| 摘要: |
| 在802.11ac无线局域网络中,无线智能设备(WID)需通过无线接入点(AP)连接到网络,下行传输过程中其他AP会对目标WID造成干扰.提出采用基于迭代最小化均方误差干扰对齐算法(IMMSE-IA),抑制其他AP对目标WID的干扰.该方法通过对AP端和WID端分别进行线性预编码和后置编码处理,在最小化均方误差准则和功率限制约束下,得到最优预编码和后置编码.仿真结果表明:本方法在信噪比为5 dB情况下,单位带宽传输速率相对于传统最大化信干噪比算法求得的传输速率增加了1 bit/s. |
| 关键词: 802.11ac 无线接入点 线性预编码 后置编码 IMMSE-IA算法 Mas-SINR算法 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(61503251) |
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| Downlink interference suppression of 802.11ac wireless network |
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WANG Huan, LI Li, LING Feng, WANG Fazhan
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College of Information,Mechanical and Electrical Engineering,Shanghai Normal University
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| Abstract: |
| In the 802.11ac wireless local area network,wireless intelligent devices(WID) need to be connected to the network through the wireless access point(AP),and other wireless APs in the downlink transmission process will cause interference to the target WID.In this paper,we propose a method based on iterative minimum mean square error interference alignment,which can suppress the interference from the other wireless APs to the target WIDs.The wireless access terminal and wireless smart devices have designed linear precode and decode respectively.Under the minimum mean square error criterion and limitation the power constraint,optimal precode and decode can be received.Simulation results show that the proposed method,when the signal to noise ratio is 5 dB,the transmission rate of the unit bandwidth transmission rate is increased by 1 bit/s compared with the traditional Max-SINR algorithm. |
| Key words: 802.11ac wireless access point linear precode decode iterative minimum mean square error interference alignment algorithm Max-SINR algorithm |
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