Generating method and receiving method of leading symbols

A technology of a preamble symbol and a receiving method, which is applied in the field of a generation method and a receiving method of a preamble symbol and a corresponding device, can solve the problems of insufficient system transmission efficiency, not considering the signaling required for time domain symbol transmission, etc., so as to achieve a high transmission efficiency. Effect

Active Publication Date: 2016-10-05
SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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Problems solved by technology

[0009] The problem solved by the present invention is that the time-domain main signal of the preamble symbol in the prior art only uses different root values ​​of the constant-envelope zero-autocorrelation CAZAC sequence to transmit signaling in the frequency domain, resulting in insufficient system transmission efficiency, and does not It does not consider the number of time-domain symbols selected by the format control part PFC to transmit the required signaling to meet the needs of system transmission

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  • Generating method and receiving method of leading symbols
  • Generating method and receiving method of leading symbols
  • Generating method and receiving method of leading symbols

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Embodiment Construction

[0046] The inventors found that the time-domain main signal of the preamble symbol in the prior art only uses different root values ​​of the constant-envelope zero-autocorrelation CAZAC sequence to transmit signaling in the frequency domain, resulting in insufficient system transmission efficiency, and did not consider selecting The number of symbols in the time domain of the format control part PFC is used to transmit the required signaling to meet the needs of system transmission.

[0047] In view of the above problems, the inventor provided a generation method and receiving method of a preamble symbol as well as a generation device and a receiving device of a preamble symbol after research. Since the main sequence ZC in the frequency domain is based on the constant envelope zero autocorrelation sequence CAZAC according to the predetermined sequence Generated by a generation rule, the predetermined sequence generation rule includes: giving the constant envelope zero autocorre...

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Abstract

The invention provides a generating method and a receiving method of leading symbols, and a generating device and a receiving device of the leading symbols. Since a time domain symbol has a first kind of three-segment structure, or a second kind of three-segment structure, or the free combination of a plurality of the first kind of three-segment structures and a plurality of the second kind of three-segment structures which are arranged in a random order, so that coherent detection is realized, the problem of decreasing noncoherent detection performance is solved. In addition, a predetermined sequence generation rule of a frequency domain main sequence comprises: giving different root values to predetermined sequences; and/or giving the same root value to the predetermined sequences, and carrying out circulating shifting on the generated sequences. The obtained frequency domain main sequence is utilized to transmit signaling needed by the system, and the transmission efficiency is improved.

Description

[0001] This application is a divisional application of the original application, the application number of the original application is 201510052202.5, the application date is January 30, 2015, and the title of the invention is "Method for generating and receiving leading symbols". technical field [0002] The invention belongs to the technical field of transmission of broadcast communication systems, and in particular relates to a method for generating and receiving a preamble symbol and a corresponding device. Background technique [0003] 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L27/26
CPCH04J13/0059H04L27/2692
Inventor 张文军黄戈徐洪亮邢观斌郭旭峰
Owner SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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