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    • 3. 发明授权
    • Method and apparatus for signal separation
    • 信号分离方法和装置
    • US07356075B2
    • 2008-04-08
    • US10853376
    • 2004-05-24
    • Chad Scott BergstromGhassan Chehade MaalouliJeffery Scott Chuprun
    • Chad Scott BergstromGhassan Chehade MaalouliJeffery Scott Chuprun
    • H04B1/00
    • H04B1/7075H04B1/71H04B2201/70715
    • An embodiment of a method for parameterizing an input signal includes non-linearly transforming the input signal, removing higher order terms by passing the input signal through a low pass filter to produce a linear combination of data symbols and DC components, solving for the DC components, separating a plurality of mixed baseband signals from the input signal, and coordinate transforming each of the separated signals from polar coordinates to Cartesian coordinates. An embodiment of a receiver includes a non-linear transform operator receiving a digitized input signal and adapted to produce a linear combination of data symbols, DC components, and carrier effects; a low-pass filter for removing higher order terms; a separator unit for separating the plurality of mixed baseband signals; and a coordinate transform for converting the separated signals from polar coordinates to Cartesian coordinates.
    • 用于参数化输入信号的方法的实施例包括非线性变换输入信号,通过使输入信号通过低通滤波器来消除高阶项,以产生数据符号和DC分量的线性组合,求解DC分量 从输入信号中分离出多个混合基带信号,并将每个分离的信号从极坐标变换到笛卡尔坐标。 接收机的实施例包括接收数字化输入信号并适于产生数据符号,DC分量和载波效应的线性组合的非线性变换算子; 用于去除高阶项的低通滤波器; 用于分离所述多个混合基带信号的分离器单元; 以及用于将从极坐标分离的信号转换为笛卡尔坐标的坐标变换。
    • 5. 发明授权
    • Method and apparatus for distributed polyphase spread spectrum communications
    • 分布式多相扩频通信的方法和装置
    • US07327777B2
    • 2008-02-05
    • US10871442
    • 2004-06-17
    • Chad Scott BergstromJeffery Scott ChuprunSteve ArnesonHugh Robert Malone
    • Chad Scott BergstromJeffery Scott ChuprunSteve ArnesonHugh Robert Malone
    • H04B1/00
    • H04B1/7102
    • Methods and apparatus are provided for distributed polyphase spread spectrum communication and non-contiguous spectrum underlay. The method includes polyphase channelizing a direct sequence spread spectrum (DSSS) signal, determining available spectrum in an observed frequency range having a noise floor based on detection of polyphase users below the noise floor, distributing the polyphase channelized signal among the available spectrum, and interference mitigation using a combination of standard signal detection and cyclostationary feature detection methods. The apparatus includes: a first processor adapted to polyphase channelize a code division multiple access (CDMA) spectrum and a digitized RF bandwidth containing a discontiguous polyphase waveform distribution; a second processor adapted to detect occupied bands, interferers and polyphase users in a spectrum and determine discontiguous frequency opportunities based on the detected interferers and polyphase users; and a third processor adapted to allocate the polyphase channelized CDMA spectrum among available spectrum based on the discontiguous frequency opportunities.
    • 提供了分布式多相扩频通信和非连续频谱图的方法和装置。 该方法包括多相通道化直接序列扩展频谱(DSSS)信号,基于在本底噪声以下的多相用户的检测,在可用频谱内分布多相信道化信号和干扰信号,确定具有噪声基底的观测频率范围内的可用频谱 使用标准信号检测和循环平稳特征检测方法的组合进行缓解。 该装置包括:第一处理器,其适于多路信道化码分多址(CDMA)频谱和包含不连续多相波形分布的数字化RF带宽; 适于检测频谱中的占用频带,干扰源和多相用户的第二处理器,并且基于检测到的干扰信号和多相用户来确定不连续的频率机会; 以及第三处理器,其适于基于所述不连续的频率机会在可用频谱内分配所述多相信道化CDMA频谱。
    • 8. 发明授权
    • Method and apparatus for seamless multi-rate speech coding
    • 无缝多速率语音编码的方法和装置
    • US06496794B1
    • 2002-12-17
    • US09447315
    • 1999-11-22
    • John Eric KleiderJeffery Scott ChuprunRichard James PattisonChad BergstromByron Tarver
    • John Eric KleiderJeffery Scott ChuprunRichard James PattisonChad BergstromByron Tarver
    • G10L2100
    • G10L19/24
    • A communications system (100) includes a multi-rate source coder (MRSC) (102), a variable size/rate buffer (VSRB) (112), a speech buffer (104), and a buffer control block (106). The variable size/rate buffer (112) includes a source coder bit buffer (SCBB) (114) and an adaptive transmit frame buffer (116). The source coder bit buffer (114) receives speech frames coded at different rates from the multi-rate source coder (102), and deposits an integer or non-integer number of frames in the adaptive transmit frame buffer (ATFB) (116). A receiver includes a seamless rate transition module (SRTM) (308) and an variable buffer (310). The seamless rate transition module (308) correlates speech data previously coded at different rates, and it then truncates or alternatively appends, concatenates, and warps the speech data to remove any annoying artifacts at the rate change boundary.
