论文信息 - Algorithm to Improve the Performance of OFDM based WLAN Systems

Algorithm to Improve the Performance of OFDM based WLAN Systems

In this paper we propose a new form of adaptive modulation which has the ability of using the higher order modulation schemes such as 256-QAM and 128-QAM at low SNR values in order to enhance the data rate without degrading the SER performance especially at low SNR values. This new form of adaptive modulation is combined together with the power control and the PAPR clipping and filtering technique to produce a new algorithm. This algorithm is called MPC (adaptive Modulation, Power control and Clipping), which is not aim only to reduce the PAPR, but also to enhance the data rate of OFDM based WLAN systems.

D. Sreenivasa Rao | M. Kanti Kiran | K. Sri Ramakrishna

[1] M. Tomlinson,et al. Peak to average power reduction for OFDM schemes by selective scrambling , 1996 .

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

[3] Xiaodong Li,et al. Effects of clipping and filtering on the performance of OFDM , 1998, IEEE Communications Letters.

[4] T. Wilkinson,et al. Block coding scheme for reduction of peak to mean envelope power ratio of multicarrier transmission schemes , 1994 .

[5] Leonard J. Cimini,et al. Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing , 1985, IEEE Trans. Commun..

[6] Hamid Jafarkhani,et al. On the computation and reduction of the peak-to-average power ratio in multicarrier communications , 2000, IEEE Trans. Commun..

[7] S. Wang,et al. IEEE standard 802.16: a technical overview of the WirelessMAN/sup TM/ air interface for broadband wireless access , 2002, IEEE Communications Magazine.

[8] Willie W. Lu. 4G mobile research in Asia , 2003, IEEE Communications Magazine.