Title :
On decoding and equalization of multidimensional trellis-coded OFDM systems
Author :
Liu, Pei-Chun ; Chen, Kwang-Cheng
Author_Institution :
Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taiwan
Abstract :
In this paper, we develop an effective method, multicarrier parallel decision feedback decoding (MC-PDFD), to combat the residual ISI (intersymbol interference) effect in OFDM systems employing multi-dimensional trellis-coded modulation (TCM) scheme. The proposed method operates on reduced-state trellises with modified branch metric in order to accommodate OFDM and other multicarrier communications. MC-PDFD combines the tasks of trellis decoding and equalization altogether and removes the residual ISI simultaneously with decoding process. Simulation results show that MC-PDFD works well in different channel conditions with perfect channel information and degrades slightly with non-perfect channel information.
Keywords :
OFDM modulation; decoding; equalisers; interference suppression; intersymbol interference; mobile communication; multimedia communication; trellis coded modulation; decoding; equalization; intersymbol interference; mobile multimedia service; multicarrier communication; multicarrier parallel decision feedback decoding; multidimensional trellis-coded OFDM system; orthogonal frequency division multiplexing; reduced-state trellis; trellis-coded modulation; Convolutional codes; Decoding; Fading; Fast Fourier transforms; Feedback; Intersymbol interference; Maximum likelihood estimation; Multidimensional systems; OFDM modulation; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1208852
