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In this paper, a novel decision feedback tracking method is proposed, which is based on frame demodulation for high-speed laser communication with less prior information. In order to reduce the length of the pilots and improve the tracking accuracy, a frequency control word addressing and pointing decision algorithm are introduced to recover the local pseudo code from the received data for tracking. Simulation results demonstrate that in the high-speed laser radar communication, this method has better tracking performance than traditional methods when the pilot length is short.
Inspec keywords: decision feedback equalisers; demodulation; codes; tracking; optical radar; optical links
Subjects: Optical radar; Communication channel equalisation and identification; Codes; Free-space optical links