Data Retransmission For Atmospheric Free Space Optical Communication System

摘要

Exemplary embodiments described a transmission scheme for use in a bi-directional Free Space Optical (FSO) communication system. Each node locally stores a transmitted data block until and acknowledgement is received that it was properly decoded. In the event that a decode was unsuccessful, the data is retransmitted. The receiving node may then add the received signals to then attempt a decode on a combined signal. The system may also include dynamic controls such that the retransmitted signal may be optimized to improve the probability of a successful decode.

主权项

1. A Free Space Optical (FSO) communication unit, comprising:
an optical transmitter for transmitting an optical signal; an optical detector for receiving optical signals and converting the optical signals to electrical signals; a processor for decoding the optical signals; and a memory for storing a data block; wherein the FSO communication unit is configured to determine a symbol with a certain confidence from the electrical signal, if a symbol is not determined with at least a threshold confidence, the FSO communication unit, through the optical transmitter, sends a retransmission request and the FSO communication unit stores the electrical signal in the memory.