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    Block spectrum receiver for a broadband communications system
    4.
    发明授权
    Block spectrum receiver for a broadband communications system 失效
    用于宽带通信系统的频谱接收机

    公开(公告)号：US5930231A

    公开(公告)日：1999-07-27

    申请号：US625399

    申请日：1996-03-27

    申请人： Kevin L. Miller ,  Ramin Borazjani

    发明人： Kevin L. Miller ,  Ramin Borazjani

    IPC分类号： H04N7/10 ,  H04B1/26 ,  H04H20/34 ,  H04H20/42 ,  H04H20/79 ,  H04H20/80 ,  H04H40/27 ,  H04H60/97 ,  H04J11/00 ,  H04L5/02 ,  H04L5/14 ,  H04L7/02 ,  H04L12/28 ,  H04M3/00 ,  H04M7/00 ,  H04M7/12 ,  H04M9/02 ,  H04N7/173 ,  H04J1/00 ,  H04J3/16

    CPC分类号： H04H20/80 ,  H04H20/34 ,  H04H20/42 ,  H04H20/79 ,  H04H40/27 ,  H04H60/97 ,  H04L12/2801 ,  H04L5/023 ,  H04L5/143 ,  H04M7/006 ,  H04N7/10 ,  H04N7/17309 ,  H04L7/0062 ,  H04M7/12 ,  H04M9/027

    摘要： A communication system for coupling telephony or other signals to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers upstream to a headend unit (HIU) are modulated onto the reverse band of the broadband network in a frequency division multiple access (FDMA) arrangement. The upstream modulated telephony signals are received at a telephony network interface at the HIU coupled to the broadband network. A group of reverse band modulated telephony signals are received at a group receiver or channelizer. The group receiver processes all upstream telephony signals within a selected spectral subband in the reverse band to apply a receiver matched filter with a weighted overlap and add circuit, and are then converted to baseband by an FFT circuit. The group receiver provides a serial data stream representing the baseband telephony signals. The baseband telephony signals are processed to derive demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.

    摘要翻译： 用于将电话或其他信号耦合到诸如CATV网络的宽带网络的通信系统。 该系统在宽带网络的前向频带中发送电话信号的复用，其中各个信号被定向到寻址的用户。 从用户上游返回到前端单元（HIU）的电话信号在频分多址（FDMA）布置中被调制到宽带网络的反向频带上。 在耦合到宽带网络的HIU处的电话网络接口处接收上行调制电话信号。 一组反向频带调制电话信号在组接收机或信道发送器处被接收。 组接收机处理反向频带内所选择的频谱子带内的所有上行电话信号，以将具有加权重叠和相加电路的接收机匹配滤波器应用于FFT电路。 组接收器提供表示基带电话信号的串行数据流。 处理基带电话信号以导出解调的电话信号。 解调的电话信号耦合到电话网络。

    Message collision handling
    5.
    发明申请
    Message collision handling 审中-公开
    消息碰撞处理

    公开(公告)号：US20080239975A1

    公开(公告)日：2008-10-02

    申请号：US11728752

    申请日：2007-03-27

    申请人： Alan K. Hunt ,  Ramin Borazjani

    发明人： Alan K. Hunt ,  Ramin Borazjani

    IPC分类号： H04J1/16

    CPC分类号： H04L1/0045 ,  H04W4/12 ,  H04W74/08

    摘要： A collision handling receiver for use in a data communication network. The collision handling system and method comprises collision handling receivers together with transmitters inserting pseudo-random delays. Accordingly, multiple sources may transmit simultaneous messages to a receiver so that the messages arrive with varying signal levels and times of arrival. The receiver sorts the symbols into separate sequences by grouping together symbols having similar time of arrival. In addition, the receiver retains the sequences with sufficiently reliable symbol detection, for example, when 75% of the symbols in a sequence are detected with sufficient quality. Receiver then ranks the retained transmitters by received signal level and decodes the messages from transmitters with highest received signal level.

    摘要翻译： 一种用于数据通信网络的冲突处理接收器。 冲突处理系统和方法包括冲突处理接收器和发射机插入伪随机延迟。 因此，多个源可以将同时的消息发送到接收机，使得消息到达具有变化的信号电平和到达时间。 接收者通过将具有相似的到达时间的符号分组在一起来将符号分类成单独的序列。 此外，接收器保留具有足够可靠的符号检测的序列，例如，当以足够的质量检测到序列中的75％的符号时。 接收器然后通过接收信号电平对保留的发射机进行排序，并从具有最高接收信号电平的发射机解码消息。

    Modulator for a broadband communications system
    6.
    发明授权
    Modulator for a broadband communications system 失效
    用于宽带通信系统的调制器

