Energy Efficient Precoding for MIMO Cyclic Prefixed Single Carrier Communications

Shrestha, Jeevan;Stupia, Ivan;Vandendorpe, Luc
(2015) 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015 — Location: Stockholm (29.June.2015)

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Authors
  • Shrestha, JeevanUCLouvain
    Author
  • Stupia, Ivanorcid-logoUCLouvain
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  • Vandendorpe, LucUCLouvain
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Abstract
This paper addresses the design of energy efficient precoding/decoding strategies for multiple-input multiple-output cyclic prefixed single carrier (MIMO CP-SC) systems with frequency-domain equalization. We opt for eigenbeamforming in the frequency domain for spatial precoding and decoding. We show that eigenbeamforming leads to a simple yet effective maximization of the energy efficiency (EE) of the MIMO CP-SC link. Moreover, the associated power allocation relies on the combination of waterfilling among the spatial streams and a proper distribution of the per-stream allocated power among subcarriers. Numerical results show that, if we account for the efficiency of the high power amplifier (HPA) associated with the peak-to-average power ratio (PAPR), CP-SC can be more energy efficient than orthogonal frequency division multiplexing (OFDM) for moderate to high signal-to-noise (SNR) values.
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Shrestha, J., Stupia, I., & Vandendorpe, L. (2015). Energy Efficient Precoding for MIMO Cyclic Prefixed Single Carrier Communications. 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015. Published. 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015, Stockholm. https://hdl.handle.net/2078.5/229150