کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
447602 1443164 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A low complexity DFT-matrix based pilot allocation algorithm for sparse channel estimation in OFDM systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
A low complexity DFT-matrix based pilot allocation algorithm for sparse channel estimation in OFDM systems
چکیده انگلیسی

The accuracy of channel estimation is very important for Orthogonal Frequency Division Multiplexing (OFDM) systems. In a high speed wideband wireless communication, the channel can be modeled as a sparse one. Therefore, the Compressed Sensing (CS) technique can be used for the estimation of the channel. In this paper, the problem of deterministic pilot allocation in OFDM systems is considered and a new criterion which is based on minimizing the summation of the correlations between the columns of the Discrete Fourier Transform (DFT) sub-matrix is proposed. It will be shown that the proposed criterion is a simple version of the well-known but complex criterion, Restricted Isometry Property (RIP). In addition, the pilot pattern design, using our proposed scheme, indicates better recovery performance than other proposed coherence based criteria in terms of the reconstruction mean square error (MSE) and successful channel recovery percentage. Simulation results confirm our analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: AEU - International Journal of Electronics and Communications - Volume 68, Issue 2, February 2014, Pages 85–89
نویسندگان
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