| 摘要 |
A system and method for transfer of a digital information carrying signal (51) between an input of a transmitter and an output of a receiver. The information carrying signal is modulated in a modulator included in the transmitter (12), and the modulated signal is transmitted via a transmission medium (13) by transmission means (25) connected to the modulator. The transmitted signal is received by receiving means (41) included in the receiver, and the received signal is demodulated in a demodulator. The information carrying signal is modulated in the modulator with a predetermined first modulation index h0, adapted for efficient use of an available bandwidth of said transmission medium. In the receiver (14) a frequency signal (63) is created from the received signal. Further, the frequency signal (63) is amplified with a factor A, for creating a scaled frequency signal (64), from which a scaled phase signal (65) is created. A digital output signal (66) is created as a response to the scaled phase signal (65) in a decision decision device (47) operating with a predetermined second modulation index h1. The factor A is selected to be equal to h1/h0. |
