By Topic

Direct-digital RF-modulator: a multi-function architecture for a system-independent radio transmitter

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Petri Eloranta ; STMicroelectronics, Agrate Brianza ; Pauli Seppinen ; Aarno Parssinen

The number of different radio systems is currently increasing in portable devices like mobile phones due to the wider range of applications that require an optimized wireless communications channel to different services or other devices. To make this cost and power efficient, the transmitter must be adaptable to several different radio systems while keeping the complexity and cost reasonable. This article presents fundamental circuit techniques to enable low cost, low power, and low complexity transmitter architecture by combining digital-to-analog conversion, up-conversion, unwanted sideband rejection, power control, and part of the digital image rejection filtering into a single mixed-signal circuit block. The direct-digital RF-modulator architecture is the basis for a software-defined radio transmitter. It was demonstrated against WCDMA system requirements, but the versatility and the performance of this architecture enables support for other radio systems, such as GPRS and WLAN.

Published in:

IEEE Communications Magazine  (Volume:46 ,  Issue: 4 )