Particle swarm optimization for pilot tones design in MIMO-OFDM systems

Creative Commons License

Seyman M. N., TAŞPINAR N.

EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1186/1687-6180-2011-10
  • Dergi Adı: EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: MIMO-OFDM, channel estimation, particle swarm optimization, CHANNEL ESTIMATION
  • Erciyes Üniversitesi Adresli: Evet

Özet

Channel estimation is an essential task in MIMO-OFDM systems for coherent demodulation and data detection. Also designing pilot tones that affect the channel estimation performance is an important issue for these systems. For this reason, in this article we propose particle swarm optimization (PSO) to optimize placement and power of the comb-type pilot tones that are used for least square (LS) channel estimation in MIMO-OFDM systems. To optimize the pilot tones, upper bound of MSE is used as the objective function of PSO. The effects of Doppler shifts on designing pilot tones are also investigated. According to the simulation results, PSO is an effective solution for designing pilot tones.