公开(公告)号：US20140320182A1

公开(公告)日：2014-10-30

申请号：US14329333

申请日：2014-07-11

申请人： H. Britton SANDERFORD, JR. ,  Robert E. ROUQUETTE ,  Gary A. NADEN ,  Marc L. REED ,  Gordon J. BOUDREAUX ,  Michael R. BROWN

发明人： H. Britton SANDERFORD, JR. ,  Robert E. ROUQUETTE ,  Gary A. NADEN ,  Marc L. REED ,  Gordon J. BOUDREAUX ,  Michael R. BROWN

IPC分类号： H03L7/08

CPC分类号： H03L7/08 ,  H03B21/00 ,  H04L5/06 ,  H04L5/16 ,  H04L25/061 ,  H04L25/4902 ,  H04L25/4921 ,  H04L27/12 ,  H04L27/2331 ,  H04L27/32 ,  H04L27/34 ,  H04L27/3433 ,  H04L27/3483 ,  H04L27/364 ,  H04L27/38 ,  H04L27/3845 ,  H04W36/08 ,  H04W72/0426

摘要： A phase-locked loop frequency synthesizer includes an L-state pulse width modulator configured to receive a reference frequency signal and at least one entry from a frequency table, and to output at least one N/N+1 modulus signals corresponding to the at least one entry from the frequency table. The synthesizer includes a divide by N/N+1 controllable modulus divider configured to receive the at least one N/N+1 modulus signals and to divide the output frequency signal by the at least one N/N+1 modulus signals to generate a second reference frequency signal. The synthesizer includes a phase frequency detector configured to receive the reference frequency signal and the second reference frequency signal and to generate an error signal. The synthesizer also includes a filter network configured to receive the error signal and to output a voltage; and a voltage controlled oscillator configured to receive the voltage and to generate the output frequency signal.

摘要翻译： 锁相环频率合成器包括L状态脉冲宽度调制器，被配置为从频率表接收参考频率信号和至少一个条目，并且输出至少一个对应于至少一个N / N + 1模数信号 频率表中的一个条目。 合成器包括N / N + 1可控模数分频器的分频器，其被配置为接收至少一个N / N + 1模数信号，并且将输出频率信号除以至少一个N / N + 1模数信号，以产生 第二参考频率信号。 合成器包括相位频率检测器，被配置为接收参考频率信号和第二参考频率信号并产生误差信号。 合成器还包括被配置为接收误差信号并输出​​电压的滤波器网络; 以及被配置为接收电压并产生输出频率信号的压控振荡器。

公开(公告)号：US20120027132A1

公开(公告)日：2012-02-02

申请号：US12847951

申请日：2010-07-30

申请人： Robert E. ROUQUETTE

发明人： Robert E. ROUQUETTE

IPC分类号： H04B1/10 ,  H04L27/14

CPC分类号： H04L27/14 ,  H04L25/03012

摘要： A Gaussian Frequency Shift Key (GFSK) receiver includes a receiver front end to receive a GFSK-modulated signal and convert the received GFSK-modulated signal to a baseband frequency modulated signal, a channel filter to reduce channel interference which is adjacent to a desired channel of the baseband frequency modulated signal, a demodulator to demodulate the channel filtered baseband modulated signal and to recover a sequence of symbols, a digital filter to reduce inter-symbol interference (ISI) from the sequence of symbols, a slicer to produce symbol decisions based on the filtered sequence of symbols, and a symbol-to-bit mapper to map the symbol decisions to data bits.

摘要翻译： 高斯频移键（GFSK）接收机包括接收机前端，用于接收GFSK调制信号，并将接收到的GFSK调制信号转换为基带频率调制信号，通道滤波器以减少与期望信道相邻的信道干扰 基带调制信号的解调器，解调信道滤波的基带调制信号并恢复符号序列的解调器，数字滤波器，用于减少符号序列间的符号间干扰（ISI）;限幅器，以产生符号决定 在经滤波的符号序列上，以及符号到位映射器，以将符号判定映射到数据位。