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
Material
for the Lab work pdf
format. (in English)
Prerequisites for this laboratory exercise
S-72.420 Siirtojärjestelmien
suunnittelumetodiikka (for Finnish
students)
S-72.244 Modulation and Coding
Methods
Also S-72.232, S-72.423, S-72.227, and some courses offered by the Radio
Laboratory (S-26) are useful.
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 03-02-2005/Kru