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多模式ΣΔ调制器的设计及行为仿真

Behavioral Design and Simulation of Multi-mode Sigma Delta Modulator
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摘要 提出了一种适用于多模式零中频接收机的1位级联可重构ΣΔ调制器结构。该调制器采用双采样技术及前馈通道提高动态范围。推导了缩放系数以获取所需的噪声成形。分析了电路的非理想性,并利用Matlab/SIMULINK进行行为级建模得出电路子模块的指标。仿真得到的GSM/Bluetooth/GPS/WCDMA/WLAN/WiMAX的峰值信噪比分别为85/81/67/65/56/48dB,满足各通信标准要求,验证了该结构的有效性和电路的可行性。 A reconfigurable cascade sigma delta modulator with single-bit quantizers was presented for the multi-standard zero-IF receiver on the system level.Double-sampling technique and feed-forward path were adopted to increase the dynamic range.The coefficient scaling was deduced to obtain the desired noise shaping.The effects of circuit non-idealities on the modulator performance were analyzed and modeled in Matlab/SIMULINK to extract the required circuit specifications.The achieved peak SNR is 85/81/67/65/56/48dB for GSM/Bluetooth/GPS/WCDMA/WLAN/WiMAX respectively,which fulfills the requirements of communication standards and validates the efficiency of the proposed topology.
作者 李金凤 唐祯安 汪家奇
机构地区 大连理工大学电子系 沈阳化工学院信息工程学院
出处 《系统仿真学报》 CAS CSCD 北大核心 2009年第23期7671-7674,共4页 Journal of System Simulation
基金 国家863自然科学基金(90607003)
关键词 ΣΔ调制器 双采样 前馈通道 多模式接收机 仿真 sigma delta modulator double-sampling feed-forward path multi-standard receiver simulation
分类号 TP391 [自动化与计算机技术—计算机应用技术] TN432 [电子电信—微电子学与固体电子学]
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参考文献12

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系统仿真学报
2009年 第23期

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