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针对QPSK调制的WCDMA扩频信号提出了一种新的数摸混合型解扩方法。实验表明这种数模混合型解扩方法可以实现QPSK调制的WCDMA扩频信号的解扩功能。与全数字解扩方法相比,该方法无需A/D转换器和正交变换器,具有电路结构简单的特点,而且由于直接在模拟域计算,因此具有模拟运算电路功耗低、高速等优点,同时由于模拟电路受数字电路控制,该方法又具有数字电路灵活,稳定等优点。
A new digital-touch hybrid despreading method is proposed for WCDMA spread spectrum signals modulated by QPSK. Experiments show that this hybrid digital-to-despread method can realize the despreading function of QPSK modulated WCDMA spread spectrum signal. Compared with the all-digital despreading method, the proposed method does not need A / D converters and orthogonal converters, and has the advantages of simple circuit structure and advantages of low power consumption and high speed of the analog operation circuit because it is directly calculated in the analog domain At the same time, because the analog circuit is controlled by the digital circuit, the method has the advantages of flexible and stable digital circuit.