公开(公告)号：US5754584A

公开(公告)日：1998-05-19

申请号：US480443

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark T. Burbach ,  Ryan N. Jensen ,  Logan Scott ,  Claude M. Williams

发明人： Randolph L. Durrant ,  Mark T. Burbach ,  Ryan N. Jensen ,  Logan Scott ,  Claude M. Williams

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： A technique for modulating and demodulating CPM spread spectrum signals and variations of CPM spread spectrum signals. A spread spectrum transmitter includes a chip sequence generator for generating a chip sequence from a data stream, a switch for dividing said chip sequence into an odd chip sequence and an even chip sequence, and a modulator for generating and transmitting a continuous phase modulated signal from said odd chip sequence and said even chip sequence. A spread spectrum receiver comprises a plurality of non-coherent serial CPM correlators, each generating a correlation signal. In a preferred embodiment, the chip sequence generator of the transmitter comprises a table of symbol codes, each symbol code comprising a series of chips corresponding to a unique series of bits in said data stream, and each non-coherent serial CPM correlator is configured to detect one of the symbol codes. The spread spectrum receiver selects a data symbol based on said correlation signals output from the non-coherent serial CPM correlators. A spread spectrum preamble may be used to set initial timing for the non-coherent serial CPM correlators.

摘要翻译： 用于调制和解调CPM扩频信号和CPM扩频信号变化的技术。 扩频发射机包括用于从数据流产生码片序列的码片序列发生器，用于将所述码片序列划分为奇数码片序列和偶数码片序列的开关，以及调制器，用于产生和发送连续相位调制信号 所述奇数芯片序列和所述均匀码片序列。 扩频接收机包括多个非相干串行CPM相关器，每个相关器产生相关信号。 在优选实施例中，发射机的码片序列发生器包括符号码表，每个符号码包括对应于所述数据流中唯一一系列比特的一系列码片，并且每个非相干序列CPM相关器被配置为 检测其中一个符号代码。 扩频接收机基于从非相干串行CPM相关器输出的所述相关信号来选择数据符号。 可以使用扩展频谱前同步码来设置非相干串行CPM相关器的初始定时。

公开(公告)号：US5757847A

公开(公告)日：1998-05-26

申请号：US484007

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark T. Burbach ,  Eugene P. Hoyt

发明人： Randolph L. Durrant ,  Mark T. Burbach ,  Eugene P. Hoyt

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233 ,  H03D3/02 ,  H04L27/22

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： An apparatus and method for receiving spread spectrum signals, and, further, for decoding phase encoded information from such signals, requires correlation of input signals into real and imaginary components and determination of the phase angles of the received signal. A transmitter can divide an input signal into a plurality of data streams, independently modulate these streams, and then superpose the plurality of resultants for transmission. A receiver can receive the superposed signal and separate it into real and imaginary parts. In one embodiment, the receiver uses a plurality of spread spectrum codes to generate a plurality of real correlation signals and a plurality of imaginary correlation signals. A transmitter may also generate a differentially phase encoded signal. Phase encoding of a signal generally involves the imposition of known phase changes in the transmitted signal at selected intervals. Decoding of the phase changes at the receiver allows recognition of the phase encoded information. Differential phase encoding, specifically, involves the imposition of a selected phase upon the signal to be transmitted, giving consideration to a prior phase of the signal. In other embodiments, a receiver uses the generated real and imaginary correlation signals to determine a sector of a phase angle of a received signal. This sector can be compared with a previously generated sector, the resultant being an indication of the differential phase encoding performed at the transmitter.

