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1. 发明申请

WO2004027980A1 INTEGRATED MODULATOR AND DEMODULATOR CONFIGURATION 审中-公开
标题翻译：集成调制器和解调器配置
公开(公告)号：WO2004027980A1
公开(公告)日：2004-04-01
申请号：PCT/US2003/029241
申请日：2003-09-19
申请人： INTERSIL AMERICAS INC.
发明人： WEBSTER, Mark, A. , PONTON, Kent, A. , CHIUCHIOLO, Paul, J., Jr.
IPC分类号： H03C1/60
CPC分类号： H03H17/0275 , H03C3/40 , H03D3/006 , H03H17/0657 , H03H17/0664 , H03H2218/04
摘要： An integrated demodulator and decimator circuit (700, 800) including a selective digital sign inverter (703, 803) and a decimator (705, 805). The sign inverter negates selected digital samples based on Weaver demodulation and outputs demodulated digital samples at a sample rate. The decimator is a symmetric half-band FIR filter, where the demodulated digital samples are sequentially shifted through filter taps (721) at the sample rate. The decimator outputs real output values based on digital samples shifted into alternate taps and imaginary output values based on digital samples shifted into the center tap (26). An integrated modulator and interpolator circuit (217) includes a symmetric half-band FIR filter interpolator (500) and a digital sign inverter (507). The interpolator includes two polyphase filters and a multiplexer (505). A first polyphase filter filters real digital samples and a second filters imaginary digital samples. The multiplexer provides interpolated digital samples at four times the sample rate. The digital sign inverter negates selected digital samples according to Weaver modulation.
摘要翻译：一种包括选择性数字符号反相器（703,803）和抽取器（705,805）的集成解调器和抽取器电路（700,800）。符号逆变器根据Weaver解调器对所选择的数字样本进行取反，并以采样率输出解调数字样本。抽取器是对称半带FIR滤波器，其中解调的数字样本以采样率顺序地移动通过滤波器抽头（721）。抽取器基于基于移入中心抽头（26）的数字样本，基于移入交替抽头的数字样本和虚数输出值输出实际输出值。集成调制器和内插器电路（217）包括对称半带FIR滤波器内插器（500）和数字符号反相器（507）。内插器包括两个多相滤波器和多路复用器（505）。第一个多相滤波器滤除实数数字样本和第二个滤波器虚数字样本。多路复用器提供四倍采样率的内插数字采样。数字符号逆变器根据Weaver调制器对所选择的数字样本进行否定。

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