Method and device for receiving preambles

Abstract

The invention provides a method and a device for receiving a preamble, in view of at least one time domain symbol with a predetermined three-section time domain structure. The method and the device are characterized in that a preliminary timing synchronization mode comprises: by using a unique processing relationship and / or modulation relationship between the predetermined three-section time domain structures, delayed slip autocorrelation is carried out to acquire one group or multiple groups of cumulative correlation values; based on the one group or multiple groups of cumulative correlation values, after delay relationship matching and / or unique predetermined mathematical operation are / is carried out, an operation value is used for preliminary timing synchronization. As the method and the device are in view of at least one time domain symbol with a predetermined three-section structure, timing synchronization is carried out by using the delay relationship matching and / or the predetermined mathematical operation based on the three-section relationship between multiple time domain signals, the performance can be enhanced maximally, the timing synchronization algorithm is universal, and the complexity is low.

Description

technical field [0001] The invention belongs to the field of broadcast communication, and in particular relates to a method for receiving a preamble symbol and a corresponding device. Background technique [0002] At present, the method for realizing time synchronization between the transmitting end and the receiving end in the OFDM system is basically based on preamble symbols. The preamble symbol is a symbol sequence known to both the sender and the receiver of the OFDM system. The preamble symbol marks the beginning of the physical frame (named P1 symbol), and only one P1 symbol or multiple P1 symbols appear consecutively in each physical frame. Symbols, the uses of P1 symbols include: [0003] 1) Make the receiving end detect quickly to determine whether the signal transmitted in the channel is the desired signal; [0004] 2) Provide basic transmission parameters (such as FFT points, frame type information, etc.), so that the receiving end can perform subsequent receiv...

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is that, the receiving method and device of preamble symbols in the prior art, for the receiving method of preamble symbols in the prior art, considering the transmitted multiple preamble symbols to transmit the required signaling to meet the needs of the system, thus receiving The receiving method of the terminal is not very versatile, and the algorithm complexity is often high in the timing synchronization process, and the transmission performance of the system is low

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