You are here: silicon.com > Resources > White Papers > Networking and Communications > LAN - WAN > Local Area Networks (LAN)

Local Area Networks (LAN) White Papers

Synchronization in OFDM-Based WLAN With Transmit and Receive Diversities

Overview This paper deals with the feasibility of improving synchronization (packet detection and frequency synchronization) of OFDM systems by exploiting transmit and receive diversities. Starting from a performance analysis of SISO synchronization, SIMO, MISO and MIMO synchronization algorithms are proposed and analyzed step by step. Simulations for IEEE 802.11a/g/n-like systems in frequency-selective channels show that the performance of packet detection can be improved by 6.5 dB and the residual frequency synchronization error can be reduced by 68.7%, if 4 transmit antennas and 4 receive antennas are used. For that, carefully designed training sequences and respective transmitter and receiver algorithms are necessary.

Further White Paper Details
Publisher	Dresden University of Technology	File Format	PDF
Date Published	June 2005
Format	White Papers
Topics	Local Area Networks (LAN), Wireless LAN, Mobile - Wireless Communications

Did you find this white paper useful?

Defining a Mobile Architecture for Success: How, When and Why to Use a Multichannel Access Gateway

Publisher:
iAnywhere Solutions (Sybase)

Tags:
local area networks (lan)

Virtual Villains of Security & PCI Compliance: Future Challenges of MPLS, Virtual Machines and VLANs

Publisher:
SecureState

Future-Proofing the Wiring Closet With Resilient and Scalable Modular Switch/Routers

Publisher:
Force10 Networks

Tags:
ethernet

Redundancy in Serial-to-Ethernet Communications

Publisher:
Digi International

Tags:
ethernet

Technology Brief: Carrier Vs. Enterprise Ethernet Silicon

Publisher:
Lightstorm Networks

Tags:
ethernet

Intel develops chip error detection tool

The error is expected to most easily affect the sub-0.25 micron process technology as alpha particles from the packaging around chips intrude on the technology. Intel has developed a simulation tool to test for so-called 'soft errors' that could...

Channel:
PDAs

Wi-Fi gets a sense of direction

Optical antennas, by contrast, transmit and receive infrared signals, the invisible portion of the electromagnetic spectrum that lies between visible light and radio waves. Optical antennas are already available.

Channel:
Mobile & Wireless

Peter Cochrane's Uncommon Sense: Wireless everything

A listener would need a receiver capable of selecting all of these channels at the same time to extract and recover the conversation. We can create complex digital signals that occupy a broad swath of frequency space and still filter them out at...

Channel:
Comment & Analysis

Bluetooth shatters milestone

The specification also uses new error-detection methods to improve the quality of voice connections, which is important for Bluetooth headsets. Frequency hopping allows Bluetooth to find parts of the spectrum not being used by other devices...

Peter Cochrane's Blog: More wireless equals more wires

Antennas that automatically beam form and steer, combined with coding and signalling systems that avoid each other and therefore minimise interference, plus a least transmit energy regime, are only the start.

Norwich gets free city-centre wi-fi

Beyond that, the nodes transmit on the standard wi-fi frequency of 2.4GHz. Connectivity between the mesh nodes is also currently handled on 5.8GHz, although Baker suggested Ofcom would soon relax restrictions on the 5.4GHz frequency (currently...

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:

Local Area Networks (LAN) White Papers

Synchronization in OFDM-Based WLAN With Transmit and Receive Diversities

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