Timing recovery is one of the most important issues that need to be solved for a receiver. The key of timing recovery is the extraction of timing errors. Currently, the timing recovery in the satellite communication systems cannot meet the requirement of the real-time passive intermodulation (PIM) interference suppression. It calls for the study on improved algorithm that can be applied in the satellite communication system. And the improved algorithm should have small computation and a high running speed. This paper first introduces the overall structure of the traditional square timing recovery loop, and then proposes an improved square timing error detection algorithm. By using the Goertezl algorithm, this improved algorithm optimizes the step–extracting spectral components at the symbol rate 1/T. Finally, this paper simulates and analyzes the improved algorithm, as well as parameters’ influence on the performance of the algorithm. It is proved that the improved square timing error detection algorithm can greatly reduce the amount of computation under the premise of guaranteeing performance.
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This work was supported by the National Natural Science Foundation of China under Grant 61601027.
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