Electrical balance duplexer adaptation in indoor mobile scenarios
Electrical balance duplexer adaptation in indoor mobile scenarios
复制标题
室内移动场景下的电平衡双工器适配
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Haine
中科院分区：
文献类型：
--
作者：
L. Laughlin;M. Beach;K. Morris;J. Haine
影响电平衡（EB）天线收发（TXRX）隔离的关键问题是平衡网络对天线阻抗的动态匹配。包括嵌入式天线测量的电路仿真已被用于研究由于设备运动而引起的TX-RX隔离的变化，并研究操作环境、设备速度和天线自适应特性对TX-RX隔离的影响。结果表明，增加的速度和增加的反射情况下，需要增加的调制解调器的适应率，以保持TX-RX隔离接近其最大值。然而，尽管与环境交互，在该操作场景中，模拟的WLAN在没有平衡网络适配的情况下保持> 45 dB的TX-RX隔离，并且在10 ms的平衡网络适配间隔的情况下保持> 52 dB。
A key issue impacting the transmit to receive (TXRX) isolation in Electrical Balance (EB) duplexers is dynamic matching of the antenna impedance by the balancing network. Circuit simulations including embedded antenna measurements have been used to investigate the variation in TX-RX isolation due to device motion, and to study the effect of the operational environment, device speed, and the duplexer adaptation characteristics on the TX-RX isolation. Results show that the increased speed and increased reflection scenarios necessitate increased duplexer adaptation rates in order to maintain TX-RX isolation close to its maximised value. However, despite interaction with the environment, in this operating scenario the simulated duplexer maintained >45dB of TX-RX isolation with no balancing network adaptation, and >52dB with a balancing network adaptation interval of 10ms.