摘要翻译： 用于接收扩频信号的装置和方法，并且还用于从这些信号中解码相位编码信息，需要将输入信号与实部和虚部相关，并且确定接收信号的相位角。 发射机可以将输入信号划分为多个数据流，独立地调制这些流，然后叠加多个导出以进行传输。 接收机可以接收叠加的信号并将其分成实部和虚部。 在一个实施例中，接收机使用多个扩频码来产生多个实相关信号和多个虚相关信号。 发射机还可以产生差分相位编码的信号。 信号的相位编码通常涉及以选定的间隔对发射信号进行已知的相位变化。 在接收机处的相位变化的解码允许识别相位编码信息。 具体地说，差分相位编码涉及将所选择的相位施加到待发射的信号上，考虑到信号的先前阶段。 在其他实施例中，接收机使用所产生的实数和虚相关信号来确定接收信号的相位角的扇区。 该扇区可以与先前产生的扇区进行比较，结果是在发射机处执行的差分相位编码的指示。

公开(公告)号：US5692007A

公开(公告)日：1997-11-25

申请号：US477480

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark T. Burbach ,  Eugene P. Hoyt

发明人： Randolph L. Durrant ,  Mark T. Burbach ,  Eugene P. Hoyt

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： A method and apparatus for phase encoding and decoding a CPM spread spectrum signal. A transmitter divides a data stream into a data symbol portion and an associated phase information portion. The data symbol portion is used to select one of a plurality of spread spectrum codes for transmission from a symbol table. The phase information portion is used to differentially phase encode the data symbol prior to transmission. The transmitter divides the phase encoded spread spectrum codes into a plurality of data streams (such as I and Q data streams), independently modulates the I and Q data streams using CPM or a related technique, and superposes the plurality of resultants for transmission. A receiver receives the superposed spread spectrum signal and simultaneously attempts to correlate for a plurality of chip sequences (such as I and Q chip sequences), and derives a real correlation signal and an imaginary correlation signal. For each received symbol, the receiver determines which of a plurality of phase sectors the phase angle lies in, and compares the difference between the present phase sector and the immediately preceding phase sector. For biphase encoding, if the difference in closer to 0.degree., then the receiver outputs a first bit, and if the difference is closer to 180.degree., the receiver outputs a second bit. In a particular embodiment, a plurality of correlators operate in parallel to carry out phase decoding of the received signal.

摘要翻译： 一种用于相位编码和解码CPM扩频信号的方法和装置。 发射机将数据流划分为数据符号部分和相关联的相位信息部分。 数据符号部分用于从符号表中选择用于传输的多个扩频码中的一个。 相位信息部分用于在传输之前对数据符号进行差分相位编码。 发射机将相位编码的扩频码分成多个数据流（例如I和Q数据流），使用CPM或相关技术独立地调制I和Q数据流，并将多个结果叠加以进行传输。 接收机接收叠加的扩频信号，并同时尝试对多个码片序列（例如I和Q码片序列）进行相关，并且导出实际相关信号和虚拟相关信号。 对于每个接收到的符号，接收机确定相位角所在的多个相位扇区中的哪一个，并且比较当前相位扇区与紧邻在前的相位扇区之间的差异。 对于双相编码，如果差值接近0°，则接收机输出第一位，如果差值接近180°，则接收机输出第二位。 在特定实施例中，多个相关器并行操作以执行接收信号的相位解码。

公开(公告)号：US5659574A

公开(公告)日：1997-08-19

申请号：US481613

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark T. Burbach

发明人： Randolph L. Durrant ,  Mark T. Burbach

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233 ,  H04L27/14

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： A technique for demodulating CPM spread spectrum signals and variations thereof. A receiver receives a CPM spread spectrum signal, splits it into two signals, demodulates the signals (either coherently or non-coherently) and simultaneously attempts to correlate for a plurality of chip sequences (e.g., I and Q or even and odd), ultimately combining the results into a unified correlation signal. A plurality of A/D converters quantize the demodulated signals into multi-bit digital signals prior to correlation, and multi-bit correlators operate on the multi-bit digital signals to produce correlation signals that are combined to form a unified correlation signal for detection.

