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    • 3. 发明授权
    • DTX detection method with high success probability
    • DTX检测方法成功率高
    • US07418063B2
    • 2008-08-26
    • US10002722
    • 2001-11-16
    • Dayong ChenLeonard Lee
    • Dayong ChenLeonard Lee
    • H03D1/00H04L27/06
    • H04B7/2656
    • A wireless communications system receiver classifies a received burst as a DTX-high state normal burst or a DTX-low state truncated burst with a high probability of success. D1, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a normal burst, is determined by calculating a confidence-weighted correlation between the two bit patterns. In a high-noise environment, D2, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a truncated burst, is calculated. The ratio D1/D2 is compared to a threshold to classify the DTX state of the received burst. D1 and D2 may be normalized by dividing by the maximum average RSSI over the received burst, plotted on a graph of normalized D1 vs. normalized D2, and compared to a predetermined thresholding function that minimizes the probability of false classification. The thresholding function may be a piece-wise linear curve.
    • 无线通信系统接收机将接收到的突发分类为具有高成功概率的DTX高状态正常突发或DTX低状态截断突发。 D1,通过计算两个比特模式之间的置信度加权相关性来确定已知CDVCC与正常突发中CDVCC的比特位置之间的欧几里德距离。 在高噪声环境中,D2计算已知CDVCC与截断脉冲串中CDVCC位位置之间的欧几里德距离。 将比率D1 / D2与阈值进行比较,以对接收的脉冲串的DTX状态进行分类。 D1和D2可以通过除以接收脉冲串上的最大平均RSSI而被归一化,其绘制在归一化D1与标准化D2的图上,并与将误分类概率最小化的预定阈值函数进行比较。 阈值函数可以是分段线性曲线。