Parameters Optimization of Multiuser OFDM on Doubly Selective Fading Channels

This paper describes parameters design of multiuser OFDM on doubly selective fading channels. It is well-known that OFDM is vulnerable to time selectivity due to the extension of symbol period, generating inter-carrier interference (ICI). In this paper, we first derive the closed form of signal to interference plus noise ratio (SINR) for single user OFDM with a linear time-varying model. In multiuser case, we propose several design criteria depending on the channel environments. We also discuss an effect of subcarrier allocation on the parameters optimization in multiuser access systems.

[1]  Heidi Steendam,et al.  Analysis and optimization of the performance of OFDM on frequency-selective time-selective fading channels , 1999, IEEE Trans. Commun..

[2]  W. C. Jakes,et al.  Microwave Mobile Communications , 1974 .

[3]  Donald C. Cox,et al.  ICI mitigation for pilot-aided OFDM mobile systems , 2005, IEEE Transactions on Wireless Communications.

[4]  Sok-Kyu Lee,et al.  Equalization scheme for OFDM systems in long delay spread channels , 2004, 2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754).

[5]  H. Kuchenbecker,et al.  Intercarrier and intersymbol interference analysis of OFDM systems on time-varying channels , 2003, 2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications - SPAWC 2003 (IEEE Cat. No.03EX689).

[6]  Ye Li,et al.  Bounds on the interchannel interference of OFDM in time-varying impairments , 2001, IEEE Trans. Commun..

[7]  Frank Kelly,et al.  Rate control for communication networks: shadow prices, proportional fairness and stability , 1998, J. Oper. Res. Soc..

[8]  Yang-Seok Choi,et al.  On channel estimation and detection for multicarrier signals in fast and selective Rayleigh fading channels , 2001, IEEE Trans. Commun..

[9]  Kwang Bok Lee,et al.  Transmit power adaptation for multiuser OFDM systems , 2003, IEEE J. Sel. Areas Commun..

[10]  G.L. Stuber,et al.  Interchannel interference analysis of OFDM in a mobile environment , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.