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Jaiganesh Balakrishnan (Texas Instruments)

Multi-band OFDM Ultra Wide Band (UWB) Communication System for High Speed Wireless Personal Area Networks (WPAN).

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Multi-band OFDM UWB System (1)

WirelessPrinting

Wireless Display

Wireless Storage

Set-top Box

In 2002, FCC opened up the spectrum from 3.1 – 10.6 GHz to allow low power UWB devices.

Opportunity for high data rate communication (> 100 Mbps) over short distances (up to 10 meters) for WPAN applications.

Challenges: (1) World-wide regulatory compliance (2) Wide-band processing (3) Low cost solution (4) Low transmit power (5) Multi-path performance and (6) Co-existence

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The multi-band OFDM technology addressed the challenges faced by UWB devices and shifted focus away from traditional impulse radio systems.

Multi-banding and OFDM provided spectral flexibility enabling world-wide regulatory compliance.

Time Frequency Coding addressed the issue of wide-band processing while simultaneously enhancing performance.

Innovative signal structure using OFDM, enabled excellent multi-path performance, albeit at a low implementation complexity.

Multi-band OFDM UWB System (2)

Multi-band OFDM

Receiver

Multi-band OFDM

Transmitter

Frequency Plan

3432 3960 4488 MHz

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The Multi-band OFDM system has been standardized by the WiMedia Alliance, approved by ECMA International and published as the ECMA-368 standard.

A number of products incorporating the Multi-band OFDM UWB technology have started hitting the market.

Wireless USB

Wireless HDMI

Evinced keen interest in the academic community leading to numerous research publications.

Multi-band OFDM UWB System (3)