    • 通信系统(100)包括多速率源编码器(MRSC)(102),可变大小/速率缓冲器(VSRB)(112),语音缓冲器(104)和缓冲器控制块(106)。 可变大小/速率缓冲器(112)包括源编码器位缓冲器(SCBB)(114)和自适应传输帧缓冲器(116)。 源编码器位缓冲器(114)从多速率源编码器(102)接收以不同速率编码的语音帧,并且在自适应发射帧缓冲器(ATFB)中存储整数或非整数个帧(116)。 接收机包括无缝速率转换模块(SRTM)(308)和可变缓冲器(310)。 无缝速率转换模块(308)将先前以不同速率编码的语音数据相关联,然后截断或替代地附加,连接和扭曲语音数据,以消除速率变化边界处的任何烦人的伪影。
    • 9. 发明授权
    • Wireless access unit utilizing adaptive spectrum exploitation
    • 利用自适应频谱开发的无线接入单元
    • US06385434B1
    • 2002-05-07
    • US09153976
    • 1998-09-16
    • Jeffery Scott ChuprunChad S. BergstromByron TarverBennett C. Beaudry
    • Jeffery Scott ChuprunChad S. BergstromByron TarverBennett C. Beaudry
    • H04B710
    • H04W16/10H04W16/14H04W84/14
    • A wireless access unit (12) for providing an interface between a satellite communications system (32) and a plurality of terrestrial user devices (14-26) in a centralized or distributed architecture includes a spectrum allocation unit (92) for dynamically allocating spectrum to the plurality of terrestrial user devices (14-26) based on a spectral environment about the wireless access unit (12). A spectrum scan unit (60) scans the spectral environment about the wireless access unit (12) and generates a spectrum signal indicative thereof. An environment understanding unit (61) provides signal information corresponding to signal emitters in proximity to the distributed or centralized network. A spectrum table (90) assembles data related to the spectral environment and the proximity emitters for use by the spectrum allocation unit (92) in dynamically allocating spectrum.
    • 用于在集中或分布式架构中提供卫星通信系统(32)和多个地面用户设备(14-26)之间的接口的无线接入单元(12)包括:频谱分配单元(92),用于动态分配频谱 所述多个地面用户设备(14-26)基于关于所述无线接入单元(12)的频谱环境。 频谱扫描单元(60)扫描关于无线接入单元(12)的频谱环境,并产生指示它的频谱信号。 环境理解单元(61)提供对应于分布式或集中式网络附近的信号发射器的信号信息。 频谱表(90)组合与频谱环境有关的数据和邻近发射器,供频谱分配单元(92)动态分配频谱。
    • 10. 发明授权
    • Distributed packet communication network
    • 分布式分组通信网络
    • US06301239B1
    • 2001-10-09
    • US08991822
    • 1997-12-17
    • Jeffery Scott ChuprunMargaret Reed EnnisDavid Michael Harrison
    • Jeffery Scott ChuprunMargaret Reed EnnisDavid Michael Harrison
    • H04B7216
    • H04W74/0841H04B2201/709709H04W16/14
    • A multiple access and data channel scheme is presented for reducing network communication collisions and susceptibility to jamming signals in a distributed network to increase network connectivity and communication throughput. An order wire channel (202) is used to gain access to a data channel (204). To gain access to the data channel (204), a source radio sends a transmit probe (TXP) over the order wire channel (202) to the target radio. The target radio senses its environment and responds with a receive probe (RXP) which comprises data channel transmission parameters including the data channel frequency, transmit power, spread code, and transit timing to be used for the data transmission. Source radio moves to the data channel using the data channel transmission parameters specified by the receive probe (RXP) to communicate with the target radio. If a collision occurs of the order wire channel (202), the source radio retransmits the transmit probe after a random time period.
    • 提出了一种多址和数据信道方案,用于减少分布式网络中的网络通信冲突和对干扰信号的敏感性,以增加网络连接性和通信吞吐量。 订单有线信道(202)用于获得对数据信道(204)的访问。 为了获得对数据信道(204)的访问,源无线电通过订单有线信道(202)向目标无线电发送发送探测(TXP)。 目标无线电感测其环境,并用包括数据信道频率,发射功率,扩展码和传输时间的数据信道传输参数的接收探测器(RXP)进行响应,以用于数据传输。 源无线电使用由接收探针(RXP)指定的数据信道传输参数与目标无线电进行通信。 如果订单有线信道(202)发生冲突,则源无线电在随机时间段之后重发发送探测器。