Performance Evaluation with Improved Receiver Design for Asynchronous Coordinated Multipoint Transmi

来源 :Chinese Journal of Electronics | 被引量 : 0次 | 上传用户:tzt333333
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Joint transmission is one of the ma jor transmission schemes in Coordinated multipoint(Co MP)transmission/reception systems for Long term evolutionadvanced(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 Co MP 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) Co MP systems. Simulation results show that the per-subband global precoding scheme widely used in the Co MP 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. Due to the different transmission 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 the reception of the UE on multi-cell downlink joint transmission systems using our LTE-based Co MP simulator. Shen, due to asynchronous reception, we propose an improved reception strategy to mitigate the interference which compensate for Rx timing difference on Joint Transmission (JT) Co MP systems. Simulation results show that the per-subband global precoding scheme widely used in the Co MP system is considerably sensitive to the reception since the performance is dominated by the subcarrier used for precoding vector calculation. It is verified that our proposed solutio n is able to achieve significant improvements under asynchronous reception.
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