【2010-08-26】Downlink Interference Alignment for Cellular Systems

Poster:Post date:2010-08-23

Title: Downlink Interference Alignment for Cellular Systems
Speaker:  Dr. Minnie Ho from Intel Labs
Time: 14:00 - 15:00 , Aug 26 (Thu), 2010
Place: Room 102, CSIE Building


In this talk, we present an interference alignment (IA) technique for a downlink cellular system. In the uplink, IA schemes need channel-state-information exchange across base-stations of different cells, but our downlink IA technique requires feedback only within a cell. As a result, the proposed scheme can be implemented with a few changes to an existing cellular system where the feedback mechanism (within a cell) is already being considered for supporting multi- user MIMO. Not only is our proposed scheme implementable with little effort, it can in fact provide substantial gain especially when interference from a dominant interferer is significantly stronger than the remaining interference: it is shown that in the two-isolated cell layout, our scheme provides four-fold gain in throughput performance over a standard multi-user MIMO technique. We also show through simulations that our technique provides respectable gain under a more realistic scenario: it gives approximately 20% gain for a 19 hexagonal wrap-around-cell layout. Furthermore, we show that our scheme has the potential to provide substantial gain for emph{macro-pico} cellular networks where pico-users can be significantly interfered with by the nearby macro-BS. This is work jointly done with Prof. David Tse and Chang-ho Suh of UC-Berkeley.

Short Biography:

   Minnie Ho is a Principal Engineer in the Wireless Communication Lab within Intel Labs. She has been involved in a number of global wireless standards, including cellular standards (co-editor for the MIMO portions of the IEEE 802.16m WiMAX standard, Intel Labs tech lead for 3GPP-LTE in 2006), LAN standards (drove development of MIMO techniques for the IEEE 802.11n WiFi standard), and PAN standards (pushed for FCC legalization of an Ultra-wideband PAN technology). Prior to Intel, she was in four Silicon Valley communications start-ups, developing technologies in UWB (founding team), fiber-optics, wireless local loop, and ADSL (one of the founding patent inventors) . She received her Ph.D. at Stanford University, and B.S.E.E. at Princeton.
Last modification time:2010-08-31 PM 4:40

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