公开(公告)号：US20150229493A1

公开(公告)日：2015-08-13

申请号：US14519660

申请日：2014-10-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jungwon LEE ,  Yingqun YU ,  Sungsoo KIM ,  CheolHee LEE

IPC: H04L25/02 ,  H04L5/00

CPC classification number: H04L25/022 ,  H04L5/0023 ,  H04L5/0051 ,  H04L25/0234 ,  H04L25/0242 ,  H04L25/0256

Abstract: Methods, apparatuses, and systems for improved channel estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system are discussed. In one example discussed herein, joint two-dimensional Minimum Mean-Square Error (2D-MMSE) channel estimation is performed on any Resource Element (REs) containing a reference signal in a Resource Block (RB), one-dimensional Minimum Mean-Square Error (1D-MMSE) channel estimation is performed in the frequency domain on each OFDM symbol in the RB, and then channel estimation is performed in the time domain on each frequency sub-carrier in the RB. In another example discussed herein, Power Delay Profiles (PDPs) and/or frequency correlations are calculated using minimax optimization and then stored in a Look-Up Table (LUT) indexed by estimated Signal to Noise Ratio (SNR) and the estimated maximum delay spread. A portable device could use such an LUT in MMSE calculations.

Abstract translation: 讨论了正交频分复用（OFDM）系统中用于改进信道估计的方法，装置和系统。 在本文中讨论的一个示例中，对包含资源块（RB）中的参考信号的任何资源元素（RE）执行联合二维最小均方误差（2D-MMSE）信道估计，一维最小均方 在RB中的每个OFDM符号的频域中执行误差（1D-MMSE）信道估计，然后在RB中的每个频率子载波上的时域中执行信道估计。 在本文讨论的另一示例中，使用最小化优化来计算功率延迟分布（PDP）和/或频率相关，然后存储在由估计的信噪比（SNR）和估计的最大延迟扩展索引的查找表（LUT）中 。 便携式设备可以在MMSE计算中使用这样的LUT。