Archive for the ‘Wireless’ Category

3G and 4G Wireless Blog: OFDM and OFDMA: The Difference

In: My notes| Wireless

4 Dec 2009

A very good article about OFDM and OFDMA :
3G and 4G Wireless Blog: OFDM and OFDMA: The Difference.
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Smart posters and NFC

In: My notes| NFC| Our works

3 Nov 2009

Years ago we could listen to part of the concert from its poster in Sci-Fi Movies, and now it is really possible. Smart posters are equipped with a tag to provide a wide range of information such as audio, video, phone number, contact information, map or simply text.
Suppose you find a smart poster advertising a [...]

Z-Wave and Zensys

In: Wireless

25 Oct 2009

I found out that there is something called Z-Wave from Zensys, which claims is much better than ZigBee due to its operating frequencies which are at 900 and 800 bands, hence it is isolated from WiFi band (no more potential disturbance.)
According to Zensys:
Z-Wave technology dramatically extends the possibilities of today’s home security systems.  Z-Wave lets [...]

NS2 ,ZigBee and WPAN « Udin Harun

In: ZigBee| ns2

25 Oct 2009

After lots of googling I got this useful blog with lots of must-to-have links for NS2, ZigBee and most of the tools to do the simulation.
We are going to have a course project for network simulation on WPAN and ZigBee and these rare resources are very handy to start with.
NS2 for IEEE 802.15.4/ZigBee LR-WPANs :

Simulation [...]

E-payment and m-Wallet

In: My notes| NFC

24 Oct 2009

 
E-payment or e-wallet which is actually implemented as m-wallet is the biggest shot of NFC. Use of m-wallet in e-ticketing is replacing the current payment method such as mobile (SMS, web based) payment or using traditional plastic card. New generations of contactless Mastercard (paypass) or Visa (paywave) cards are available in market for customers. Currently [...]

NFC domino?

In: NFC

13 Oct 2009

 

Nearness from timo on Vimeo.
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Near Field Communication, What is NFC?

In: NFC| Our works

13 Oct 2009

Near field communication is a short range (<20cm) wireless communication system designed for mobile phones or other mobile devices supporting up to 424kbps of data rate.
It uses the same proximity technology of RFID working in 13.5MHz. Although standardization of NFC is still in progress, many applications are proposed to use it, mostly focused on [...]

Nearfield.org : A research project on NFC

In: NFC| Usefuls

13 Oct 2009

About
Touch is a research project that investigates Near Field Communication (NFC), a technology that enables connections between mobile phones and physical things. We are developing applications and services that enable people to interact with everyday objects and situations through their mobile devices. More…
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NFC Field : how it looks like in real world

In: NFC

13 Oct 2009

This video is about exploring the spatial qualities of RFID, visualised through an RFID probe, long exposure photography and animation. It features Timo Arnall of the Touch project and Jack Schulze of BERG.I
–Immaterials: the ghost in the field

Immaterials: the ghost in the field from timo on Vimeo.

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IEEE 802.11 Medium Access Control

In: IEEE 802.11| My notes

12 Oct 2009

“CSMA/CA attempts to avoid collisions by using explicit packet acknowledgment (ACK), which means an ACK packet is sent by the receiving station to confirm that the data packet arrived intact.”
- Wireless communication and and network by Vijay Garg
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