optical modulate signal having a chirp.

公开(公告)号：US20230421249A1

公开(公告)日：2023-12-28

申请号：US18244263

申请日：2023-09-10

申请人： Syed Karim

发明人： Syed Karim

IPC分类号： H04B7/185 ,  H04B1/69

CPC分类号： H04B7/18526 ,  H04B1/69 ,  H04B7/18563 ,  H04B2001/6912

摘要： Systems for communicating data through a satellite are disclosed. The systems generally include a radio designed for terrestrial communications that is configured to uplink data to one or more satellites. The one or more satellites are configured to receive the data from the terrestrial radio. In addition, the systems include terrestrial receivers, such as one or more chirp spread spectrum radios, positioned at ground level, which are configured to receive the data from the one or more satellites.

公开(公告)号：US11831744B2

公开(公告)日：2023-11-28

申请号：US18148024

申请日：2022-12-29

申请人： Texas Instruments Incorporated

发明人： Anand G. Dabak ,  Badri N Varadarajan ,  Il Han Kim ,  Tarkesh Pande

IPC分类号： H04L69/22 ,  H04B3/30 ,  H04B10/11 ,  H04B3/54 ,  H04B1/69

CPC分类号： H04L69/22 ,  H04B3/30 ,  H04B3/54 ,  H04B3/542 ,  H04B10/11 ,  H04B2001/6912

摘要： Methods for building, transmitting, and receiving frame structures in power line communications (PLC) are described. Various techniques described herein provide a preamble design using one or more symbols. One or more preamble symbols may be interspersed within a header portion of a PLC frame to facilitate estimation of a frame boundary and/or sampling frequency offset, for example, in the presence of impulsive noise.