V-OFDM channel balancing and tracking method

A V-OFDM and channel equalization technology, applied in the field of V-OFDM-based channel equalization and tracking, can solve problems such as high complexity, limited research work, and reduced system transmission performance

Active Publication Date: 2017-06-30
ZHEJIANG UNIV
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Problems solved by technology

[0006] However, since it is a relatively new practice to apply V-OFDM to communication systems in high mobility environments, related research work is relatively limited, especially for th...

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  • V-OFDM channel balancing and tracking method

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Embodiment Construction

[0048] The present invention will be described in further detail below in conjunction with specific embodiments.

[0049] At the sending end, firstly determine the method of generating V-OFDM two-dimensional data block and inserting pilot into it, which specifically includes the following sub-steps:

[0050] Determine the V-OFDM two-dimensional data block size N V =512=P×M, P=64, M=8, the number of V-OFDM data block rows is 64, the number of V-OFDM data block columns is 8, and the number of data constellation points carried by each V-OFDM two-dimensional data block 496, N data =(P-2)×M;

[0051] For the 496 data constellation point sequences to be sent D=[d 0 , d 2 ,...,d 495 ], get the pilot vector determined by the user [P 0 ,P 2 ,...,P 7 ], arrange D into the following matrix form with P rows and M columns:

[0052]

[0053] This matrix S is called a V-OFDM two-dimensional data block, wherein the first row of the matrix is ​​all 0, and the Pth row is a pilot vec...

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Abstract

The invention discloses a V-OFDM channel balancing and tracking method. The method comprises the following steps: for a physical layer frame, firstly estimating a channel response initial value H by using a first paragraph of preamble training words; for a first V-OFDM symbol, estimating a pilot frequency value P on a pilot frequency position after a pilot frequency part in the received V-OFDM data symbol is converted onto the frequency domain, balancing the P by using the H, comparing the P with a known pilot frequency sequence Pknown to obtain a compensation value, compensating the channel H to obtain a compensated channel estimation value (the formula is as shown in specification), balancing a data part in the V-OFDM data symbol by using the H, and using the same as a subsequent V-OFDM symbol channel response initial value; and for a second paragraph of preamble training words, estimating a channel response value H2, compensating the channel response value by using the H2 to obtain a compensated channel estimation value (the formula is as shown in specification), and using the compensated channel estimation value as the subsequent V-OFDM symbol channel response initial value. By adoption of the V-OFDM channel balancing and tracking method disclosed by the invention, the channel response estimation value can be continuously updated, so that the balancing operation is faster and more accurate in the case of fast channel change.

Description

technical field [0001] The present invention relates to a vector positive frequency division multiplexing (Vector Otrhogonal Frequency Division Multiplexing, V-OFDM) system, in particular to a channel equalization and tracking method based on V-OFDM. Background technique [0002] Wireless communication uses electromagnetic waves to transmit information in free space, no longer subject to various restrictions, and can realize communication in complex environments and farther distances. At present, in the field of information communication, wireless communication develops the fastest and has the widest application, which has greatly changed human society. [0003] The research of next-generation wireless communication technology has become the focus of researchers, and the provision of stable and reliable communication services under the scenario of relative movement between the sending end and the receiving end at a relatively high speed (high mobility scene) is the next gene...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L27/34H04L25/03
CPCH04L25/03082H04L27/2678H04L27/2692H04L27/2695H04L27/3411
Inventor 张朝阳彭朱炜朱致焕
Owner ZHEJIANG UNIV
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