Research Article | OPEN ACCESS
Novel Sub-carriers Iterative Restructuring Method in OFDM: Toward Extra Equalization Omitted
Zhao Wang Xing and Zhang Zhong Pei
National Key Libratory of Science and Technology on Communication, University of Electronics
Science and Technology of China, Chengdu, China
Research Journal of Applied Sciences, Engineering and Technology 2014 13:2729-2735
Received: September 14, 2013 | Accepted: October 01, 2013 | Published: April 05, 2014
Abstract
This study considered a receiver equalization problem in wireless communication area. Receiver equalizations in OFDM proceeding through sub-carriers variedness in frequency guarantee transmit system bit error rate thus are essential. E.g., Zero-Forcing (ZF) equalization, Minimal Mean Square Equalization (MMSE), which can also be considered as channel Estimation (EE) and detection schemes. However, some methods like adaptive equalizations must count priority transceiver information thus may be not practical although they raise performances for receiver. This study considers equalization and detection problems through a sub-carriers restructuring method to omit any complicated extra equalization in receiver except ZF equalization following the elemental LS channel estimation. Optimal constraints model is utilized which leads to an optimal sub-carriers derivation, moreover, we iteratively set up constraints model and give derivation, then under our new sub-carriers no extra equalization is needed. Simulations verify the novel method can approach MMSE equalization although it may bring transceiver complexity.
Keywords:
Channel estimation, extra equalization, OFDM, optimal sub-carriers, restructuring,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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