engleski

Low PAPR Spatial Modulation for SC-FDMA

Although spatial modulation (SM) presents an attractive multiple-input multiple-output (MIMO) technique, it increases peak-to-average power ratio (PAPR) on all transmit antennas when applied directly to single-carrier frequency division multiple access (SC-FDMA). Therefore, we propose an SM modification, named low PAPR SM (LPSM), to preserve the low PAPR level of SC-FDMA and to achieve the benefits of SM. In addition, as optimal maximum likelihood detection (MLD) receiver has very high computational complexity when applied to SC- FDMA system, we observed suboptimal receivers for SC-FDMA with LPSM. Besides low complexity linear receivers, we proposed and analyzed two receivers: near-MLD and improved minimum mean- square error (iMMSE) receiver. Near-MLD receiver achieves performance very near to MLD with significantly lower complexity, whereas iMMSE presents a tradeoff between MLD and linear receivers in terms of performance and complexity.

spatial modulation ; SC-FDMA ; MIMO ; PAPR ; MLD

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