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Summary: Performance Evaluation of Multi-Layered Space Frequency Time Codes for
MIMO-OFDM Systems
Samir Al-Ghadhban
King Fahd University of Petroleum and Minerals
Electrical Engineering Department, Dhahran, Saudi Arabia
E-Mail: samir@kfupm.edu.sa
Abstract: In this paper, we study multi-layered concatenated
coding for MIMO-OFDM systems. The proposed system
combines spatial multiplexing with transmit diversity at each
layer. In addition, each layer concatenates a powerful class of
bandwidth efficient coding called IQ-TCM with STBC. This
allows the code to achieve full spatial and frequency diversity
for each layer at much lower complexity in terms of number of
states without any bandwidth expansion. This paper evaluates
the performance of serial and parallel interference nulling and
cancellation algorithms with several ordering criteria.
Furthermore, we demonstrate the advantage of multi-layered
approach compared to V-BLAST and we show that the multi-
layered system is much more power efficient over MIMO-
OFDM channels.
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