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    Systems and methods for implementing peak-to-average power ratio reduction for OFDMA modulation
    1.
    发明授权
    Systems and methods for implementing peak-to-average power ratio reduction for OFDMA modulation 有权
    实现OFDMA调制的峰均功率比降低的系统和方法

    公开(公告)号：US08982724B2

    公开(公告)日：2015-03-17

    申请号：US13716534

    申请日：2012-12-17

    Applicant: Bernard Arambepola ,  Parveen Shukla ,  Thushara Hewavithana ,  Sahan Gamage

    Inventor： Bernard Arambepola ,  Parveen Shukla ,  Thushara Hewavithana ,  Sahan Gamage

    IPC: H04B7/04 ,  H04L27/26

    CPC classification number: H04L27/2614 ,  H04L5/0044

    Abstract: A system and method are provided for implementing a peak-to-average power ratio (PAPR) reduction scheme for Orthogonal Frequency-Division Multiple Access (OFDMA) modulation. A unique PAPR reduction scheme for OFDMA modulation for systems operated according to a DOCSIS standard achieves results similar to those attributable to tone reservation schemes in a manner that does not negatively affect an amount of available data capacity, particularly in implementations with limited numbers of subcarriers. The disclosed systems and methods are particularly adaptable to next generation cable gateways and/or next generation cable modems. These next generation cable gateways and/or cable modems may find particular utility in advanced hybrid fiber/coaxial cable systems. The adaptable cable gateways/modems may include a cable gateway system-on-chip (SOC) configuration. The disclosed schemes may be applicable to OFDM modulation. For OFDM, however, the known tone reservation algorithms also may be employed.

    Abstract translation: 提供了一种用于实现正交频分多址（OFDMA）调制的峰均功率比（PAPR）降低方案的系统和方法。 用于根据DOCSIS标准操作的系统的OFDMA调制的独特的PAPR降低方案实现了类似于对于音调预留方案的结果的结果，其结果不会不利地影响可用数据容量的数量，特别是在具有有限数目的子载波的实现中。 所公开的系统和方法特别适用于下一代电缆网关和/或下一代电缆调制解调器。 这些下一代电缆网关和/或电缆调制解调器可以在先进的混合光纤/同轴电缆系统中发现特定的用途。 可适应性的电缆网关/调制解调器可以包括电缆网关片上系统（SOC）配置。 所公开的方案可以适用于OFDM调制。 然而，对于OFDM，也可以采用已知的音调预留算法。

    SYSTEMS AND METHODS FOR IMPLEMENTING PEAK-TO-AVERAGE POWER RATIO REDUCTION FOR OFDMA MODULATION
    3.
    发明申请
    SYSTEMS AND METHODS FOR IMPLEMENTING PEAK-TO-AVERAGE POWER RATIO REDUCTION FOR OFDMA MODULATION 有权
    用于实施OFDMA调制的峰值平均功率比减少的系统和方法

    公开(公告)号：US20140169188A1

    公开(公告)日：2014-06-19

    申请号：US13716534

    申请日：2012-12-17

    Applicant: Bernard Arambepola ,  Parveen Shukla ,  Thushara Hewavithana ,  Sahan Gamage

    Inventor： Bernard Arambepola ,  Parveen Shukla ,  Thushara Hewavithana ,  Sahan Gamage

    IPC: H04B7/04

    CPC classification number: H04L27/2614 ,  H04L5/0044

    Abstract: A system and method are provided for implementing a peak-to-average power ratio (PAPR) reduction scheme for Orthogonal Frequency-Division Multiple Access (OFDMA) modulation. A unique PAPR reduction scheme for OFDMA modulation for systems operated according to a DOCSIS standard achieves results similar to those attributable to tone reservation schemes in a manner that does not negatively affect an amount of available data capacity, particularly in implementations with limited numbers of subcarriers. The disclosed systems and methods are particularly adaptable to next generation cable gateways and/or next generation cable modems. These next generation cable gateways and/or cable modems may find particular utility in advanced hybrid fiber/coaxial cable systems. The adaptable cable gateways/modems may include a cable gateway system-on-chip (SOC) configuration. The disclosed schemes may be applicable to OFDM modulation. For OFDM, however, the known tone reservation algorithms also may be employed.

    Abstract translation: 提供了一种用于实现正交频分多址（OFDMA）调制的峰均功率比（PAPR）降低方案的系统和方法。 用于根据DOCSIS标准操作的系统的OFDMA调制的独特的PAPR降低方案实现了类似于对于音调预留方案的结果的结果，其结果不会不利地影响可用数据容量的数量，特别是在具有有限数目的子载波的实现中。 所公开的系统和方法特别适用于下一代电缆网关和/或下一代电缆调制解调器。 这些下一代电缆网关和/或电缆调制解调器可以在先进的混合光纤/同轴电缆系统中发现特定的用途。 可适应性的电缆网关/调制解调器可以包括电缆网关片上系统（SOC）配置。 所公开的方案可以适用于OFDM调制。 然而，对于OFDM，也可以采用已知的音调预留算法。

    Direct conversion television receiver
    7.
    发明申请
    Direct conversion television receiver 审中-公开
    直接转换电视接收机

    公开(公告)号：US20090268101A1

    公开(公告)日：2009-10-29

    申请号：US12150006

    申请日：2008-04-24

    Applicant: Parveen Shukla ,  Bernard Arambepola ,  Thushara Hewavithana ,  Nick Cowley

    Inventor： Parveen Shukla ,  Bernard Arambepola ,  Thushara Hewavithana ,  Nick Cowley

    IPC: H04N5/44 ,  H04B1/10

    CPC classification number: H04B1/30 ,  H03D3/009 ,  H04L27/3863 ,  H04N5/455 ,  H04N21/4382

    Abstract: A direct conversion television receiver may include a phase de-rotator which substantially undoes the phase rotation of a phase rotator. The phase de-rotator takes the low pass filtered signal and substantially removes the rotation caused by the phase rotator. As a result, it is easier to estimate the phase and gain imbalance and to make a correction for the phase and gain imbalance, via a feedback loop, without the effects of phase rotation.

    Abstract translation: 直接转换电视接收机可以包括基本上消除相位旋转器的相位旋转的相位去旋转器。 相位去旋转器采用低通滤波信号，并且基本上消除了由相位旋转器引起的旋转。 因此，更容易估计相位和增益不平衡，并通过反馈回路对相位和增益不平衡进行校正，而不会产生相位旋转的影响。

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