Noncoherent OFDM Transmission via Off-the-Grid Joint Channel and Data Estimation

Noncoherent OFDM Transmission via Off-the-Grid Joint Channel and Data Estimation
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通过离网联合信道和数据估计的非相干 OFDM 传输

DOI:
10.1109/lwc.2022.3218187
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发表时间:
2023
影响因子:
6.3
通讯作者:
Bigdeli M
Bigdeli M
中科院分区:
计算机科学2区
文献类型:
--
作者:
Bigdeli M

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众所周知,导频辅助信道估计技术会浪费频谱带宽。本文研究了时变正交频分复用 (OFDM) 系统的离网盲估计器。在这方面,我们提出了一种基于原子范数最小化(ANM)的 OFDM 系统盲估计器。为此,在第一个传输块,使用提升的 ANM (LANM) 和简单的数据范数约束,我们同时估计信道和数据。对于后续块,我们使用惩罚 ANM (PANM) 来同时跟踪通道参数并检测传输信号。所提出的问题需要无限维搜索,因此是 NP 困难的。因此,我们提出两个半定规划(SDP)来实现它们。然后我们得出所提出的估计器的总计算复杂度。仿真结果表明所提出的估计器相对于最先进的估计器的优越性。
Pilot-aided channel estimation techniques are known to waste the spectral bandwidth. An off-the-grid blind estimator for time-variant orthogonal frequency division multiplexing (OFDM) systems is studied in this letter. In this regard, we propose a blind estimator based on atomic norm minimization (ANM) for OFDM systems. To do so, at the first transmission block, using a lifted ANM (LANM) and simple constraint onnorm of data, we simultaneously estimate the channel and data. For the subsequent blocks, we use a penalized ANM (PANM) to simultaneously track the channel’s parameters and detect transmit signals. The proposed problems require an infinite dimensional search, hence are NP-hard. Therefore, we propose two semidefinite programs (SDPs) to implement them. We then derive the total computational complexity of the proposed estimator. The simulation results show the superiority of the proposed estimator to the state-of-the-arts.
DOI: 10.1109/tvt.2005.844681
发表时间: 2005-05
影响因子: 6.8
作者:
R. Lin;A. Petropulu
通讯作者: R. Lin;A. Petropulu
DOI: 10.1109/lwc.2021.3117988
发表时间: 2021
影响因子: 6.3
作者:
Lixia Xiao;Guanghua Liu;P. Xiao;Tao Jiang
通讯作者: Tao Jiang