一種自適應調(diào)制v-blast系統(tǒng)的功率受限分配算法.doc
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一種自適應調(diào)制v-blast系統(tǒng)的功率受限分配算法,一種自適應調(diào)制v-blast系統(tǒng)的功率受限分配算法全文3000字論述翔實摘要: 提出了一種自適應調(diào)制垂直－貝爾實驗室分層空時結(jié)構(gòu)（v-blast）系統(tǒng)的低復雜度比特、功率分配算法，滿足總平均功率和單根發(fā)射天線峰值功率受限條件下使比特率最大化。該算法可以達到與比特遞增分配算法相同的最優(yōu)分配結(jié)果，而計算量大幅度降低。仿真結(jié)...
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一種自適應調(diào)制V-BLAST系統(tǒng)的功率受限分配算法
全文3000字 論述翔實
摘要: 提出了一種自適應調(diào)制垂直－貝爾實驗室分層空時結(jié)構(gòu)（V-BLAST）系統(tǒng)的低復雜度比特、功率分配算法，滿足總平均功率和單根發(fā)射天線峰值功率受限條件下使比特率最大化。該算法可以達到與比特遞增分配算法相同的最優(yōu)分配結(jié)果，而計算量大幅度降低。仿真結(jié)果表明，在滿足目標誤碼率條件下單天線功率限制會使比特率降低。
關 鍵 詞: 垂直－貝爾實驗室分層空時結(jié)構(gòu),自適應調(diào)制,分配算法,功率受限
A Loading Algorithm with Power Constraints in Adaptive Modulation for V-BLAST Systems
SONG Yang1, CHANG Yong-yu1, ZHANG Xin1,2, YANG Da-cheng1
(1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2. State Key Laboratory of Mobile Communications, Southeast University, Nanjing 210096, China)
Abstract: A bit loading and power allocation algorithm with low complexity in adaptive modulation for vertical-Bell laboratory layered space-time systems was proposed to implement the rate maximization, satisfying peak power constraint on each antenna as well as the average total power limit. The proposed algorithm is of the same optimal allocation as the incremental algorithm while the computation complexity declines significantly. The simulation results show that the limitation of per-antenna peak power will decrease the bit rate under the target bit error rate.
Key words: vertical-Bell laboratory layered space-time; adaptive modulation; loading algorithm; power constraint
圖3 誤碼率性能
圖4 系統(tǒng)比特率
圖5 總平均功率分布
參考文獻:
[1] 張平. Beyond 3G移動通信系統(tǒng)關鍵技術(shù)[J]. 北京郵電大學學報, 2002, 25(3): 1-6.
Zhang Ping. Some research issues for beyond 3G mobile systems[J]. Journal of Beijing University of Posts and Telecommunications, 2002, 25(3): 1-6.
[2] Kim Y D, Kim I, Choi J, et al. Adaptive modulation for MIMO systems with V-BLAST detection[C]// VTC 2003-Spring. Jeju:[s.n.], 2003: 1074-1078.
[3] Choi W J, Cheong K W, Cioffi J M. Adaptive modulation with limited peak power for fading channels[C]// VTC 2000-Spring. Tokyo: IEEE Press , 2000: 2568-2572.
[4] Krongold B S, Ramchandran K, Jones D L. Computationally efficient optimal power allocation algorithms for multicarrier communication systems[J]. IEEE Trans on Commun, 2000, 48: 23-27.
[5] Wyglinski A M，Labeau F，Kabal P. An efficient bit allocation algorithm for multicarrier modulation[C]// WCNC 2004. Atlanta: GA, 2004: 1194-1199.
[6] 陶小峰, 秦海燕, 溫蕾,等. 頻率選擇性信道下V-BLAST信道矩陣的建模[J]. 北京郵電大學學報, 2004, 27(2): 84-87.
Tao Xiaofeng, Qin Haiyan, Wen Lei, et al. Channel modeling of layered space-time code under frequency-selective fading channel[J]. Journal of Beijing University of Posts and Telecommunications, 2004, 27(2): 84-87.
[7] Nam S H, Shin O S, Lee K B. Transmit power allocation for a modified V-BLAST system[J]. IEEE Trans on Commun, 2004, 52(7): 1074-1079.
全文3000字 論述翔實
摘要: 提出了一種自適應調(diào)制垂直－貝爾實驗室分層空時結(jié)構(gòu)（V-BLAST）系統(tǒng)的低復雜度比特、功率分配算法，滿足總平均功率和單根發(fā)射天線峰值功率受限條件下使比特率最大化。該算法可以達到與比特遞增分配算法相同的最優(yōu)分配結(jié)果，而計算量大幅度降低。仿真結(jié)果表明，在滿足目標誤碼率條件下單天線功率限制會使比特率降低。
關 鍵 詞: 垂直－貝爾實驗室分層空時結(jié)構(gòu),自適應調(diào)制,分配算法,功率受限
A Loading Algorithm with Power Constraints in Adaptive Modulation for V-BLAST Systems
SONG Yang1, CHANG Yong-yu1, ZHANG Xin1,2, YANG Da-cheng1
(1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2. State Key Laboratory of Mobile Communications, Southeast University, Nanjing 210096, China)
Abstract: A bit loading and power allocation algorithm with low complexity in adaptive modulation for vertical-Bell laboratory layered space-time systems was proposed to implement the rate maximization, satisfying peak power constraint on each antenna as well as the average total power limit. The proposed algorithm is of the same optimal allocation as the incremental algorithm while the computation complexity declines significantly. The simulation results show that the limitation of per-antenna peak power will decrease the bit rate under the target bit error rate.
Key words: vertical-Bell laboratory layered space-time; adaptive modulation; loading algorithm; power constraint
圖3 誤碼率性能
圖4 系統(tǒng)比特率
圖5 總平均功率分布
參考文獻:
[1] 張平. Beyond 3G移動通信系統(tǒng)關鍵技術(shù)[J]. 北京郵電大學學報, 2002, 25(3): 1-6.
Zhang Ping. Some research issues for beyond 3G mobile systems[J]. Journal of Beijing University of Posts and Telecommunications, 2002, 25(3): 1-6.
[2] Kim Y D, Kim I, Choi J, et al. Adaptive modulation for MIMO systems with V-BLAST detection[C]// VTC 2003-Spring. Jeju:[s.n.], 2003: 1074-1078.
[3] Choi W J, Cheong K W, Cioffi J M. Adaptive modulation with limited peak power for fading channels[C]// VTC 2000-Spring. Tokyo: IEEE Press , 2000: 2568-2572.
[4] Krongold B S, Ramchandran K, Jones D L. Computationally efficient optimal power allocation algorithms for multicarrier communication systems[J]. IEEE Trans on Commun, 2000, 48: 23-27.
[5] Wyglinski A M，Labeau F，Kabal P. An efficient bit allocation algorithm for multicarrier modulation[C]// WCNC 2004. Atlanta: GA, 2004: 1194-1199.
[6] 陶小峰, 秦海燕, 溫蕾,等. 頻率選擇性信道下V-BLAST信道矩陣的建模[J]. 北京郵電大學學報, 2004, 27(2): 84-87.
Tao Xiaofeng, Qin Haiyan, Wen Lei, et al. Channel modeling of layered space-time code under frequency-selective fading channel[J]. Journal of Beijing University of Posts and Telecommunications, 2004, 27(2): 84-87.
[7] Nam S H, Shin O S, Lee K B. Transmit power allocation for a modified V-BLAST system[J]. IEEE Trans on Commun, 2004, 52(7): 1074-1079.
