Generating method, receiving method and receiving device of leading signal

Abstract

The invention provides a generating method, receiving method and receiving device of a leading signal. The leading signal is generated by the time domain constant modulus sequence, including a full time domain structure of the basic segment and the repeating segment; the leading signal is used to perform delay autocorrelation leading symbol capture on one or more baseband signals, so as to intercept all or part of the signals containing the known sequence and the filling sequence of the leading signal under the corresponding bandwidth; and the signals are used for performing frequency offset estimation in the time domain or frequency domain with the known sequence and filling sequence under the bandwidth; timing synchronization is performed, whether an expected received signal is in the received signal or not is confirmed, and the bandwidth value is confirmed; therefore, the peak to average power ratio PAPR is lowered, and the generated leading signal can be applied to a single carriercommunication system. Because the modulator end does not need the discrete inverse Fourier transform IFFT module, the generating method of the leading signal is simplified on the premise of guaranteeing the excellent performance of the system, and the difficulty and complexity are reduced.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method for generating and receiving a leading channel and a corresponding device. Background technique [0002] In the existing communication physical layer system and broadcast physical layer system, the method for realizing time synchronization between the sending end and the receiving end is basically based on preamble symbols. The preamble signal is a symbol sequence known to both the sending end and the receiving end of the physical layer system. The preamble signal (Preamble) is used as the beginning of the physical frame and only appears once in each physical frame. It marks the beginning of the physical frame. The preamble must enable accurate and reliable time synchronization between the transmitter and receiver. At the same time, since the subsequent equalization decoding module of the receiver is very sensitive to the frequency offset of the carrier, the preamb...

AI Technical Summary

Problems solved by technology

However, the DVB_T2 and ATSC3.0 standards do not give a targeted and reasonable solution to the design of the preamble signal of a single-carrier communication system such as a satellite broadcasting system.

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