|
|
- 2017
一种降低OFDM误码率及立方度量值的凸优化算法
|
Abstract:
相比于功率峰均比（PAPR），立方度量能够更加准确地预测功放的功率回退量，因此被认为是更有效的衡量正交频分复用（OFDM）信号包络变化的度量。为了提高功放效率，常用优化方法是直接最小化信号的立方度量值。然而，这样会引入严重的带内失真，造成系统误码率性能的恶化。该文提出了一种在立方度量值约束下最小化系统带内失真的凸优化模型，并设计了内点法定制方案求解此优化问题。仿真结果显示该算法相比现有优化算法能够显著提高系统误码率及立方度量性能。
| [1] | FAZEL K, KAISER S. Multi-carrier and spread spectrum systems:From OFDM and MC-CDMA to LTE and WiMAX[M]. 2nd ed, Chichester, United Kingdom:John Wiley and Sons Limited, 2008. |
| [2] | BOYD S, VANDENBERGHE L. Convex optimization[M]. Cambridge, United Kingdom:Cambridge University Press, 2004. |
| [3] | ZHU Xiao-dong, HU Hai-chao, TANG You-xi. Descendent clipping and filtering for cubic metric reduction in OFDM systems[J]. Electronic Letters, 2013, 49(9):599-600. |
| [4] | Motorola. Comparison of PAR and cubic metric for power de-rating, Tdoc R1-040522[R]. Montreal, Canada:3GPP TSG RAN, 2004. |
| [5] | AL-DALAKTA E, AL-DWEIK A, HAZMI A, et al. Efficient BER reduction technique for nonlinear OFDM transmission using distortion prediction[J]. IEEE Transactions on Vehicular Technology, 2012, 61(5):2330-2336. |
| [6] | Motorola. Cubic metric in 3GPP-LTE.3GPP TSG RAN WG1 LTE Adhoc, Tdoc R1-060023[R]. Helsinki, Finland:[s.n.], 2006. |
| [7] | ZHU Xiao-dong, HU Hai-chao, MENG Zhong-lou, et al. On minimizing the cubic metric of OFDM signals using Convex optimization[J]. IEEE Transactions on Broadcasting, 2014, 60(3):511-523. |
| [8] | HOU Jun, GE Jian-hua, LI Jing. Peak-to-average power ratio reduction of OFDM signals using PTS scheme with low computational complexity[J]. IEEE Transactions on Broadcasting, 2011, 57(1):143-148. |
| [9] | JIANG Tao, YAO Wen-bing, GUO Peng, et al. Two novel nonlinear companding schemes with iterative receiver to reduce PAPR in multicarrier modulation systems[J]. IEEE Transactions on Broadcasting, 2006, 56(2):268-273. |
| [10] | 3GPP. Base station (BS) radio transmission and reception:36.104 V8.10.0[S].[S.l.]:Technical Standard, 2010. |
| [11] | RAHMATALLAH Y, MOHAN S. Peak-to-average power ratio reduction in OFDM systems:a survey and taxonomy[J]. IEEE Communications Surveys & Tutorials, 2013, 15(4):1567-1592. |
| [12] | WUNDER G, FISCHER R F H, BOCHE H, et al. The PAPR problem in OFDM transmission:New directions for a long-lasting problem[J]. IEEE Signal Processing Magazine, 2013, 30(6):130-144. |
| [13] | DEUMAL M, BEHRAVAN A, PIJOAN J L. On cubic metric reduction in OFDM systems by tone reservation[J]. IEEE Transactions on Communications, 2011, 59(6):1612-1620. |
| [14] | IRUKULAPATI N V, CHAKKA V K, JAIN A. SLM based PAPR reduction of OFDM signal using new phase sequence[J]. Electronic Letters, 2009, 45(24):1231-1232. |
| [15] | WANG Yong-chao, LUO Zhi-quan. Optimized iterative clipping and filtering for PAPR reduction of OFDM signals[J]. IEEE Transactions on Communications, 2011, 59(1):33-37. |
| [16] | AGGARWAL A, MENG T H. Minimizing the peak-toaverage power ratio of OFDM signals using convex optimization[J]. IEEE Transactions on Signal Processing, 2006, 54(8):3099-3110. |
