Institute of Electrical & Electronic Engineers
Cooperative jamming for multiuser Multiple Input Multiple Output (MIMO) broadcast channel is studied to enhance the physical layer security with the help of a friendly jammer. The authors assume the base station transmits multiple independent data streams to multiple legitimate users. During the transmission, however, there are multiple eavesdroppers with multiple antennas that have interests in the streams from the base station. In order to wiretap the desired streams, the eavesdroppers may collude or not, and maximize the Signal-to-Interference-plus-Noise Ratio (SINR) of the desired streams using receive beamforming.