公开(公告)号：WO1998002973A1

公开(公告)日：1998-01-22

申请号：PCT/US1997013117

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  HARRISON, Daniel, David ,  TIEMANN, Jerome, Johnson

Inventor： GENERAL ELECTRIC COMPANY

IPC: H04B01/707

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/71075 ,  H04B2201/70709 ,  H04W52/0283 ,  Y02D70/164 ,  Y02D70/40

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. Prior to sampling and storage, the incoming signal is translated to an IF signal. Also prior to storage, the IF signal is corrected for a frequency offset signal. The frequency offset may be caused by many sources, Doppler shift or local oscillator error, for example. Once the signal is corrected for the frequency offset, the signal sample is stored in memory. The signal sample is read from memory as necessary to process the signal. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

Abstract translation: 直接序列扩频接收机对输入信号进行采样并将样本存储在存储器中。 在采样和存储之前，输入信号被转换为IF信号。 同样在存储之前，针对频率偏移信号校正IF信号。 频率偏移可能由许多来源引起，例如多普勒频移或本地振荡器误差。 一旦对频率偏移校正了信号，信号样本将被存储在存储器中。 根据需要从存储器读取信号采样以处理信号。 这样的接收机在全球定位卫星（GPS）信号处理中是有用的，其中输入信号包含用CDMA编码编码的几个卫星传输。

公开(公告)号：WO1998002974A1

公开(公告)日：1998-01-22

申请号：PCT/US1997013124

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  HARRISON, Daniel, David ,  TIEMANN, Jerome, Johnson

Inventor： GENERAL ELECTRIC COMPANY

IPC: H04B01/707

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/09 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/709 ,  H04B1/71075 ,  H04B2201/70709 ,  H04W52/0283 ,  Y02D70/164 ,  Y02D70/40

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. The signal sample is read from memory as necessary to process the signal without further signal acquisition. The correlator calculates an inner product by simultaneously correlating each bit of the sample with a corresponding bit of a replica signal. If the inner product does not exceed a threshold value the correlator calculates another inner product between the same signal sample and another replica signal. This occurs until all available signals are identified. In one embodiment, memory is segmented and each segment is read by a separate correlator allowing faster identification of one signal or multiple signals to be acquired simultaneously. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

Abstract translation: 直接序列扩频接收机对输入信号进行采样并将样本存储在存储器中。 根据需要从存储器读取信号样本，以处理信号而无需进一步的信号采集。 相关器通过将样本的每个位与副本信号的相应位同时相关来计算内积。 如果内积不超过阈值，则相关器计算相同信号样本与另一副本信号之间的另一内积。 这发生到所有可用信号被识别为止。 在一个实施例中，存储器被分段，并且每个段被单独的相关器读取，允许更快地识别要同时获取的一个信号或多个信号。 这样的接收机在全球定位卫星（GPS）信号处理中是有用的，其中输入信号包含用CDMA编码编码的几个卫星传输。

公开(公告)号：WO1998002758A1

公开(公告)日：1998-01-22

申请号：PCT/US1997013196

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  HARRISON, Daniel, David ,  TIEMANN, Jerome, Johnson

Inventor： GENERAL ELECTRIC COMPANY

IPC: G01S05/14

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/71075 ,  H04B2201/70709

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. Power is then inhibited to the tuner of the receiver to minimize power consumption. The signal sample may be read from memory when necessary to process the signal without further signal acquisition. Power to other receiver sections may be selectively controlled to minimize power consumption. Such a receiver is useful in global positioning satellite (GPS) signal processing where the receiver has a limited power supply.

Abstract translation: 直接序列扩频接收机对输入信号进行采样并将样本存储在存储器中。 然后，功率被禁止接收机的调谐器以最小化功耗。 当需要处理信号而无需进一步的信号采集时，可以从存储器读取信号样本。 可以选择性地控制对其他接收机部分的功率以最小化功率消耗。 这样的接收机在接收机具有有限电源的全球定位卫星（GPS）信号处理中是有用的。

公开(公告)号：WO1998002984A2

公开(公告)日：1998-01-22

申请号：PCT/US1997013114

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  TIEMANN, Jerome, Johnson ,  HARRISON, Daniel, David

Inventor： GENERAL ELECTRIC COMPANY

IPC: H04B17/07

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/09 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/709 ,  H04B1/71075 ,  H04B2201/70709 ,  H04W52/0283 ,  Y02D70/164 ,  Y02D70/40

