Multiple access up converter/modulator and method
    4.
    发明授权
    Multiple access up converter/modulator and method 失效
    多路存取转换器/调制器和方法

    公开(公告)号:US5854813A

    公开(公告)日:1998-12-29

    申请号:US912300

    申请日:1997-08-12

    IPC分类号: H04L27/20

    CPC分类号: H04L27/20

    摘要: A multiple access digital up converter/modulator includes selectors (1606, 1608) having inputs (1602, 1604) and outputs coupled to first and second interpolating filters (1610, 1626). The output of the first interpolating filter is selectively coupled to a first mixer (1612) and a first adder (1622), the first adder also receiving a first phase value and the output is coupled to a first phase accumulator (1616) the output of which is coupled to a first sinusoid generator (1614) and selectively coupled to a second sinusoid generator (1630). The output of each of the first and second mixers are selectively coupled to an output adder (1634) and to inputs of the first and second mixers. The output of the second interpolating filter (1626) is selectively coupled to a second mixer (1628) and a second adder (1638), which also receives a second phase value and the output of which is coupled to a second phase accumulator (1640) the output of which is selectively coupled to the second sinusoid generator. The output of each of the first and second mixers are selectively coupled to an output adder (1634).

    摘要翻译: 多址数字上变换器/调制器包括具有输入(1602,1604)的选择器(1606,1608)和耦合到第一和第二内插滤波器(1610,1626)的输出。 第一内插滤波器的输出选择性地耦合到第一混频器(1612)和第一加法器(1622),第一加法器还接收第一相位值,并且输出端耦合到第一相位累加器(1616) 其耦合到第一正弦波发生器(1614)并且选择性地耦合到第二正弦波发生器(1630)。 第一和第二混频器中的每一个的输出选择性地耦合到输出加法器(1634)和第一和第二混频器的输入端。 第二内插滤波器(1626)的输出选择性地耦合到第二混频器(1628)和第二加法器(1638),第二加法器(1638)还接收第二相位值,其输出耦合到第二相位累加器(1640) 其输出选择性地耦合到第二正弦波发生器。 第一和第二混频器中的每一个的输出选择性地耦合到输出加法器(1634)。