[1]张建康,赵悠悠,尚应博,等.基于反馈迭代算法的航空通信系统信道估计算法研究[J].郑州大学学报(工学版),2020,41(02):1-6.[doi:10.13705/j.issn.1671-6833.2019.03.004]
　ZHANG Jiankang,ZHAO Youyou,SHANG Yingbo,et al.Feedback-Iterative Channel Estimation Algorithm for Aeronautical Communication System[J].Journal of Zhengzhou University (Engineering Science),2020,41(02):1-6.[doi:10.13705/j.issn.1671-6833.2019.03.004]
点击复制

基于反馈迭代算法的航空通信系统信道估计算法研究()
分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41卷
期数:
2020年02期
页码:
1-6
栏目:
出版日期:
2020-05-31

文章信息/Info

Title:
Feedback-Iterative Channel Estimation Algorithm for Aeronautical Communication System
作者:
张建康; 赵悠悠; 尚应博; 穆晓敏
郑州大学信息工程学院
Author(s):
ZHANG Jiankang;  ZHAO Youyou;  SHANG Yingbo;  MU Xiaomin
School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China
关键词:
航空通信; 导频; OFDM; 信道估计; 反馈迭代
Keywords:
aeronautic communication;  pilot;  OFDM;  channel estimation;  feedback iterative
DOI:
10.13705/j.issn.1671-6833.2019.03.004
文献标志码:
A
摘要:
航空通信系统的时变性和大时延，导致传统信道估计算法存在信道参数估计不精确问题。 为解 决此问题，在建立飞机巡航阶段两径莱斯信道模型的基础上，提出一种反馈迭代信道估计算法。 该算法 核心思想为：首先利用少量原始导频对信道进行粗略时域最小二乘（ least-square,LS）估计，并检测传输 信号；之后将检测信号经调制和卷积编码反馈至信道估计器，并作为导频再次进行信道估计；最后将以 上过程经过两次迭代得到最终结果。 仿真结果表明，提出的算法相比无反馈的LS 算法，在信噪比小于20dB 情况下，可获得约2dB 的均方误差增益，从而验证了此迭代估计算法可以起到提高航空信道估计 精确度的效果。
Abstract:
The existing channel estimation algorithms have witnessed the disadvantages of high estimation error due to the fast time-varying channel and large propagation delay in the aeronautical communication system. This paper proposed an feedback iterative channel estimation algorithm based on the two-path Rice channel model for the en-route scenario. The proposed algorithm only used a small pilot overhead for rough least square (LS) channel estimation and signal detection, after being modulated and encoded, the obtained signals were fed back to the channel estimator used as pilot symbols again. Finally, the proposed scheme was capable of converging to a stable performance with two iterations. The simulation results demonstrate that the proposed channel estimation scheme was capable of achieving about 2 dB mean square error when the signal-to-noise ratio (SNR) was less than 20 dB, which verified that this algorithm could improve the accuracy of the aeronautical channel estimation.

参考文献/References:

[1] BILZHAUSE A, BELGACEM B, MOSTAFA M, et al. Datalink security in the L-band digital aeronautical communications system (LDACS) for air traffic management[J]. IEEE aerospace & electronic systems magazine, 2017, 32(11):22-33.

[2] ZHANG J K, CHEN S, MAUNDER R G, et al. Adaptive coding and modulation for large-scale antenna array based aeronautical communications in the presence of co-channel interference[J]. IEEE transactions on wireless communications, 2018, 17(2):1343-1357.
[3] ZHANG J K, CHEN S, MAUNDER R G, et al. Regularized zero-forcing precoding aided adaptive coding and modulation for large-scale antenna array based air-to-air communications[J]. IEEE journal on selected areas in communications,2018,36(9):2087-2103.
[4] 陈恩庆,肖素珍.基于因子图的MIMO-OFDM时变信道估计[J].郑州大学学报(工学版),2016,37(1):87-91.
[5] DU Z, SONG X G, CHENG J L, et al. Maximum likelihood based channel estimation for macrocellular OFDM uplinks in dispersive time-varying channels[J]. IEEE transactions on wireless communications, 2011, 10(1):176-187.
[6] 张建康,穆晓敏,陈恩庆,等. OFDM系统基于导频的信道估计算法分析[J]. 通信技术, 2009, 42(8):91-94.
[7] 赵俊义. MIMO-OFDM无线通信系统信道估计算法研究[D]. 哈尔滨：哈尔滨工业大学, 2009.
[8] 穆晓敏,刘越,李双志,等.基于张量分解的MIMO多中继系统半盲信道估计方法[J].郑州大学学报(工学版)，2016,37(6):83-86.
[9] EDFORS O, SANDELL M, VAN DE BEEK J J, et al. OFDM channel estimation by singular value decomposition[J]. IEEE transactions on commu-nications, 1998, 46(7):931-939.
[10] 王刚,李鸿林.一种基于叠加导频的OFDM系统迭代信道估计算法[J].哈尔滨商业大学学报(自然科学版), 2012, 28(6):686-688.
[11] ZHANG J, MU X, CHEN E, et al. Decision-directed channel estimation based on iterative linear minimum mean square error for orthogonal frequency division multiplexing systems[J]. IET communications, 2009, 3(7):1136-1143.
[12] HAAS E. Aeronautical channel modeling [J]. IEEE transactions on vehicular technology, 2002, 51(2):254-264.
[13] HOEHER P. A statistical discrete-time model for the wssus multipath channel [J]. IEEE transactions on vehicular technology, 1992, 41(4):461-468.
[14] MORELLI M, MENGALI U. A comparison of pilot-aided channel estimation methods for OFDM systems[J]. IEEE transactions on signal processing, 2001, 49(12):3065-3073.
[15] LI Y. Simplified channel estimation for OFDM systems with multiple transmit antennas[J].IEEE transactions on wireless communications, 2002, 1(1):67-75.

更新日期/Last Update: 2020-05-30