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Article Information:
Diversity Gain and Coding Performance of OST-CPM System in Spatially Correlated Channels
Wen-Li Shen and An-Ding Wang
Corresponding Author: Wen-Li Shen
Submitted: September 25, 2012
Accepted: November 08, 2012
Published: March 20, 2013 |
Abstract:
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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.
Key words: Correlated channel, OST-CPM, pair-wise error probability, , , ,
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Cite this Reference:
Wen-Li Shen and An-Ding Wang, . Diversity Gain and Coding Performance of OST-CPM System in Spatially Correlated Channels. Research Journal of Applied Sciences, Engineering and Technology, (09): 2754-2759.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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