Low-Complexity Differential Spatial Modulation

Project Details


Spatial modulation (SM) is a multi-antenna technique which uses single transmitter antenna each time. SM can transmit additional data bits by selecting indexes of antennas. Because SM offers flexibility in reducing RF circuits and power consumption for next-generation wireless communications, it attracts much attention in recent years. Differential SM (DSM) which avoids the rate loss due to pilot is still a hot topic now. However, DSM is considered as a special case of differential space-time modulation which performs matrix multiplication at the transmitter and tests possible data space-time matrix one by one at the receiver. Therefore, the complexity is too high to be realized in the cases of a lot of transmitter antennas. In addition, the complex data space-time matrix of DSM is obtained by random searches, and there are unlimited possibilities of transmitted signal after differential encoding. This phenomenon increases the complexity as well.In this project, we aim at designing low-complexity DSM. One novelty of this project is DSM without matrix multiplication, which differentially encodes the antennas order and PSK signals separately. It decreases the complexity significantly and is still equivalent to the original DSM. The other novelty of this project is the complex data space-time matrix design, for which the transmitted signal is MPSK signal and the coding gain is maximized. We will derive and prove the proposed DSM and matrix.
Effective start/end date1/08/1831/07/19

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 12 - Responsible Consumption and Production
  • SDG 17 - Partnerships for the Goals


  • spatial modulation
  • differential encoding
  • differential detection


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