Somsak Kittipiyakul (สมศักดิ์ กิตติปิยกุล)

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Ph.D. Candidate Electrical and Computer Engineering, UCSD Email: skittipi@ucsd.edu Advisor: Prof. Tara Javidi Affiliations: Advanced Network Sciences (ANS), Center for Wireless Communications (CWC). Research Interests: Wireless communication, networking, and resource allocation and scheduling. Performance analysis of queuing systems using large-deviations techniques. My research has been in two areas: (1) Resource allocation in OFDMA networks, optimizing the average delay performance. (2) Asymptotic cross-layer performance optimization (considering both queuing delay violation and channel decoding/outage error) for single-user and multiple-user environment over several types of wireless channels, e.g., multi-antenna (MIMO) channels, MIMO multiple access (MAC) channels, cooperative relay channels, and time-diversity channels. In the multiple-user environment, the benefit of statistical multiplexing due to dynamic scheduling is quantified Currently, I am working on the many-sources large-deviations analysis of the buffer overflow probability of wireless networks with the maximum-weight dynamic scheduling. (Overview slides). Publications/Preprints: :: Cross-layer Optimization :: Relay scheduling and cooperative diversity for delay-sensitive and bursty traffic S. Kittipiyakul and T. Javidi, Allerton’07, Sept. 2007. (invited) High-SNR analysis of outage-limited communications with bursty and delay-limited information S. Kittipiyakul, P. Elia, and T. Javidi, submitted (Nov 2007). Cooperative Diversity in Wireless Networks with Stochastic and Bursty Traffic P. Elia, S. Kittipiyakul, and T. Javidi, ISIT’07, June 2007. On the Responsiveness-Diversity-Multiplexing Tradeoff P. Elia, S. Kittipiyakul, and T. Javidi, WiOpt’07, April 2007. Optimal operating point for MIMO multiple access channel with bursty traffic S. Kittipiyakul and T. Javidi, IEEE Trans. on Wireless Communications, v. 6, no. 12, Dec. 2007. Optimal operating point in MIMO channel for delay-sensitive and bursty traffic S. Kittipiyakul and T. Javidi, ISIT’06, July 2006. :: OFDMA Scheduling :: Delay-optimal server allocation in multi-queue multi-server systems with time-varying connectivities S. Kittipiyakul and T. Javidi, submitted to Trans. on Info. Theory, June 2007, revised Feb 2008. Resource allocation in OFDMA with time-varying channel and bursty arrivals S. Kittipiyakul and T. Javidi, IEEE Communications Letters, v. 11, no. 9, pp. 708-710, Sept 2007. Subcarrier allocation in OFDMA systems: beyond water-filling S. Kittipiyakul and T. Javidi, Asilomar Conf., Nov 2004. A Fresh Look at Optimal Subcarrier Allocation in OFDMA Systems S. Kittipiyakul and T. Javidi, CDC, Dec 2004.

Last Updated: May 28, 2008