    公开(公告)号：US5825829A

    公开(公告)日：1998-10-20

    申请号：US497458

    申请日：1995-06-30

    申请人： Ramin Borazjani ,  Kevin Lee Miller

    发明人： Ramin Borazjani ,  Kevin Lee Miller

    IPC分类号： H04N7/16 ,  H04B10/20 ,  H04H20/46 ,  H04H20/78 ,  H04H60/94 ,  H04H60/97 ,  H04J1/00 ,  H04J4/00 ,  H04L5/02 ,  H04L12/28 ,  H04L27/18 ,  H04L27/26 ,  H04N7/10 ,  H04L27/20 ,  H04H1/08

    CPC分类号： H04H20/46 ,  H04H20/78 ,  H04H60/94 ,  H04H60/97 ,  H04J4/005 ,  H04L12/2801 ,  H04L27/2627 ,  H04N7/10

    摘要： A multi-channel modulator for the transmission of telephony signals within a broadband communication system. An interpolation module generates processed I and Q signal components by upsampling filtered I and Q signal components. In turn, these processed I and Q signal components output by a filter are passed to a set of channel modulators. Each channel modulator accepts a pair of processed I and Q signal components and, in response, modulates a selected carrier signal with one of the telephony signals to produce a complex modulated signal. An adder module responds to the complex modulated signals by summing the real signal components to produce a real resultant signal, and to sum the imaginary components to produce an imaginary resultant signal. A digital-to-analog converter (DAC) module coverts the real resultant signal and the imaginary resultant signal, which are represented by digital data streams, to analog signals. A transmitter, responsive to the analog signals, transmits the modulated signals within a frequency band of the broadband communications network.

    摘要翻译： 一种用于在宽带通信系统内传输电话信号的多信道调制器。 内插模块通过对经滤波的I和Q信号分量进行上采样来产生经处理的I和Q信号分量。 反过来，由滤波器输出的这些经处理的I和Q信号分量被传递到一组信道调制器。 每个信道调制器接受一对经处理的I和Q信号分量，并且作为响应，用电话信号中的一个调制所选择的载波信号以产生复调制信号。 加法器模块通过对实数信号分量进行求和以产生真实的合成信号来对复调制信号进行响应，并将虚分量相加以产生虚数合成信号。 数模转换器（DAC）模块将由数字数据流表示的实际结果信号和虚拟合成信号覆盖到模拟信号。 响应于模拟信号的发射机在宽带通信网络的频带内发送调制信号。

    Plural telephony channel baseband signal demodulator for a broadband communications system
    7.
    发明授权
    Plural telephony channel baseband signal demodulator for a broadband communications system 失效
    用于宽带通信系统的多种电话信道基带信号解调器

    公开(公告)号：US5719867A

    公开(公告)日：1998-02-17

    申请号：US497555

    申请日：1995-06-30

    申请人： Ramin Borazjani

    发明人： Ramin Borazjani

    IPC分类号： H04H20/34 ,  H04H20/42 ,  H04H20/79 ,  H04H20/80 ,  H04H40/27 ,  H04H60/97 ,  H04L5/02 ,  H04L5/14 ,  H04L7/02 ,  H04L12/28 ,  H04M3/00 ,  H04M7/00 ,  H04M7/12 ,  H04M9/02 ,  H04N7/10 ,  H04N7/173 ,  H04H1/08

    CPC分类号： H04H20/80 ,  H04H20/34 ,  H04H20/42 ,  H04H20/79 ,  H04H40/27 ,  H04H60/97 ,  H04L12/2801 ,  H04L5/023 ,  H04L5/143 ,  H04M7/006 ,  H04N7/10 ,  H04N7/17309 ,  H04L7/0062 ,  H04M7/12 ,  H04M9/027

    摘要： A communication system for coupling telephony or other digital networks to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers are modulated onto the reverse band of the broadband network in a frequency division multiplex (FDM). The modulated telephony signals are received at a telephony network interface coupled to the broadband network. A selected plurality of modulated telephony signals are frequency shifted to baseband. The baseband-shifted telephony signals are sampled to generate a plurality of time division multiple access telephony signal samples. A plurality of time division multiple access telephony signal samples are channelized into a serial data stream with a channelizer. The serial data stream is processed with a single digital signal processor (DSP) to derive a plurality of demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.

    摘要翻译： 一种用于将电话或其他数字网络耦合到诸如CATV网络之类的宽带网络的通信系统。 该系统在宽带网络的前向频带中发送电话信号的复用，其中各个信号被定向到寻址的用户。 从频分复用（FDM）调制从用户返回的电话信号到宽带网络的反向频带。 调制电话信号在耦合到宽带网络的电话网络接口处被接收。 所选择的多个调制电话信号被频移到基带。 基带移位电话信号被采样以产生多个时分多址电话信号样本。 多个时分多址电话信号样本被信道化为具有信道化器的串行数据流。 用单个数字信号处理器（DSP）处理串行数据流以导出多个解调的电话信号。 解调的电话信号耦合到电话网络。