TY - JOUR
T1 - PAM-DMT for intensity-modulated and direct-detection optical communication systems
AU - Lee, Sian C.J.
AU - Randel, Sebastian
AU - Breyer, Florian
AU - Koonen, A.M.J.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - A novel concept of pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) is presented. It is shown that by pulse amplitude modulation of the subcarriers used, the resulting PAM-DMT time signal can be clipped asymmetrically to achieve a unipolar signal for transmission. The distortion resulting from this asymmetric clipping is orthogonal to the information signal itself, causing no additional penalty. Especially in intensity-modulated direct-detection optical channels, where a unipolar signal is to be transmitted, it is shown that this idea can improve system performance.
AB - A novel concept of pulse-amplitude-modulated discrete multitone modulation (PAM-DMT) is presented. It is shown that by pulse amplitude modulation of the subcarriers used, the resulting PAM-DMT time signal can be clipped asymmetrically to achieve a unipolar signal for transmission. The distortion resulting from this asymmetric clipping is orthogonal to the information signal itself, causing no additional penalty. Especially in intensity-modulated direct-detection optical channels, where a unipolar signal is to be transmitted, it is shown that this idea can improve system performance.
KW - Intensity modulation
KW - Optical fiber communication
KW - Orthogonal frequency-division multiplexing (ofdm)
UR - http://www.scopus.com/inward/record.url?scp=77955077535&partnerID=8YFLogxK
U2 - 10.1109/LPT.2009.2032663
DO - 10.1109/LPT.2009.2032663
M3 - Article
AN - SCOPUS:77955077535
VL - 21
SP - 1749
EP - 1751
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
SN - 1041-1135
IS - 23
ER -