Broadband Wireless Communication

5/14/01


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Table of Contents

Broadband Wireless Communication

The world is going wireless !

Wireless Requirements

Long term strategy executed in a phased approach

OFDM Modem Architecture

Improved equalizer for better performance with QAM

Second generation OFDM Modem

Wireless set-up at 5.2 GHz

Long term strategy executed in a phased approach

IMEC’s solution: WLAN-in-a-package

System model includes 4 most important front-end impairments

PA can be operated with only 15 dB back-off (IIP3 - Pin)

Phase noise must be K<-32dBc for a Lorentzian model

Demonstrator: Single-package 5 GHz receiver RF module

Single-package 5 GHz receiver RF module

Co-Design of ASIC and MCM allows optimal trade-offs

Better VCO performance with high-Q MCM passives

4.7 GHz VCO with MCM-D inductors

Complete RF Transceiver in a single package

Next step: from antenna to DC in a single package

Transmitter architecture exploration

Single-package implementation and demonstration

Long term strategy executed in a phased approach

Turbo Decoding Scheme

Turbo coding significantly improves performance

Systematic memory optimiza-tions reduce power consumption

Spatial Division Multiple Access (SDMA)

OFDM / SDMA Architecture with Per-carrier Processing

OFDM/SDMA Multiplies Network Capacity

Multimedia home gateway requires a QoS MAC

Long term strategy executed in a phased approach

Wireless Personal Network enables new applications

Multiple Antennas : Scalability of Link Capacity

SC-CP offers OFDM performance with low PAPR

Scalability with Hybrid OFDM

Capacity search : link adaptation to avoid fading margin

Substrate noise coupling is a problem for integrated radio’s

Substrate noise spectral peaks 40 dB larger than noise floor

Applying the analysis to the WLAN OFDM baseband chip

Our Goals

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Copyright IMEC, 2001

 

 

Wireless Communication, 2001. © Marc Engels, Liesbet van der Perre et al., IMEC Leuven