Friday, November 30, 2007

Cross Layer optimization is going to be important

Cross Layer Optimization
link 1
link 2

This concept is going to be important from the perspective of developing a cognitive and adaptive WiMAX radio. The use of MIMO and other advanced antenna technologies are going to enhance the PHY layer significnatly. From a simulation perspective a cross layer approach is going to be required in order really show the true performance. the MAC layer side of the system needs to be incorporated with the advanced PHY layer.

There is research in the area of developing better simulations in order ot address the cross layer issues.

Definitely need to consider some of this with regards to cognitive WiMAX

Wednesday, November 14, 2007

ITU- United Nations approval of WiMAX

ITU approval

good mobile wimax article

Microwaves RF mag article

dedicated pilots / MIMO WiMAX beamforming

http://www.home.agilent.com/agilent/editorial.jspx?action=download&cc=US&lc=eng&ckey=1213544&nid=-536902344.536910932.00&id=1213544

WiMAX plug fest architecture/test plan

http://www.wimaxforum.org/technology/downloads/2nd_Mobile_WiMAX_PlugFest_White_Paper.pdf

Cisco buys into WMAX

http://www.unstrung.com/document.asp?doc_id=66951

Tuesday, November 13, 2007

knobs for cognitive radio

Radio paramters
transmitter power, frequency, bandwidth, modulation, and channel
coding

FroM Rieser PhD Thesis

0 Power
1 Carrier Frequency (Fc)
2 Bandwidth
3 Symbol Rate
4 Modulation
5 Forward Error Correction (FEC)
6 Payload/frame length
7 Automatic Repeat Request (ARQ)
8 Dynamic Range
9 Equalization
10 Encryption
11 Antenna Configuration
12 Voice
13 Noise Cancellation (limiting)
14 Interference Temperature
15 Time Division Duplex (TDD)