Abstract
We present a novel technique for the detection of spatially multiplexed transmitted symbols in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. The method, termed Selective Detection, observes errors caused by a simple zero-forcing (ZF) on different OFDM sub-carriers, and selectively performs list sphere detection (LSD) on sub-carriers with larger errors. Compared with the full-complexity LSD, the proposed algorithms could significantly reduce the receiver complexity at a small signal-to-noise ratio (SNR) loss. For example, simulation results for a coded MIMO-OFDM system using four transmitters and four receivers with 16 quadrature amplitude modulation (16-QAM) and low density parity check (LDPC) coding show that more than 90% of SNR gain that can be achieved by the use of LSD over ZF can be achieved if only 20% of sub-carriers are intelligently selected for LSD.
Original language | English |
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Title of host publication | 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC |
Place of Publication | Piscataway, NJ |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 822-826 |
Number of pages | 5 |
ISBN (Electronic) | 9781424416448, 1424416442 |
ISBN (Print) | 9781424416455 |
DOIs | |
Publication status | Published - 2008 |
Externally published | Yes |
Event | 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC - Marina Bay, Singapore Duration: 11 May 2008 → 14 May 2008 |
Other
Other | 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC |
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Country | Singapore |
City | Marina Bay |
Period | 11/05/08 → 14/05/08 |