Here is a link to our thesis about an S-band, highly linear down-converter designed on a GaAs MMIC, written at SAAB Electronic Defense Systems in Mölndal, Göteborg.
Archive for the ‘Chalmers’ Category
Aug
05
2009
Sommaren snart slut…
Sommaren går nu mot sitt slut, precis som sommarjobbet. Om tre veckor flyger jag till Hong kong för att börja året utomlands genom Chalmers utbytesprogram. För någon dag sen fick jag mitt studentvisum och klartecken för boendet. Flygbiljetten är klar sedan maj. Spänningen stiger 
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Juli har visst varit den mest solfattiga julimånaden på 50 år i sverige så det ska bli skönt att landa i Hong Kong med 30-35 grader värme vanligtvis i slutet av augusti. Under vintern blir det som lägst +10 sägs det.
Med 9 miljoner invånare i Hong Kong lär det bli en smärre förändring mot Göteborg och det ska bli otroligt spännande!
May
26
2009
Bachelor Thesis: LiDAR-measurements on forests
Three dimensional forest
As my bachelor thesis, I finally chose the task of measuring individual trees from three dimensional images of a forest, generated by a helicopter equipped with a laser. The raw data was already generated for us so the work consisted mainly of image processing of this data.
The first and crucial part was, of course, to actually find the trees in the forest. The four of us split and implemented two such algorithms in parallell. I was part of implementing an advanced pattern recognition algorithm called Multiscale Isotropic Matched Filtering invented a few years earlier.
Both methods performed well but unfortunately the other algorithm, which was very simple and intuitive in contrast to ours, found more trees.
With the detected trees it was possible to compare our findings to data from ground measurements. With this knowledge it was possible to estimate the relationship between tree height and diameter for example and the tree biomass. The final goal was to get a good estimate of the total biomass in an area. The simple method overestimated the biomass with only 8% and was very accurate.
Anyway, it’s been a rather fun project and I find the area of image processing and pattern analysis very interesting.
Feb
03
2009
I was drafted for a year in Hong Kong!
In the end of november, I made a note that I was working on the application for the WorldWide student exchange programme. Yesterday people were getting excited during a break in the lecture. They had been drafted for the WorldWide student exchange programme. My own pulse started to race very fast when I tried to open the email containing the selected people. Luckily I didn’t have to read the whole mail since I heard my name being shouted from a nearby computer. I’m going to The Hong Kong University of Science and Technology or HKUST for short! Quoted from Wikipedia:
Since its official opening in 1991, the university has become one of the top universities in Hong Kong and is among the most prestigious in Asia. The Times Higher Education ranked HKUST 39th worldwide and 24th in technology.
There’s not much I know yet other than the fact that the exchange is spanning my forth year and will roughly cover 10 months. And that most people speak english since Hong Kong was a colony of England up until 1997.
Nov
24
2008
Winter and bachelor thesis
The winter has arrived. It’s been rather cold, with a few degrees below zero the last week or so. And today it finally snowed, even if it only was small flakes.
I have until the end of this week to compose my letter for the WorldWide student-exchange application. The competition is really tough but you gotta aim high…
It’s also time to choose a Bachelor’s thesis. It is a relatively large project that runs during the spring term and when it’s done, we recieve our Bachelors degree. In one of my electable courses, Incompressible flow, we were given a chance to do something extraordinary:
We will calculate these things with a cluster consisting of 1100 cpu’s