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    • 3. 发明授权
    • One bit digital quadrature vector modulator
    • 一位数字正交矢量调制器
    • US06339621B1
    • 2002-01-15
    • US09135243
    • 1998-08-17
    • Christian CojocaruTheodore VarelasMark CloutierLuc Lussier
    • Christian CojocaruTheodore VarelasMark CloutierLuc Lussier
    • H04B1406
    • H04L27/362H03F2200/331
    • A One Bit Digital Quadrature Vector Modulator (DQVM) and a method of generating single sideband output signals are useful for a wide range of radio frequency, signal processing and wireless applications. The DQVM simplifies the necessary digital multiplication by using noise shaped one bit versions of both the baseband IB and QB signals to be modulated and the ILO and QLO modulating signals. The one bit DQVM enables a much faster digital implementation of the digital quadrature vector modulation function than can be achieved with conventional multi-bit digital techniques. In addition the single sideband upconversion of the DQVM achieves high suppression of the unwanted sideband by applying an offset to one of the low speed input samples. Digital vector modulators are an improvement over conventional analog vector modulators as they are not subject to the amplitude and phase matching problems inherent in analog vector modulators.
    • 一个位数字正交矢量调制器(DQVM)和一种产生单边带输出信号的方法可用于广泛的射频,信号处理和无线应用。 DQVM通过使用要调制的基带IB和QB信号的噪声形状的一位版本以及ILO和QLO调制信号来简化必要的数字乘法。 与使用传统的多位数字技术相比,该位DQVM能够实现数字正交矢量调制功能的更快速的数字实现。 此外,DQVM的单边带向上转换通过对低速输入采样之一施加偏移来实现对不想要的边带的高抑制。 数字矢量调制器是对传统模拟矢量调制器的改进,因为它们不受模拟矢量调制器固有的幅度和相位匹配问题的影响。