A Low-Power Multi-Rate Cascade Sigma Delta Modulator Suitable for Multi-Mode Wireless Communication Applications

摘要：

A novel low-power multi-rate sigma delta modulator is proposed,which is capable to support a wide range of wireless communication standards.The modulator is based on the 2-2 cascade single-bit architecture for good stability and linearity.The multi-rate technique is adopted to decrease the sampling frequency of the 1 stage integrators of the sigma delta modulator to reduce the power dissipation.A feedforward signal path is added to suppress the harmonic distortions and attain high linearity over a wide bandwidth.The effects of circuit nonidealities on the modulator performances are analyzed to extract the parameters of the basic blocks and verify the feasibility of the proposed architecture.A peak SNR of 85/81/65/63/54/48 dB is achieved for GSM/Bluetooth/GPS/WCDMA/WLAN/WiMAX mode.The simulation results demonstrate the efficiency and feasibility of the proposed modulator and indicate that the modulator is very suitable for the multi-mode wireless communication applications.

关键词： sigma delta modulator multi-rate multi-standard wireless receivers low power electronics feedforward path

作者: Li Jinfeng Cao Shun Wang Ying

作者单位: College of information engineering Shenyang university of chemical technology Shenyang,China

会议类型: 国际会议

会议名称: 2011 International Conference on Computer and Network Engineering(ICCNE 2011)(2011年计算机与网络工程国际会议)

会议地点: 郑州

会议语种:英文

页码: 124-128

在线出版日期: 2011-06-17（万方平台首次上网日期，不代表论文的发表时间）