A process for the atmospheric optical free space transmission of digital signals and receiver for the method

摘要

In the case of a process for the atmospheric optical free space transmission of digital signals, in the case of a laser beam at the transmitting end by means of a data reception with direct detection permitting modulation, i.e, not only with one of the pseudo - incoherent directly detecting receipt of which enables the dpsk - modulation modulated and on the receiver side in a demodulator (7) directly, which is constructed as an incoherent detection is carried out, is additionally at the receiving end in a coherent, with a laser - local oscillator (lo) is operated in a demodulator (6) is carried out a second detection. The two by means of the two demodulators (6, 7) detected diversity of electrical signals are so as to form a signal were converted ends selection - or combined subjected to the process.Use in the case of atmospheric optical free space communication.