An Improved Fixed Sphere Decoder Employing Soft Decision for the Detection of Non-orthogonal Signals

This letter proposes a hybrid soft iterative method together with Fixed Sphere Decoding (FSD) concurrently optimize performance and complexity. We show that for bandwidth compression factors of up to 25 percent, we can achieve the same performance as Orthogonal Frequency Division Multiplexing (OFDM). For systems with bandwidth compression higher than 25 percent, the complexity/performance trade-offs of the hybrid method are better than those of Truncated Singular Value Decomposition-FSD (TSVD-FSD).

[1]  Fredrik Rusek,et al.  Multistream Faster than Nyquist Signaling , 2009, IEEE Transactions on Communications.

[2]  Izzat Darwazeh,et al.  A Spectrally Efficient Frequency Division Multiplexing Based Communication System , 2003 .

[3]  Farrokh Marvasti,et al.  Iterative Detection with Soft Decision in Spectrally Efficient FDM Systems , 2013, ArXiv.

[4]  Stan Kay,et al.  Iterative interference cancellation for high spectral efficiency satellite communications , 2002, IEEE Trans. Commun..

[5]  Izzat Darwazeh,et al.  Spectrally Efficient FDM Signals: Bandwidth Gain at the Expense of Receiver Complexity , 2009, 2009 IEEE International Conference on Communications.

[6]  Fredrik Rusek,et al.  Faster-Than-Nyquist Signaling , 2013, Proceedings of the IEEE.

[7]  Izzat Darwazeh,et al.  FPGA implementations of real-time detectors for a spectrally efficient FDM system , 2013, ICT 2013.

[8]  Dario Fertonani,et al.  Time-frequency packing for linear modulations: spectral efficiency and practical detection schemes , 2009, IEEE Transactions on Communications.

[9]  John S. Thompson,et al.  Rapid Prototyping of a Fixed-Throughput Sphere Decoder for MIMO Systems , 2006, 2006 IEEE International Conference on Communications.

[10]  Izzat Darwazeh,et al.  Performance trade-offs and DSP evaluation of spectrally efficient FDM detection techniques , 2013, 2013 IEEE International Conference on Communications (ICC).

[11]  Farrokh Marvasti,et al.  Recovery of signals from nonuniform samples using iterative methods , 1991, IEEE Trans. Signal Process..

[12]  Izzat Darwazeh,et al.  A practical system for improved efficiency in frequency division multiplexed wireless networks , 2012, IET Commun..

[13]  Dario Fertonani,et al.  SISO Detection Over Linear Channels With Linear Complexity in the Number of Interferers , 2011, IEEE Journal of Selected Topics in Signal Processing.

[14]  Izzat Darwazeh,et al.  A Truncated SVD approach for fixed complexity spectrally efficient FDM receivers , 2011, 2011 IEEE Wireless Communications and Networking Conference.

[15]  Farrokh Marvasti.  An iterative method to compensate for the interpolation distortion , 1989, IEEE Trans. Acoust. Speech Signal Process..