Name
Abstract | ||
|---|---|---|
Modern communications systems use efficient encoding schemes, multiple-input multiple-output (MIMO) and high-order QAM constellations for maximizing spectral efficiency. However, as the dimensions of the system grow, the design of efficient and low-complexity MIMO receivers possesses technical challenges. Symbol detection can no longer rely on conventional approaches for posterior probability computation due to complexity. Marginalization of this posterior to obtain per-antenna soft-bit probabilities to be fed to a channel decoder is computationally challenging when realistic signaling is used. In this work, we propose to use Expectation Propagation (EP) algorithm to provide an accurate low-complexity Gaussian approximation to the posterior, easily solving the posterior marginalization problem. EP soft-bit probabilities are used in an LDPC-coded MIMO system, achieving outstanding performance improvement compared to similar approaches in the literature for low-complexity LDPC MIMO decoding. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/ISIT.2014.6875183 | Information Theory |
Keywords | Field | DocType |
Gaussian channels,MIMO communication,approximation theory,channel coding,communication complexity,error statistics,expectation-maximisation algorithm,parity check codes,quadrature amplitude modulation,radio receivers,spectral analysis,telecommunication signalling,EP soft bit probability,EP-based soft decision,Gaussian approximation,LDPC coded MIMO system,MIMO receiver,QAM constellation,channel decoder,complexity,encoding scheme,expectation-propagation algorithm,modern communication system,multiple input multiple output,per-antenna soft bit probability,posterior marginalization problem,posterior probability computation,signaling,spectral efficiency maximization,symbol detection,Expectation Propagation,LDPC,Low Complexity receiver,MIMO communication systems | Mimo systems,Multi-user MIMO,Low-density parity-check code,Computer science,Theoretical computer science | Conference |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Javier Cespedes | 1 | 3 | 0.74 |
| Pablo M. Olmos | 2 | 39 | 3.24 |
| Matilde Sánchez Fernández | 3 | 83 | 12.25 |
| Fernando Pérez-Cruz | 4 | 0 | 0.34 |
| Sanchez-Fernandez, M. | 5 | 1 | 1.37 |
| Perez-Cruz, F. | 6 | 74 | 5.00 |