公开(公告)号：US5081433A

公开(公告)日：1992-01-14

申请号：US620667

申请日：1990-12-03

申请人： Bert K. Erickson ,  George C. Rosys ,  John F. Jureller ,  Victor J. Jacek

发明人： Bert K. Erickson ,  George C. Rosys ,  John F. Jureller ,  Victor J. Jacek

IPC分类号： G01S13/28 ,  H03C3/00 ,  H03C3/04

CPC分类号： G01S13/288 ,  H03C3/00 ,  H03C3/04

摘要： The invention relates to a two state phase modulator with minimum amplitude modulation. The modulator assumes two phase states differing by .THETA. where .THETA. is a sub-multiple of 180.degree. which permits a phase variation of 180.degree. for phase coded transmissions when the frequency of the phase modulated carrier wave is multiplied by the reciprocal of the sub-multiple. Three equal components are derived in the phase modulator: an in-phase, an out of phase, and a quadrature phase component. The out of phase component is delayed in relation to the in-phase component by .THETA./2, while the quadrature phase component is delayed .THETA./4. The in-phase and out of phase components are then reduced by a factor (2 sin .THETA./2) selected such that when added to the quadrature component, the resultants have a magnitude equal to that of the quadrature component and differ in phase from the quadrature comonent by .+-..THETA./2. The modulator output is formed of the resultants supplied in alternation with the quadrature component at zero phase being supplied during the transitions. Amplitude variation during the phase modulation process is reduced to a fraction of a decibel.

摘要翻译： 本发明涉及具有最小幅度调制的两状态相位调制器。 调制器假设两个相位状态不同于THETA，其中THETA是180°的子倍数，当相位调制载波的频率乘以子倍数的倒数时，允许相位变换为180°的相位编码传输的相位变化 。 在相位调制器中导出三个相等的分量：同相，异相和正交相位分量。 相位分量相对于同步分量由THETA / 2延迟，而正交相位分量延迟THETA / 4。 然后，同相和异相分量被选择为因子（2sin THETA / 2）减小，使得当加到正交分量时，结果的幅度等于正交分量的幅度，并且相位与 +/- THETA / 2的正交分子。 调制器输出由在转换期间提供的零相位正交分量交替提供的结果形成。 在相位调制过程中的幅度变化减小到分贝的分数。