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무μμλ‘ μμΉν λ€μ λμ²μκ° μ‘΄μ¬νλ μ μ΄μ€ μ€κ³ μμ€ν μ 보μ μ±λ₯
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Όλ¬Έ (μμ¬)-- μμΈλνκ΅ λνμ 곡과λν μ κΈ°Β·μ 보곡νλΆ, 2017. 8. μ΄μ¬ν.Full-duplex (FD) operation improves the spectral eο¬ciency of a relay system where the relay simultaneously transmits and receives signals on the same channel. The performance of FD relay systems is limited by self-interference, i.e., signal leakage from the relays transmit antenna to its receive antenna. However, in the FD relay system with malicious eavesdroppers, simultaneous transmission from the source and relay confuses the eavesdroppers.
In this thesis, we investigate a FD relay system where a source communicates with a destination via a decode-and-forward relay in the presence of randomly located eavesdroppers. We derive analytical expressions for the secrecy outage probability and the average secrecy rate of the system. Simulation results show that the secrecy performance of the system is improved as the density of eavesdroppers decreases. It is also shown that the FD re-lay system has higher secrecy performance than the half-duplex relay system when a large portion of self-interference is cancelled.λ³Έ λ
Όλ¬Έμμλ 무μμλ‘ μμΉν λ€μ λμ²μκ° μ‘΄μ¬ν λ λ³΅νΈ ν μ μ‘ μ λ¬ λ°©μμ μ¬μ©νλ μ μ΄μ€ μ€κ³κΈ°λ₯Ό ν΅ν΄ μ‘μ κΈ°μ μμ κΈ°κ° ν΅μ νλ μ μ΄μ€ μ€κ³ μμ€ν
μ λν΄ μ°κ΅¬νλ€. μ‘μμ κΈ° μ¬μ΄μ λ¨λλ¨ μ νΈλκ°μμ‘μλΉμ κ°μ₯ ν΄λ‘μ΄ λμ²μμμ μ νΈλκ°μμ‘μλΉμ λμ λΆν¬ν¨μλ₯Ό μ λνμ¬ μμ€ν
μ 보μ λΆλ₯ νλ₯ κ³Ό νκ· λ³΄μ μ μ‘λ₯ μ λΆμνλ€. λͺ¨μ μ€νμ ν΅ν΄ μμ€ν
μ 보μ λΆλ₯ νλ₯ κ³Ό νκ· λ³΄μ μ μ‘λ₯ μ λΆμ κ²°κ³Όκ° μ€ν κ²°κ³Όμ μΌμΉν¨μ νμΈνλ€.Chapter 1 Introduction 1
Chapter 2 System Model 5
Chapter 3 Secrecy Performance Analysis 11
3.1 SINR Distribution 12
3.2 Secrecy Outage Probability 17
3.3 Average Secrecy Rate 20
Chapter 4 Simulation Results 22
Chapter 5 Conclusion 38Maste