TY - GEN
T1 - Adaptive equalization for filter bank based multicarrier systems
AU - Waldhauser, Dirk S.
AU - Baltar, Leonardo G.
AU - Nossek, Josef A.
PY - 2008
Y1 - 2008
N2 - Filter bank based multicarrier systems (FBMC) offer a number of benefits over conventional orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP). One benefit is the improved spectral efficiency by not using a redundant CP and by having much better control of out-of-band emission. Another advantage is the ease of accomodating multiple users in an FDMA fashion especially in the uplink, i. e. the multiple access channel (MAC). On the other hand, more elaborate equalization concepts are needed compared to the single-tap per-subcarrier equalizer sufficient in the OFDM with CP case. Therefore, we will present a least-mean-square (LMS) algorithm which is adapted to the principle of orthogonally multiplexed QAM filter banks (OQAM-FBMC). This leads to an adaptive equalizer solution with low complexity. The initialization of the LMS equalizer results from a pilot based channel estimation. The results will be compared with a classical OFDM system, where the loss in data rate is compensated with a higher modulation scheme.
AB - Filter bank based multicarrier systems (FBMC) offer a number of benefits over conventional orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP). One benefit is the improved spectral efficiency by not using a redundant CP and by having much better control of out-of-band emission. Another advantage is the ease of accomodating multiple users in an FDMA fashion especially in the uplink, i. e. the multiple access channel (MAC). On the other hand, more elaborate equalization concepts are needed compared to the single-tap per-subcarrier equalizer sufficient in the OFDM with CP case. Therefore, we will present a least-mean-square (LMS) algorithm which is adapted to the principle of orthogonally multiplexed QAM filter banks (OQAM-FBMC). This leads to an adaptive equalizer solution with low complexity. The initialization of the LMS equalizer results from a pilot based channel estimation. The results will be compared with a classical OFDM system, where the loss in data rate is compensated with a higher modulation scheme.
UR - http://www.scopus.com/inward/record.url?scp=51749090181&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2008.4542113
DO - 10.1109/ISCAS.2008.4542113
M3 - Conference contribution
AN - SCOPUS:51749090181
SN - 9781424416844
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 3098
EP - 3101
BT - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
T2 - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
Y2 - 18 May 2008 through 21 May 2008
ER -