摘要翻译： 一种用于解调CPM扩频信号及其变化的技术。 接收机接收CPM扩频信号，将其分成两个信号，解调信号（相干或非相干），并同时尝试将多个码片序列（例如，I和Q或偶数和奇数）相关，最终 将结果组合成统一的相关信号。 多个A / D转换器在相关之前将解调信号量化为多位数字信号，并且多比特相关器对多比特数字信号进行操作，以产生相关信号，这些相关信号被组合以形成用于检测的统一的相关信号。

公开(公告)号：US06839539B2

公开(公告)日：2005-01-04

申请号：US10173912

申请日：2002-06-17

申请人： Randolph L. Durrant ,  Logan Scott ,  John K. Reece

发明人： Randolph L. Durrant ,  Logan Scott ,  John K. Reece

IPC分类号： G01S5/14 ,  G01S11/02 ,  G01S19/25 ,  G01S19/48 ,  H04B7/26 ,  H04B7/15 ,  H04Q7/20

CPC分类号： H04B7/2606 ,  G01S5/0273 ,  G01S5/14 ,  G01S11/02 ,  H04B7/155 ,  H04W16/26

摘要： A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includes a signal tagging means that adds a unique electronic signature to the repeated signal such that position determination errors due to a non-line of sight propagation path can be corrected. The repeated signal is received and processed with a location measurement unit to determine the time of arrival and to extract the signal tag of the repeated signal. The time of arrival measurement and recovered signal tag are then processed at a mobile location center to determine the true position of the transmitter.

公开(公告)号：US06501955B1

公开(公告)日：2002-12-31

申请号：US09596653

申请日：2000-06-19

申请人： Randolph L. Durrant ,  Logan Scott ,  John K. Reece

发明人： Randolph L. Durrant ,  Logan Scott ,  John K. Reece

IPC分类号： H04Q720

CPC分类号： H04B7/2606 ,  G01S5/0273 ,  G01S5/14 ,  G01S11/02 ,  H04B7/155 ,  H04W16/26

摘要： A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includes a signal tagging means that adds a unique electronic signature to the repeated signal such that position determination errors due to a non-line of sight propagation path can be corrected. The repeated signal is received and processed with a location measurement unit to determine the time of arrival and to extract the signal tag of the repeated signal. The time of arrival measurement and recovered signal tag are then processed at a mobile location center to determine the true position of the transmitter.

摘要翻译： 将RF信号中继器系统添加到无线通信网络中，其通过将下行链路（基站到移动用户）信号和上行链路（移动用户到基站）信号升高来增加蜂窝覆盖区域的外围的用户数据速率。 RF信号中继器系统包括信号标签装置，其将独特的电子签名添加到重复信号，使得可以校正由于非线视线传播路径引起的位置确定错误。 用位置测量单元接收和处理重复的信号，以确定到达时间并提取重复信号的信号标签。 然后在移动位置中心处处理到达时间和恢复的信号标签，以确定发射机的真实位置。

公开(公告)号：US5856998A

公开(公告)日：1999-01-05

申请号：US769187

申请日：1996-12-18

申请人： Randolph L. Durrant ,  Mark Burbach

发明人： Randolph L. Durrant ,  Mark Burbach

IPC分类号： H04B1/707 ,  H04B1/708 ,  H04B1/7093 ,  H04J13/10 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233

CPC分类号： H04B1/708 ,  H04B1/707 ,  H04B1/7093 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B2201/70701

摘要： A technique for modulating and demodulating continuous phase modulation (CPM) spread spectrum signals and variations thereof. A transmitter encodes M data bits using a selected spread spectrum code, divides the spread spectrum code into a plurality of chip codes (such as even chips and odd chips), independently modulates the even and odd chips with orthogonal carrier signals using CPM or a related technique, and superposes the plurality of resultants for transmission. A receiver receives the superposed spread spectrum signal, divides the spread spectrum signal into duplicate signals, separately demodulates the duplicate signals into an odd chip signal and an even chip signal, simultaneously attempts to correlate the odd chip signal with a locally generated odd chip sequence and the even chip signal with a locally generated even chip sequence, and interleaves the correlation signals into a unified correlation signal. The unified correlation signal may be compared against other correlation signals to determine the content of the transmitted data.

