Optimal Spatial-Domain Design for Spatial Modulation Capacity Maximization

Chang Liu, Meng Ma, Yuli Yang, Bingli Jiao

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


As a promising technique in multi-antenna systems, spatial modulation (SM) introduces the spatial domain into its constellation by mapping more information with antenna selection, in addition to the signal domain. To further improve the capacity performance of SM, an iterative algorithm for the spatial-domain design is proposed in this letter, where the optimal probability of activating each transmit antenna is obtained to maximize the instantaneous capacity of SM. By comparing the metrics of outage and ergodic capacity with the conventional SM, illustrative numerical results not only demonstrate the throughput achieved in the proposed scheme, but also substantiate the domination of the proposed scheme over the conventional SM.

Original languageEnglish
Article number7447695
Pages (from-to)1092-1095
Number of pages4
JournalIEEE Communications Letters
Issue number6
StatePublished - Jun 2016
Externally publishedYes


  • Spatial modulation
  • capacity maximization
  • spatial domain


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