基于動態(tài)反饋與功率分配的干擾對齊方法
doi: 10.11999/JEIT170505
基金項目:
國家自然科學基金青年基金(61601519),山東省自然科學基金(ZR2014FM017, ZR2016FL02),中央高?;究蒲袠I(yè)務(wù)費專項資金資助項目(18CX02134A, 18CX02137A)
Novel Interference Alignment Scheme Based on Dynamic Feedback and Power Allocation
Funds:
The National Natural Science Foundation of China (61601519), The Shandong Provincial Natural Science Foundation (ZR2014FM017, ZR2016FL02), The Fundamental Research Funds for the Central Universities (18CX02134A, 18CX02137A)
-
摘要: 在多用戶MIMO系統(tǒng)中,信道狀態(tài)的精確性嚴重影響干擾對齊技術(shù)的性能。該文針對信道狀態(tài)信息(CSI)有限反饋導(dǎo)致的干擾泄露問題,提出一種基于動態(tài)反饋與功率分配的干擾對齊方法。首先從理論上分析了系統(tǒng)和速率與信道狀態(tài)反饋比特分配和功率分配之間的關(guān)系,得到了在動態(tài)反饋和功率分配條件下系統(tǒng)和速率的解析表達式;在此基礎(chǔ)上,以系統(tǒng)容量提升為目標,對反饋比特分配和功率分配優(yōu)化問題進行建模;并根據(jù)信道的準靜態(tài)特性利用庫恩塔克條件(KKT)對該問題進行求解,得到功率和反饋比特分配方案。仿真結(jié)果表明,與單獨考慮信道狀態(tài)動態(tài)反饋條件下的干擾對齊技術(shù)相比,提出的方法能夠有效減少干擾泄漏強度,提高系統(tǒng)和速率。Abstract: In multi-user MIMO systems, the accuracy of the Channel State Information (CSI) has a sufficient effect on performance of interference alignment scheme. To solve the problem of interference leakage caused by limited feedback of CSI, a novel method for interference alignment based on dynamic feedback and power allocation is proposed. First, the relationship between system sum rate and the allocation for channel state feedback bits and transmitting power is analyzed theoretically, and the formula of sum rate of the system considering dynamic feedback and power allocation is derived. Based on the above analysis, the model of optimizing allocation for feedback bits and power problem is set to improve the throughput of system. Then, a low-complexity solution to the problem is raised on the basis of channel quasi-static characteristic, and the feedback bit and power allocation scheme are obtained by the Karush-Kuhn-Tucker (KKT) condition. Simulation results show that the proposed method can effectively reduce the interference leakage and improve the system sum rate compared with the interference alignment scheme that just dynamically feedbacks channel state.
-
Key words:
- MIMO /
- Interference alignment /
- Limited feedback /
- Dynamic feedback /
- Power allocation
-
CADAMBE V R and JAFAR S A. Interference alignment and degrees of freedom of the K-user interference channel[J]. IEEE Transactions on Information Theory, 2008, 54(8): 3425-3441. doi: 10.1109/TIT.2008.926344. GOMADAM K, CADAMBE V R, and JAFAR S A. A distributed numerical approach to interference alignment and applications to wireless interference networks[J]. IEEE Transactions on Information Theory, 2011, 57(6): 3309-3322. doi: 10.1109/TIT.2011.2142270. PETERS S W and HEATH R W. Cooperative algorithms for MIMO interference channels[J]. IEEE Transactions on Vehicular Technology, 2011, 60(1): 206-218. doi: 10.1109/ TVT.2010.2085459. 李寧, 王思文, 翟立君, 等. 一種加權(quán)均方誤差最小化的魯棒性干擾對齊算法[J]. 