OFDM code-division multiplexing in fading channels

In this paper, orthogonal frequency-division multiplexing-code-division multiplexing (OFDM-CDM) is presented and investigated as alternative to conventional OFDM for high rate data transmission. An additional multipath diversity gain can be obtained with OFDM-CDM by spreading each data symbol in frequency and time. The optimum reliability information for the Viterbi (1979) decoder is derived for OFDM-CDM systems, and the tradeoff between spreading and channel coding in OFDM systems is presented. By using efficient interference cancellation or joint detection techniques, it can be shown that OFDM-CDM outperforms conventional OFDM with respect to bit error rate (BER) performance and bandwidth efficiency.

[1]  Jean-Paul M. G. Linnartz,et al.  Multi-Carrier Cdma In Indoor Wireless Radio Networks , 1994 .

[2]  Alain Glavieux,et al.  Reflections on the Prize Paper : "Near optimum error-correcting coding and decoding: turbo codes" , 1998 .

[3]  J.A.C. Bingham,et al.  Multicarrier modulation for data transmission: an idea whose time has come , 1990, IEEE Communications Magazine.

[4]  Masahiro Morikura,et al.  New high-rate wireless LAN standards , 1999, IEEE Commun. Mag..

[5]  Joachim Hagenauer,et al.  Rate-compatible punctured convolutional codes (RCPC codes) and their applications , 1988, IEEE Trans. Commun..

[6]  John G. Proakis,et al.  Probability, random variables and stochastic processes , 1985, IEEE Trans. Acoust. Speech Signal Process..

[7]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.

[8]  S. Weinstein,et al.  Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform , 1971 .

[9]  K. Fazel,et al.  On the Performance of Convolutionally-Coded CDMA/OFDM for Mobile Communication System , 1993 .

[10]  S. Kaiser.  Trade-off between channel coding and spreading in multi-carrier CDMA systems , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[11]  Joachim Hagenauer.  Source-controlled channel decoding , 1995, IEEE Trans. Commun..

[12]  Laurence B. Milstein,et al.  Performance of multicarrier DS CDMA systems , 1996, IEEE Trans. Commun..

[13]  Bruno O. Shubert,et al.  Random variables and stochastic processes , 1979 .

[14]  S. Kaiser.  On the performance of different detection techniques for OFDM-CDMA in fading channels , 1995, Proceedings of GLOBECOM '95.

[15]  V.W.S. Chan,et al.  Principles of Digital Communication and Coding , 1979 .

[16]  Geoffrey Ye Li,et al.  Robust channel estimation for OFDM systems with rapid dispersive fading channels , 1998, IEEE Trans. Commun..

[17]  J. Hagenauer.  Forward error correcting for CDMA systems , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[18]  Patrick Robertson,et al.  Pilot-symbol-aided channel estimation in time and frequency , 1997 .

[19]  J. Hagenauer,et al.  Multi-carrier CDMA with iterative decoding and soft-interference cancellation , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[20]  S. Kaiser,et al.  Multi-Carrier CDMA Mobile Radio Systems - Analysis and Optimisation of Detection, Decoding, and Channel Estimation , 1998 .