Reconfigurable N-Point FFT Processor Design For OFDM System

Under many research works, it has been observed that the multiple input multiple output (MIMO) system can be considered an efficient solution for the high-speed wireless communication. However, the delay spreads in non-flat fading channels abrupt the functioning of MIMO system. In orthogonal frequency division multiplexing (OFDM), the channel impulse response is flat in each sub carrier. Hence, MIMO with OFDM can be used effectively in non flat fading channels. MIMO OFDM system requires many independent baseband processors thereby increasing hardware complexity of the system. So there is a need to reduce the hardware complexity of FFT/IFFT processor. The proposed model uses multipath delay commutator (MDC) architecture to design a reconfigurable N-point FFT processor.

[1]  Yunho Jung,et al.  New efficient FFT algorithm and pipeline implementation results for OFDM/DMT applications , 2003, IEEE Trans. Consumer Electron..

[2]  Jari Nurmi,et al.  A scalable FFT processor architecture for OFDM based communication systems , 2013, 2013 International Conference on Embedded Computer Systems: Architectures, Modeling, and Simulation (SAMOS).

[3]  Jong-Won Park,et al.  Design of FFT processor for IEEE802.16m MIMO-OFDM systems , 2010, 2010 International Conference on Information and Communication Technology Convergence (ICTC).

[4]  Muh-Tian Shiue,et al.  A low power and variable-length FFT processor design for flexible MIMO OFDM systems , 2009, 2009 IEEE International Symposium on Circuits and Systems.

[5]  Yunho Jung,et al.  Design of low-complexity FFT processor for MIMO-OFDM based SDR systems , 2010, 2010 The 12th International Conference on Advanced Communication Technology (ICACT).

[6]  Jaeseok Kim,et al.  Low complexity multi-point 4-channel FFT processor for IEEE 802.11n MIMO-OFDM WLAN system , 2012, 2012 International Conference on Green and Ubiquitous Technology.

[7]  K. Karthikeyan,et al.  VLSI design of mixed radix FFT Processor for MIMO OFDM in wireless communications , 2010, 2010 INTERNATIONAL CONFERENCE ON COMMUNICATION CONTROL AND COMPUTING TECHNOLOGIES.

[8]  Jaeseok Kim,et al.  Low complexity pipeline FFT processor for MIMO-OFDM systems , 2007, IEICE Electron. Express.

[9]  A. Chavan,et al.  FPGA Based Implementation Of Baseband OFDM Transceiver Using VHDL , 2014 .

[10]  Prajakta Borole,et al.  Hardware Implementation of an OFDM Transceiver for 802.11n systems , 2013 .

[11]  Chen-Yi Lee,et al.  Design of an FFT/IFFT Processor for MIMO OFDM Systems , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[12]  Yuan-Hao Huang,et al.  A variable-length FFT processor for 4×4 MIMO-OFDM systems , 2010, Proceedings of 2010 International Symposium on VLSI Design, Automation and Test.

[13]  T. Sansaloni,et al.  Efficient pipeline FFT processors for WLAN MIMO-OFDM systems , 2005 .