TY - JOUR
T1 - Frequency domain equalization of DMT/OFDM systems with insufficient guard interval
AU - Trautmann, Steffen
AU - Karp, Tanja
AU - Fliege, Norbert J.
PY - 2002
Y1 - 2002
N2 - In this paper, we propose a new, generalized approach for equalization of discrete multi-tone (DMT) systems, which not only uses redundancy in the time domain by adding a guard interval, but also takes advantage of existing or intentionally placed redundancy in the frequency domain. For this purpose, we replace the one tap frequency equalizer in the DMT receiver by a block equalizer and derive sufficient conditions for zero forcing equalization, i.e. perfect removal of intersymbol and intercarrier interference. We show that the equalizer matrix is sparse, thus resulting in a low computational complexity. Furthermore, the equalization approach allows to trade off the guard interval in the time domain for unused subcarriers in the frequency domain.
AB - In this paper, we propose a new, generalized approach for equalization of discrete multi-tone (DMT) systems, which not only uses redundancy in the time domain by adding a guard interval, but also takes advantage of existing or intentionally placed redundancy in the frequency domain. For this purpose, we replace the one tap frequency equalizer in the DMT receiver by a block equalizer and derive sufficient conditions for zero forcing equalization, i.e. perfect removal of intersymbol and intercarrier interference. We show that the equalizer matrix is sparse, thus resulting in a low computational complexity. Furthermore, the equalization approach allows to trade off the guard interval in the time domain for unused subcarriers in the frequency domain.
UR - http://www.scopus.com/inward/record.url?scp=0036286364&partnerID=8YFLogxK
U2 - 10.1109/ICC.2002.997128
DO - 10.1109/ICC.2002.997128
M3 - Article
AN - SCOPUS:0036286364
SN - 0536-1486
VL - 3
SP - 1646
EP - 1650
JO - IEEE International Conference on Communications
JF - IEEE International Conference on Communications
ER -