OFDM training sequence generation method and OFDM synchronization method

A training sequence and subsequence technology, applied in the field of OFDM synchronization, can solve the problems of small estimation range of the integer part of frequency offset, poor anti-multipath interference capability, and high computational complexity, and achieve accurate estimation and anti-multipath interference capability. Strong, wide-ranging effects

A training sequence and subsequence technology, applied in the field of OFDM synchronization, can solve the problems of small estimation range of the integer part of frequency offset, poor anti-multipath interference capability, and high computational complexity, and achieve accurate estimation and anti-multipath interference capability. Strong, wide-ranging effects

CN104935545AInactive Publication Date: 2015-09-23UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • OFDM training sequence generation method and OFDM synchronization method
  • OFDM training sequence generation method and OFDM synchronization method
  • OFDM training sequence generation method and OFDM synchronization method

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Embodiment Construction

[0017] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0018] refer to figure 1 , figure 1 It is a flowchart of an embodiment of the method 100 for generating OFDM training sequences of the present invention. figure 1 The illustrated method 100 may include steps 101 to 103 as follows.

[0019] In step 101, a first subsequence is generated with a length half of the number of OFDM subcarriers.

[0020] If the total number of subcarriers of OFDM is N, the length of the first subsequence may be N / 2.

[0021] In one embodiment of the present invention, refer to figure 2 , step 101 may include the following sub-steps 201 to 202.

[0022] In sub-step 201, a constant envelope...

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Abstract

The invention discloses an OFDM training sequence generation method and an OFDM synchronization method; the OFDM training sequence generation method comprises the following steps: generating a first subsequence through using a half of an OFDM subcarrier number as a length; calculating conjugate of the first subsequence so as to obtain a second subsequence; connecting the first and second subsequences in sequence so as to generate the training sequence.

Description

technical field [0001] The invention relates to the technical field of OFDM, in particular to a method for generating OFDM training sequences and an OFDM synchronization method. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is a special multi-carrier transmission technology, which is widely used in wireless communication systems such as digital audio broadcasting and wireless local area network. [0003] OFDM communication technology is very sensitive to synchronization errors. When carrier frequency deviation and timing errors occur, it will cause Inter-Carrier-Interference (ICI) and Inter-Symbol-Interference (ISI), seriously affecting the overall performance. [0004] In order to eliminate carrier frequency offset and timing error, the prior art usually adds a training sequence in front of each frame of OFDM transmission data. Since the training sequence is specially designed in terms of structure and content, it is beneficial for OFDM r...

Claims

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Application Information

Patent Timeline
23 Sep 2015
Publication
CN104935545A
IPC
H04L27/26
CPC
H04L27/2656; H04L27/2659; H04L27/266
Inventors
邵怀宗; 章文珠