Abstract: A direct sequence spread spectrum architecture permits low power consumption during a synchronizationg phase of data reception by allowing the receiver to be turned off during most of the aquisition phase of reception, or by using a parallel correlator to keep acquisition time short. The architecture is particularly suitable for global positioning satellite (GPS) signal processing and permits multiple satellite codes and multiple Doppler bins to be searched either sequentially, without requiring the receiver to be turned on during the search process. The receiver output baseband data is sampled and stored over a time interval sufficient to achieve acquisition and synchronization for any one code division multiple access (CDMA) signal at any specific Doppler shift. This sample is digitally recorded and re-played from memory as many times as may be required to acquire and synchronize each desired CDMA signal. To keep processing energy consumption low, an analog (capacitor-based) cross-correlator is used. The order of coherent and non-coherent processing for all code-Doppler channels is chosen to maximize energy efficiency while minimizing required processor hardware.

Abstract translation: 直接序列扩频架构允许在数据接收的同步期间允许接收机在接收的大部分时间期间被关闭，或通过使用并行相关器来保持采集时间短的低功耗。 该架构特别适用于全球定位卫星（GPS）信号处理，并允许顺序地搜索多个卫星码和多个多普勒频段，而不需要在搜索过程中接收接收机。 接收机输出基带数据被采样并存储在足以在任何特定多普勒频移处的任何一个码分多址（CDMA）信号的采集和同​​步的时间间隔内。 该采样数据记录并从存储器重新播放多次，以获取并同步每个期望的CDMA信号。 为了保持处理能耗低，使用了基于模拟（电容器的）互相关器。 选择所有码多普勒通道的相干和非相干处理的顺序，以最大限度地提高能量效率，同时最大限度地减少所需的处理器硬件。

公开(公告)号：WO1998002972A1

公开(公告)日：1998-01-22

申请号：PCT/US1997013113

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  HARRISON, Daniel, David ,  TIEMANN, Jerome, Johnson

Inventor： GENERAL ELECTRIC COMPANY

IPC: H04B01/707

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/71075 ,  H04B2201/70709 ,  H04W52/0283 ,  Y02D70/164 ,  Y02D70/40

Abstract: A direct sequence spread spectrum receiver receives an input signal on a signal carrier frequency. The receiver generates a local oscillator signal which is offset from the carrier frequency. The input signal and the local oscillator signal are mixed producing an IF signal which is converted to a digital sample and stored in memory. A corresponding replica signal is generated and correlated with the digital sample. The offset of the local oscillator frequency from the carrier frequency is sufficiently large to cause the harmonics of the replica signal to fall above the highest frequencyof the IF signal. Such a receiver is useful in global positioning satellite (GPS) signal processing where a replica generator must be used to aquire the incoming satellite transmissions.

Abstract translation: 直接序列扩频接收机接收信号载波频率上的输入信号。 接收机产生偏离载波频率的本地振荡器信号。 输入信号和本地振荡器信号混合，产生IF信号，该信号被转换成数字采样并存储在存储器中。 生成相应的复制信号并与数字样本相关联。 本地振荡器频率与载波频率的偏移量足够大，导致复制信号的谐波下降到IF信号的最高频率以上。 这种接收机在全球定位卫星（GPS）信号处理中是有用的，其中必须使用复制发生器来获取进入的卫星传输。

公开(公告)号：WO1998002830A1

公开(公告)日：1998-01-22

申请号：PCT/US1997013201

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  TIEMANN, Jerome, Johnson ,  HARRISON, Daniel, David

Inventor： GENERAL ELECTRIC COMPANY

IPC: G06F17/15

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/709 ,  H04B1/71075 ,  H04B2201/70709

Abstract: Correlation between a pair of digital signal segments is measured by apparatus including a pluraltiy of multipliers (1200). Each of the multipliers produces the product of a respective sample of each one of the signal segments. The outputs of a plurality of digital-to-analog (D/A) converters (1300) are coupled to a summer (80), while each respective one of the multipliers (1200) is coupled to the input of a respective one of the D/A converters (1300). The summer (80) produces an analog output signal equal to the sum of the analog output signals produced by the plurality of D/A converter.

