http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Shama N. Islam (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Islam, Shama N.,Durrani, Salman,Sadeghi, Parastoo The Korea Institute of Information and Commucation 2016 Journal of communications and networks Vol.18 No.5
Multi-way relay networks (MWRNs) allow multiple users to exchange information with each other through a single relay terminal. MWRNs are often incorporated with capacity achieving lattice codes to enable the benefits of high-rate signal constellations to be extracted. In this paper, we analytically characterize the symbol error rate (SER) performance of a functional decode and forward (FDF) MWRN in the presence of channel estimation errors. Considering M-ary quadrature amplitude modulation (QAM) with square constellations as an important special case of lattice codes, we obtain asymptotic expressions for the average SER for a user in FDF MWRN. The accuracy of the analysis at high signal-to-noise ratio is validated by comparison with the simulation results. The analysis shows that when a user decodes other users with better channel conditions than itself, the decoding user experiences better error performance. The analytical results allow system designers to accurately assess the non-trivial impact of channel estimation errors and the users' channel conditions on the SER performance of a FDF MWRN with M-QAM modulation.
-
Shama N. Islam,Salman Durrani,Parastoo Sadeghi 한국통신학회 2016 Journal of communications and networks Vol.18 No.5
Multi-way relay networks (MWRNs) allow multiple usersto exchange information with each other through a single relayterminal. MWRNs are often incorporated with capacity achiev-ing lattice codes to enable the benefits of high-rate signal constel-lations to be extracted. In this paper, we analytically character-ize the symbol error rate (SER) performance of a functional de-code and forward (FDF) MWRN in the presence of channel esti-mation errors. ConsideringM-ary quadrature amplitudemodula-tion (QAM) with square constellations as an important special caseof lattice codes, we obtain asymptotic expressions for the averageSER for a user in FDF MWRN. The accuracy of the analysis athigh signal-to-noise ratio is validated by comparison with the sim-ulation results. The analysis shows that when a user decodes otherusers with better channel conditions than itself, the decoding userexperiences better error performance. The analytical results al-low system designers to accurately assess the non-trivial impact ofchannel estimation errors and the users’ channel conditions on theSER performance of a FDF MWRN withM-QAM modulation.
-
Impact of optimal false data injection attacks on local energy trading in a residential microgrid
Shama N. Islam,M.A. Mahmud,A.M.T. Oo 한국통신학회 2018 ICT Express Vol.4 No.1
This paper illustrates the vulnerability of local energy trading to false data injection attacks in a smart residential microgrid and demonstrates the impact of such attacks on the financial benefits earned by the participants. In a local energy market, the attacker can overhear the energy generation and consumption patterns of legitimate participants and based on this, optimize its attack signal to achieve maximum benefits either as a buyer/seller, while balancing the supply–demand to remain undetected. For such a system, we have formulated an optimization problem at the attacker, to extract the maximum possible benefits from legitimate participants. The numerical results show that the false data injection from the attacker causes significant losses in the benefits of legitimate participants, up to a reduction of 94% in certain hours.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
