مخابره مطمئن بی‌سیم بر مبنای وضعیت لینک غیر ایده‌آل با استفاده از ترکیب بهینه AMC و ARQ
الموضوعات :مهرداد تاکي 1 , رضا مهین زعیم 2
1 - دانشگاه قم
2 - دانشگاه اصفهان
الکلمات المفتاحية: تطبیق لینک گسسته کدینگ و مدولاسیون وفقی (AMC) بازارسال خودکار (ARQ) مخابره مطمئن,
ملخص المقالة :
در این مقاله روشی برای مخابره مطمئن اطلاعات (با احتمال خطای متمایل به صفر) در یک لینک مخابراتی بی‌سیم ارائه می‌شود که در آن برای مقابله با اثرات فیدینگ و چندمسیرگی از کدینگ و مدولاسیون وفقی (AMC) استفاده شده است. با استفاده از روش‌های کدینگ متداول حد کمی از احتمال خطا در سیستم باقی می‌ماند که به صفر رساندن آن مستلزم استفاده از توان ارسالی بسیار زیاد و یا کلمات کد به طول بی‌نهایت است و در عمل ممکن نیست. وظیفه از بین بردن میزان خطای باقیمانده بر عهده سیستم بازارسال خودکار (ARQ) است. البته اگر کدینگ تصحیح خطای مورد استفاده ضعیف باشد تعداد بازارسال‌های مورد نیاز زیاد خواهد بود و این امر گذردهی سیستم را به شدت خراب می‌کند. در این مقاله روشی برای ترکیب بهینه روش تصحیح خطا در تطبیق لینک و روش تشخیص خطا و بازارسال ارائه می‌شود. از طرف دیگر به علت متغیر با زمان بودن کانال‌ها و خطاهای تخمین و چندی‌سازی (Quantization)، در عمل وضعیت دقیق لینک برای تنظیم نرخ ارسال در اختیار نیست. در این مقاله، روش جدیدی برای تطبیق لینک بر مبنای وضعیت لینک غیر ایده‌آل نیز ارائه می‌شود. بررسی‌های عددی کارامدی روش طراحی‌شده را نشان می‌دهند.
[1] S. T. Chung and A. J. Goldsmith, "Degrees of freedom in adaptive modulation: a unified view," IEEE Trans. Commun., vol. 49, no. 9, pp. 1561-1571, Sep. 2001.
[2] K. J. Hole, H. Holm, and G. E. Øien, "Adaptive multidimensional coded modulation over flat fading channels," IEEE J. Select. Areas Commun., vol. 18, no. 7, pp. 1153-1158, Jul. 2000.
[3] N. C. Beaulieu, G. Farhadi, and Y. Chen, "Amplify-and-forward multihop relaying with adaptive M-QAM in Nakagami-m fading," in Proc. IEEE Global Telecommunication Conf., 5-9 Dec. 2011.
[4] A. Gjendemsjo, H. C. Yang, M. S. Alouini, and G. Oien, "Rate and power allocation for discrete-rate link adaptation," EURASIP J. Wireless Commun. Netw., Article ID 394124, 11 pp., 2008
[5] J. Tang and X. Zhang, "Quality-of-service driven power and rate adaptation over wireless links," IEEE Trans. on Wireless Communications, vol. 6, no. 8, pp. 3058-3068, Aug. 2007.
[6] B. C. Modi, O. Olabiyi, and A. Annamalai, "Improving the spectral efficiency of adaptive modulation in amplify-and-forward cooperative relay networks with truncated ARQ protocol," in Proc. IEEE Global Telecommunications Conf., GLOBECOM'11, 5-9 Dec. 2011.
[7] W. L. Li, Y. J. Zhang, A. C. So, and M. Win, "Slow adaptive OFDMA systems through chance constrained programming," IEEE Trans. Signal Process., vol. 58, no. 7, pp. 3858-3869, Jul. 2010.
[8] L. Toni and A. Conti, "Does fast adaptive modulation always outperform slow adaptive modulation," IEEE Trans. Wireless Commun., vol. 10, no. 5, pp. 1504-1513, May 2011.
[9] M. Taki, M. Rezaiee, and M. Guillaud, "Adaptive modulation and coding for interference alignment with imperfect CSIT," IEEE Trans. on Wireless Communications, vol. 13, no. 9, pp. 5264-5273, 2014.
[10] M. Taki and M. Sadeghi, "Joint relay selection and adaption of modulation, coding and transmit power for spectral efficiency optimization in amplify-forward relay network," IET Communications, vol. 8, no. 11, pp. 1955-1964, 2014.
[11] م. تاكي، "بهينه سازي گذردهي در شبکه پخش با حفظ محرمانگي اطلاعات اختصاصي هر گيرنده با استفاده از کدينگ، مدولاسيون و توان ارسالی وفقي"، نشريه مهندسي برق و مهندسي كامپيوتر ايران، ب- مهندسي كامپيوتر، سال 12، شماره 1، صص. 66-60، زمستان 1395.
[12] M. Taki, "Spectral efficiency optimization in amplify and forward relay network with diversity using adaptive rate and adaptive power transmission," IET Trans. on Communications, vol. 7, no. 15, pp. 1656-1664, 2013.
[13] M. Taki and F. Lahouti, "Spectral efficiency optimization for an interfering cognitive radio with adaptive modulation and coding," in Proc. Int. Conf.e on Communications Workshops, 14-18 Jun. 20091.
