Optical communication apparatus and method

摘要

An apparatus for optical communication and optical communication method are provided, the method comprising the steps of generating an optical signal for transmitting the sequence of information data, transmitting the sequence of information data as a sequence of transmit matrices, S(k) being the k-th transmit matrix and k being a positive integer, and wherein the sequence of transmit matrices is transmitted through an optical channel characterized by a unitary channel matrix H, receiving a sequence of receive matrices, the k-th receive matrix R(k) being expressed as: R(k)=H·S(k)+N(k) wherein k is a positive integer and N(k) is a complex matrix of noise samples and providing a sequence of decision matrices, the k-th decision matrix D(k) being expressed as: D(k)=RH(k−1)R(k).

主权项

1. An optical communication method, comprising
generating an optical signal for transmitting a sequence of information data; mapping the sequence of information data into a sequence of information matrices selected from an alphabet ={Q1, Q2, . . . , QN} of N complex 2×2 unitary matrices, a k-th one of the information matrices, Q(k), being a unitary matrix, and k being a positive integer; encoding the sequence of information matrices in a sequence of transmit matrices, wherein a k-th one of the transmit matrices, S(k), is expressed as:
S(k)=S(k−1)Q(k) transmitting the transmit matrices through an optical channel characterized by a unitary channel matrix H; receiving a sequence of receive matrices, a k-th one of the receive matrices, R(k), being expressed as:
R(k)=H·S(k)+N(k)wherein N(k) is a complex matrix of noise samples;characterized by;
providing a sequence of decision matrices, a k-th one of the decision matrices, D(k), being expressed as:
D(k)=RH(k−1)R(k);and
estimating the k-th information matrix by selecting from the alphabet the information matrix having the smallest distance measure to the k-th decision matrix D(k).