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Mobile WiMAX Handset Front-End: Design Aspects and Challenges [chapter]

Vaclav Valenta, Genevieve Baudoin, Antoine Diet, Roman Marsalek, Fabien Robert, Martha Suarez, Martine Villegas
2009 WIMAX New Developments  
For a WiMAX signal, such a technique requires in the range of a hundred MHz bandwidth on the phase and amplitude baseband paths (as for LINC technique and any other nonlinear decomposition method).  ...  A WiMAX transmitter architecture must meet design constraints of: providing high efficiency and linearity for a wideband OFDM (the bandwidth can be up to 100 MHz) and high Peak to Average Power Ratio (  ... 
doi:10.5772/8263 fatcat:3gm7z5trd5f37igxaptnnxym6e

An octave-range watt-level fully integrated CMOS switching power mixer array for linearization and back-off efficiency improvement

Shouhei Kousai, A. Hajimiri
2009 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers  
The power mixer array is presented as a novel power generation approach for non-constant envelope signals.  ...  It achieves a PAE of 25%, at an average output power of +26 4 dBm, and an EVM of 4.6% with a non-constant-envelope 16 QAM signal.  ...  Wang for many helpful discussions, Hamdi Mani of Caltech, and Toshiba Corporation.  ... 
doi:10.1109/isscc.2009.4977465 dblp:conf/isscc/KousaiH09 fatcat:tbmlpopgyfhszg3v4ccdggpz54

CMOS analog design for wireless communication

V. Liberali, G. Trucco
2004 24th International Conference on Microelectronics (IEEE Cat. No.04TH8716)  
Low cost and high flexibility will be required for future generations of portable terminals; for these reasons, the market share of CMOS technology is expected to grow quickly.  ...  Open-loop techniques are: Envelope Elimination and Restoration (EER) and Linear Amplification with Non-linear Components (LINC). feedback: This technique, illustrated in LPF LPF PA LO Quadrature  ...  Fig. 6 . 6 Architecture of a homodyne (or direct conversion) radio transmitter. Fig. 8 .Fig. 9 . 89 PA with envelope elimination and restoration (EER). Linear PA made of nonlinear stages (LINC).  ... 
doi:10.1109/icmel.2004.1314882 fatcat:rkck24qvunfbjpwzmdfeq3l7wy

Multi-Band Outphasing Power Amplifier Design for Mobile and Base Stations

Omid Talebi Amiri
2014
Conclusion A new approach for linear amplification with nonlinear components (Z-LINC) that provides a zero capacitive loading to the PAs over the whole power back-off range has been presented.  ...  For instance, Fig. 2-8 shows that in an ideal Class-E PA, the power ( Fig. 2-9) decomposed to two phasors with constant envelope using signal component separator (SCS) shown inFig. 2-9.  ... 
doi:10.5075/epfl-thesis-6410 fatcat:6dvxjjc6gbgd3azdfoipijzswq

Aalborg Universitet CMOS Power Amplifiers for Multi-Hop Communication Systems Aniktar, Hüseyin CMOS Power Amplifiers for Multi-Hop Communication Systems

Hüseyin Aniktar, Phd Thesis
2007 unpublished
It has a measured 1-dB compression point between 1920 MHz and 1980 MHz of 21.3 ± 0.5 dBm with a maximum PAE of 24%.  ...  WCDMA in the 900 MHz band is a cost effective way to deliver a high-speed wireless coverage. This work demonstrates a 850/900/1800/1900 MHz quad-band WCDMA power amplifier.  ...  Mikkelsen for their great contribution to my PhD research. The authors would like to thank Peter Boie Jensen for lab assistance.  ... 
fatcat:hxsu25vbzjclvnra3vyaohruki

CMOS Power Amplifiers for Wireless Communication Systems CMOS Power Amplifiers for Wireless Communication Systems Copyright c Daniel Sira CMOS Power Amplifiers for Wireless Communication Systems Assessment committee

Daniel Sira, Henrik Sjöland, Timo Rahkonen, Søren Jensen, Denmark Supervisor, Torben Larsen, Techn, Jens Lindof, Pia Thomsen
2010 unpublished
Nowadays the polar transmitter topology, where the amplitude and phase modulated signals are processed in two separate paths, is one of the major techniques that enables to employ a switch-mode PA in the  ...  RF transmitters with varying amplitude signals.  ...  Kroyer, Aalborg University, for technical support, and P. Madsen and J. C. Lindof, Texas Instruments, for helpful discussions.  ... 
fatcat:p7kzvkvdejenfdea2nb7ypbbye

Digital Deep-Submicron CMOS Frequency Synthesis for RF Wireless Appllications [article]

Robert Bogdan Staszewski
2002 unpublished
For more information, please see the item record link above.  ...  Another saturation-mode PA method could be used: Linear Amplification with Nonlinear Components (LINC) adds two constant-envelope PA outputs of the properly phase shifted signals.  ...  In this case, the 1/f 2 component contains large energy at lower frequencies which cannot be separated through a linear filtering.  ... 
doi:10.13140/rg.2.1.1975.4326 fatcat:3rrnnvkihnh3hmuv7u4aurjrnm

Application of adaptive multilevel substructuring technique to model CMOS micromachined thermistor gas sensor, part (I): A feasibility study

K. Sadek, W. Moussa
Proceedings International Conference on MEMS, NANO and Smart Systems  
45/46/34% PAE Linear Polar Transmitter for EDGE/ WCDMA/Mobile-WiMax J.  ...  Our society promotes the advancement of microwave theory and its applications, at frequencies from 200 MHz to 1 THz and beyond.  ...  A number of approaches for improving the linear performance of the PA when deployed in a transmitter system will be described, including analog linearization methods such as feedforward, feedback and harmonic  ... 
doi:10.1109/icmens.2003.1222009 dblp:conf/icmens/SadekM03 fatcat:ovvm4vv6vbgalks7ad26xjo3yq