Tsukamoto, S., and M. Okada. “Single-RF Diversity Receiver for OFDM System Using ESPAR Antenna With Alternate Direction”. ECTI Transactions on Computer and Information Technology (ECTI-CIT), vol. 6, no. 1, Apr. 2016, pp. 89-93, doi:10.37936/ecti-cit.201261.54325.