文章从分析MCMA算法的原理出发,研究了其在信道均衡技术上的应用,重点阐述了通过Matlab仿真和Xilinx System Generator for DSP开发软件在FPGA上实现基于MCMA算法的盲均衡器的方法。从硬件协同仿真结果可以看出,实现的盲信道均衡器能够...文章从分析MCMA算法的原理出发,研究了其在信道均衡技术上的应用,重点阐述了通过Matlab仿真和Xilinx System Generator for DSP开发软件在FPGA上实现基于MCMA算法的盲均衡器的方法。从硬件协同仿真结果可以看出,实现的盲信道均衡器能够达到消除码间干扰的效果。展开更多
This paper investigates adaptive blind source separation and equalization for Multiple Input Multiple Output (MIMO) systems. To effectively recover input signals, remove Inter-Symbol Interference (ISI) and suppress In...This paper investigates adaptive blind source separation and equalization for Multiple Input Multiple Output (MIMO) systems. To effectively recover input signals, remove Inter-Symbol Interference (ISI) and suppress Inter-User Interference (IUI), the array input is first transformed into the signal subspace, then with the derived orthogonality between weight vectors of different input signals, a new orthogonal Constant Modulus Algorithm (CMA) is proposed. Computer simulation results illustrate the promising performance of the proposed method. Without channel identification, the proposed method can recover all the system inputs simultaneously and can be adaptive to channel changes without prior knowledge about signals.展开更多
This paper presents an improved error function of dithered signed-error constant modulus algorithm （IDSE-CMA） for blind multiuser interference suppression in DS/CDMA systems. It uses a different error function to re...This paper presents an improved error function of dithered signed-error constant modulus algorithm （IDSE-CMA） for blind multiuser interference suppression in DS/CDMA systems. It uses a different error function to replace the former one in sign operation of the DSE-CMA and compares their performance in multiple access interference （MAI） suppression ability. Simulations indicate that the new algorithm has better performance than the similar CMA in terms of convergence speed and steady-state performance：展开更多
为了改善存在差分群时延(Differential group delay,DGD)情况下模式复用系统的解复用性能,采用基于恒模算法(Constant modulus algorithm,CMA)的MIMO均衡器对2×2模式复用系统的输出信号进行了解复用,利用CMA更新迭代MIMO均衡器的...为了改善存在差分群时延(Differential group delay,DGD)情况下模式复用系统的解复用性能,采用基于恒模算法(Constant modulus algorithm,CMA)的MIMO均衡器对2×2模式复用系统的输出信号进行了解复用,利用CMA更新迭代MIMO均衡器的抽头系数。仿真结果表明,该算法能够成功实现带有串扰和时延的信号解复用,并且具有很好的收敛性。在系统信噪比大于18.25 d B时,系统误码率均能达到10-5量级,满足通信系统的要求。展开更多
文摘This paper investigates adaptive blind source separation and equalization for Multiple Input Multiple Output (MIMO) systems. To effectively recover input signals, remove Inter-Symbol Interference (ISI) and suppress Inter-User Interference (IUI), the array input is first transformed into the signal subspace, then with the derived orthogonality between weight vectors of different input signals, a new orthogonal Constant Modulus Algorithm (CMA) is proposed. Computer simulation results illustrate the promising performance of the proposed method. Without channel identification, the proposed method can recover all the system inputs simultaneously and can be adaptive to channel changes without prior knowledge about signals.
基金Project supported by National Natural Science Foundation of Chi-na(Grant No .60172018)
文摘This paper presents an improved error function of dithered signed-error constant modulus algorithm （IDSE-CMA） for blind multiuser interference suppression in DS/CDMA systems. It uses a different error function to replace the former one in sign operation of the DSE-CMA and compares their performance in multiple access interference （MAI） suppression ability. Simulations indicate that the new algorithm has better performance than the similar CMA in terms of convergence speed and steady-state performance：
文摘为了改善存在差分群时延(Differential group delay,DGD)情况下模式复用系统的解复用性能,采用基于恒模算法(Constant modulus algorithm,CMA)的MIMO均衡器对2×2模式复用系统的输出信号进行了解复用,利用CMA更新迭代MIMO均衡器的抽头系数。仿真结果表明,该算法能够成功实现带有串扰和时延的信号解复用,并且具有很好的收敛性。在系统信噪比大于18.25 d B时,系统误码率均能达到10-5量级,满足通信系统的要求。
