机构地区: 华南理工大学电子与信息学院
出 处: 《通信技术》 2003年第8期60-62,共3页
摘 要: 联合检测是TD-SCDMA的关键技术之一。传统的联合检测技术虽然得到很好的性能,但复杂度高。提出一种快速算法,将联合检测的系统矩阵扩展成块循环矩阵,利用块FFT和块循环矩阵进行快速矩阵求逆和简化矩阵运算。矩阵求逆的运算量最大可下降到O(nlog2n),且存储量成倍下降。仿真实验表明,该算法和直接计算得到的系统性能一致,但运算时间大大下降。 Joint Detection is one of key techniq ues for TD-SCDMA.JD can achieve b etter performance while bring huge computational load.This artic le researches a fast algorithm which extends the system matrix of JD into b lock circulant ma-trix,then uses block Fourier transform and block circulant matrix to perform matrix inversion and operation s.The minimal com-putation can be O(nlog 2 n)and the required memory descends in g emination.Through simulations,th e performance of the fast algorithm is the same as the exac t algorithm,while t he computational time is sharply decreased.