A low-complexity multiple signal representation scheme in downlink OFDM-CDMA. (English) Zbl 1181.94040
Summary: OFDM-CDMA is an attractive technique for broadband wireless communication. However, the high peak-to-average power ratio (PAPR) of the downlink signals, generated from multiple spread codes, remains a serious problem. In this paper, a low-complexity multiple signal representation (MSR) scheme is proposed to control the PAPR problem in downlink OFDM-CDMA systems. The proposed scheme generates multiple candidate signals by a novel user grouping scheme, which is without distortion and can provide more PAPR reduction than the conventional MSR schemes, such as partial transmit sequence (PTS) and selective mapping (SLM). Furthermore, a low-complexity processing structure is developed using a novel joint spreading and inverse fast Fourier transform (S-IFFT) to simplify the generation of multiple candidate signals. Complexity analysis and numerical results show that the OFDM-CDMA systems employing the proposed scheme have better tradeoff between PAPR reduction and computational complexity, compared with the conventional MSR schemes.
MSC:
| 94A12 | Signal theory (characterization, reconstruction, filtering, etc.) |
| 68M10 | Network design and communication in computer systems |
| 65T50 | Numerical methods for discrete and fast Fourier transforms |
| 94A11 | Application of orthogonal and other special functions |
References:
| [1] | Fazel K S. Multi-Carrier and Spread Spectrum Systems. Hoboken, NJ: Wiley, 2003 |
| [2] | Helard M, Le Gouable R, Hélard J F, et al. Multicarrier CDMA techniques for future wideband wireless networks. Ann Telecommun, 2001, 56: 260–274 |
| [3] | Kaiser S. OFDM code-division multiplexing in fading channels. IEEE Trans Commun, 2002, 50(6): 1266–1273 · doi:10.1109/TCOMM.2002.801460 |
| [4] | Chen J D, Ueng F B, Su H. Performance analyses of OFDMCDMA receivers in multipath fading. IEEE Trans Veh Technol, 2009, 1 |
| [5] | Phasouliotis A, So D K C. Performance analysis and comparison of downlink MIMO MC-CDMA and MIMO OFDMA systems. In: Proceeding of IEEE VTC-Spring’2009. Barcelona, Spain, 2009. 1–6 |
| [6] | Bingham J A C. Multicarrier modulation for data transmission: An idea whose time has come. IEEE Commun Mag, 1990, 28(5): 5–14 · doi:10.1109/35.54342 |
| [7] | Yee N, Linnartz J P, Fettweis G. Multi-carrier CDMA in indoor wireless radio networks. IEICE Trans Commun, 1994, E77-B(7): 900–904 |
| [8] | Kishiyama Y, Maeda N, Higuchi K, et al. Transmission performance analysis of VSF-OFCDM broadband packet wireless access based on field experiments in 100-MHz forward link. Proc IEEE VTC, 2004, 60(5): 3328–3333 |
| [9] | Umehira M, Sugiyama T. OFDM/CDMA technologies for future broadband mobile communication systems. IEICE Trans Fund Electr Commun Comp Sci, 2002, E85-A(12): 2804–2812 |
| [10] | Chang B J, Wu C H. Adaptive load balancing MDP-based approach of two-dimensional spreading for VSF-OFCDM in 4G next-generation cellular communications. IEEE Trans Veh Technol, 2009, 58(3): 1143–1156 · doi:10.1109/TVT.2008.928905 |
| [11] | Nobilet S, Helard J F, Mottier D. Spreading sequences for uplink and downlink MC-CDMA systems: PAPR and MAI minimization. Eur Trans Telecommun, 2002, 13(5): 465–474 · doi:10.1002/ett.4460130507 |
| [12] | Seung H H, Jae H L. An overview of peak-to-average power ratio reduction techniques for multicarrier transmission. IEEE Wirel Commun, 2005, 12(2): 56–65 · doi:10.1109/MWC.2005.1421929 |
| [13] | Jayalath A D S, Athaudage C R N. On the PAR reduction of OFDM signals using multiple signal representation. IEEE Commun Lett, 2004, 8(7): 425–427 · doi:10.1109/LCOMM.2004.832767 |
| [14] | Cho M H, Lee S J, Jin J Y, et al. A study on the PAPR using variable code sets (VCS) in multi-user OFDM-CDMA system. Proc IEEE, 2004, 60(5): 3448–3451 |
| [15] | Liu S S, Dan L L, Xiao Y, et al. PAPR reduction based on improved VCS scheme in MC-CDMA system. In: Proceedings of IEEE VTC2007-Spring, Dublin, Ireland, 2007. 2672–2676 |
| [16] | You Y H, Jeon W G, Park J H, et al. A simple construction of OFDM-CDMA signals with low Peak-To-Average power ratio. IEEE Trans Broadcast, 2003, 49(4): 403–407 · doi:10.1109/TBC.2003.819052 |
| [17] | You Y H, Jeon W G, Park J H, et al. Performance evaluation of OFDM-CDMA with multiple antennas for broadband wireless access networks. IEEE Trans Vel Technol, 2005, 54(1): 385–398 · doi:10.1109/TVT.2004.838824 |
| [18] | Jitapunkul S, Wutthipornpong K, Songthanasak J, et al. Peak to average power ratio reduction in OFDM-CDMA using partial transmit sequences. In: Proceedings of IEEE WTS2004, Pomana, CA, USA, 2004. 3–8 |
| [19] | You Y H, Jeon W G, Park J H, et al. Low-cmplexity PAR reduction schemes using SLM and PTS approaches for OFDMCDMA signals. IEEE Trans Consum Electr, 2003, 49(2): 284–289 · doi:10.1109/TCE.2003.1209515 |
| [20] | Zhang C, Fu Y W, Zhang E Y. Peak-to-average power ratio reduction using orthogonal complementary spreading codes in MC-CDMA system. Chin J Electr, 2007, 16(3): 476–480 |
| [21] | Choi B J, Hanzo L. Crest factors of complementary-sequencebased multicode OFDM-CDMA signals. IEEE Trans Wirel Commun, 2003, 2(6): 1114–1119 · doi:10.1109/TWC.2003.819040 |
| [22] | Choi B J, Kuan E L, Hanzo L. Crest-factor study of OFDMCDMA and OFDM. In: Proceedings of IEEE VTC-Fall’99. Houseton, Texas, USA, 1999. 233–237 |
| [23] | Gazda J, Drotar P, Kocur D, et al. On MC-CDMA transmission system performance at nonlinear high power amplifier of transmitter over frequency selective fading channel. In: Proceeding of RadioElektronika’09. Bratislava, Slovak Republic, 2009. 35–38 |
| [24] | Chih-Lin I, Gitlin R D. Multi-code CDMA wireless personal communications networks. In: Proceedings of Int Conf Commun (ICC), Seattle, WA, USA, June 1995, 2: 1060–1064 |
| [25] | Wulich D, Dinur N, Glinowiecki A. Level clipped high-order OFDM. IEEE Trans Commun, 2000, 48(6): 928–930 · doi:10.1109/26.848551 |
| [26] | van Nee R, Prasad R. OFDM for Wireless Multimedia Communications. Boston: Artech House, 2000 |
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