公开(公告)号：US4603393A

公开(公告)日：1986-07-29

申请号：US607505

申请日：1984-05-07

Applicant: Pierre Laurent ,  Herve Ganem

Inventor： Pierre Laurent ,  Herve Ganem

IPC: H04L27/18 ,  H04L27/233 ,  H04L27/10 ,  H03D3/22 ,  H04B1/10

CPC classification number: H04L27/2332

Abstract: The demodulator is for use with an angle modulated signal conveying a sequence of binary symbols. The signal is modulated at constant envelope and with continuous phase and may be treated as a sequence of elementary pulses that have been amplitude modulated using a principal function F.sub.p (t) derived from the frequency pulse characteristic of the modulation. The demodulator comprises two filters matched to the principle function and connected to receive quadrature components constituting the complex envelope of the received signal. The filters are followed by samplers. A calculating circuit operating at the bit rate calculates metric increments on the basis of P stored complex samples and transmits the increments to a decision circuit which performs a dynamic programming algorithm to determine the values of the bits in the sequence recursively.

Abstract translation: 解调器用于传送二进制符号序列的角度调制信号。 信号以恒定包络和连续相调制，并且可以被视为已经使用从调制的频率脉冲特性导出的主函数Fp（t）进行幅度调制的基本脉冲序列。 解调器包括与原理功能匹配的两个滤波器，并连接以接收构成接收信号的复包络的正交分量。 过滤器之后是采样器。 以比特率操作的计算电路基于P个存储的复样本来计算度量增量，并将该增量发送到执行动态规划算法的判定电路，以递归地确定序列中的比特的值。