search query: @keyword LTE-A / total: 6
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Author: | Roverato, Enrico |
Title: | System-level design of all-digital LTE / LTE-A transmitter hardware |
Publication type: | Master's thesis |
Publication year: | 2012 |
Pages: | x + 84 s. + liitt. 10 Language: eng |
Department/School: | Mikro- ja nanotekniikan laitos |
Main subject: | Piiritekniikka (S-87) |
Supervisor: | Ryynänen, Jussi |
Instructor: | Kosunen, Marko |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
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Location: | P1 Ark Aalto 1347 | Archive |
Keywords: | CMOS direct-digital RF-modulator DDRM radio frequency digital-to-analog converter RF-DAC LTE LTE-A timing error noise floor |
Abstract (eng): | This thesis presents a detailed system-level analysis of an all-digital transmitter hardware based on the Direct-Digital RF-Modulator (DDRM). The purpose of the presented analysis is to evaluate whether this particular transmitter architecture is suitable to be used in LTE / LTE-A mobile phones. The DDRM architecture is based on the Radio Frequency Digital-to-Analog Converter (RF-DAC), whose system-level characteristics are investigated in this work through mathematical analysis and MATLAB simulations. In particular, a new analytical model for the timing error in the distributed up conversion is developed and verified. Moreover, this thesis reviews the LTE and LTE-A standards, and describes how a baseband environment for signal generation/ demodulation can be implemented in MATLAB. The presented system enables much more flexibility with respect to current commercial software's like Agilent Signal Studio. Simulation results show that the most challenging specification to meet is the out-of-band noise floor, because of the stringent linearity and timing requirements posed on the RF-DAC. This suggests that new means of reducing the out-of-band noise in all-digital transmitters should be researched, in order not to make their design more complicated than for their analog counterpart. |
ED: | 2013-01-15 |
INSSI record number: 45816
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