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An alternative state diagram of HDB3
Kampol Woradit,Norrarat Wattanamongkhol,Paramin Sangwongngam,Lunchakorn Wuttisittikulkij 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper presents a new state diagram with the reduced number of system states for HDB3 line coding. Mathematical analysis for its autocorrelation as well as power spectral density are systematically derived in details and compared to existing approaches. It is shown that the proposed model provides an exact solution and the same as known results, thus serving as an alternative and effective means to solve this problem.
Multi-user MISO-OFDM for Secrecy SWIPT Networks
Pubet Sangmahamad,Kampol Woradit 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.1
This paper proposes the joint subcarrier allocation and power splitting ratio optimization algorithms for downlink communications in multiuser orthogonal frequency division multiplexing (OFDM) multiple-input single-output (MISO) networks with simultaneous wireless information and power transfer (SWIPT). It consists of single multi-antenna transmitter, and several multi-antenna receivers (users). Every user does the power splitting scheme to harvest energy and decode information simultaneously from the received signal. All users can eavesdrop each other. The first algorithm aims to maximize the average secrecy rate per user, while the second algorithm aims to maximize the worst user secrecy rate.