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    • 8. 发明授权
    • Robust differential receiver for frequency modulated system
    • 用于调频系统的鲁棒差分接收机
    • US08644426B1
    • 2014-02-04
    • US12498755
    • 2009-07-07
    • Quan ZhouSongping WuHui-Ling Lou
    • Quan ZhouSongping WuHui-Ling Lou
    • H03D3/22H04L27/22
    • H04B1/1027H03D3/22H04L27/0014H04L27/156H04L27/16
    • A robust differential receiver is described that may be used in any frequency modulated system, including short-range radio frequency (RF) communication devices. The differential receiver provides a preamble detection approach that reduces false preamble detection, a fine carrier frequency (CFO) estimation approach that provides an extended estimation range, and robust in-band and out-of-band interference detection. The described differential receiver assures that preamble detections are not falsely triggered, and that CFO estimates are based on accurately modeled preamble waveforms that have not been distorted by phase ambiguities or in-band distortion. In this manner, the described robust differential receiver assures that CFO estimates used to compensate remaining portions of detected signals are accurate, thereby reducing the likelihood that remaining portions of the detected signal will be affected by phase ambiguity distortions, thereby enhancing the differential receiver's ability to lock onto an otherwise unavailable communication channel, and/or reducing transmission errors and/or packet loss.
    • 描述了可用于包括短距离射频(RF)通信设备在内的任何调频系统中的鲁棒差分接收机。 差分接收机提供减少伪前导码检测的前导码检测方法,提供扩展估计范围的精细载波频率(CFO)估计方法以及鲁棒带内和带外干扰检测。 所描述的差分接收器确保前导码检测不被错误触发,并且CFO估计基于没有被相位模糊或带内失真扭曲的精确建模的前导码波形。 以这种方式,所描述的鲁棒差分接收机确保用于补偿检测到的信号的剩余部分的CFO估计是准确的,从而降低检测信号的剩余部分将受相位模糊度失真影响的可能性,从而增强差分接收机的能力 锁定到否则不可用的通信信道,和/或减少传输错误和/或分组丢失。