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1. (WO2018141130) SUB-CARRIER ESTIMATION METHOD AND DEVICE IN MULTI-CARRIER COMMUNICATION SYSTEM

Pub. No.:    WO/2018/141130    International Application No.:    PCT/CN2017/078536
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Thu Mar 30 01:59:59 CEST 2017
IPC: H04L 27/26
H04L 25/03
Applicants: SHANGHAI EASTSOFT MICROELECTRONICS CO., LTD.
上海东软载波微电子有限公司
Inventors: PAN, Song
潘松
SHEN, Liwei
沈力为
CHEN, Guangsheng
陈光胜
Title: SUB-CARRIER ESTIMATION METHOD AND DEVICE IN MULTI-CARRIER COMMUNICATION SYSTEM
Abstract:
Provided are a sub-carrier estimation method and device in a multi-carrier communication system. The method comprises: receiving a data frame sent by a sending end, and extracting a training sequence from the data frame; respectively performing fast Fourier transformation operation on the training sequence and a preset reference sequence to obtain frequency domain data of the training sequence and the frequency domain data of the reference sequence, and conjugately multiplying the frequency domain data of the training sequence with the frequency domain data of the reference sequence; extracting a real part of the conjugately multiplication result; averaging all numerical values in each column in an M*N array to obtain a one-row and N-column output array; and estimating whether valid data is transmitted by N sub-carriers corresponding to the one-row and N-column output array according to the value of each column in the one-row and N-column output array. By use of the scheme disclosed by the invention, the accuracy of the sub-carrier estimation can be improved while the sub-carrier estimation with low complexity is realized.