Noise Power Estimation in SC-FDMA Systems

被引：5
|
作者：
Liu, Yinsheng [1 ,2 ]
Li, Geoffrey Ye [3 ]
Tan, Zhenhui [2 ]
Hu, Hongjie [4 ]
机构：
[1] Beijing Jiaotong Univ, Sch Comp Sci & Informat Technol, Beijing 100044, Peoples R China
[2] Beijing Jiaotong Univ, State Key Lab Rail Traff Control & Safety, Beijing 100044, Peoples R China
[3] Georgia Inst Technol, Sch ECE, ITP Lab, Atlanta, GA 30313 USA
[4] Huawei Technol Co Ltd, Shenzhen 515129, Peoples R China
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2015年 / 4卷 / 02期
基金：
美国国家科学基金会;
关键词：
SNR; noise power estimation; SC-FDMA; ML; MVU; FPI; SNR ESTIMATION ALGORITHM; VARIANCE-ESTIMATION; OFDM SYSTEMS; CHANNEL;
D O I：
10.1109/LWC.2015.2399393
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This article addresses the problem of noise power estimation for single-carrier frequency-division-multiple-access (SC-FDMA), which is used in long-term evolution (LTE). If channels are known, signal-to-noise ratio (SNR) can be derived from the noise power. A maximum-likelihood (ML) estimator is first derived to obtain a temporal noise power and then a minimum-variance unbiased (MVU) estimator is adopted to obtain an average noise power over the time-frequency plane. Since there is no analytical solution for the MVU estimator, an iterative approach based on fixed-point iteration (FPI) is employed to solve MVU estimation.
引用
收藏
页码：217 / 220
页数：4
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