关键词: 自由空间光通信, 量子通信, 信号检测, 量子检测理论

Abstract:

Aiming at that the multidimensional orthogonal envelope signal performance under quantum reception is still unclear with the existence of background noise, the multidimensional space recursive law is used to receive multidimensional orthogonal envelope signal. Simultaneously, the angle between received photon signal state and measuring state is reduced by a pivoting way to achieve the optimal detection design of quantum receiver. Also, the expression of maximum correct detection probability under multidimensional orthogonal envelope signal is unified. Numerical analysis indicates that, compared with the direct direction way, the space pivoting way to receive multidimensional orthogonal envelope signal can improve the receiver direction performance when influenced by background noise because it reduces the bit error rate and the symbol error rate.

Key words: free space optical communication, quantum communication, signal detection, quantum detection theory