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1.发明授权公开(公告)号：US08102897B1
公开(公告)日：2012-01-24
申请号：US12361128
申请日：2009-01-28
IPC分类号： H04B1/69
CPC分类号： H04B1/707 , H04B2201/70703
摘要： Direct sequence spread spectrum communications can use composite codes and can operate at a plurality of different chipping rates. The composite codes can be formed using a plurality of component codes, wherein the component codes can be relatively prime and at least one of the nominal lengths of the component codes can include a plurality of prime number multiplicands. The chipping rate and code length can be reduced by dividing a master rate by one or more of the prime number multiplicands. Symbol timing and time division multiple access timing can be tied to epochs of the component codes.
摘要翻译： 直接序列扩频通信可以使用复合码，并可以以多种不同的码片速率进行操作。 可以使用多个分量代码来形成复合码，其中分量码可以是相对素数，并且分量码的标称长度中的至少一个可以包括多个素数被乘数。 可以通过将主速率除以一个或多个素数被乘数来减少码片速率和码长。 符号定时和时分多址定时可以与组件代码的时代相关联。
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2.发明授权Chip timing synchronization for link that transitions between clear and spread modes 失效用于在清除模式和扩展模式之间转换的链路的芯片定时同步公开(公告)号：US08446931B1
公开(公告)日：2013-05-21
申请号：US13089833
申请日：2011-04-19
IPC分类号： H04B1/00
CPC分类号： H04B1/7073
摘要： Synchronization of a primary link which transitions between clear mode and spread mode is achieved and maintained using a secondary link. When transitioning from clear mode to spread mode, a primary transmission delta phase is adjusted by the difference between a secondary reception delta phase and the primary transmission delta phase; and a primary reception delta phase is adjusted to be equal to a secondary transmission delta phase.
摘要翻译： 使用次级链路实现和维护在清除模式和扩展模式之间转换的主链路的同步。 当从清除模式转换到扩展模式时，通过次级接收增量相位和初级传输增量相位之间的差异来调整初级传输增量相位; 并且主接收增量相位被调整为等于次级传输增量相位。
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公开(公告)号：US07639725B1
公开(公告)日：2009-12-29
申请号：US10811006
申请日：2004-03-26
CPC分类号： H04J13/00 , H04J13/0022 , H04J13/10
摘要： A phase division multiple access (PDMA) system is provided. The PDMA system includes at least one receiver logic combiner adapted to generate a plurality of composite PN codes. Each of the plurality of composite PN codes are derived from a common composite PN code and are separated by a predetermined PN phase.
摘要翻译： 提供了相分多址（PDMA）系统。 PDMA系统包括适于生成多个复合PN码的至少一个接收机逻辑组合器。 多个复合PN码中的每一个从公共复合PN码导出，并被预定的PN相分离。
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公开(公告)号：US07065127B2
公开(公告)日：2006-06-20
申请号：US10058669
申请日：2002-01-28
CPC分类号： H04J13/107 , H04B1/707 , H04J13/0022
摘要： A system for generating (PN) spread signals is provided. The system includes a first clock synchronized with a second clock and at least three first pseudo-noise (PN) component code generators coupled to the first clock. A logic combiner is coupled to the PN component code generators and is adapted to generate a composite PN code. Both clocks are coupled to respective N-bit and M-bit counters.
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公开(公告)号：US07167504B1
公开(公告)日：2007-01-23
申请号：US10352295
申请日：2003-01-27
IPC分类号： H04B1/00
CPC分类号： H04J13/10 , H04B1/707 , H04B1/70735 , H04B2201/70705 , H04J13/0022
摘要： This invention generates pseudo-noise (PN) codes that map a transmitted data rate into the PN code structure. This invention further then acquires the PN code to automatically discover the transmitted data rate. This invention is operable with communication systems that utilize GPS time synchronization of the transmitted and received PN codes, as well as with communication systems where GPS time synchronization is not available. A method and a system are disclosed to transmit a modulated signal from a transmitter to a receiver, where the modulated signal has a data rate. The method includes selecting, to represent the data rate, at least one PN component code from a set of PN component codes. The PN component code is a constituent code of a composite PN code comprised of a plurality of PN component codes. The selected PN component code is one that phase aligns with a PN composite encoded signal. The method further includes modulating the signal to be transmitted using the PN composite code that includes the selected PN component code, receiving the modulated signal, demodulating the received signal using a demodulation process and discovering the data rate during the demodulation process. The demodulation process includes generating instances of a plurality of PN component codes, and correlating the received modulated signal either sequentially or in parallel with the instances of the PN component codes.
