公开(公告)号：WO2002091696A2

公开(公告)日：2002-11-14

申请号：PCT/IB2002/003336

申请日：2002-04-16

Applicant: PARATEC LTD. ,  HASKIN, Abraham

Inventor： HASKIN, Abraham

IPC: H04L27/00

CPC classification number: H04L27/122 ,  H04L27/1563

Abstract: A frequency modulation method, system and computer readable-medium for enabling high speed, reliable and simple digital data modulation, transmission and reception. The system of the present invention includes a Synthetic Harmonic Waveform Generator for generating harmonic waves of the form cos(2πƒ dev t) from a digital data bit stream. The system of the present invention uses the generated harmonic waves to create a frequency modulation signal of the form sin(2πƒ carrier t±2πƒ dev t), which is then transmitted. The present invention also includes a demodulation technique for receiving a signal of the form sin(2πƒ carrier t±2πƒ dev t), which is used to determine whether a "1" or "0" digital bit has been transmitted.

Abstract translation: 公开了一种产生和解调二进制频移键控（2-FSK）信号的方法。 对于调制和解调，一个正交调制器 使用解调器。 对于调制，作为同相信号是恒定余弦信号，并且作为正交信号，使用正弦信号（其根据数据改变）。 在接收机侧，从恒定余弦信号的过零点，导出时变时刻，其中评估变化的正弦信号的振幅。 过零点处的余弦信号的斜率与正弦信号的幅度（即复基带信号的相位变化的方向）一起给出并估计发送的位。