Introduction
In this laboratory exercise
different aspects of GSM transceiver technology are explored. Modulation
errors, receiver sensitivity, power ramp, and modulation spectrum, among
others, are measured. After the laboratory exercise the student should have a
clear picture of GSM transceiver operation.
Material
Background material for the Lab work.
Preliminary exercises for the Lab work.
Instruction for the Lab
measurements.
Prerequisites
for this laboratory exercise
S-72.1140 Transmission Methods in
Telecommunication Systems
S-72.2205 Digital Transmission
Methods
Links, downloadables, etc related to the laboratory exercise
Below are links to some
excellent introductory articles. If downloading fails, you can loan a copy from
the assistant.
Spectrum
analyzer basics If you are unfamiliar with spectrum analyzers, read
this introduction. It's a killer!
Testing
and Troubleshooting Digital RF Communications Transmitter Designs
This excellent document explains many basic things about modulation errors,
etc.
Digital
Modulation in Communication Systems -- An Introduction
Simply the most lucid introduction to digital modulation I have found. Highly
recommended.
Agilent
home page More excellent tutorials and application notes can be
found here.
The following measuring
equipment are used in this LabEx.
Below you can download some documents in pdf format.
At the minimum, you should be aware of the measurement accuracy of the devices..
Rohde&Schwarz
CTS55 Digital Radio Tester This is the device referred as
"the GSM tester" in the lab material. Here is an introduction and
data sheet.
Rohde&Schwarz FSEA30 Spectrum Analyzer
This is used in the laboratory exercise. Here is a brief introduction and data
sheet.
Rohde&Schwarz FSE-B7 Vector Signal Analyzer
This is an optional feature installed in the FSEA30 spectrum analyzer. Here is
the data sheet for FSE-B7.
Rohde&Schwarz
home page If you need more information...
Other useful stuff:
GMSK
in a nutshell About GMSK modulation.
ETSI homepage Specifications can
be downloaded here. GSM 05.05 is the most useful one in this laboratory
exercise.
Updated 12-10-2009/Kru