自适应波束成形与Radio Transformer结合的物理层安全框架提升无线通信保密性，通过动态自编码器优化传输策略并注入可控噪声干扰窃听者，实测在DeepMIMO数据集上使秘密速率、误码率和中断概率显著优于LSTM和GNN基线。 在动态且资源受限的环境中，对安全无线通信 ...

Federal type 30 radio frequency transformer on base, "Federal Telephone & Telegraph Co. / Buffalo, N.Y. / U.S.A. / Type No. 30 / 275-600 meters". Commercial radio frequency coil covering 275-600 ...

A square black metal housing enclosing a transformer, two contacts on front and two on back. Stamped on back: “Type 271 / M.F. Transformer / G. Sec”; on front: “General Radio Co. / Cambridge, Mass. / ...