摘要翻译： 用于调制和解调连续相位调制（CPM）扩频信号及其变化的技术。 发射机使用所选择的扩频码对M个数据比特进行编码，将扩频码划分成多个码片（例如偶数码片和奇数码片），使用CPM或相关的方式用正交载波信号独立调制偶数和奇数码片 技术，并叠加多个传输结果。 接收机接收叠加的扩频信号，将扩展频谱信号分解为重复信号，将重复信号单独解调为奇数芯片信号和均匀码片信号，同时尝试将奇数芯片信号与本地生成的奇数码片序列相关， 具有本地产生的均匀码片序列的偶数码片信号，并将相关信号交织为统一的相关信号。 可以将统一的相关信号与其他相关信号进行比较，以确定发送数据的内容。

公开(公告)号：US5963586A

公开(公告)日：1999-10-05

申请号：US486824

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark Burbach

发明人： Randolph L. Durrant ,  Mark Burbach

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： A technique for modulating and demodulating CPM spread spectrum signals and variations of CPM spread spectrum signals. A transmitter divides a signal data stream into a plurality of data streams (such as I and Q data streams), independently modulates the I and Q data streams using CPM or a related technique, and superposes the plurality of resultants for transmission. A receiver receives the superposed spread spectrum signal and simultaneously attempts to correlate for a plurality of chip sequences (such as I and Q chip sequences), and interleaves the correlated I and Q data streams into a unified signal data stream. In one embodiment, the receiver separates the received spread spectrum signal into real and imaginary parts, attempts to correlate both real and imaginary parts for a plurality of chip sequences, and combines the real I, real Q, imaginary I, and imaginary Q signals into a unified signal data stream. The demodulating reference signal in the receiver may or may not be frequency or phase matched with the transmitter. In other embodiments, single bit or multi-bit digitization of the received spread spectrum signal for both I and Q signals (or real I, real Q, imaginary I, and imaginary Q signals) is carried out prior to correlation. In another embodiment, the transmitter differentially phase encodes the information to be transmitted, and the receiver decodes the phase encoded information by determining a quantized phase angle of the received signal.

摘要翻译： 用于调制和解调CPM扩频信号和CPM扩频信号变化的技术。 发射机将信号数据流分割成多个数据流（例如I和Q数据流），使用CPM或相关技术独立地调制I和Q数据流，并将多个结果叠加以进行传输。 接收机接收叠加的扩频信号，并同时尝试对多个码片序列（例如I和Q码片序列）进行相关，并将相关的I和Q数据流交织成统一的信号数据流。 在一个实施例中，接收机将接收到的扩展频谱信号分离成实部和虚部，尝试将多个码片序列的实部和虚部相关，并将实际I，实数Q，虚数I和虚数Q信号组合成 一个统一的信号数据流。 接收机中的解调参考信号可以是或可以不是与发射机频率或相位匹配的。 在其他实施例中，在相关之前执行用于I和Q信号（或实数I，实数Q，虚I和虚信号Q）的接收扩展频谱信号的单比特或多比特数字化。 在另一个实施例中，发射机对待发射的信息进行差分相位编码，并且接收机通过确定接收信号的量化相位角来解码相位编码信息。

公开(公告)号：US5832028A

公开(公告)日：1998-11-03

申请号：US480914

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark Burbach

发明人： Randolph L. Durrant ,  Mark Burbach

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： A technique for modulating and demodulating CPM spread spectrum signals and variations of CPM spread spectrum signals. A transmitter divides a signal data stream into a plurality of data streams (such as I and Q data streams), independently modulates the I and Q data streams using CPM or a related technique, and superposes the plurality of resultants for transmission. A receiver receives the superposed spread spectrum signal and simultaneously attempts to correlate for a plurality of chip sequences (such as I and Q chip sequences), and interleaves the correlated I and Q data streams into a unified signal data stream. In one embodiment, the receiver separates the received spread spectrum signal into real and imaginary parts, attempts to correlate both real and imaginary parts for a plurality of chip sequences, and combines the real I, real Q, imaginary I, and imaginary Q signals into a unified signal data stream. The demodulating reference signal in the receiver may or may not be frequency or phase matched with the transmitter. In other embodiments, single bit or multi-bit digitization of the received spread spectrum signal for both I and Q signals (or real I, real Q, imaginary I, and imaginary Q signals) is carried out prior to correlation. In another embodiment, the transmitter differentially phase encodes the information to be transmitted, and the receiver decodes the phase encoded information by determining a quantized phase angle of the received signal.

