KLT-based PAPR reduction technique for LTE-Advanced uplink with carrier aggregation

In LTE-Advanced, carrier aggregation (CA) allows the extension of the bandwidth allocated to a certain user up to 100 MHz. In particular, the NxSC-FDMA has been selected as the uplink extension scheme. However, one of the main practical challenges that comes with CA is the severe increase in the peak-to-average-power ratio (PAPR) of the aggregated time domain NxSC-FDMA signal. The PAPR increase is an important issue as it affects the efficiency of the power amplifier (PA) at the user equipment (UE) and equivalently the transmission coverage of the LTE-Advanced system. In this paper we propose a PAPR reduction technique based on the well-known Karhunen-Loeve Transform (KLT) to reduce the PAPR of the NxSC-FDMA signals. Several CA scenarios were analyzed using the proposed technique and simulation results show that the performance of the PAPR has improved by 1.5 dB in case of carrier aggregation of two CCs.

[1]  Slim Boumaiza,et al.  Crest Factor Reduction of Inter-Band Multi-Standard Carrier Aggregated Signals , 2014, IEEE Transactions on Microwave Theory and Techniques.

[2]  Gauraw Kumar Srivastava,et al.  Crest factor reduction for carrier aggregated OFDM systems , 2012, SoftCOM 2012, 20th International Conference on Software, Telecommunications and Computer Networks.

[3]  Yasir Rahmatallah,et al.  Peak-To-Average Power Ratio Reduction in OFDM Systems: A Survey And Taxonomy , 2013, IEEE Communications Surveys & Tutorials.

[4]  Xu Ning,et al.  PAPR reduction of uplink for carrier aggregation in LTE-Advanced , 2010, The 2nd International Conference on Information Science and Engineering.

[5]  Andy C. Downton,et al.  A fine-grained parallel pipelined Karhunen-Loeve transform , 2003, Proceedings International Parallel and Distributed Processing Symposium.

[6]  Yang-Han Lee,et al.  Low-PAPR Spectral Filter for Carrier Aggregated Transmission System , 2014 .

[7]  Hazem M. Abbas,et al.  Neural model for Karhunen?Loe?ve trans-form with application to adaptive image compression , 1993, INFOCOM 1994.

[8]  Hassan Artail,et al.  A Low-Complexity PAPR Reduction Technique for LTE-Advanced Uplink with Carrier Aggregation , 2014, 2015 IEEE Global Communications Conference (GLOBECOM).

[9]  Mohsen Guizani,et al.  Carrier aggregation for LTE-advanced: uplink multiple access and transmission enhancement features , 2013, IEEE Wireless Communications.

[10]  Yan Meng,et al.  PAPR reduction with multiple antennas transmission for carrier aggregation , 2012, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC).

[11]  Cengis Hasan,et al.  2013 IEEE 9th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob) , 2013 .

[12]  Chau-Yun Hsu,et al.  PAPR Reduction of OFDM Signals Using Coefficient Array of Orthogonal Transform Kernels , 2006, IEEE Vehicular Technology Conference.

[13]  N. B. Chakrabarti,et al.  A recursive filter implementation of KL transform , 1995, Signal Process..

[14]  David J. Goodman,et al.  Peak-To-Average Power Ratio of Single Carrier FDMA Signals with Pulse Shaping , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.

[15]  Kamran Etemad,et al.  Carrier aggregation framework in 3GPP LTE-advanced [WiMAX/LTE Update] , 2010, IEEE Communications Magazine.

[16]  L. Prina Ricotti,et al.  Neural clustering for optimal KLT image compression , 1993, IEEE Trans. Signal Process..

[17]  Hassan Artail,et al.  PAPR reduction in LTE-Advanced carrier aggregation using low-complexity joint interleaving technique , 2015, 2015 IEEE Wireless Communications and Networking Conference (WCNC).

[18]  Hlaing Minn,et al.  Low complexity PAPR reduction methods for carrier-aggregated MIMO OFDMA and SC-FDMA systems , 2012, EURASIP J. Wirel. Commun. Netw..

[19]  C. Tellambura.  Upper bound on peak factor of N-multiple carriers , 1997 .