ΣΔ modulator for digital wireless architecture: A review

Author

Sirmayanti, Sirmayanti ; Faulkner, Mike

Author_Institution

Telecommun. Study Program, State Polytech. of Ujung Pandang, Makassar, Indonesia

fYear

2014

Firstpage

83

Lastpage

87

Abstract

This paper studies Sigma-Delta (ΣΔ) technique to embed a complex modulation scheme such as orthogonal frequency division multiplexing (OFDM) into a single `on´-`off´ bit stream operating at the carrier frequency. The amplitude of the signal is related to the pulse widths and the phase to the pulse position. This paper concentrates on all digital up-converter structures of ΣΔ modulator architecture. The binary nature of their output removes the need for analog components in the up-conversion chain. Their outputs can be used directly to drive the switch mode power amplifier (SMPA) for high efficiency operation.

Keywords

OFDM modulation; digital radio; sigma-delta modulation; OFDM; carrier frequency; complex modulation; digital wireless architecture; high efficiency operation; orthogonal frequency division multiplexing; sigma-delta modulator; single on-off bit stream; switch mode power amplifier; up-conversion chain; Band-pass filters; Clocks; Encoding; Frequency modulation; Radio frequency; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering and Informatics (MICEEI), 2014 Makassar International Conference on

Print_ISBN

978-1-4799-6725-4

Type

conf

DOI

10.1109/MICEEI.2014.7067316

Filename

7067316