On the performance of hybrid carrier system with spectrum precoding based on WFRFT

High out-of-band (OOB) power emission has become the main shortcoming of multicarrier scheme in regard to the requirements and challenges of 5G. In this paper, two effective OOB power reduction methods, previously applied to traditional orthogonal frequency division multiplexing (OFDM) system, are proposed in hybrid carrier (HC) scheme based on weighted-type fractional Fourier transform (WFRFT). Simulation results demonstrate that, due to the flexible selection of WFRFT order in the HC system, combined bit error rate (BER) and peak-to-average power ratio (PAPR) performance advantages are gained without sidelobe impact and significant complexity increase in comparison with the OFDM scheme with spectrum precoding. In projection precoding, a smaller error vector magnitude of precoder Gχ is obtained in the proposed hybrid carrier scheme. In SVD precoding with an orthogonal decoding at the receiver, better BER performance could also be acquired at WFRFT order over the fading channels. The proposed two WFRFT-based structures are complementary, and their potential scenarios are given. In addition, applying the feature of projection precoding to channel estimation, a novel pilot structure based on WFRFT is posed to reduce the introduced error of spectrum precoding and finally helps to improve the BER performance.

[1]  Tao Jiang,et al.  An Overview: Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals , 2008, IEEE Transactions on Broadcasting.

[2]  Qinyu Zhang,et al.  WFRFT Precoding for Narrowband Interference Suppression in DFT-Based Block Transmission Systems , 2013, IEEE Communications Letters.

[3]  Xuejun Sha,et al.  Hybrid Carrier Modulation with Time-Domain Windows and Iterative Equalization over Underwater Acoustic Channels , 2013, IEEE Communications Letters.

[4]  Xiaojing Huang,et al.  Out-of-band emission reduction and a unified framework for precoded OFDM , 2015, IEEE Communications Magazine.

[5]  Tao Jiang,et al.  Extended Active Interference Cancellation for Sidelobe Suppression in Cognitive Radio OFDM Systems With Cyclic Prefix , 2010, IEEE Transactions on Vehicular Technology.

[6]  Hüseyin Arslan,et al.  Mask Compliant Precoder for OFDM Spectrum Shaping , 2013, IEEE Communications Letters.

[7]  Xavier Mestre,et al.  The 5G candidate waveform race: a comparison of complexity and performance , 2017, EURASIP Journal on Wireless Communications and Networking.

[8]  Jaap van de Beek.  Orthogonal Multiplexing in a Subspace of Frequency Well-Localized Signals , 2010, IEEE Communications Letters.

[9]  Tao Jiang,et al.  Joint PAPR Reduction and Sidelobe Suppression Using Signal Cancelation in NC-OFDM-Based Cognitive Radio Systems , 2015, IEEE Transactions on Vehicular Technology.

[10]  Gerhard Fettweis,et al.  Precoded GFDM transceiver with low complexity time domain processing , 2016, EURASIP J. Wirel. Commun. Netw..

[11]  Xiaojing Huang,et al.  Sidelobe Suppression with Orthogonal Projection for Multicarrier Systems , 2012, IEEE Transactions on Communications.

[12]  Ming Chen,et al.  A precoding scheme for DFT-based OFDM to suppress sidelobes , 2009, IEEE Communications Letters.

[13]  Jaap van de Beek.  Sculpting the multicarrier spectrum: a novel projection precoder , 2009, IEEE Communications Letters.

[14]  Jaap van de Beek.  OFDM Spectral Precoding with Protected Subcarriers , 2013, IEEE Communications Letters.

[15]  Ning Ge,et al.  Virtual MIMO in Multi-Cell Distributed Antenna Systems: Coordinated Transmissions with Large-Scale CSIT , 2013, IEEE Journal on Selected Areas in Communications.

[16]  Naitong Zhang,et al.  Joint suppression of PAPR and sidelobe of hybrid carrier communication system based on WFRFT , 2015, 2015 IEEE/CIC International Conference on Communications in China (ICCC).

[17]  Xiaojing Huang,et al.  Optimal Orthogonal Precoding for Power Leakage Suppression in DFT-Based Systems , 2011, IEEE Transactions on Communications.

[18]  Fredrik Berggren,et al.  N-continuous OFDM , 2009, IEEE Communications Letters.

[19]  I-Tai Lu,et al.  Practical designs for out-of-band emission suppression and adjacent channel interference rejection for orthogonal frequency division multiplexing-based cognitive radios , 2015, EURASIP J. Wirel. Commun. Netw..

[20]  Hüseyin Arslan,et al.  Suppressing Alignment: Joint PAPR and Out-of-Band Power Leakage Reduction for OFDM-Based Systems , 2014, IEEE Transactions on Communications.

[21]  Michael Schnell,et al.  Reduction of out-of-band radiation in OFDM systems by insertion of cancellation carriers , 2006, IEEE Communications Letters.

[22]  Michael Schnell,et al.  Subcarrier weighting: a method for sidelobe suppression in OFDM systems , 2006, IEEE Communications Letters.

[23]  Dong-Ho Cho,et al.  Enhanced Spectrum Sensing Scheme in Cognitive Radio Systems With MIMO Antennae , 2011, IEEE Transactions on Vehicular Technology.

[24]  Geoffrey Ye Li,et al.  Cognitive radio networking and communications: an overview , 2011, IEEE Transactions on Vehicular Technology.

[25]  André Bourdoux,et al.  Performance of emerging multi-carrier waveforms for 5G asynchronous communications , 2017, EURASIP J. Wirel. Commun. Netw..

[26]  Xuejun Sha,et al.  On Interference Suppression in Doubly-Dispersive Channels with Hybrid Single-Multi Carrier Modulation and an MMSE Iterative Equalizer , 2012, IEEE Wireless Communications Letters.

[27]  Amine Amich,et al.  Accurate and Efficient Algorithms for Cognitive Radio Modeling Applications Under the i.n.i.d. Paradigm , 2015, IEEE Transactions on Vehicular Technology.

[28]  Zhenduo Wang,et al.  BER analysis of hybrid carrier system based on WFRFT with carrier frequency offset , 2015 .

[29]  Wei Feng,et al.  On the Deployment of Antenna Elements in Generalized Multi-User Distributed Antenna Systems , 2011, Mob. Networks Appl..

[30]  Yongtao Hui,et al.  4-weighted fractional Fourier transform over doubly selective channels and optimal order selecting algorithm , 2015 .