TD-SCDMA系统中GSM互调干扰抑制算法

摘要

For the inter-modulation interference generated by GSM1800 system in TD-SCDMA system,the associated sideband replacement method is introduced between the two systems to suppress interference.Without affecting the communication quality of TD-SCDMA system,a coexistence of TD-SCDMA system with GSM system has been improved.In the limited space,frequency domain symmetry of QPSK modulation using associated sideband replacement method to suppress inter-modulation interference between GSM1800 system and TD-SCDMA system is exploited as the core idea.Theoretical analysis and simulation results show that TD-SCDMA system coexistence with GSM system is improved effectively.%针对TD-SCDMA系统中GSM 1800系统产生的互调干扰,将边带相关置换方法引入互调干扰抑制算法中.以不影响TD-SCDMA系统通信质量为前提,在有限空间内提出一种以边带相关置换方法为基础的抑制两系统间互调干扰的算法.其核心思想是利用TD-SCDMA系统QPSK调制的频域对称性,通过边带相关置换方法对系统中的互调干扰进行有效抑制,以提高TD-SCDMA系统与GSM系统的共存性.理论分析和仿真结果表明:该方法在保证TD-SCDMA系统可靠性的基础上,有效地提高了两系统间的共存性.