【摘要】 用最小二乘法在蜂窝小区中形成全覆盖的SwitchedBeam(SB).根据CDMA信号模型和多径信道模型,用最大似然(ML)法估计得到每个用户在每个扇区内加权幅度最大的路径,通过比较这些加权幅度的大小,确定用户的最强路径(主径)所在的扇区,得到下行信号的加权道;通过改变所在扇区的中心位置,使主径加权幅度达到最大可估计用户的来波方向(DOA).算法的运算量小,正确率高.更多还原

【Abstract】 The LeastSquare Algorithm is used to form Switched Beams (SB) which cover whole cell in cellular systems. Based upon the signal model and the multipath channel model of CDMA, the maximum weighted amplitude of each user at each sector is estimated by using Maximum Likelihood estimation method. By comparing the maximum weighted amplitudes of all sectors, the sector of the mainpath of each user is localized and the weight of downlink signal for each user is obtained. Then by changing the center of the sector to reach the maximum weighted amplitude of the mainpath, Directionof Arrival(DOA) of the user also can be estimated. This method has high accuracy with less calculation volume.更多还原