（蘭州交通大學 電子與信息工程學院，甘肅省蘭州市 郵編：730070）
摘要：本文研究了高斯MISO竊聽信道的可達保密速率問題。系統模型包括一個發送者，一個接收者和一個竊聽者。發送者將發送功率分成兩部分，一部分功率發送信號，一部分功率發送人工干擾信號。推導出了采用人工干擾時的系統可達保密速率公式，并通過優化信號功率和噪聲功率的比例，最大化可達保密速率。仿真結果驗證了本文提出的人工干擾策略的有效性。
關鍵詞：竊聽信道；可達保密速率；人工干擾；MISO;
中圖分類號：TN929       文獻標識碼：A
Research the achievable secrecy rate of MISO wiretap channel based on artificial interference
Zhang Jinhu
（School of Electrical Information Engineering, Lanzhou Jiaotong University, lanzhou730070, China Zhang Jinhu E-mail:249940002@qq.com）
Abstract: This paper studies the secrecy rate on Gauss MISO wiretap channel. The system model consists of a sender, a receiver and an eavesdropper. The transmit power of the sender is divided into two parts, one part is used to transmitting signal, another part is used to transmitting artificial interference. Using artificial interference, the system can reach positive achievable secrecy rate , and maximum the achievable secrecy rate by optimizing the signal power and noise power ratio . The simulation results verify the validity of the artificial interference strategy proposed in this paper.
Key words: wiretap channel; Achievable secrecy rate; artificial interference; MISO

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作者簡介：張金虎，男，河北廊坊人，蘭州交通大學電子與信息工程學院在讀碩士研究生，主要研究方向:通信與信息系統。