Channel Tracking in Wireless OFDM Systems full report
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
seminar topics
Active In SP
**

Posts: 559
Joined: Mar 2010
#1
31-03-2010, 12:25 PM


Abstract”
In the presented paper, the principle of frequency domain channel estimation for wireless OFDM systems will be shown. A well known noise reduction technique will be adapted to HIPERLAN/2 and IEEE802.11a standards, and its positive effects will be demonstrated by simulation results. Channel tracking has not been considered by the WLAN standards named above, although it is well known that time-variant indoor radio channels can change their characteristics within one PHY burst. This paper presents some techniques for decision directed channel tracking, applicable in wireless OFDM systems


Presented By:
Heiko Schmidt, Volker K¨uhn, and Karl-Dirk Kammeyer
University of Bremen, FB-1,
P.O. Box 33 04 40, D-28334 Bremen, Germany,

And

Reinhard R¨uckriem and Stefan Fechtel
Infineon Technologies AG,
P.O. Box 80 09 49, D-81609 Munich, Germany

I. INTRODUCTION
The American IEEE802.11a standard and the European equivalent HIPERLAN/2 are two similar concepts for broad- band wireless LANs (WLAN) in the 5 GHz band. Both standards are based on the multicarrier modulation tech- nique OFDM (orthogonal frequency division multiplexing) combined with convolutional channel coding. The base- band modulation schemes of both standards are very similar, which simplifies implementation considerably. Challanges and difficulties considered in this paper regard both systems. Except for slight differences in signal mapping, most dis- crepancies between the standards regard the higher protocol layers. Section II presents some fundamentals of OFDM and the WLAN standards. Here we focus on the baseband modu- lation in the PHY layer and explain parts of the PHY burst structure relevant to channel estimation. Section III describes a frequency domain channel estima- tor. Assuming channel impulse responses being limited in time, correlations between adjacent subcarriers can reduce the noise influence on the estimated transfer function. Here, a new method for computing the correlations is shown. In case of time variant channel coefficients, a decision di- rected channel tracking algorithm for re-estimating the chan- nel coefficients is presented in section IV. The remodulation of the detected data can be done with or without exploiting channel decoding as demonstrated in section IV


read full report
ant.uni-bremen.de/sixcms/media.php/102/4750/SCI_2001_schmidt.pdf
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply
praveen99
Active In SP
**

Posts: 1
Joined: Sep 2010
#2
06-09-2010, 07:41 AM

can any one help me to complete the project and implimentation............ i need the full report of the project and implimentation.......
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Message
Type your reply to this message here.


Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
Exclamation Electronics: a systems approach 4th edition solutions Thijroden 1 196 08-10-2016, 12:13 PM
Last Post: amrutha735
  WIRELESS MIROSERWER seminar ideas 2 667 09-04-2016, 12:35 PM
Last Post: mkaasees
  AN OVERVIEW OF SMART ANTENNA TECHNOLOGY FOR MOBILE COMMUNICATIONS SYSTEMS seminar addict 3 1,539 07-04-2016, 11:24 AM
Last Post: mkaasees
  wireless electricity transmission ppt jaseelati 0 323 09-02-2015, 02:38 PM
Last Post: jaseelati
  global wireless e-voting ppt jaseelati 0 320 23-01-2015, 04:19 PM
Last Post: jaseelati
  ppt on trends in wireless computing jaseelati 0 265 21-01-2015, 03:23 PM
Last Post: jaseelati
  advanced cooling systems for automobiles ppt jaseelati 0 251 15-01-2015, 03:51 PM
Last Post: jaseelati
  wireless power theft monitoring system and indication at local substations. jaseelati 0 358 10-01-2015, 03:42 PM
Last Post: jaseelati
  intelligent wireless video camera wikipedia jaseelati 0 405 07-01-2015, 04:48 PM
Last Post: jaseelati
  employee tracking system project in android jaseelati 0 242 07-01-2015, 04:29 PM
Last Post: jaseelati