发明名称 |
Method and apparatus for digital amplitude and phase modulation |
摘要 |
A transmitter using quadrature modulation includes a rectangular to polar converter for converting data symbols into a polar form, where each polar symbol has a magnitude signal and an angle signal. Digital phase modulation circuitry includes an all digital PLL circuit for generating a phase modulated RF carrier signal responsive to the angle signal frequency control word (FCW) and a carrier frequency FCW. A digitally controlled amplifier for amplifying the phase modulated signal is controlled by a digital amplitude control circuitry for controlling the gain of the digitally controlled amplifier responsive to the magnitude signal.
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申请公布号 |
US7929637(B2) |
申请公布日期 |
2011.04.19 |
申请号 |
US20040927879 |
申请日期 |
2004.08.27 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
STASZEWSKI ROBERT B.;REZEQ SAMEH;LEIPOLD DIRK |
分类号 |
H04L27/00;H03F1/02;H03F1/06;H03F1/32;H03F3/24;H04K1/02;H04L27/20;H04L27/36 |
主分类号 |
H04L27/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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