公开(公告)号：US09867166B2

公开(公告)日：2018-01-09

申请号：US14478366

申请日：2014-09-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung-Hyun Hwang ,  Chang-Joo Kim ,  Myung-Sun Song ,  Jung-Sun Um

IPC: H04B3/10 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04W72/0406 ,  H04L5/0007 ,  H04L5/0048

Abstract: Provided is a method of generating a pilot pattern capable of perform adaptive channel estimation, and a method and apparatus of a base station and a method and apparatus of a terminal using the pilot pattern.The pilot pattern selects pilot symbol positions based on distances from pilots of previous orthogonal frequency division multiple access (OFDMA) symbols to a subcarrier position of a current OFDMA symbol in the frequency domain and the time domain, so that a low pilot density is maintained so as to effectively transmit data, and stable channel estimation performance can be obtained even in a bad channel environment.In addition, the minimum burst allocation size is determined according to the channel environment between the base station and the terminal, guaranteeing channel estimation performance suitable for the channel environment, and improving granularity, channel estimation latency, and channel estimation memory size.

公开(公告)号：US09137053B2

公开(公告)日：2015-09-15

申请号：US14311579

申请日：2014-06-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung-Hyun Hwang ,  Jung-Sun Um ,  Sung-Jin Yoo ,  Byung-Jang Jeong ,  Myung-Sun Song

IPC: H04K1/10 ,  H04L27/28 ,  H04L25/02

CPC classification number: H04L25/0204 ,  H04L25/022 ,  H04L25/0232

Abstract: Disclosed herein are an apparatus and a method of estimating a channel in consideration of a residual synchronization offset. The apparatus of estimating a channel in consideration of a residual synchronization offset includes: a channel estimating unit estimating the channel using pilots scattered over a plurality of OFDM symbols and calculating a first channel estimated value as the estimation result, in the case in which an OFDM symbol estimating the channel and an OFDM symbol compensating for the channel are different from each other; and a phase reflecting unit calculating a phase generated by the residual synchronization offset in proportion to a difference between a channel estimation time and a channel compensation time, reflecting the calculated phase in the first channel estimated value, and calculating a second channel estimated value as the reflection result.

Abstract translation: 本文公开了考虑到残余同步偏移来估计信道的装置和方法。 考虑到残余同步偏移来估计信道的装置包括：信道估计单元，其使用在多个OFDM符号上分散的导频并计算第一信道估计值作为估计结果来估计信道，其中OFDM 估计信道的符号和补偿信道的OFDM符号彼此不同; 以及相位反映部，其将所述残差同步偏移产生的相位与信道估计时间和信道补偿时间之间的差成比例地计算，反映所述计算出的所述第一信道估计值的相位，并且计算第二信道估计值为 反思结果。