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    • 2. 发明授权
    • Methods and apparatus for adaptive mimic rejection
    • 适应性模拟排斥的方法和装置
    • US06839392B1
    • 2005-01-04
    • US09406030
    • 1999-09-27
    • Mehran BagheriJaime Tadeo MitchellRichard C. Witinski
    • Mehran BagheriJaime Tadeo MitchellRichard C. Witinski
    • H04L1/00H04J3/06H04L7/08H04L7/00
    • H04J3/0608
    • Methods and apparatus for use in aligning frames in a receiver of a data transmission system include checking one or more bit positions associated with a received data stream to determine a number of bits in the bit positions, respectively, that match a predetermined bit pattern. The number for a bit position is compared to a first threshold value and a second threshold value. A bit position is identified as being associated with a false framing pattern or mimic when the number is not less than the first threshold value. A bit position is identified as a potential framing bit position or possible framing bit position when the number is not less than the second threshold value. The first threshold value is changed when a bit position is identified as a potential framing bit position and another bit position is identified as being associated with a false framing pattern. For example, the first threshold value may be increased by a given value for every frame that a bit position is identified as a potential framing bit position and another bit position is identified as being associated with a false framing pattern. The given value may be a value of one, a value less than one, or a value greater than one. Frame alignment is declared when a bit position is identified as a potential framing bit position and no other bit position is identified as being associated with a false framing pattern.
    • 用于对准数据传输系统的接收机中的帧的方法和装置包括检查与接收的数据流相关联的一个或多个比特位置,以分别确定匹配预定比特模式的比特位置中的比特数。 将位位置的数量与第一阈值和第二阈值进行比较。 当位数不小于第一阈值时,位位置被识别为与伪成帧模式相关联或模拟。 当数字不小于第二阈值时,位位置被识别为潜在的成帧位位置或可能的成帧位位置。 当位位置被识别为潜在成帧位位置并且另一位位置被识别为与伪成帧模式相关联时,第一阈值被改变。 例如,对于每个帧,可以将第一阈值增加给定值,将位位置识别为潜在成帧位位置,并且将另一位位置识别为与伪成帧模式相关联。 给定值可以是值1,值小于1,或大于1的值。 当位位置被识别为潜在的成帧位位置并且没有其他位位置被识别为与伪成帧模式相关联时,声明帧对齐。