Multi-Stream Transmission for Highly Frequency Selective Channels in MIMO-FBMC/OQAM Systems

This paper addresses the joint design of MIMO precoding and decoding matrices for filter bank multicarrier (FBMC) systems based on OQAM, known as FBMC/OQAM. Existing solutions that support multi-stream transmission only give satisfactory performance in scenarios with high coherence bandwidth channel...

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Bibliographic Details
Published in:IEEE transactions on signal processing Vol. 62; no. 4; pp. 786 - 796
Main Authors: Caus, Marius, Perez-Neira, Ana I.
Format: Journal Article Publication
Language:English
Published: New York, NY IEEE 01.02.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Applied sciences
Channels
Coding, codes
Complexity theory
Computer simulation
Criteria
Design engineering
Detection, estimation, filtering, equalization, prediction
Enginyeria de la telecomunicació
Equalizers
Exact sciences and technology
FBMC based on OQAM
Information, signal and communications theory
Mathematical models
Mean square errors
MIMO
MIMO precoder/decoder design
MIMO systems
Modulation, demodulation
Multi-stream transmission
Multiplexing
OFDM
Optimization
Receivers
Signal and communications theory
Signal, noise
Sistemes MIMO
Symbols
Telecommunications and information theory
Transmitters
Vectors
Àrees temàtiques de la UPC
Performance evaluation
Bank system
FBMC based on OQAM
Parameter estimation
Quadrature amplitude modulation
OFDM
Data transmission
Iterative method
Equalizer
multi-stream transmission
Optimization
Mean square error
Frequency selection
Coding
Filter bank
Robustness
Pretreatment
Optical modulation
MIMO precoder/decoder design
Fading channels
MIMO system
Coding circuit
Multicarrier
Decoding
Optimal solution
Coherence
Multi-stream approach
Signal processing
ISSN:1053-587X, 1941-0476
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Summary:This paper addresses the joint design of MIMO precoding and decoding matrices for filter bank multicarrier (FBMC) systems based on OQAM, known as FBMC/OQAM. Existing solutions that support multi-stream transmission only give satisfactory performance in scenarios with high coherence bandwidth channels. To make progress towards the application of FBMC/OQAM to MIMO channels, we study the design of novel solutions that provide robustness against the channel frequency selectivity and support multi-stream transmission. To this end, two techniques have been devised under the criterion of minimizing the sum mean square error. The non-circular nature of the OQAM symbols has not been ignored, making evident the convenience of performing a widely linear processing. The first technique keeps the complexity at a reasonable level but in exchange the original problem is relaxed yielding a suboptimal solution. With the objective of performing closer to the optimum solution, the second option iteratively computes precoders and equalizers by resorting to an alternating optimization method, which is much more complex. We have demonstrated via simulations that the first technique nearly achieves the same results as the iterative design. Simulation results show that the proposed low-complexity solution outperforms existing MIMO-FBMC/OQAM schemes in terms of bit error rate. As for the comparison with OFDM, the numerical results highlight that FBMC/OQAM remains competitive, with and without perfect channel state information, while it provides spectral efficiency gains. Under highly frequency selective channels the proposed technique significantly outperforms OFDM.
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ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2013.2293973