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6G wireless communication links operating at frequencies beyond 200 GHz : an analysis of their performance and main limitations / by Pedro Rodríguez Vázquez. Wuppertal, February 2021
Content
Abstract
Zusammenfassung
Context
Introduction
Current status of mobile communication networks
The high mm-Wave and THz bands
Technologies for high mm-Wave and THz communications
SoA of fully-electronic wireless communication links for frequencies beyond 200 GHz
Limitations of the SoA
Central Research Question and Contributions
Thesis Structure
Digital Communications
Introduction to Digital Communications
Bit Error Rate, Error Vector Magnitude, and Signal to Noise Ratio
EVM/BER relation
SNR/EVM relation
RF Front-ends for Wireless Communications
Tx and Amplifier-first Rx RF-front-end modules
Transmitter and Amplifier-first Receiver Architecture
×16 IQ LO generation path
Tx up-conversion path
Rx down-conversion path
On-Chip antenna and BB packaging scheme
RF Characterization
Single-tone RF measurements of the Tx and Rx
Tx and Rx back-to-back results
Wireless Communication Link
Set-up description
Measured Link results
EVM analysis
Conclusions
Mixer-First Receiver RF front-end
Introduction
Mixer-First Rx Architecture
Down-Conversion Stage Design and Simulated Results
RF characterization
Single-tone RF measurements of the Rx
Tx and Rx back-to-back results
Wireless Communication Link
Measured link results
EVM analysis
Tx and Rx operated with independent external drive
Conclusions
IQ-polarized Tx and Rx RF front-ends
Introduction
Tx and Rx Architecture
Operation principle
×8 Lo generation path
Tx up-conversion path
Rx down-conversion path
Linear Dual-Polarization antenna
Packaging
RF characterization
Single-tone RF measurements of the Tx and the Rx
Tx and Rx back-to-back results
Wireless Link Results
Measured link results
EVM analysis
Wireless link performance for different Tx/Rx azimuthal rotations
Conclusions
MIMO RF front-end
Introduction
DP Tx and Rx RF Front-end Architecture
Tx and Rx circuit building blocks
Packaging
Circular Dual-Polarization antenna
RF characterization
Single-tone RF measurements of the Tx and Rx
Tx and Rx back-to-back results
Wireless Communication link
EVM results and analysis
Conclusions
Conclusion and future outlook
Thesis Summary
Thesis Summary
Future Directions
Bibliography