摘要翻译： 用于调制和解调CPM扩频信号和CPM扩频信号变化的技术。 发射机将信号数据流划分为多个数据流（例如I和Q数据流），使用CPM或相关技术独立地调制I和Q数据流，并将多个结果叠加以进行传输。 接收机接收叠加的扩频信号，并同时尝试对多个码片序列（例如I和Q码片序列）进行相关，并将相关的I和Q数据流交织成统一的信号数据流。 在一个实施例中，接收机将接收到的扩展频谱信号分离成实部和虚部，尝试将多个码片序列的实部和虚部相关，并将实际I，实数Q，虚数I和虚数Q信号组合成 一个统一的信号数据流。 接收机中的解调参考信号可以是或可以不是与发射机频率或相位匹配的。 在其他实施例中，在相关之前执行用于I和Q信号（或实数I，实数Q，虚I和虚信号Q）的接收扩展频谱信号的单比特或多比特数字化。 在另一个实施例中，发射机对待发射的信息进行差分相位编码，并且接收机通过确定接收信号的量化相位角来解码相位编码信息。

公开(公告)号：US5610940A

公开(公告)日：1997-03-11

申请号：US480668

申请日：1995-06-07

申请人： Randolph L. Durrant ,  Mark Burbach

发明人： Randolph L. Durrant ,  Mark Burbach

IPC分类号： H04B20060101 ,  H04B1/707 ,  H04J13/00 ,  H04J14/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/233 ,  H04L27/14

CPC分类号： H04B1/707 ,  H04B1/708 ,  H04J13/10 ,  H04L27/2014 ,  H04L27/2278 ,  H04L27/2332 ,  H04B1/7093 ,  H04B2201/70701 ,  H04J14/005

摘要： A technique for modulating and demodulating continuous phase modulation (CPM) spread spectrum signals and variations thereof. A transmitter encodes M data bits using a selected spread spectrum code, divides the spread spectrum code into a plurality of chip codes (such as even chips and odd chips), independently modulates the even and odd chips with orthogonal carrier signals using CPM or a related technique, and superposes the plurality of resultants for transmission. A receiver receives the superposed spread spectrum signal and divides it into a real signal and an imaginary signal. The real signal is connected to a real CPM correlator which demodulates its input into a real I signal and a real Q signal, separately correlates the real I signal with the odd chips of a chip code and the real Q signal with the even chips of the chip code, and combines the correlation signals into a real correlation signal. The imaginary signal is connected to an imaginary CPM correlator which demodulates its input into an imaginary I signal and an imaginary Q signal, separately correlates the imaginary I signal with the odd chips of the chip code and the imaginary Q signal with the inverse of the even chips of the chip code, and combines the correlation signals into an imaginary correlation signal. The real and imaginary correlation signals are combined into a unified correlation signal.

摘要翻译： 用于调制和解调连续相位调制（CPM）扩频信号及其变化的技术。 发射机使用所选择的扩频码对M个数据比特进行编码，将扩频码划分成多个码片（例如偶数码片和奇数码片），使用CPM或相关的方式用正交载波信号独立调制偶数和奇数码片 技术，并叠加多个传输结果。 接收机接收叠加的扩频信号，并将其分为实数信号和虚信号。 真实信号连接到真正的CPM相关器，其将其输入解调为实际I信号和实际Q信号，将实际I信号与芯片代码的奇数芯片和实际Q信号分别与 并将相关信号组合成实相关信号。 虚信号连接到虚拟CPM相关器，其将其输入解调为虚信号I和虚拟Q信号，将虚信号I与芯片码的奇数码和虚数Q信号分别相互关联， 芯片代码的芯片，并将相关信号组合成虚拟相关信号。 实数和虚拟相关信号被组合成统一的相关信号。