Power Allocation Optimization: Linear Precoding Adapted to NB-LDPC Coded MIMO Transmission

In multiple-input multiple-output (MIMO) transmission systems, the channel state information (CSI) at the transmitter can be used to add linear precoding to the transmitted signals in order to improve the performance and the reliability of the transmission system. This paper investigates how to prop...

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Veröffentlicht in:International journal of antennas and propagation Jg. 2015; H. 2015; S. 1 - 11
Hauptverfasser: Radoi, Emanuel, Rostaing, Philippe, Collin, Ludovic, Chehade, Tarek, Bazzi, Oussama
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Cairo, Egypt Hindawi Publishing Corporation 01.01.2015
John Wiley & Sons, Inc
Wiley
Schriftenreihe:Special issue on MIMO Antenna Design and Channel Modeling
Schlagworte:
Antennas
Channels
Computer simulation
Density
Engineering Sciences
Error correcting codes
Maximization
Niobium
Signal and Image processing
Symbols
EXIT charts
linear precoding
non-binary low density parity check (LDPC) codes
multiple-input multiple-output (MIMO) system
antenna allocation scheme
ISSN:1687-5869, 1687-5877
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Zusammenfassung:In multiple-input multiple-output (MIMO) transmission systems, the channel state information (CSI) at the transmitter can be used to add linear precoding to the transmitted signals in order to improve the performance and the reliability of the transmission system. This paper investigates how to properly join precoded closed-loop MIMO systems and nonbinary low density parity check (NB-LDPC). The q elements in the Galois field, GF(q), are directly mapped to q transmit symbol vectors. This allows NB-LDPC codes to perfectly fit with a MIMO precoding scheme, unlike binary LDPC codes. The new transmission model is detailed and studied for several linear precoders and various designed LDPC codes. We show that NB-LDPC codes are particularly well suited to be jointly used with precoding schemes based on the maximization of the minimum Euclidean distance (max-dmin) criterion. These results are theoretically supported by extrinsic information transfer (EXIT) analysis and are confirmed by numerical simulations.
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ISSN:1687-5869
1687-5877
DOI:10.1155/2015/975139