[14] Y. Yao and G. B. Giannakis, "Rate-maximizing power allocation in ofdm based on partial channel knowledge," IEEE Trans. Wireless Commun., vol. 4, no. 3, pp. 1073-1083, May 2005.
[15] M. R. Souryal and R. L. Pickholtz, "Adaptive modulation with imperfect channel information in OFDM," in Proc. ICC, pp. 1861-1865, Jun. 2001.
[16] Geir Egil Øien, H. Holm, and Kjell Jørgen Hole, "Impact of channel prediction on adaptive coded modulation performance in rayleigh fading," IEEE Trans. Veh. Technol., vol. 53, no. 3, pp. 758-769, May 2004.
[17] A. Olfat and M. Shikh-Bahaei, "Optimum power and rate adaptation for MQAM in Rayleigh flat fading with imperfect channel estimation," IEEE Trans. Veh. Technol., vol. 57, no. 4, pp. 2622-2627, Jul. 2008.
[18] S. Ye, R. S. Blum, and L. J. Cimini, "Adaptive OFDM systems with imperfect channel state information," IEEE Trans. Wireless Commun., vol. 5, no. 11, pp. 3255-3265, Nov. 2006.
[19] Z. Song, K. Zhang, and Y. L. Guan, "Statistical adaptive modulation for QAM-OFDM systems," in Proc. GLOBECOM, vol. 1, pp. 706-710, Nov. 2002.
[20] H. Zhang, S. Wei, G. Ananthaswamy, and D. L. Goeckel, "Adaptive signaling based on statistical characterizations of outdated feedback in wireless communications," Proceedings of the IEEEvol. 85, no. 12, pp. 2337-2353, Dec. 2007.
[21] J. F. Paris and A. J. Goldsmith, "Adaptive modulation for MIMO multiplexing under average BER constraints and imperfect CSI," IEEE Int. Conf. on Communications, pp. 1318-1325, Jun. 2006.
[22] Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, IEEE Std. 802.11a-1999, 1999.
[23] Digital Video Broadcasting (DVB) Second Generation Framing Structure for Broadband Satellite Applications, EN 302 307 V1.1.1, 2005.
[24] E. Malkamaki and H. Leib, "Performance of truncated type-II hybrid ARQ schemes with noisy feedback over block fading channels," IEEE Trans. Commun., vol. 48, no. 9, pp. 1477-1487, Sep. 2000.
[25] J. Yun, "Throughput analysis of selective repeat ARQ combined with adaptive modulation for fading channels," in Proc. IEEE MILCOM, vol. 1, pp. 710-714, 7-10 Oct. 2002.
[26] J. Yun and M. Kavehrad, "Markov error structure for throughput analysis of adaptive modulation systems combined with ARQ over correlated fading channels," IEEE Trans. on Veh. Technology, vol. 56, no. 2, pp. 235-245, Jan. 2005.
[27] L. B. Le, E. Hossain, and A. S. Alfa, "Delay statistics and throughput performance for multi-rate wireless networks under multiuser diversity," IEEE Trans. Wireless Commun.,vol. 5, no. 11, pp. 3234-3243, Nov. 2006.
[28] S. Falahati and A. Svensson, "Hybrid type-II ARQ schemes with adaptive modulation systems for wireless channels," in Proc. IEEE VTC'99, vol. 5, pp. 2691-2695, 19-22 Sept. 1999.
[29] D. Wu and S. Ci, "Cross-layer combination of hybrid ARQ and adaptive modulation and coding for QoS provisioning in wireless data networks," in Proc. 3rd Int'l Conf. Quality of Service in Heterogeneous Wired/Wireless Networks, Article ID. 47, 7-9 Aug. 2006.
[30] Q. Liu, S. Zhou, and G. B. Giannakis, "Cross-layer combining of adaptive modulation and coding with truncated ARQ over wireless links," IEEE Trans. Wireless Commun., vol. 3, no. 5, pp. 1746-55, Sep. 2004.
[31] J. S. Harsini and F. Lahouti, "Joint optimization of adaptive modulation and coding, power control and packet retransmission over block fading channels," in Proc. IEEE Information Theory Workshoppp. Bergen, Norway, 1-6 Jul. 2007.
[32] D. Wu, S. Ci, and H. Wang, "Cross-layer optimization for video summary transmission over wireless networks," IEEE J. Select. Areas Commun., vol. 25, no. 4, pp. 841-850, May 2007.
[33] H. Zheng and H. Viswanathan, "Optimizing the ARQ performance in downlink packet data systems with scheduling," IEEE Trans. Commun., vol. 4, no. 2, pp. 495-506, Mar. 2005.
[34] J. S. Harsini and F. Lahouti, "Quality of service constrained throughput optimization for joint adaptive transmission with ARQ over block-fading channels," IET Communications, vol. 6, no. 3, pp. 1030-1040, Jul. 2009.
[35] T. Zhou, X. Yu, Y. Li, and Y Jiao, "Cross-layer design with feedback delayover MIMO Nakagami-m fading channels," in Proc. 12th IEEE Int. Conf. on Communication Technology, ICCT'10, pp. 359-366, 11-14 Nov. 2010.
[36] I. S. Gradshicyn and I. M. Ryzbik, Table of Integrals, Series and Products, Academic Press, Inc., 1996.
[37] M. K. Simon and M. S. Alouini, "Exponential-type bounds on the generalized marcum Q-function with application to error probability analysis over fading channels," IEEE Trans. Wireless Commun., vol. 48, no. 3, pp. 359-366, Mar. 2000.
[38] J. Nocedal and S. J. Wright, Numerical Optimization, 2nd Ed. Springer, 2006.
