dvb-s and dvb-s2 signal automatic detection system and method

Abstract

The invention provides a system and a method for automatically detecting DVB-S signals and DVB-S2 signals. According to the system and the method, a mode control module is added in a demodulation module; whether received signals are DVB-S signals or DVB-S2 signals is detected and recognized automatically, and a corresponding signal type indication sign is given; and according to the signal type indication sign, one manner of a DVB-S processing manner and a DVB-S2 processing manner in the demodulation module is selected automatically, and received data are demodulated. Compared with a conventional scheme, the mode control module is added in the demodulation module, the design is simple, a mode of received signals is processed and judged automatically, the circuit design is simplified, resources are reused to the greatest extent, and the design cost and the system operation power consumption are reduced.

Description

Technical field

[0001] The invention relates to a signal detection and recognition in the field of digital television satellite broadcast reception. In particular, it is a method that can automatically detect and identify the type of received DVB-S signal and DVB-S2 signal, which relies on DVB-S2 frame detection and DVB-S FEC decoding characteristics, which is used in the demodulation module. Background technique

[0002] In recent years, wireless satellite broadcast communications have received widespread attention. DVB-S, as the mainstream satellite transmission standard of the first generation of digital satellite broadcasting, has been widely used in the world for more than ten years since its appearance. Compared with DVB-S, DVBS-2 has attracted widespread attention with its higher spectrum utilization, more advanced coding methods and system performance close to the Shannon limit. Therefore, DVB-S2 was approved by ETSI as the second-generation digital satellite broadcasti...

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