| Title: |
Comparative Analysis of CMA and MMSE in MIMO-OFDM System |
| Authors: |
Adeyemo, Zachaeus K.; Fawole, Ayobami O.; Olukunle, Akande A. |
| Source: |
Innovative Systems Design and Engineering; Vol 7, No 5 (2016); 35-42 |
| Publisher Information: |
The International Institute for Science, Technology and Education (IISTE) |
| Publication Year: |
2016 |
| Collection: |
International Institute for Science, Technology and Education (IISTE): E-Journals |
| Description: |
Channel estimation is one of the techniques used to achieve high data rates and low bit error rates in wireless communications. In wireless communication system, where Multiple Input Multiple Output - Orthogonal Frequency Division Multiplexing (MIMO-OFDM) exists, the effect of channel causes the received signal to be distorted which necessitates the receiver to have an insight of the channel known as the channel estimation. However, most of the existing techniques such as Least Square Error (LSE), Minimum Mean Square Error (MMSE) and Best Linear Unbiased Estimation Algorithm (BLUE) employ pilot symbols. High errors are observed in addition to computational complexity and in the platform other than MIMO-OFDM. In this paper, performances of Constant Modulus Algorithm (CMA) and MMSE are evaluated, and compared with each other in the 3x3 MIMO-OFDM systems. The system model for 3x3 MIMO-OFDM system incorporating each of CMA and MMSE consists of a transmitter, frequency selective channel and the receiver. 1000 bits are generated randomly and served as input signal. Three antennas configurations at the input of the frequency selective channel radiate the signal. The three antennas at the output of the channel receive the radiated power, processed by appropriate signal processing techniques. Each of MMSE and CMA techniques is performed at SNR of 5, 10 and 15dB. The system model is simulated using MATLAB 7.2 application package and evaluated using Mean Square Error (MSE) and convergence value. The results obtained show that CMA gives lower error than the MMSE and converges faster. Therefore, the study has shown the significant reduction in computational complexity and can be used by wireless design. Keywords: Constant Modulus Algorithm, Orthogonality, Channel Estimation, Multiple Antenna, Cyclic Prefix. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://www.iiste.org/Journals/index.php/ISDE/article/view/30484/31328; https://www.iiste.org/Journals/index.php/ISDE/article/view/30484 |
| Availability: |
https://www.iiste.org/Journals/index.php/ISDE/article/view/30484 |
| Rights: |
Submission of an article implies that the work described has not been published previously (except in the form of an abstract or as part of a published lecture or academic thesis), that it is not under consideration for publication elsewhere, that its publication is approved by all authors and tacitly or explicitly by the responsible authorities where the work was carried out, and that, if accepted, will not be published elsewhere in the same form, in English or in any other language, without the written consent of the Publisher. The Editors reserve the right to edit or otherwise alter all contributions, but authors will receive proofs for approval before publication. Copyrights for articles published are retained by the authors, with first publication rights granted to the journal. The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author. |
| Accession Number: |
edsbas.A9EA2DE7 |
| Database: |
BASE |