A bit of different personal speed record today: When I was recently on a high speed train between Cologne and Paris, I was surprised when a speed test gave me well over 100 Mbit/s in the downlink direction when the train raced through the French countryside at almost 300 km/h.
Time flies and I am always astounded that I’ve been writing this blog since 2005. Over the years, quite a number of posts have accumulated. As my current WordPress profile bundles them in pages of 10 posts, I’m now on page 255 and thus close to an 8-bit overflow. If you don’t get it, you are probably too young and never lived through the 8-bit home computer era ^^
After my post on the stellar data rates that can theoretically be achieved by combining 60 MHz of bandwidth of 4G LTE with 100 MHz 5G NR in the 3.5 GHz range, I think it is also necessary to look at real life and have a look at how much capacity is actually offered by a live network cell when it is fully loaded.
In the previous two posts on 5G NR massive MIMO, a.k.a. beam forming, I’ve gone into the basic principles of what it can be used for in practice and how antennas for beam forming will look like. Great background information from Keysight and Ericsson respectively. The next question I then had was how mobile device and the network communicate with each other to adapt downlink transmission in mobility situations.
It’s been a while since I had a list of recommendations of other interesting wireless related sites on the net. This time around my picks are not standard websites or even blogs but Twitter and Youtube accounts. This means that their focus is on images and videos, perfect to get an idea of how equipment looks like and how it is used in practice!
A bit off the beaten path, I’ve been to Helmond this week, a city in the Netherlands not far from Eindhoven for a very particular purpose: To visit the Home Computer museum there that opened last year. Run by volunteers, I can’t quite remember anymore how I stumbled across them on the web, perhaps it was their short videos about how they found some space at the border of the city center and how it was converted for putting their collection on display. Based to the size and significance of Helmond I was expecting a small museum with a few exhibits which is why I was quite surprised when I saw its real dimensions.
Not long now and we will celebrate the 50th anniversary of the first human landing on the moon! 50 years ago, on the 20th July 1969, humankind’s greatest tech adventure culminated with Neil Armstrong setting foot on the lunar surface. Altough I wasn’t born back then, this has inspired me from early childhood and over the years my fascination grew even more. Even after several trips to the Manned Space Flight center in Huston and Kennedy Space Center in Florida, I still get goosebumps when I pick up a book about a particular aspect of the Apollo program. So in anticipation of the 50th anniversary celebrations, here are the top three books I think one should have read about Project Apollo: Continue reading 50th Anniversary of Apollo 11 – My Book Recommendations
When you accidentally drop your phone and it looks like on the picture on the left when you pick it up, your plans for the rest of the day are pretty much out the window. There are several options after such an accident one of them is to just get another device and start from scratch. This is what I did and spent the next 3 hours installing LineageOS and all apps and data from scratch again. Once done I thought I’d make the best out of the broken phone, which was still working, and see if I could have been faster (next time…) by just cloning the complete Android installation from one device to the other. This works great on the PC with Linux and I regularly do this to make sure I have a backup SSD with a working clone of my installation. After several hours and approaching the issue from several angles, I have to say that I came up empty handed.
When I finished the second book of the Bobiverse trilogy by Dennis E. Taylor, I immediately jumped into ‘All These Worlds‘, the third and (so far) final part of this brilliant science fiction series. Short summary of what happened so far without too many spoilers: Geek brain gets frozen today, wakes up as replicant a hundred years later, explores the Galaxy and tries to save mankind with the help of his clones. The second book ended with the clear indication that in the third part, Bob and his ‘descendant’ clones would have to deal with ‘the Others’ and that a peaceful solution was probably not in the cards.
Thanks to a public holiday in Germany, I just had a 4 day weekend and spent most of it at GPN19 in Karlsruhe learning new things, meeting people and giving back to the community by holding talks as well. I really like that we have lots of community organized hacking events all year around and this one is a particular fun one. It is not as big as the yearly ‘Congress’ in December but still has a lot of diverse topics to get inspired and 1800 people attending.
One of the talks I gave was a technology introduction to 5G (in German). Probably too high level for most of you visiting this site regularly but being even more overhyped than 4G a decade ago, I thought it was time to talk about technology and reality rather than myths and marketing fluff. A big thank you to the great C3 Video team, it took them less than 2 hours to publish it!