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    Communications signal transcoder
    1.
    发明授权
    Communications signal transcoder 有权
    通信信号转码器

    公开(公告)号：US08014449B2

    公开(公告)日：2011-09-06

    申请号：US12825893

    申请日：2010-06-29

    申请人： Alan Y. Kwentus ,  Charles Alan Brooks ,  Steven T. Jaffe ,  Stephen Edward Krafft

    发明人： Alan Y. Kwentus ,  Charles Alan Brooks ,  Steven T. Jaffe ,  Stephen Edward Krafft

    IPC分类号： H04N7/12

    CPC分类号： H04N21/2383 ,  H04N21/4382

    摘要： Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e.g., 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e.g., QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.

    摘要翻译： 通信信号转码器。 提供了将信号从第一信号类型转换为第二信号类型的解决方案，以确保可以使用不同信号类型操作的设备之间的适当接口。 例如，在通信系统中，可以接收第一信号类型（具有第一调制类型，例如8PSK）。 代码转换器然后确保该信号经过任何初始处理（诸如调谐，下变换，解码等等）之后被编码为第二信号类型（具有第二调制类型，例如QPSK），例如 它可以与接收到的信号的设备正确连接。 该代码转换器功能可以在分立组件内实现，或者可选地集成在集成电路的功能块内。 该功能可以在包括卫星，有线电视，因特网等的各种通信系统中实现。

    Communications signal transcoder
    2.
    发明申请
    Communications signal transcoder 有权
    通信信号转码器

    公开(公告)号：US20100267330A1

    公开(公告)日：2010-10-21

    申请号：US12825893

    申请日：2010-06-29

    申请人： Alan Y. Kwentus ,  Charles Alan Brooks ,  Steven Jaffe ,  Stephen Edward Krafft

    发明人： Alan Y. Kwentus ,  Charles Alan Brooks ,  Steven Jaffe ,  Stephen Edward Krafft

    IPC分类号： H04H20/74

    CPC分类号： H04N21/2383 ,  H04N21/4382

    摘要： Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e.g., 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e.g., QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.

    摘要翻译： 通信信号转码器。 提供了将信号从第一信号类型转换为第二信号类型的解决方案，以确保可以使用不同信号类型操作的设备之间的适当接口。 例如，在通信系统中，可以接收第一信号类型（具有第一调制类型，例如8PSK）。 代码转换器然后确保该信号经过任何初始处理（诸如调谐，下变换，解码等等）之后被编码为第二信号类型（具有第二调制类型，例如QPSK），例如 它可以与接收到的信号的设备正确连接。 该代码转换器功能可以在分立组件内实现，或者可选地集成在集成电路的功能块内。 该功能可以在包括卫星，有线电视，因特网等的各种通信系统中实现。

    Multi-mode variable rate digital satellite receiver
    3.
    发明授权
    Multi-mode variable rate digital satellite receiver 失效
    多模变频数字卫星接收机

    公开(公告)号：US06714608B1

    公开(公告)日：2004-03-30

    申请号：US09013964

    申请日：1998-01-27

    申请人： Henry Samueli ,  Alan Y. Kwentus ,  Thomas D. Kwon

    发明人： Henry Samueli ,  Alan Y. Kwentus ,  Thomas D. Kwon

    IPC分类号： H04L2706

    CPC分类号： H04H40/90 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0057

    摘要： Carrier signals are modulated by information (e.g., television) signals in a particular frequency range. The information signals are oversampled at a first frequency greater than any of the frequencies in the particular frequency range to provide digital signals at a second frequency. The digital signals are introduced to a carrier recovery loop which provides a feedback to regulate the frequency of the digital signals at the second frequency. The digital signals are introduced to a symbol recovery loop which provides a feedback to maintain the time for the production of the digital signals in the middle of the data signals. The gain of the digital signals is also regulated in a feedback loop. The digital signals are processed to recover the data in the data signals. By providing digital feedbacks, the information recovered from the digital signals can be quite precise. In one embodiment, the carrier signals are demodulated to produce baseband inphase and quadrature signals. The inphase and quadrature signals are then oversampled and regulated in the feedback loops as described above. In a second embodiment, the carrier signals downconverted to produce intermediate frequency signals which are oversampled to produce the digital signals at the second frequency without producing the inphase and quadrature signals. The oversampled signals are then regulated in the feedback loops as described above. In a third embodiment, the carrier signals are oversampled without being downconverted and without producing the inphase and quadrature signals.

    摘要翻译： 载波信号由特定频率范围内的信息（例如电视）信号调制。 以大于特定频率范围内的任何频率的第一频率对信息信号进行过采样，以提供第二频率的数字信号。 数字信号被引入载波恢复回路，其提供反馈以调节第二频率处的数字信号的频率。 数字信号被引入到符号恢复循环，其提供反馈以保持在数据信号中间产生数字信号的时间。 数字信号的增益也在反馈环路中调节。 处理数字信号以恢复数据信号中的数据。 通过提供数字反馈，从数字信号中恢复的信息可以相当精确。 在一个实施例中，载波信号被解调以产生基带同相和正交信号。 然后如上所述，在反馈回路中对同相和正交信号进行过采样和调节。 在第二实施例中，载波信号被下变频以产生过采样的中频信号，以在第二频率产生数字信号，而不产生同相和正交信号。 如上所述，过采样信号在反馈回路中被调节。 在第三实施例中，载波信号被过采样而不进行下变频，而不产生同相和正交信号。

    Method and apparatus for direct digital frequency synthesizer
    4.
    发明授权
    Method and apparatus for direct digital frequency synthesizer 失效
    直接数字频率合成器的方法和装置

