Abstract
Opportunistic beamforming (OBF) is an effective way to increase the multiuser diversity (MUD) of the communication systems; with employing OBF in OFDM system, in addition to the MUD gain, frequency diversity gain is also obtainable. However, the complexity of the OBF-OFDM system is increased and the peak-to-average power-ratio (PAPR) of the OFDM signals must be reduced. The reduction of signals’ PAPR and complexity of the system is modeled as the design of phase sequences in this paper. Hence, periodic phase sequences are designed and employed to reduce the OFDM signals’ PAPR and the complexity of the normal OBF-OFDM system simultaneously, where the transmit data at all antennas can be generated in time domain directly via one N-point IFFT. The simulation results show that, after the proposed schemes are adopted, complexity of the OBF-OFDM system is reduced and the system throughput, both in the maximum throughput scheduling scheme and the proportional fairness scheduling scheme, is almost same as that of the normal OBF-OFDM system and greater than that of non-OBF OFDM.
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You X., Chen G., Chen M., Gao X. (2005) Toward beyond 3G: The fuTURE project in China. IEEE Communications Magazine 43(1): 70–75
Sternad M., Svensson T., Ottosson T., Ahlen A., Svensson A., Brunström A. (2007) Towards systems beyond 3G based on adaptive OFDMA transmission. Proceedings of the IEEE 95(12): 2432–2455
IEEE Std 802.16-2004. IEEE standard for local and metropolitan area networks part 16: Air interface for fixed broadband wireless access systems.
Knopp, R., & Humblet, P. A. (1995). Information capacity and power control in single cell multiuser communications. In Proceedings of International Conference on Communications (pp. 331–335). Seattle, USA.
Viswanath P., Tse D. N. C, Laroia R. (2002) Opportunistic beamforming using dumb antennas. IEEE Transactions on Information Theory 48(6): 1277–1294
Baran, I. R., & Uchoa-Filho, B. F. (2006). Enhanced opportunistic beamforming for Jakes-correlated fading channels. 2006 International Telecommunications Symposium (pp. 1024–1029). Fortaleza, Ceara.
Svedman P., Wilson S. K., Cilini L. J., Ottersten B. (2007) Opportunistic beamforming and scheduling for OFDMA systems. IEEE Transactions Communications 55(5): 941–952
Pan, Z., & Chen, L. (2006). A novel simplified opportunistic beamforming method for wide-band systems. In Proceeding of IEEE Wireless Communications and Networking Conference (vol.3, pp.1747–1752). Las Vegas, USA.
Le Khoa N. (2010) BER of OFDM in Rayleigh fading environments with selective diversity. Wireless Communications and Mobile Computing 10(2): 306–311
Le K. N. (2008) Insights on ICI and its effects on performance of OFDM systems. Digital Signal Processing 18(6): 876–884
Le K. N. (2008) Bounds on inter-carrier interference power of OFDM in a Gaussian scattering channel. Wireless Personal Communications 47(3): 355–362
Han S. H., Lee J. H. (2005) An overview of peak-to-average power ratio reduction techniques for multicarrier transmission. IEEE Transactions on Wireless Communications 12(2): 56–65
Muller S. H., Huber J. B. (1997) OFDM with reduced peak to average power ratio by optimum combination of partial transmit sequences. Electronics Letters 33(5): 368–369
Lu G., Wu P., Catharina Carlemalm Logothetis. (2006) Peak-to-average power ratio reduction in OFDM based on the transformation of partial transmit sequences. Electronics Letters 42(2): 105–106
Kang S. G., Kim J. G., Joo E. K. (1999) A novel subblock partition scheme for partial transmit sequence OFDM. IEEE Transactions on Broadcasting 45(3): 333–338
Baml R. W., Fischer R. F. H., Huber J. B. (1996) Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping. Electronics Letters 32(22): 2056–2057
Liu, Y., & Lu, G. (2009). Enhanced selected mapping via candidates combination for PAPR reduction in OFDM. In Proceedings of 5-th Internationa Conference on Wireless Communications, Networking and Mobile Computing (WiCOM 2009). Beijing, China.
Lu G., Wu P., Aronsson D. (2007) Peak-to-average power ratio reduction in OFDM using cyclically shifted phase sequences. IET Communications 1(6): 1146–1151
Oppenheim, A. V., Schafer, R. W., & Buck, J. R. (1999). Discrete-time signal processing. Prentice Hall.
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Lu, G., Zhang, L., Yu, H. et al. Joint Optimization for PAPR Reduction and Opportunistic Beamforming (OBF) in OFDM Systems. Wireless Pers Commun 63, 947–963 (2012). https://doi.org/10.1007/s11277-010-0176-4
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DOI: https://doi.org/10.1007/s11277-010-0176-4