M-WiMAX与WCDMA系统共存问题及M-WiMAX系统子信道分配算法研究

Reduction of adjacent channel interference from M-WiMAX sytem to WCDMA system based on transmit beamforming and the sub-channel allocation in M-WiMAX

讨论了世界微波互用接入(M-WiMAX)系统和宽带扩频多址接入(WCDMA)系统之间的共同存在问题。为了减少M-WiMAX系统对WCDMA系统的干扰,在M-WiMAX的基站端使用了自适应发送端波束成形(Transmit beamforming,TxBF)技术。提出了相应的邻信道干扰模型以分析TxBF技术在降低邻近信道干扰中的增益,以及一种新型的子信道分配方法用来提高M-WiMAX系统的数据吞吐率。为了验证提出的算法,建立了系统层仿真平台并使用蒙特卡罗仿真的方法来验证提出的算法。

The coexistence problem between M-WiMAX and WCDMA systems is discussed. To reduce the interference from M-WiMAX system to WCDMA system, the transmit beamforming technique is applied. At the same time, an adjacent channel interference model is proposed to analyze the gain induced by the application of transmit beamforming technique. In addtion, a novel sub-channel allocation algorithm is Proposed to increase the throughput of M-WiMAX system. To verify the proposed algorithms, a systemlevel simulation platform is built up and evaluated by the Monte Carlo method.