Patent ID: 9060264
Filing Date: 2015-06-16
Classification: H04B,H04L,H04W

Abstract:
1. A secure communication method, which is performed by a second transmitter in a wireless communication environment in which there is a wiretapper wiretapping a signal transmitted by a first transmitter to a first receiver, the method comprising: determining an optimization influence of the second transmitter based on channel information of the second transmitter and the first transmitter; calculating a beamforming vector comprising first and second beamforming vectors based on channel information between the second transmitter and the first receiver and channel information between the second transmitter and a second receiver, according to the optimization influence; and performing beamforming on the first receiver and the second receiver with the calculated beamforming vector, wherein the second transmitter is configured as a secondary user's device that leases a frequency allocated to a primary user corresponding to the first transmitter.