Diary of Monday, 14th February 2005
Prepared by: Mehboob Khatani and Saira Saleem
14 Feburay, day for those, who love and share love... well weather of Trieste also support 14 February and sunshine make Adriatico Sea more beautiful.
Day starts with the lecture of Prof. E.Pietrosemoli on Digital Modulation: Current Wireless Techniques. Well I must say that the lecture was the most comprehensive and well explain by Prof. E .Pietrosemoli. He explained the personal communication system in detail with some good example about the 3rd and 4th generation of personal cellular communication system. He also told us about the short range : wireless PAN (blue tooth), medium range : Wireless LAN, WiFi, in which everyone took interest and ask questions related to the implementation of WiFi and about long rage WiMax . At 10:00 pm we have a coffee break every one took coffee and tea with cookies.
After break we joined again Prof. E .Pietrosemoli lecture in which he explained the multiple access technique with a very good example of cocktail party e.g. the aim is for all the guests to hold an intelligible conversation. In this case the resource available is the house itself.
- FDMA: each guest has a separate room to talk to their partner.
- TDMA: everyone is in the same room, and has a limited time to hold their conversation (so they must talk very quickly).
- FH-CDMA: the guests run from room to room to talk.
- DS-CDMA: everyone is in the same room, talking at the same time, but each pair talks in a different language.
Then he explain about the wireless technology, in last he ended with some questions:
- Q: What's the difference between WiFi modes — is 802.11a better than 802.11b?
- A: 802.11a uses OFDM and therefore can achieve a higher data rate
- Q: Bluetooth is cheap, why can't I use it for everything?
- A: Bluetooth is good for short-range, cable replacement. Data rate, range, and services might be limited
- Q: Why is my wireless link giving me poor performance? Can I just increase the transmit power to improve things?
- A: It could be noise, interference or the effects of the wireless channel. Increasing transmit power may not solve the problem, e.g. diversity might be appropriate to combat the wireless channel
- Q: What can we expect from the future of wireless communications? Will it provide ubiquitous, pervasive connectivity?
- A: Multiple-Input Multiple-Output techniques, Ultrawideband, Multicarrier CDMA, ad hoc mesh networks, and...?
At 12:30 we have lunch time, we enjoy lunch with typical Italian and Indian dishes. Well at 2:00 we entered in the world of Practical I mean to say LAB. The lab session was consisted of two sessions. In first session Mr.S.Buettric gives us a brief lecture on Wi-Fi Hardware. After Mr.S.Buettric, Prof. Dr. R. Struzak introduce one very famous writer name Mr.Rob.Flickenger form United States. Mr.Rob.Flickenger explains the Wi-Fi Hardware Installation and shows the configuration with installation.
Then at 4:00 we have a short break , we enjoyed drinks and biscuits, once again we joined Mr.Rob.Flickenger to continue our lab. It was interesting and provides us an insight look on wireless network setup. At the end of lab we are able to configure the device and able to make one client with our wireless adapter.
At 7:00 we finish the most romantic and off course busy day along the gift of knowledge. We took dinner at 8:30...... and now with my colleague I'm writing this dairy of 14 February. Good Luck to all...