Baseband Model for Uniformly Sampled RF-PWM

被引：5

作者：

Chierchie, Fernando ^{[1
]}

Gonzalez, Gustavo J. ^{[1
]}

Morales, Juan I. ^{[1
]}

Paolini, Eduardo E. ^{[1
,2
]}

Cousseau, Juan ^{[1
]}

Mandolesi, Pablo Sergio ^{[1
,2
]}

机构：

[1] Univ Nacl Sur UNS, Inst Invest Ingn Elect IIIE, Alfredo Desages UNS CONICET, Dept Ingn Elect & Comp, RA-8000 Bahia Blanca, Buenos Aires, Argentina

[2] Comis Invest Cient Prov Buenos Aires CICpBA, RA-1900 La Plata, Buenos Aires, Argentina

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2020年 / 67卷 / 08期

关键词：

Pulse width modulation; Baseband; Frequency modulation; Distortion; Radio frequency; Phase modulation; RF-PWM; baseband model; distortion; uniform sampling; symmetric PWM; digital transmitter; PULSE-WIDTH MODULATION; DIGITAL PWM; TRANSMITTER;

D O I：

10.1109/TCSI.2020.2978402

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A baseband model for a polar RF modulator based on uniform sampling (US) pulse width modulation (PWM) is presented. RF-PWM allows to encode a complex baseband signal (amplitude and phase) into the pulse width and pulse position of a binary signal towards an efficient and fully digital RF transmitter implementation. We extend the well-known derivation of the naturally sampled (NS) RF-PWM to obtain a detailed model of the US RF-PWM which includes the intrinsic inband and side-bands distortion. In RF-PWM the carrier frequency is equal to the PWM frequency (first PWM harmonic). We develop the model such that the first or any other higher harmonic of the PWM can be used as the carrier signal. The distortion signal is analyzed in detail and a discrete-time implementation of the model which relates to previous approaches is presented. This model is key to the analysis, characterization and simulation of a fully digital transmitter.

引用

页码：2816 / 2824

页数：9

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