Phase wrapping digital polar transmitter for multi-band OFDM ultra-wideband system

Author

Loke, W.-F. ; Chia, M.Y.-W. ; Chee, P.-Y.

Author_Institution

Inst. for Infocomm Res., A*STAR, Singapore, Singapore

fYear

2009

fDate

7-12 June 2009

Firstpage

401

Lastpage

404

Abstract

A digital polar transmitter for MB-OFDM ultra-wideband using a new architecture based on phase wrapping for digital phase modulator (DPM) is proposed. It exploits open-loop and multiplexed, multi-phase clocks (OMMC) for phase-modulating and a digital power amplifier (DPA) for amplitude-modulating wideband RF signal. We have studied its performance and provided the results for critical design parameters related to the polar resolutions for DPM and DPA operating up to 480 Mbps MB-OFDM Ultra-Wideband channels. In addition, the delay mismatch between the phase and amplitude paths in this digital polar transmitter has been evaluated.

Keywords

OFDM modulation; phase modulation; power amplifiers; radio transmitters; ultra wideband communication; wireless channels; digital phase modulator; digital power amplifier; multiband OFDM ultrawideband system; open-loop-multiplexed-multiphase clocks; orthogonal frequency division multiplexing; phase wrapping digital polar transmitter; Broadband amplifiers; Clocks; OFDM; Phase modulation; Power amplifiers; Radiofrequency amplifiers; Signal resolution; Transmitters; Ultra wideband technology; Wrapping; OFDM; UWB; communications; polar modulator; power amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5165718

Filename

5165718