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    • 8. 发明授权
    • Phase correction for a phase modulated signal with mutually interfering symbols
    • 具有相互干扰符号的相位调制信号的相位校正
    • US07263139B1
    • 2007-08-28
    • US10646101
    • 2003-08-22
    • Samuel C. KingstonOsama Sami HaddadinWilliam K. McIntire
    • Samuel C. KingstonOsama Sami HaddadinWilliam K. McIntire
    • H03D3/24H03D3/00H04L27/22
    • H04L27/2272H04L7/0054H04L7/0083H04L2027/0055
    • A circuit and method for correcting phase of a received phase modulated (PM) signal. The method uses k most recently received data bits, which alternate between in-phase I and quadrature Q bits, as an address for a lookup table 60. The lookup table outputs a phase figure 62 derived from a reconstructed waveform. When the most recent k bit is a Q bit, the complement 68 of the phase figure 62 is calculated to yield a phase correction. Otherwise, the phase figure is the phase correction, which is applied to adjust the phase of a delayed version of the received signal. The delayed, phase adjusted signal is then applied to correct the phase of a received signal. The circuit splits an input PM signal in parallel between a matched filter 54 and a delay block 76, 88. The matched filter output provides the input to a register 58 for storing the k data bits. The delay block holds the PM signal until it is input into a loop phase shifter 78 synchronously with the phase correction. The output of the loop phase filter is input, after filtering, to a primary phase shifter 52 that adjusts phase of a received PM signal.
    • 一种用于校正接收相位调制(PM)信号的相位的电路和方法。 该方法使用k个最近接收的数据位,其在同相I和正交Q位之间交替,作为查找表60的地址。 查找表输出从重构波形得出的相位图62。 当最近的k位是Q位时,相位图62的补码68被计算以产生相位校正。 否则,相位图是相位校正,其用于调整接收信号的延迟版本的相位。 然后施加延迟的相位调整信号以校正接收信号的相位。 电路将输入PM信号并入匹配滤波器54和延迟块76,88之间。 匹配滤波器输出将输入提供给寄存器58以存储k个数据位。 延迟块保持PM信号,直到其与相位校正同步地输入到环路移相器78中。 滤波后的环路相位滤波器的输出被输入到调整接收到的PM信号的相位的主移相器52。