【摘要】 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。更多还原

【Abstract】 In this paper,a new mixed analog-digital algorithm for dispreading of QPSK modulated WCDMA signals is proposed.The experiments show that this algorithm could realize the dispreading of QPSK modulated WCDMA signals.As compared with the purely digital matched filter,the proposed algorithm needs no analog-to-digital converter and quartered demodulator,and its circuit is simple.Additionally,this algorithm shows its advantages of lower power consumption and high speed in operational circuit.This algorithm,for the analog circuit is controlled by the digital circuit,so has the digital-circuit advantages of flexibility and reliability.更多还原