You are here: silicon.com > Resources > White Papers > Networking and Communications > Mobile and Wireless > Wireless LAN

Wireless LAN White Papers

Channel Estimation for D-BLAST OFDM Systems

Overview Diagonal Bell Laboratories Layered Space-Time (DBLAST) structure offers a low complexity solution to realize the attractive capacity of Multiple-Input And Multiple-Output (MIMO) systems. This paper applies D-BLAST in Orthogonal Frequency Division Multiplexing (OFDM) systems and addresses the issue of channel estimation. Different from other MIMO-OFDM, where symbols at all tones are always available for decision-directed channel estimation, in D-BLAST OFDM, the authors update estimated channel parameters each time a layer is detected with a Least Square (LS) approach, using a pieced combination of received signals at previous and current OFDM blocks. The initial estimate is further refined by a robust estimator to exploit the time correlation of channel parameters among OFDM blocks. Computer simulation results show the performance improvement over block-wise channel estimation.

Further White Paper Details
Publisher	Georgia Institute of Technology	File Format	PDF
Date Published	April 2007
Format	White Papers
Topics	Wireless LAN, Mobile - Wireless Communications, Wireless

Did you find this white paper useful? 3 out of 5 users found this white paper useful

Caldera buys SCO for $145m

Tony Lock, senior analyst for Bloor Research, said Caldera had made the purchase to exploit SCO's distribution channels. Caldera will also be able to exploit SCO's current customers, and use the credibility they have as a well respected Unix vendor.

Channel:
Desktops

Three security threats you'll never have heard of

Most of the attacks exploit the vulnerabilities caused by developers' oversights, as it is impossible to build software where every single possibility is taken into consideration. Security expert Wray said although most companies are aware of...

Channel:
Security Strategy

Ovum On: Wireless spam

NTT DoCoMo also blocks reception of emails sent en masse to unspecified addresses and has applied in court to restrain spam-mail senders. The company has also provided a range of different options for blocking out spam messages, doubling the amount...

Channel:
Comment & Analysis

Brunel University's Business Class: Create a living IT system

Breaking a business down by services offered rather than by activity and tasks may help to avoid this common stumbling block - it’s certainly a different approach. An important point to consider here is that, with this high level of user input, the...

Radioactive: Bluetooth - survival of the fastest

The opposing technology approaches are orthogonal frequency division multiplexing (OFDM) and direct sequence (DS)-UWB. The general direction they will be taking is to create a convergence layer that will allow device manufacturers to abstract the...

Voice biometrics coming to phone banking

The product generates a risk score by looking at the voiceprint as well as other parameters, such as the phone number and user behaviour profiles, RSA said. Low-risk transactions proceed uninterrupted, while transactions with a high-risk score are...

Live Webcast: Telecoms 2.0 - Where is telecoms heading?

In this webcast, our panel of experts will review where we are with next generation telecoms in the UK, working through the concept of 'Telecoms 2.0': - Realising the potential of Next Generation Networks - why it isn't just about the technology? - What attributes should firms be looking for in their telco partner? - Is the relationship between telco provider and customer changing? - What things need to happen to make next generation services a reality? - You say you want the supplier to change. Do you want to change too? - What is Telecoms 2.0?

Publisher:
ZDNet UK

Telecom 2.0: Mind over matter

ntl:Telewest Business believes that the role of the telco is evolving. Gone are the days when it was enough to simply focus on circuits and minutes, customers now need a far higher degree of interaction and look for suppliers who will talk business solutions with them.

Publisher:
ntl:Telewest Business

IBM Information Server Change Data Capture

In today's fast-paced world, access to real-time data has never been more important. To be successful, organizations need to be able to report and analyze corporate data quickly and easily, regardless of what applications created the data, what platform they're running on, or what database they're stored in.

Publisher:
IBM

An examination of server consolidation: the trends that can drive efficiencies and help businesses gain a competitive edge

This white paper provides a starting point for organizations contemplating server consolidation. It includes an overview of server consolidation concepts and techniques and provides guidance on methodologies. It also looks at the potential cost savings associated with server consolidation and offers information on how organizations can sustain the advantage they have gained by consolidating their servers.

Publisher:
IBM

Also on silicon.com

Site Navigation:

Wireless LAN White Papers

Channel Estimation for D-BLAST OFDM Systems

Quick Sitemap Links:

About Us

Search

Blogs

Verticals

Advertising Features

CNET Networks in Europe

CNET Networks in the United States

CNET Networks in Asia Pacific