基于SDR平台的噪声聚合物理层安全传输方案的设计与实现

With feedback control method, the physical layer security scheme via noise aggregation can degrade the eavesdroppers channel quality and enhance the security performance of communication system by fully extracting the resources of inherent noise in wireless communication. In order to validate and evaluate the performance of the scheme, this paper designed and realized a practical scheme for transmitter and receiver with anti-wiretapping functions based on software defined radio platform. On basis of that, this paper established the anti-wiretapping test environment, which includes a source node, a destination node and an eavesdropper node. Taking the test case of image transmission, this paper evaluated some objective indicators, such as frame error, peak signal noise rate and the subjective quality of images. Test results show that there is satisfied SNR gain between Bob and Eve for the same frame error rate. Moreover, clear and recognized received images with higher peak signal noise rate prove the effectiveness of the noise aggregation scheme.