Abstract translation: 一对数字信号段之间的相关性由包括多个乘法器（1200）的装置测量。 每个乘法器产生每个信号段的相应样本的乘积。 多个数模（D / A）转换器（1300）的输出耦合到加法器（80），而乘法器（1200）中的每一个耦合到相应的一个 D / A转换器（1300）。 夏天（80）产生等于由多个D / A转换器产生的模拟输出信号之和的模拟输出信号。

公开(公告)号：WO1998002759A1

公开(公告)日：1998-01-22

申请号：PCT/US1997013198

申请日：1997-07-03

Applicant: GENERAL ELECTRIC COMPANY ,  TIEMANN, Jerome, Johnson ,  HARRISON, Daniel, David

Inventor： GENERAL ELECTRIC COMPANY

IPC: G01S05/14

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/71075 ,  H04B2201/70709

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and translates the signal to an IF signal. The IF signal is sampled ans stored in memory (192, 194). In one embodiment, the memory consists of two memory banks which alternately receive sample segments. During a write period to one of the memory banks, the other memory bank supplies its output to a processor (70). This continues in a ping-pong manner. In another embodiment, a single memory bank is filled and read as necessary, the receiver ignoring incoming signal until the processor has completed processing the sample available at the output of the memory. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

Abstract translation: 直接序列扩频接收机对输入信号进行采样，并将信号转换为IF信号。 IF信号被采样并存储在存储器（192,194）中。 在一个实施例中，存储器由两个交替地接收采样段的存储器组成。 在对一个存储体的写入周期期间，另一个存储器组件将其输出提供给处理器（70）。 这是一个乒乓球方式。 在另一个实施例中，根据需要填充和读取单个存储器组，接收器忽略输入信号，直到处理器已经完成处理在存储器的输出处可用的采样。 这样的接收机在全球定位卫星（GPS）信号处理中是有用的，其中输入信号包含用CDMA编码编码的几个卫星传输。

公开(公告)号：WO03085865A9

公开(公告)日：2004-02-12

申请号：PCT/US0310053

申请日：2003-04-02

Applicant: LOCKHEED CORP ,  TIEMANN JEROME JOHNSON ,  FREY RICHARD LOUIS ,  BARQUIST WILLIAM SVEN JR ,  LOTSHAW WILLIAM TAYLOR ,  FELDMAN SANDRA FREEDMAN ,  SODERBERG JOHN JESSE ,  WHITTAKER GEORGE ALLAN

Inventor： TIEMANN JEROME JOHNSON ,  FREY RICHARD LOUIS ,  BARQUIST WILLIAM SVEN JR ,  LOTSHAW WILLIAM TAYLOR ,  FELDMAN SANDRA FREEDMAN ,  SODERBERG JOHN JESSE ,  WHITTAKER GEORGE ALLAN

IPC: H04B10/12 ,  H04J14/02

CPC classification number: H04B10/25755 ,  H04J14/0298

Abstract: A communication system includes an optical "LAN" (50) interconnecting a plurality of information sources (16a) and sinks (22a) with a light-to-electrical converter (36a) associated with an electrical RF transmitters (32a) and an RF-to-light converter (38a) to a receiver (34a). The transmitter is coupled by way of electrical-to-light converter (46a), and the receiver is coupled by way of light-to-electrical converter (44a), and by way of a directional coupler (76a), to an end of an optical bus (74a), so that light signals representing signals to be transmitted flow in one direction, and light signals representing received signals flow in the other direction through the bus. A directional coupler (72a) at the other end of the optical bus routes the transmit light signals to a light-to-RF converter (47a) which feeds a sink or antenna (12a), and received signals from a source or antenna are routed by way of an RF-to-light converter (40a) and the directional coupler (72a) onto the optical bus (74a).

Abstract translation: 通信系统包括用多个信息源（16a）和信宿（22a）将与电RF发射机（32a）和RF-射频发射机（32a）相关联的光 - 电转换器（36a）互连的光“LAN”（50） （38a）连接到接收器（34a）。 发射机通过电 - 光转换器（46a）耦合，接收机通过光 - 电转换器（44a）和定向耦合器（76a）耦合到 光总线（74a），使得表示要发送的信号的光信号在一个方向上流动，并且表示接收信号的光信号通过总线沿另一方向流动。 在光学总线另一端的定向耦合器（72a）将传输光信号路由到馈送信宿或天线（12a）的光到RF转换器（47a），并且来自源或天线的接收信号被路由 通过RF到光转换器（40a）和定向耦合器（72a）到光总线（74a）上。

公开(公告)号：WO2003085865A1

公开(公告)日：2003-10-16

申请号：PCT/US2003/010053

申请日：2003-04-02

Applicant: LOCKHEED MARTIN CORPORATION ,  TIEMANN, Jerome, Johnson ,  FREY, Richard, Louis ,  BARQUIST, William, Sven, Jr. ,  LOTSHAW, William, Taylor ,  FELDMAN, Sandra, Freedman ,  SODERBERG, John, Jesse ,  WHITTAKER, George, Allan

