We experimentally investigate the channel estimation and compensation in a chromatic dispersion (CD) limited 20Gbit/s optical fast orthogonal frequency division multiplexing (F-OFDM) system with up to 840km transmission. It is shown that symmetric extension based guard interval (GI) is required to enable CD compensation using one-tap equalizers. As few as one optical F-OFDM symbol with four and six pilot tones per symbol can achieve near-optimal channel estimation and compensation performance for 600km and 840km respectively.
|Title of host publication||8th International Symposium on Communication Systems, Networks Digital Signal Processing (CSNDSP)|
|Number of pages||4|
|Publication status||Published - 18 Jul 2012|
|Event||8th international symposium on communication systems, networks and digital signal processing - Poznań, Poland|
Duration: 18 Jul 2012 → 20 Jul 2012
|Conference||8th international symposium on communication systems, networks and digital signal processing|
|Period||18/07/12 → 20/07/12|