| 摘要 |
A method for the reception and the detection of digital signals wherein at least two signals (s1, s2, . . . sM) having at least approximately the same information content are received and at least all signals (s1, s2, . . . , sM) but one are subjected to a phase shift. The shifted signals (s'1, s'2, . . . , s'M) are combined in a summing point, the sum signal (s) is fed to a detector for detection, a reference carrier (ca) is generated in a reference carrier generator and a coherent demodulation and detection is carried out in the detector by means of said carrier (ca). According to the invention a projection voltage (zk) defined by the equation zk=yQk sIk-yIk sQk is generated, wherein yIk is a signal sample in the in-phase branch before threshold decision in the detector, yQk is the signal sample in the quadrature branch before decision, sIk is the detected signal in the in-phase branch, and sQk is the detected signal in the quadrature branch.
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