| LTE下行MIMO模式自适应切换算法 |
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| 引用本文： | 赵谦,叶秀斌. LTE下行MIMO模式自适应切换算法[J]. 数据采集与处理, 2012, 27(4): 462-468 |
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| 作者姓名： | 赵谦 叶秀斌 |
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| 作者单位： | 1. 西安科技大学通信与信息工程学院,西安,710054
2. 厦门大学嘉庚学院电子工程系,漳州,363105 |
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| 基金项目： | 陕西省科技厅工业攻关，陕西省教育厅专项科研计划，西安市科技计划工业应用技术研发，西安市科技计划产业技术创新计划-技术转移促进工程，西安市碑林区应用技术研发 |
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| 摘 要： | 由于用户在各种不同场景下采用不同的MIMO模式可以达到不同的传输效果,为了使用户达到平均吞吐量和频谱效率的最佳要求,提高系统传输率,研究了TDD LTE系统下行MIMO模式切换技术。搭建TDD LTE下行业务控制信道PDSCH仿真平台,对MIMO传输模式进行仿真实验,通过比较不同模式下的误码率和吞吐量的仿真结果,确定切换门限,提出MIMO模式自适应切换算法。在实际应用中,根据这种算法自适应地配置适合的MIMO技术,可以最大限度的提高系统频谱利用率,此方法优于单独采用一种MIMO技术达到的传输效率。
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| 关 键 词： | 多输入多输出 波束赋形 发射分集 空间复用 |
Adaptive Switching Algorithm of LTE Downlink MIMO Modes |
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| Zhao Qian , Ye Xiubin. Adaptive Switching Algorithm of LTE Downlink MIMO Modes[J]. Journal of Data Acquisition & Processing, 2012, 27(4): 462-468 |
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| Authors: | Zhao Qian Ye Xiubin |
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| Affiliation: | 1.School of Communication and Information Engineering,Xi’an University of Science and Technology,Xi’an,710054,China;2.Tan Kah Kee College,Xiamen University,Zhangzhou,363105,China) |
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| Abstract: | It is known that choosing the appropriate MIMO modes in varied situations can achieve better transmission effects.The switch technology of MIMO modes in TDD long term evolution(LTE) downlink are investigated for reaching the best average throughput as well as spectrum efficiency,and for enhancing the transmission rate of the system.The PDSCH simulation platform of TDD LTE downlink control channel is built to simulate the MIMO transmission modes.By comparing the simulated results of bit error rate and throughput in different modes,the switch threshold is determined and an adaptive algorithm of switching MIMO modes is proposed.In practical application,matching adaptive MIMO technology according to the algorithm can maximize the spectral efficiency of the system.The transmission efficiency of the proposed method is superior to that of using one single MIMO technology. |
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| Keywords: | MIMO beamforming transmit diversity spatial multiplexing |
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