a brief introduction to the concept and application of smart antennas for Code Division Multiple Access (CDMA) systems is presented. Following some introductory remarks in Section 1.1, the basic definition and classification of smart antennas is

This thesis presents simulation data on array operation in wideband communication systems. It is shown that array structures with closer inter-element spacing outperform structures with much larger inter-element spacing. It is also shown that cir

关于中频数字化扩频接收机自适应抗干扰技术的研究的文章，希望能对大家有帮助。-IF digital spread spectrum receiver on adaptive interference rejection of the article, hope it' ll help.

在许多测试场合，传感器输出的信号往往很微弱，而且伴随有很大的共模电压（包括干扰电压），一般对这种信号需要采用测量放大器。测量放大器是一种高增益、直流耦合放大器，它具有差分输入、单端输出、高输入阻抗和高共模抑制比等特点。请设计一个测量放大器： 指标要求： a.当输入信号峰峰值uip-p=1mV时，输出电压信号峰峰值uop-p=1V。 b.输入阻抗：Ri>1MΩ c. 频带宽度： Δf（-3dB）=1Hz~1kHz d.共模抑制比： CMRR > 70dB -In