Research Article | OPEN ACCESS
Diversity Gain and Coding Performance of OST-CPM System in Spatially Correlated Channels
Wen-Li Shen and An-Ding Wang
Colleges of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou, China
Research Journal of Applied Sciences, Engineering and Technology 2013 9:2754-2759
Received: September 25, 2012 | Accepted: November 08, 2012 | Published: March 20, 2013
Abstract
The Chernoff bound on Pair-Wise Error Probability (PWEP) performance of orthogonal space-time coded CPM (OST-CPM) systems is investigated, for two transmit antennas, over spatially correlated channels. Approximate Chernoff bound for high Signal-to-Noise Ratio (SNR) is derived to evaluate the diversity gain and coding performance in correlated channels. The achievable diversity gain of this system decreases due to the signal correlation between the antennas. Simulation results show that the error performance over a correlated channel is degraded when the correlation coefficient increases. And the penalty on the code performance increases a lot in fully correlated channels. It can also be seen that the diversity gain decreases when the channel is fully correlated, which matches well with the theoretical analysis. The upper bounds can be looser when diversity order decreases.
Keywords:
Correlated channel, OST-CPM, pair-wise error probability,
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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