公开(公告)号：US09014323B2

公开(公告)日：2015-04-21

申请号：US14015197

申请日：2013-08-30

Applicant: NXP B.V.

Inventor： Jos Verlinden ,  Remco Cornelis Herman van de Beek

IPC: H03D3/24 ,  H04L7/033 ,  H04L7/00

CPC classification number: H04L7/0331 ,  H03L7/0992 ,  H03L7/14 ,  H03L7/23 ,  H03L7/235 ,  H04L7/0079

Abstract: Various aspects of the present disclosure are directed apparatuses and methods including a first phase locked loop (PLL) circuit and a second PLL circuit. The first PLL circuit receives a carrier signal that is transmitted over a communications channel from a non-synchronous device, and generates a PLL-PLL control signal. The second PLL circuit receives a stable reference-oscillation signal, and, in response to the PLL-PLL control signal indicating a frequency offset, adjusts a fractional divider ratio of the second PLL circuit. The first PLL circuit and the second PLL circuit are configured to produce an output frequency signal that is synchronous to the carrier signal.

Abstract translation: 本公开的各个方面涉及包括第一锁相环（PLL）电路和第二PLL电路的装置和方法。 第一PLL电路从非同步装置接收通过通信信道发送的载波信号，并生成PLL-PLL控制信号。 第二PLL电路接收稳定的参考振荡信号，响应于指示频率偏移的PLL-PLL控制信号，调整第二PLL电路的分数除数比。 第一PLL电路和第二PLL电路被配置为产生与载波信号同步的输出频率信号。

公开(公告)号：US20140003484A1

公开(公告)日：2014-01-02

申请号：US13929670

申请日：2013-06-27

Applicant: NXP B.V.

Inventor： Remco Cornelis Herman van de Beek ,  Massimo Ciacci ,  Jos Verlinden ,  Ghiath Al-kadi

IPC: H04L25/03

CPC classification number: H04L25/03891 ,  H03F1/3241 ,  H03F3/195 ,  H03F3/24 ,  H04L25/03343 ,  H04L25/49 ,  H04L27/368

Abstract: A method for pre-equalizing a digital modulated RF signal is presented. The method comprises receiving an input stream of symbols (x(i)) representing a phase change and magnitude of an RF signal, the magnitudes of the symbols in the input stream are constant, the phase changes of the symbols in the input stream encode digital information, and adjusting the input stream of symbols to reduce inter-symbol interference in transmission of an RF signal modulated according to the input stream, thus obtaining an equalized stream of symbols (x′(i)), each symbol of the equalized stream representing a phase change and magnitude of an RF signal. The adjusting comprising iteratively determining a next symbol of the equalized stream (x′(n)) after receiving a next symbol of the input stream (x(n)) by multiplying said next symbol of the input stream (x(n)) with a next adjusting real number (a(n)), multiplying a previous symbol of the input stream (x(n−1)) with a previous adjusting real number (a(n−1)), said previous symbol being received directly before said next symbol of the input stream, and computing the next symbol of the equalized stream from the multiplied next symbol of the input stream and the multiplied previous symbol of the input stream.

Abstract translation: 提出了一种用于预均衡数字调制RF信号的方法。 该方法包括接收表示RF信号的相位变化和幅度的符号（x（i））的输入流，输入流中符号的大小是恒定的，输入流中符号的相位变化将数字 信息，并且调整输入符号流以减少根据输入流调制的RF信号的传输中的符号间干扰，从而获得均衡的符号流（x'（i）），所述均衡流的每个符号表示 RF信号的相位变化和幅度。 所述调整包括通过将所述输入流（x（n））的所述下一个符号与所述输入流（x（n））的所述下一个符号相乘而将所述输入流（x（n））的所述下一个符号与 下一个调整实数（a（n）），将输入流的先前符号（x（n-1））与先前的调整实数（a（n-1））相乘） 表示输入流的下一个符号，并从输入流的相乘的下一个符号和输入流的相乘的先前符号计算均衡流的下一个符号。