Walsh-Hadamard-Fourier transform based OFDM with space-multipath diversity

Walsh-Hadamard-Fourier transform based orthogonal frequency division multiplexing (WHFT-OFDM) is an efficient linearly precoded OFDM system to exploit multipath diversity in the frequency selective fading channel. This paper proposes a WHFT-OFDM scheme with space-multipath diversity by using the cyclic delay diversity (CDD) technique which deliberately introduces delayed echoes at transmitter to enhance the diversity gain of WHFT-OFDM. Moreover, the proposed WHFT-OFDM system provides an efficient way to implement the multicarrier code division multiple access for multiuser systems; its maximum multipath diversity, which is equal to the number of resolvable paths from the channels, is analyzed. Simulations are provided to validate the advantages of the proposed scheme.

[1]  Geoffrey Ye Li,et al.  Transmitter diversity for OFDM systems and its impact on high-rate data wireless networks , 1999, IEEE J. Sel. Areas Commun..

[2]  See-May Phoong,et al.  BER minimized OFDM systems with channel independent precoders , 2003, IEEE Trans. Signal Process..

[3]  Gerhard Bauch,et al.  Cyclic delay diversity with bit-interleaved coded modulation in orthogonal frequency division multiple access , 2006, IEEE Transactions on Wireless Communications.

[4]  Georgios B. Giannakis,et al.  Complex-field coding for OFDM over fading wireless channels , 2003, IEEE Trans. Inf. Theory.

[5]  Georgios B. Giannakis,et al.  Linearly precoded or coded OFDM against wireless channel fades? , 2001, 2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471).

[6]  H. Aghvami,et al.  Cyclic delay diversity based space-time/space-frequency coded MC-CDMA system , 2006, IEEE Vehicular Technology Magazine.

[7]  Stefan Kaiser,et al.  Spatial transmit diversity techniques for broadband OFDM systems , 2000, Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137).

[8]  Shihua Zhu,et al.  A Walsh-Hadamard coded spectral efficient full frequency diversity OFDM system , 2010, IEEE Transactions on Communications.

[9]  Said Boussakta,et al.  Fast Walsh–Hadamard–Fourier Transform Algorithm , 2011, IEEE Transactions on Signal Processing.

[10]  Georgios B. Giannakis,et al.  Linear constellation-precoding for OFDM with maximum multipath diversity and coding gains , 2001, Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256).

[11]  Hamid Aghvami,et al.  Performance comparison of space-time block coded and cyclic delay diversity MC-CDMA systems , 2005, IEEE Wireless Communications.

[12]  Cihan Tepedelenlioglu,et al.  Maximum multipath diversity with linear equalization in precoded OFDM systems , 2004, IEEE Transactions on Information Theory.

[13]  Harald Haas,et al.  On Cyclic Delay Diversity in OFDM Based Transmission Schemes , 2002 .

[14]  Jiyu Jin,et al.  Low complexity discrete Hartley transform precoded OFDM for peak power reduction , 2012 .

[15]  Jonathan Loo,et al.  Laboratory Measurement Campaign of DVB-T Signal With Transmit Delay Diversity , 2008, IEEE Transactions on Broadcasting.

[16]  Georgios B. Giannakis,et al.  Space-time-multipath coding using digital phase sweeping or circular delay diversity , 2005, IEEE Trans. Signal Process..

[17]  Charalampos Tsimenidis,et al.  OFDM Based on Low Complexity Transform to Increase Multipath Resilience and Reduce PAPR , 2011, IEEE Transactions on Signal Processing.

[18]  A. Holt,et al.  Fast algorithm for calculation of both Walsh-Hadamard and Fourier transforms (FWFTs) , 1989 .