公开(公告)号：EP1695505A1

公开(公告)日：2006-08-30

申请号：EP04817931.1

申请日：2004-12-03

Applicant: M/A-COM, INC.

Inventor： LIU, Frank

IPC: H04L27/36

CPC classification number: H04L27/361 ,  H04L27/2003 ,  H04L27/2035

Abstract: The invention relates to a system for processing an electromagnetic input signal in which processing circuitry may be used to produce a bounded phase signal, such as by calculating an n-bit 2's compliment number in the range of [-1, 1] from phase sample information for an input wave; and producing an unwrapped phase difference signal from the bound phase signal, such as by taking a 2's compliment subtraction using another wrapped phase signal from previous phase sample information. A corrected phase signal may also be used by taking a 2's complement addition using the bounded phase signal, wherein the unwrapped phase difference signal is produced using the corrected phase signal.

公开(公告)号：EP1550280A1

公开(公告)日：2005-07-06

申请号：EP03811230.6

申请日：2003-10-07

Applicant: M/A-COM, INC.

Inventor： LIU, Frank

IPC: H04L27/36 ,  H04L25/03

CPC classification number: H03F3/24 ,  H04L25/03343 ,  H04L27/361 ,  H04L27/368

Abstract: The invention is directed to a system for determining a transfer function for emphasizing an electromagnetic signal prior to being processed by determining a discrete transfer function for a processing system, such as a wideband phase modulator; determining a target transfer function such that the target transfer function multiplied by the inverse of the discrete transfer function produces a discrete pre-emphasis transfer function; and transforming any unstable poles and/or zeros in the pre-emphasis transfer function to stable poles and/or zeros. The discrete transfer function may be determined, for example, by using an S-function, input and output signals, the inverse-invariant method, and/or the Steiglitz-McBride algorithm. The transformation of the unstable poles and/or zeros may be accomplished using an all pass filter. The target transfer function may be a low pass FIR filter having a gain of about unity across substantially all of the frequency range of said FIR filter.

公开(公告)号：WO2005057871A1

公开(公告)日：2005-06-23

申请号：PCT/US2004/040293

申请日：2004-12-03

Applicant: M/A-COM, Inc.

Inventor： LIU, Frank

IPC: H04L27/36

CPC classification number: H04L27/361 ,  H04L27/2003 ,  H04L27/2035

Abstract: The invention relates to a system for processing an electromagnetic input signal in which processing circuitry may be used to produce a bounded phase signal, such as by calculating an n-bit 2's compliment number in the range of [-1, 1] from phase sample information for an input wave; and producing an unwrapped phase difference signal from the bound phase signal, such as by taking a 2's compliment subtraction using another wrapped phase signal from previous phase sample information. A corrected phase signal may also be used by taking a 2's complement addition using the bounded phase signal, wherein the unwrapped phase difference signal is produced using the corrected phase signal.

Abstract translation: 本发明涉及一种用于处理电磁输入信号的系统，其中处理电路可用于产生有界相位信号，例如通过从相位采样计算[-1,1]范围内的n位2的补码数 输入波信息; 并且从绑定相位信号产生展开的相位差信号，例如通过使用来自前一相位样本信息的另一个包裹相位信号进行2的补码减法。 也可以通过使用有界相位信号进行2的补码加法来使用校正的相位信号，其中使用校正的相位信号产生展开的相位差信号。

公开(公告)号：WO2004034659A2

公开(公告)日：2004-04-22

申请号：PCT/US2003/032024

申请日：2003-10-07

Applicant: M/A-COM, INC.

Inventor： LIU, Frank

IPC: H04L25/00

CPC classification number: H04L27/368 ,  H04L25/03343 ,  H04L27/361

Abstract: The invention is directed to a system for processing an electromagnetic wave by receiving rectangular coordinate information for the electromagnetic wave; and directly converting the rectangular coordinate information into a magnitude signal, a sin(ϕ), and a cos(ϕ) signal using a CORDIC algorithm, where ϕ represents a phase of the electromagnetic wave. The direct converting my be accomplished using shift and add/subtract operations in a processor and look-up table, or by using at least two cascaded processors employing the CORDIC algorithm.

Abstract translation: 本发明涉及一种通过接收电磁波的直角坐标信息来处理电磁波的系统; 并且使用CORDIC算法将直角坐标信息直接转换为幅度信号，sin（φ）和cos（φ）信号，其中φ表示电磁波的相位。 在处理器和查找表中使用移位和加/减操作直接转换，或者使用CORDIC算法至少使用两个级联处理器。

公开(公告)号：WO2004045180A1

公开(公告)日：2004-05-27

申请号：PCT/US2003/031845

申请日：2003-10-07

Applicant: M/A-COM, INC.

Inventor： LIU, Frank

IPC: H04L27/36

CPC classification number: H03F3/24 ,  H04L25/03343 ,  H04L27/361 ,  H04L27/368

Abstract: The invention is directed to a system for determining a transfer function for emphasizing an electromagnetic signal prior to being processed by determining a discrete transfer function for a processing system, such as a wideband phase modulator; determining a target transfer function such that the target transfer function multiplied by the inverse of the discrete transfer function produces a discrete pre-emphasis transfer function; and transforming any unstable poles and/or zeros in the pre-emphasis transfer function to stable poles and/or zeros. The discrete transfer function may be determined, for example, by using an S-function, input and output signals, the inverse-invariant method, and/or the Steiglitz-McBride algorithm. The transformation of the unstable poles and/or zeros may be accomplished using an all pass filter. The target transfer function may be a low pass FIR filter having a gain of about unity across substantially all of the frequency range of said FIR filter.

Abstract translation: 本发明涉及一种用于通过确定诸如宽带相位调制器之类的处理系统的离散传递函数来确定在处理之前强调电磁信号的传递函数的系统; 确定目标传递函数，使得与离散传递函数的逆相乘的目标传递函数产生离散预加重传递函数; 并将预加重传递函数中的任何不稳定极点和/或零点变换到稳定的极点和/或零点。 离散传递函数可以例如通过使用S函数，输入和输出信号，逆不变方法和/或Steiglitz-McBride算法来确定。 不稳定极点和/或零点的变换可以使用全通滤波器来实现。 目标传递函数可以是在所述FIR滤波器的基本上所有频率范围上具有大致一个增益的低通FIR滤波器。