1. UPC – project MESA Array Antennas for Packet Transmission Networks Antonio Pascual Iserte, Nada Ahmed Awad, Ana I. Pérez-Neira DEPT. OF SIGNAL THEORY AND COMMUNICATIONS DEPT. OF SIGNAL THEORY AND COMMUNICATIONS POLYTECHNIC UNIVERSITY OF CATALONIA (UPC) POLYTECHNIC UNIVERSITY OF CATALONIA (UPC) Communications Signal Processing Group, Barcelona, SPAIN Communications Signal Processing Group, Barcelona, SPAIN TELECOMMUNICATIONS TECHNOLOGICAL CENTER OF CATALONIA TELECOMMUNICATIONS TECHNOLOGICAL CENTER OF CATALONIA (CTTC), Barcelona, SPAIN (CTTC), Barcelona, SPAIN {nahmed,tonip,anuska}@gps.tsc.upc.es {nahmed,tonip,anuska}@gps.tsc.upc.es Workshop on Broadband Wireless Ad-Hoc Networks and Services, 12th-13th September 2002, ETSI,Sophia Antipolis,France

2. UPC – project MESA  Ad-hoc networks operate in the unlicensed 2.4GHz ISM band.  Different types of Interference sources.  Use of spatial diversity schemes to combat interference in a time variant interference scenario.  receiver architecture enhanced with the Generalized Sidelobe Canceller (GSLC).  Simulations

3. UPC – project MESA Generalized SideLobe Canceller Signal Model: Array design -“quiescent”: -blocking matrix: -adaptive beamvector: (NLMS)

4. UPC – project MESA SNIR behavior for (non-)adaptive algorithms (GSLC).

5. UPC – project MESA BER evaluation for (non-)adaptive algorithms (GSLC). PARAMETERS -Angular spread: 15º -IEEE 802.11b interference: mean SIR = -10 dB