Inventor： TIEMANN, Jerome, Johnson ,  FREY, Richard, Louis ,  BARQUIST, William, Sven, Jr. ,  LOTSHAW, William, Taylor ,  FELDMAN, Sandra, Freedman ,  SODERBERG, John, Jesse ,  WHITTAKER, George, Allan

IPC: H04B10/12

CPC classification number: H04B10/25755 ,  H04J14/0298

Abstract: A communication system includes an optical "LAN" (50) interconnecting a plurality of information sources (16a) and sinks (22a) with a light-to-electrical converter (36a) associated with an electrical RF transmitters (32a) and an RF-to-light converter (38a) to a receiver (34a). The transmitter is coupled by way of electrical-to-light converter (46a), and the receiver is coupled by way of light-to-electrical converter (44a), and by way of a directional coupler (76a), to an end of an optical bus (74a), so that light signals representing signals to be transmitted flow in one direction, and light signals representing received signals flow in the other direction through the bus. A directional coupler (72a) at the other end of the optical bus routes the transmit light signals to a light-to-RF converter (47a) which feeds a sink or antenna (12a), and received signals from a source or antenna are routed by way of an RF-to-light converter (40a) and the directional coupler (72a) onto the optical bus (74a).

Abstract translation: 通信系统包括用多个信息源（16a）和信宿（22a）将与电RF发射机（32a）和RF-射频发射机（32a）相关联的光 - 电转换器（36a）互连的光“LAN”（50） （38a）连接到接收器（34a）。 发射机通过电 - 光转换器（46a）耦合，接收机通过光 - 电转换器（44a）和定向耦合器（76a）耦合到 光总线（74a），使得表示要发送的信号的光信号在一个方向上流动，并且表示接收信号的光信号通过总线沿另一方向流动。 在光学总线另一端的定向耦合器（72a）将传输光信号路由到馈送信宿或天线（12a）的光到RF转换器（47a），并且来自源或天线的接收信号被路由 通过RF到光转换器（40a）和定向耦合器（72a）到光总线（74a）上。

公开(公告)号：WO9802984A3

公开(公告)日：1998-05-07

申请号：PCT/US9713114

申请日：1997-07-03

Applicant: GEN ELECTRIC ,  TIEMANN JEROME JOHNSON ,  HARRISON DANIEL DAVID

Inventor： TIEMANN JEROME JOHNSON ,  HARRISON DANIEL DAVID

IPC: G01S1/00 ,  G01S5/00 ,  G01S5/14 ,  G01S19/24 ,  G01S19/37 ,  G06F17/15 ,  H04B1/16 ,  H04B1/707 ,  H04B1/708 ,  H04B1/709 ,  H04B1/7107 ,  H04B17/07

CPC classification number: H04B1/708 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0054 ,  G01S19/09 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/707 ,  H04B1/709 ,  H04B1/71075 ,  H04B2201/70709 ,  H04W52/0283 ,  Y02D70/00 ,  Y02D70/164 ,  Y02D70/40

Abstract: A direct sequence spread spectrum architecture permits low power consumption during a synchronization phase of data reception by allowing the receiver to be turned off during most of the acquisition phase of reception, or by using a parallel correlator to keep acquisition time short. The architecture is particularly suitable for global positioning satellite (GPS) signal processing and permits multiple satellite codes and multiple Doppler bins to be searched either sequentially, without requiring the receiver to be turned on during the search process. The receiver output baseband data is sampled and stored over a time interval sufficient to achieve acquisition and synchronization for any one code division multiple access (CDMA) signal at any specific Doppler shift. This sample is digitally recorded and re-played from memory as many times as may be required to acquire and synchronize each desired CDMA signal. To keep processing energy consumption low, an analog (capacitor-based) cross-correlator is used. The order of coherent and non-coherent processing for all code-Doppler channels is chosen to maximize energy efficiency while minimizing required processor hardware.

Abstract translation: 直接序列扩展频谱架构允许在数据接收的同步阶段期间通过允许接收机在接收的大部分接收阶段期间关闭接收机，或通过使用并行相关器来保持采集时间短的低功耗。 该架构特别适用于全球定位卫星（GPS）信号处理，并允许依次搜索多个卫星码和多个多普勒频段，而不需要在搜索过程中接收接收机。 接收机输出基带数据被采样并存储在足以实现任何特定多普勒频移处的任何一个码分多址（CDMA）信号的采集和同​​步的时间间隔。 该采样数据记录并从存储器重新播放多次，以获得并同步每个期望的CDMA信号。 为了保持处理能耗低，使用了模拟（基于电容器的）互相关器。 选择所有代码多普勒通道的相干和非相干处理的顺序，以最大限度地提高能源效率，同时最小化所需的处理器硬件。