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Data transmission method for filter bank multi-carrier system

A data transmission method and technology of multi-carrier system, applied in multi-carrier system, baseband system components, shaping network in transmitter/receiver, etc., can solve the problem of FBMC system pilot frequency imaginary part interference and other issues

Active Publication Date: 2014-06-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a data transmission method for a filter bank multi-carrier system, thereby solving the technical problem that the pilot frequency of the FBMC system is interfered by the imaginary part

Method used

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  • Data transmission method for filter bank multi-carrier system
  • Data transmission method for filter bank multi-carrier system

Examples

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Embodiment 1

[0016] Embodiments of the present invention include the step of calculating the imaginary part interference suffered by the pilot, and designing adjacent symbols S of the pilot 1 and S 2 , sending and receiving data step, channel estimation and equalization step, data recovery step, is characterized in that:

[0017] (1) Steps to calculate the imaginary part interference received by the pilot: two adjacent symbols with the same frequency as the pilot symbol are respectively denoted as S 1 and S 2 , the other m symbols around the pilot symbol are denoted as D=[d 1 , d 2 , d 3 ,... d m ] T , the interference coefficient of each data to the pilot symbol is known, denoted as A=[a 1 ,a 2 ,a 3 ,...,a m ], so the imaginary interference from the data symbol D to the pilot is I=AD.

[0018] (2) Design adjacent symbols S of the pilot 1 and S 2 Step: record the extra data to be sent as x, according to (where b 1 for S 1 Interference coefficient to pilot, b 2 for S 2 in...

Embodiment 2

[0028] Another embodiment of the present invention includes the step of calculating the imaginary part interference suffered by the pilot, and designing adjacent symbols S of the pilot 1 and S 2 Step, sending and receiving data step, channel estimation and equalization step, data restoration step, is characterized in that:

[0029] (1) Steps to calculate the imaginary part interference received by the pilot: two adjacent symbols at the same time as the pilot symbol are respectively denoted as S 1 and S 2 , the other m symbols around the pilot symbol are denoted as D=[d 1 , d 2 , d 3 ,... d m ] T , the interference coefficient of each data to the pilot symbol is known, denoted as A=[a 1 ,a 2 ,a 3 ,...,a m ], so the imaginary interference from the data symbol D to the pilot is I=AD.

[0030] (2) Design adjacent symbols S of the pilot 1 and S 2 Step: record the extra data to be sent as x, according to (where b 1 for S 1 Interference coefficient to pilot, b 2 for...

Embodiment 3

[0040] This specific embodiment is a FBMC system with 256 subcarriers, wherein the symbol mapping method adopts the BPSK mapping method, that is, bit 0 is mapped to symbol +1, bit 1 is mapped to symbol -1, and each carrier sends 20 symbols. The filter used is a Phydas filter.

[0041] (1) Calculating the imaginary part interference of the pilot: Assume that S1 and S2 need to cancel the imaginary part interference of the data in the surrounding 3×7 area on the pilot symbol, and remove 1 pilot symbol and S in the 3×7 area 1 , S 2 , a total of 18 data, recorded as D=[d 1 , d 2 , d 3 ,... d 18 ] T , the interference coefficient of each data to the pilot symbol is known, denoted as A=[a 1 ,a 2 ,a 3 ,...,a 18 ], so the imaginary interference from the data symbol D to the pilot is I=AD.

[0042] (2) Design adjacent symbols S of the pilot 1 and S 2 Step: Due to the adoption of BPSK mapping, assuming that the additional data to be sent is x=1, then

[0043] (3) Steps of ...

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Abstract

The invention discloses a data transmission method for a filter bank multi-carrier system and belongs to the field of filter bank multi-carrier communication. According to the data transmission method, imaginary-part interference suffered by a pilot carrier is counteracted through two adjacent symbols of the pilot carrier, extra data can be sent through coding, and the technical problem that pilot carrier symbols in the filter bank multi-carrier system can be subject to imaginary-part interference is solved. The data transmission method for the filter bank multi-carrier system comprises the steps of calculating the imaginary-part interference suffered by the pilot carrier and setting the two adjacent symbols, namely the symbol S1 and the symbol S2, of the pilot carrier, sending and receiving data, conducting channel estimation and equalization, and conducting data recovery. The data transmission method for the filter bank multi-carrier system has the advantage the energy used for counteracting the imaginary-part interference can be greatly reduced under the condition that the good channel estimation performance can be guaranteed.

Description

technical field [0001] The invention belongs to the field of multi-input multi-output multi-carrier communication, and more specifically relates to a data transmission method of a filter bank multi-carrier system. Background technique [0002] In recent years, research on Filter Bank Multi Carrier-Offset Quadrature Amplitude Modulation (FBMC-OQAM) technology has attracted great attention. Compared with the Orthogonal Frequency Division Multiplexing (OFDM) technology, the FBMC-OQAM technology has a higher spectrum utilization rate. However, the imaginary part interference in FBMC-OQAM is a huge challenge to the pilot scheme design. [0003] The current article of J-P.Javaudin (J-P.Javaudin, D.Lacroix, and A.Rouxel, "Pilot-aided channel estimation for OFDM / OQAM", in VTC'03Spring, vol.3, pp.1581-1585, April2003) proposed A single auxiliary pilot pilot design scheme is proposed, which mainly uses a single auxiliary pilot to offset the imaginary part interference of the pilot, ...

Claims

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Application Information

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IPC IPC(8): H04L27/34H04L25/02H04L25/03
Inventor 屈代明崔文佳江涛
Owner HUAZHONG UNIV OF SCI & TECH
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