题目/Title：A Delta-Sigma-Based Transmitter Utilizing FIR Embedded Digital Power Amplifiers

作者/Author：刘恒,姜汉钧,沈弈禹,李宇根,王志华
                        Heng Liu,Hanjun Jiang,Yiyu Shen,Woogeun Rhee,Zhihua Wang

会议/Conference：MWSCAS 2015

地点/Location：Fort Collins, United States

年份/Issue Date：2015.2-5 Aug.

页码/pages：

摘要/Abstract：
This paper presents a new delta-sigma-based transmitter architecture with quantization noise reduction and coding efficiency enhancement for multi-mode wireless sensor network (WSN) applications. The proposed architecture utilizes a finite impulse response (FIR) filter embedded digital power amplifier (DPA) controlled by the output of a 1-bit second order low pass delta-sigma modulator (LPDSM) for both in-phase (I) path and quadrature (Q) path. Thanks to the interleaving operation of the FIR filter, the out-of-band noise is reduced hence coding efficiency is improved according to the behavior model simulation results. Since the switching of power amplifier (PA) is smoothed by FIR, distortion from the PA is also suppressed.