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Iterative Receiver with Low Complexity for Downlink Multicarrier Communications over Rapidly Time-Varying Channels
Joint Authors
Kabaoglu, Nihat
Erdogan, Eylem
Aydin, Erdogan
Source
Wireless Communications and Mobile Computing
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-01-31
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Information Technology and Computer Science
Abstract EN
This study proposes an iterative, joint channel estimation, equalization, and data detection method in the presence of high mobility for a multicarrier downlink system that communicates over rapidly time-varying channels.
The proposed method uses a basis expansion method (BEM) which has low computational complexity and helps to reduce the number of coefficients needed to represent a time-varying channel and therefore is extremely easy to implement practically.
Unlike the current literature, which is almost entirely focused on the uplink communication systems due to their computational costs, this method prioritizes the goal of being feasible in a downlink system with a reasonable performance.
The proposed suboptimal algorithm is based on the space-alternating generalized expectation-maximization (SAGE) algorithm and the time-varying channel is represented by orthogonal basis functions obtained by means of discrete Walsh-Hadamard transform (DWHT).
The resulting receiver iterates between maximum a posteriori (MAP) based channel estimation in the subspace spanned by the orthogonal basis functions and successive interference cancellation.
Numerical examples show that the proposed algorithm has a satisfactory symbol error rate with low computational complexity and also has a reasonable peak-to-average power ratio (PAPR) reduction effect.
American Psychological Association (APA)
Kabaoglu, Nihat& Erdogan, Eylem& Aydin, Erdogan. 2018. Iterative Receiver with Low Complexity for Downlink Multicarrier Communications over Rapidly Time-Varying Channels. Wireless Communications and Mobile Computing،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1216218
Modern Language Association (MLA)
Kabaoglu, Nihat…[et al.]. Iterative Receiver with Low Complexity for Downlink Multicarrier Communications over Rapidly Time-Varying Channels. Wireless Communications and Mobile Computing No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1216218
American Medical Association (AMA)
Kabaoglu, Nihat& Erdogan, Eylem& Aydin, Erdogan. Iterative Receiver with Low Complexity for Downlink Multicarrier Communications over Rapidly Time-Varying Channels. Wireless Communications and Mobile Computing. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1216218
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1216218