A method for generating and receiving a preamble signal and a receiving device

Abstract

The invention provides a method for generating and receiving a preamble signal and a receiving device. The preamble signal is generated by the time-domain constant modulus sequence, including the full time-domain structure of the basic segment and the repeating segment. The preamble signal is used to capture the preamble symbols of one or more baseband signals with delayed autocorrelation, and all or part of the preamble containing the corresponding bandwidth is intercepted. The known sequence of the signal and the signal of the filling sequence are used to estimate the frequency offset in the time domain or the frequency domain by using the known sequence and the filling sequence in the bandwidth, timing synchronization and confirm whether there is a desired received signal in the received signal, confirm The bandwidth value, thereby reducing the peak-to-average ratio PAPR, so that the generated preamble can be applied to a single-carrier communication system. Since the modulator does not need an inverse discrete Fourier transform IFFT module, on the premise of ensuring the excellent performance of the system, it also simplifies the generation method of the preamble signal and reduces the difficulty and complexity.

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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