The invention discloses a method of security probability-based power allocation in a
millimeter wave
system. The method comprises the following steps: S1, an equivalent channel modeling step, whereina
millimeter wave channel model is established, and thus a discrete angular domain channel model is obtained; S2, a power allocation strategy defining step, wherein a minimum value of a receiving
signal-to-
noise ratio of a legal direction is forcibly restricted, an upper boundary of a receiving
signal-to-
noise ratio of an
eavesdropping direction is limited at the same time an allocation strategy of
total transmission power is formulated, and an effect that target security probability meets constraints of quality-of-
service demand is guaranteed; and S3, a power allocation step, wherein
artificial noise beamforming power allocation based on interruption is carried out, and performance evaluation is carried out on a final allocation result. The invention provides the power
allocation method with a data protection function, privacy and
confidentiality of data in a
wireless communication process can be effectively improved, established security probability is achieved, normalized safety
throughput is increased, and
system complexity is reduced.