Analysis and design of a WLAN OFDM transmitter with digital filters

This paper introduces a study and an implementation of filters in the digital part of an Orthogonal Frequency Division Multiplexing (OFDM) based transmitter. An efficient computational technique is presented for design with interpolation filters and discusses the corresponding VLSI architecture issues. By exploiting the redundancy into the cyclic prefix part of the OFDM symbol, the computational load of the transmitter is reduced by approximately 20% for the IEEE 802.11 WLAN standard.

[1]  Vassilis Paliouras,et al.  A computational technique and a VLSI architecture for digital pulse shaping in OFDM modems , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[2]  Ramjee Prasad,et al.  OFDM for Wireless Multimedia Communications , 1999 .

[3]  Alan V. Oppenheim,et al.  Discrete-time Signal Processing. Vol.2 , 2001 .

[4]  Michael Faulkner,et al.  The effect of filtering on the performance of OFDM systems , 2000, IEEE Trans. Veh. Technol..

[5]  Michael Faulkner,et al.  Comparison of three interpolator designs for use in OFDM transmitters , 2006 .

[6]  Shousheng He,et al.  Design and implementation of a 1024-point pipeline FFT processor , 1998, Proceedings of the IEEE 1998 Custom Integrated Circuits Conference (Cat. No.98CH36143).