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首页> 外文期刊>Chinese Journal of Electronics >Performance Evaluation with Improved Receiver Design for Asynchronous Coordinated Multipoint Transmissions
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Performance Evaluation with Improved Receiver Design for Asynchronous Coordinated Multipoint Transmissions

机译：改进的接收机设计用于异步协调多点传输的性能评估

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摘要

Joint transmission is one of the major transmission schemes in Coordinated multipoint (CoMP) transmission/reception systems for Long term evolution-advanced (LTE-A). Due to different distances between User equipments (UE) and Base stations (BS), signals are not able to arrive at the receiver with perfect synchronization, which implies that the reception at UE is asynchronous. This paper presents an evaluation on asynchronous UE reception in multi-cell downlink joint transmission systems using our LTE-based CoMP simulator. Then, due to asynchronous reception, we propose an improved reception strategy to mitigate the interference which compensate for Rx timing difference on Joint transmission (JT) CoMP systems. Simulation results show that the per-subband global precoding scheme widely used in the CoMP system is considerably sensitive to asynchronous reception since the performance is dominated by the subcarrier used for precoding vector calculation. It is verified that our proposed solution is able to achieve significant improvements under asynchronous reception.
机译：联合传输是高级长期演进（LTE-A）的多点协作（CoMP）传输/接收系统中的主要传输方案之一。由于用户设备（UE）和基站（BS）之间的距离不同，信号无法以完美的同步到达接收器，这意味着UE的接收是异步的。本文使用基于LTE的CoMP模拟器对多小区下行链路联合传输系统中的异步UE接收进行了评估。然后，由于异步接收，我们提出了一种改进的接收策略来减轻干扰，以补偿联合传输（JT）CoMP系统上的Rx时序差异。仿真结果表明，在CoMP系统中广泛使用的每个子带全局预编码方案对异步接收相当敏感，因为性能受用于预编码矢量计算的子载波支配。可以证明，我们提出的解决方案能够在异步接收下实现显着改进。

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