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DTSTAMP:20130319T132644Z
UID:D327CEC2-E1E8-1030-AD29-0050568D3657
DTSTART;TZID=Asia/Kolkata:20130320T180500
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DESCRIPTION:Dear all\, Details of second talk in Seminar Series on SP/COM: 
 Title: Power allocation for OFDM-based cognitive radio systems under avera
 ge interference constraint Date/Time: March 20\, 2013\, 6.05 pm Venue: DA 
 229\, ACES Speaker: Kedar Kulkarni\, PhD Student Abstract: Cognitive radio
  is an opportunistic spectrum access technique to efficiently utilize spec
 trum allocated to licensed users (or Primary users). Orthogonal frequency 
 division multiplexing (OFDM) is considered as a potential transmission tec
 hnology for cognitive radio systems due to its numerous advantages. While 
 using the available spectrum\, it has to be ensured that performance of th
 e primary system doesn’t degrade due to interference from cognitive
 /secondary user. Thus power allocation techniques like water-filling or un
 iform allocation which are used in classical OFDM-systems have to be modif
 ied to take into consideration the interference constraint. We will discus
 s mathematical formulation of such a power allocation problem for a given 
 spectrum scenario. Methods considered in the literature consider a static 
 spectrum scenario where bands not occupied by primary users remain unoccup
 ied throughout the transmission period of secondary user. Such power alloc
 ation schemes may cause more interference to primary system in a practical
  scenario where primary users can arrive or depart at any time. We will di
 scuss a power allocation scheme which takes into account this dynamic acti
 vity of primary users. You are encouraged to go through following referenc
 es before coming to the talk. 1. Bansal\, G.\; Hossain\, J.\; Bhargava\, V
 .K.\, "Optimal and Suboptimal Power Allocation Schemes for OFDM-based Cogn
 itive Radio Systems\," Wireless Communications\, IEEE Transactions on \, v
 ol.7\, no.11\, pp.4710\,4718\, November 2008 2. Bansal\, G.\; Duval\, O.\;
  Gagnon\, F.\, "Joint Overlay and Underlay Power Allocation Scheme for OFD
 M-Based Cognitive Radio Systems\," Vehicular Technology Conference (VTC 20
 10-Spring)\, 2010 IEEE 71st \, vol.\, no.\, pp.1\,5\, 16-19 May 2010 Regar
 ds\, Sanket Kalamkar Ph.D. student(Signal processing\,communications and n
 etworking)\, Department of Electrical Engineering\, Indian Institute of Te
 chnology\, Kanpur Web Page: http://home.iitk.ac.in/~kalamkar\n\nCo-sponsor
 ed by: Mr. Sanket Kalamkar\n\nSpeaker(s): \, \, \, \n\nRoom: DA 229\, Bldg
 : ACES\, Electrical Engineering Department\, Indian Institute of Technolog
 y Kanpur\, Kanpur\, Uttar Pradesh\, India\, 208016
LOCATION:Room: DA 229\, Bldg: ACES\, Electrical Engineering Department\, In
 dian Institute of Technology Kanpur\, Kanpur\, Uttar Pradesh\, India\, 208
 016
ORGANIZER:kalamkar@iitk.ac.in
SEQUENCE:0
SUMMARY:IEEE Student Seminar: Power allocation for OFDM-based cognitive rad
 io systems under average interference constraint
URL;VALUE=URI:https://events.vtools.ieee.org/m/17665
X-ALT-DESC:Description: <br />Dear all\,\n\nDetails of second talk in Semin
 ar Series on SP/COM:\n\nTitle: Power allocation for OFDM-based cognitive r
 adio systems under\naverage interference constraint\nDate/Time: March 20\,
  2013\, 6.05 pm\nVenue: DA 229\, ACES\nSpeaker: Kedar Kulkarni\, PhD Stude
 nt\n\nAbstract: Cognitive radio is an opportunistic spectrum access techni
 que to\nefficiently utilize spectrum allocated to licensed users (or Prima
 ry\nusers). Orthogonal frequency division multiplexing (OFDM) is considere
 d as\na potential transmission technology for cognitive radio systems due 
 to its\nnumerous advantages.\n\nWhile using the available spectrum\, it ha
 s to be ensured that performance\nof the primary system doesn’t deg
 rade due to interference from\ncognitive/secondary user. Thus power alloca
 tion techniques like\nwater-filling or uniform allocation which are used i
 n classical\nOFDM-systems have to be modified to take into consideration t
 he\ninterference constraint. We will discuss mathematical formulation of s
 uch\na power allocation problem for a given spectrum scenario.\n\nMethods 
 considered in the literature consider a static spectrum scenario\nwhere ba
 nds not occupied by primary users remain unoccupied throughout the\ntransm
 ission period of secondary user. Such power allocation schemes may\ncause 
 more interference to primary system in a practical scenario where\nprimary
  users can arrive or depart at any time. We will discuss a power\nallocati
 on scheme which takes into account this dynamic activity of\nprimary users
 .\n\nYou are encouraged to go through following references before coming t
 o the\ntalk.\n1.      Bansal\, G.\; Hossain\, J.\; Bhargava\, V.K.\, "Opti
 mal and Suboptimal Power\nAllocation Schemes for OFDM-based Cognitive Radi
 o Systems\," Wireless\nCommunications\, IEEE Transactions on \, vol.7\, no
 .11\, pp.4710\,4718\,\nNovember 2008\n\n2.      Bansal\, G.\; Duval\, O.\;
  Gagnon\, F.\, "Joint Overlay and Underlay Power\nAllocation Scheme for OF
 DM-Based Cognitive Radio Systems\," Vehicular\nTechnology Conference (VTC 
 2010-Spring)\, 2010 IEEE 71st \, vol.\, no.\,\npp.1\,5\, 16-19 May 2010\n\
 nRegards\,\nSanket Kalamkar\nPh.D. student(Signal processing\,communicatio
 ns and networking)\,\nDepartment of Electrical Engineering\,\nIndian Insti
 tute of Technology\, Kanpur\nWeb Page: http://home.iitk.ac.in/~kalamkar
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