電子與信息學報, 2016, 38(3): 643-648. doi: 10.11999/JEIT150648. LI Ning, Wang Siwen, ZHAI Lijun, et al. Compensating Method of L-band Radar ISAR Imaging for Ionosphereic Target with High-velocity[J]. Journal of Electronics Information Technology, 2016, 38(3): 643-648. doi: 10.11999/ JEIT150648. LOVE D J, HEATH R W, LAU V K N, et al. An overview of limited feedback in wireless communication systems[J]. IEEE Journal on Selected Areas in Communications, 2008, 26(8): 1341-1365. doi: 10.1109/TVT.2010.2085459. THUKRAL J and BOLCSKEI H. Interference alignment with limited feedback[C]. IEEE International Symposium on Information Theory. Seoul, 2009: 1759-1763. doi: 10.1109/ ISIT.2009.5205266 KRISHNAMACHARI R T and VARANASI M K. Interference alignment under limited feedback for MIMO interference channels[J]. IEEE Transactions on Signal Processing, 2013, 61(15): 3908-3917. doi: 10.1109/TSP.2013. 2264055. 章?lián)P, 周正, 石磊, 等. 蜂窩網(wǎng)絡(luò)下行鏈路單反饋干擾對齊算法研究[J]. 電子與信息學報, 2012, 34(12): 2816-2822. doi: 10.3724/SP.J.1146.2012.00583. ZHANG Yang, ZHOU Zheng, SHI Lei, et al. Interference alignment with single feedback for downlink cellular networks[J]. Journal of Electronics Information Technology, 2012, 34(12): 2816-2822. doi: 10.3724/SP.J.1146.2012.00583. PHAM K and LEE K. Interference alignment for multicell multiuser mimo uplink channels[J]. IEEE Transactions on Vehicular Technology, 2016, 65(7): 5146-5159. doi: 10.1109/ TVT.2015.2459381. GAO H, L? T, FANG D, et al. Limited feedback-based interference alignment for interfering multi-access channels[J]. IEEE Communications Letters, 2014, 18(4): 540-543. doi: 10.1109/LCOMM.2014.021214.132762. CHEN X and YUEN C. On interference alignment with imperfect CSI: Characterizations of outage probability, ergodic rate and SER[J]. IEEE Transactions on Vehicular Technology, 2016, 65(1): 47-58. doi: 10.1109/TVT.2015. 2397000. CHO S, HUANG K, KIM D K, et al. Feedback-topology designs for interference alignment in MIMO interference channels[J]. IEEE Transactions on Signal Processing, 2012, 60(12): 6561-6575. doi: 10.1109/TSP.2012.2214214. KIM J S, MOON S H, LEE S R, et al. A new channel quantization strategy for MIMO interference alignment with limited feedback[J]. IEEE Transactions on Wireless Communications, 2012, 11(1): 358-366. doi: 10.1109/TWC. 2011.111211.110810. RAO X, RUAN L, and LAU V K N. Limited feedback design for interference alignment on MIMO interference networks with heterogeneous path loss and spatial correlations[J]. IEEE Transactions on Signal Processing, 2013, 61(10): 2598-2607. doi: 10.1109/TSP.2013.2252168. PANAHI F H, OHTSUKI T, JIANG W, et al. Interference alignment and power allocation for multi-user MIMO interference channels[C]. IEEE International Conference on Communications, Kuala Lumpur, 2016: 1-7. doi: 10.1109/ ICC.2016.7510851. 雷維嘉, 張琴, 謝顯中. 兩單播多跳網(wǎng)絡(luò)的干擾對齊和功率分配方案[J]. 北京郵電大學學報, 2015, 38(3): 71-76. doi: 10.13190/j.jbupt.2015.03.011. LEI Weijia, ZHANG Qin, and XIE Xianzhong. Interference alignment and power allocation algorithm of two unicast multiple hops network[J]. Journal of Beijing University of Posts and Telecommunication, 2015, 38(3): 71-76. doi: 10.13190/j.jbupt.2015.03.011. REZAEE M and GUILLAUD M. Interference alignment with quantized Grassmannian feedback in the K-user constant MIMO interference channel[J]. IEEE Transactions on Wireless Communications, 2016, 15(2): 1456-1468. doi: 10.1109/TWC.2015.2490223. -
計量
- 文章訪問數(shù): 1234
- HTML全文瀏覽量: 140
- PDF下載量: 208
- 被引次數(shù): 0