    公开(公告)号：US5737253A

    公开(公告)日：1998-04-07

    申请号：US521173

    申请日：1995-08-30

    申请人： Avanindra Madisetti ,  Alan Y. Kwentus

    发明人： Avanindra Madisetti ,  Alan Y. Kwentus

    IPC分类号： G06F1/03 ,  G06F7/544 ,  G06F1/02

    CPC分类号： G06F7/5446 ,  G06F1/0328

    摘要： The present invention comprises a direct digital frequency synthesizer. A phase accumulator provides a normalized angle .theta. to a sine/cosine generator that outputs the value of the sine/cosine function at the provided angle. The she/cosine generator in a preferred embodiment comprises a plurality of multiplierless butterfly and carry-save stages in cascade that perform angle rotations on a phasor on the unit circle whose x and y coordinates correspond to cosine and sine values. To calculate the sine and cosine values at a particular angle .theta.=b.sub.1 .theta..sub.1 +b.sub.2 .theta..sub.2 +. . . +b.sub.N .theta..sub.N where b.sub.k .epsilon. {0, 1} are the binary bits and the .theta..sub.k =2.sup.-k are the associated positional weights, each of the butterfly and carry-save stages rotate the phasor by an amount .theta..sub.k =2.sup.-k. The direction of the rotation, clockwise or counter-clockwise, depends upon the value of the binary bits b.sub.k. After undergoing all of the rotations, the phasor has x and y coordinates that approximate the desired cosine and sine values to a specified accuracy. In a preferred embodiment, the datapath of the present invention is multiplierless. The stages for angles where the approximation tan .theta..sub.k =.theta..sub.k is acceptable are multiplierless while for angles where this approximation does not hold, the x and y phasor coordinates are transformed through a multiplexer or a ROM.

    摘要翻译： 本发明包括直接数字频率合成器。 相位累加器向正弦/余弦发生器提供归一化角度+ E，ovsθ+ EE，其以所提供的角度输出正弦/余弦函数的值。 在优选实施例中，她/余弦发生器包括级联的多个无乘法器蝴蝶和进位保存级，其在x和y坐标对应于余弦和正弦值的单位圆上的相量上执行角度旋转。 计算特定角度θ= b1θ1 + b 2 + 2的正弦和余弦值。 。 。 + bNθN其中bkε{0,1}是二进制位，θk = 2-k是相关联的位置权重，每个蝶形和进位保存级将相量旋转量θk = 2- k。 顺时针或逆时针旋转的方向取决于二进制位bk的值。 经历了所有旋转之后，相量具有将所需余弦值和正弦值近似为指定精度的x和y坐标。 在优选实施例中，本发明的数据路径是无乘数的。 近似tanθk =θk可接受的角度的阶段是无乘数的，而对于该近似不成立的角度，x和y相量坐标通过多路复用器或ROM进行变换。

    Communications signal transcoder
    5.
    发明授权
    Communications signal transcoder 失效

    公开(公告)号：US07751477B2

    公开(公告)日：2010-07-06

    申请号：US10736434

    申请日：2003-12-15

    申请人： Alan Y. Kwentus ,  Charles Alan Brooks ,  Steven Jaffe ,  Stephen Edward Krafft

    发明人： Alan Y. Kwentus ,  Charles Alan Brooks ,  Steven Jaffe ,  Stephen Edward Krafft

    IPC分类号： H04N7/12 ,  H04H20/74

    CPC分类号： H04N21/2383 ,  H04N21/4382

    摘要： Communications signal transcoder. A solution is provided to transcode a signal from a first signal type to a second signal type to ensure proper interfacing between devices that may operate using different signal types. For example, within a communication system, a first signal type (having a first modulation type, e.g., 8 PSK) may be received. The transcoder then ensures that this signal, after it has undergone any initial processing (such as tuning, down-converting, decoding, and so on), is encoded into a second signal type (having a second modulation type, e.g., QPSK) such that it can interface properly with a device for which the received signal is intended. This transcoder functionality may be implemented within discrete components, or it may alternatively be integrated within a functional block of an integrated circuit. This functionality may be implemented in a variety of communication systems including satellite, cable television, Internet, and others.

    Multi-mode variable rate digital satellite receiver
    10.
    发明授权
    Multi-mode variable rate digital satellite receiver 有权
    多模变频数字卫星接收机

    公开(公告)号：US07302013B2

    公开(公告)日：2007-11-27

    申请号：US10747931

    申请日：2003-12-30

    申请人： Henry Samueli ,  Alan Y. Kwentus ,  Thomas D. Kwon

    发明人： Henry Samueli ,  Alan Y. Kwentus ,  Thomas D. Kwon

    IPC分类号： H03K9/00

    CPC分类号： H04H40/90 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0057

    摘要： Digital signal processing for television signals includes digital feedback loops. Analog information signals are oversampled to provide digital signals. The digital signals are introduced to a digital carrier recovery loop and a digital symbol recovery loop. The gain of the digital signals is also regulated in a feedback loop. The digital signals are processed to recover the data in the data signals. The use of digital feedback loops allows information recovered from the digital signals to be precise. Carrier signals can be directly demodulated to produce baseband inphase and quadrature signals, or first downconverted to produce intermediate frequency signals.

    摘要翻译： 电视信号的数字信号处理包括数字反馈回路。 模拟信息信号被过采样以提供数字信号。 数字信号被引入到数字载波恢复环路和数字符号恢复环路。 数字信号的增益也在反馈环路中调节。 处理数字信号以恢复数据信号中的数据。 使用数字反馈回路允许从数字信号中恢复的信息是精确的。 载波信号可以被直接解调以产生基带同相和正交信号，或者首先下变频以产生中频信号。