Upper bound for the loss of energy detection in multipath fading cognitive radio communications = 다중 경로를 고려한 인지 통신을 위한 에너지 검출법의 한계 및 보안알고리즘 제안

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In this paper, the loss of energy detection compared with optimal sensing caused by neglecting signal correlation due to multipath fading is considered. The loss factor or relative performance of energy detection compared with optimal sensing is analyzed using Pitman``s asymptotic relative efficiency (ARE) which is defined as the ratio of the required number of samples of one detector to that of the other to yield the same detection performance in large sample scheme. Under the assumption of L-tap finite impulse response (FIR) channel with zero-mean independent and identically distributed (i.i.d.) tap coefficients, it is shown that the loss factor of the energy detection relative to optimal sensing is no larger than 1/2 in large delay spread case (i.e., strong correlation); under the same signal power condition the required number of samples for energy detection neglecting the signal correlation is no more than twice of that required for optimal sensing exploiting the signal correlation fully.
Advisors
Sung, Young-Chulresearcher성영철researcher
Description
한국과학기술원 : 전기 및 전자공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
419144/325007  / 020083441
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과, 2010.2, [ v, 37 p. ]

Keywords

multipath fading; cognitive radio; energy detection; 에너지 검출; 인지 통신; optimal sensing

URI
http://hdl.handle.net/10203/36585
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=419144&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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