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    • 8. 发明申请
    • APPARATUS AND METHODS FOR SAMPLING RATE CONVERSION FOR WIRELESS TRANSCEIVERS
    • 用于无线收发器采样速率转换的装置和方法
    • WO2011106651A2
    • 2011-09-01
    • PCT/US2011/026254
    • 2011-02-25
    • QUALCOMM IncorporatedJI, ZhuBANISTER, Brian ClarkeKANG, Inyup
    • JI, ZhuBANISTER, Brian ClarkeKANG, Inyup
    • H03H17/06
    • H03H17/0294H03H17/0642
    • Disclosed are methods and apparatus for sampling rate conversion in a wireless transceiver. The methods and apparatus achieve agile setting of sampling rates or resampling by adaptively setting a sampling rate of a signal based on at least one performance requirement of the transceiver. In particular, the methods and apparatus perform sampling of an input signal at a first sampling rate to gain one or more input signal samples. The input signal samples are then filtered using parallel or polyphase filtering operating at a second sampling rate lower than the first sampling rate. The filtered samples are then interpolated at the second sampling rate to achieve resampling of the input signal. Polyphase filtering affords an effectively high input sampling rate for good spectrum image rejection, while allowing the second sampling rate to be effectively much lower than the first rate, thereby reducing the complexity of multiplier operations for interpolation.
    • 公开了用于在无线收发机中采样率转换的方法和装置。 方法和装置通过基于收发器的至少一个性能要求自适应地设置信号的采样速率来实现对采样率或重采样的敏捷设置。 特别地,方法和装置以第一采样率对输入信号进行采样,以获得一个或多个输入信号样本。 然后使用低于第一采样率的第二采样率的并行或多相滤波来过滤输入信号样本。 然后以第二采样率对经滤波的采样进行内插,以实现对输入信号的重新采样。 多相滤波提供有效的高输入采样率,以获得良好的频谱图像抑制,同时允许第二采样率有效地远低于第一速率,从而降低了插值的乘法器运算的复杂度。