摘要翻译： 本发明产生将发送的数据速率映射到PN码结构的伪噪声（PN）码。 本发明还获得PN码以自动发现所发送的数据速率。 本发明可利用利用发送和接收的PN码的GPS时间同步的通信系统以及GPS时间同步不可用的通信系统。 公开了一种将调制信号从发射机发射到接收机的方法和系统，其中调制信号具有数据速率。 该方法包括从一组PN分量代码中选择表示数据速率的至少一个PN分量代码。 PN分量代码是由多个PN分量代码组成的复合PN代码的组成代码。 选择的PN分量代码是与PN复合编码信号相位相位的代码。 该方法还包括使用包括所选择的PN分量码的PN复合码来调制要发送的信号，接收调制信号，使用解调处理解调接收的信号，并在解调过程中发现数据速率。 解调过程包括产生多个PN分量代码的实例，并且将接收到的调制信号顺序地或与PN分量代码的实例并行地相关联。
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公开(公告)号：US06944211B2
公开(公告)日：2005-09-13
申请号：US10085610
申请日：2002-02-26
CPC分类号： H04B1/7085
摘要： A method and system for generating a data clock having edge coincidence with an aggregate PN code is provided. The method includes providing an aggregate PN code generator having an epoch output for resetting a data clock generator when the aggregate PN code generator generates an epoch signal. Between resets the data clock generator divides a PN master clock signal with a divisor derived from the prime factor(s) of one or two of PN codes used to form the aggregate PN code.
摘要翻译： 提供了一种用于产生与聚合PN码具有边缘一致性的数据时钟的方法和系统。 该方法包括：提供具有时标输出的聚合PN码发生器，用于当聚合PN码发生器产生时标信号时复位数据时钟发生器。 在复位之间，数据时钟发生器将PN主时钟信号与从用于形成聚合PN码的一个或两个PN码的素因子导出的除数分开。
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7.发明授权公开(公告)号：US07403583B1
公开(公告)日：2008-07-22
申请号：US10369229
申请日：2003-02-19
IPC分类号： H04L7/00
CPC分类号： H04B1/7075
摘要： A system and method for using Psuedo-Noise (PN) phase to determine frame start of a data frame is provided. The system and method includes at least two PN component codes, wherein the at least two PN component codes are relatively prime. A received PN composite encoded signal is correlated with at least one of the PN component codes and a frame start is determined. With reference to frame start at least one training sequence bit is located. The training bits may be overwritten on FEC encoded frame data such that a FEC decoder may be used to recover data overwritten by the training sequence bit(s).
摘要翻译： 提供了一种使用Psuedo-Noise（PN）相位来确定数据帧的帧起始的系统和方法。 该系统和方法包括至少两个PN分量代码，其中至少两个PN分量代码是相对素数。 接收的PN复合编码信号与PN分量代码中的至少一个相关，并且确定帧起始。 参考帧开始，至少定位一个训练序列位。 可以在FEC编码的帧数据上覆盖训练比特，使得FEC解码器可以用于恢复由训练序列比特重写的数据。
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公开(公告)号：US07133395B2
公开(公告)日：2006-11-07
申请号：US09827760
申请日：2001-04-06
摘要： A communications system comprising a central node, at least one remote node and a communications link. The remote node is adapted to receive information transmitted from the central node over a broadcast link and the communications link is adapted to convey information from the remote node to the central node. The central node is adapted to dynamically tailor a remote node transmit power control and a bandwidth as requested by the remote node for conveying information over the communications link.
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9.发明授权High rate, time division multiplexed, multi-MPSK MODEM with imbedded high signal-to-noise ratio tracking channel 失效高速率，时分复用，具有嵌入式高信噪比跟踪通道的多MPSK调制解调器公开(公告)号：US07161920B2
公开(公告)日：2007-01-09
申请号：US10292141
申请日：2002-11-12
CPC分类号： H04B1/707 , H04B2201/70701 , H04L27/18
摘要： A novel MODEM and method of operating a MODEM usable in spread spectrum communication utilizing multiple waveforms in orthogonal spread signals imbeds a tracking signal in one of the spread signals for efficient tracking by a receiver so that both spread signals can have wideband characteristics. Therefore, one spread signal contains a tracking channel and a wideband channel, allowing for higher order modulation in the wideband channel for transmitting information, while still providing good tracking features. The second spread signal is an orthogonal wideband channel serving as the main high data rate conduit. In the preferred embodiment, the first portion of the waveform (in the first spread signal) is modulated using Bi-Bi-Phase Shift Keying (Bi-BPSK), while the second portion of the waveform (in the second spread signal) is modulated using Multiple Phase Shift Keying (MPSK). The two waveform portions are Time Division Multiplexed (TDM) at the chipping rate. A higher overall data bandwidth can be achieved for the Bi-BPSK modulation technique using the same channel bandwidth.
摘要翻译： 使用在正交扩展信号中利用多个波形的可用于扩展频谱通信的MODEM的新型MODEM和方法在一个扩展信号中嵌入跟踪信号，以便接收机有效跟踪，使得两个扩展信号都可以具有宽带特性。 因此，一个扩展信号包含跟踪信道和宽带信道，允许宽带信道中的更高阶调制用于传输信息，同时仍然提供良好的跟踪特征。 第二扩展信号是用作主高数据速率管道的正交宽带信道。 在优选实施例中，波形的第一部分（在第一扩展信号中）使用Bi-Bi相移键控（Bi-BPSK）进行调制，而波形的第二部分（在第二扩展信号中）被调制 使用多相移键控（MPSK）。 两个波形部分是切分率的时分复用（TDM）。 对于使用相同信道带宽的Bi-BPSK调制技术，可以实现更高的总体数据带宽。
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