Technique for demodulating and decoding mls dpsk...

Details Technique for demodulating and decoding mls dpsk... Technique for demodulating and decoding mls dpsk...

G - Physics

01

S

G01S 1/56 (2006.01) H04L 27/22 (2006.01) H04L 27/233 (2006.01)

Patent

CA 2086550

2086550 9201948 PCTABS00010 A system for demodulating and decoding differential phase shift keying (DPSK) transmissions utilizes a bandpass filter (11), an analog to digital converter (12) and a digital signal processor (13). Removal of the effects of unknown frequency component is achieved by applying a complex phase correction/rotation factor after DPSK demodulation. The actual phase of the complex signal is never computed directly. All of the processing from Rader decomposition (14) through carrier tracking filter is performed on the complex values and therefore requires only multiplication and addition operations which can be performed at high speed in a microcomputer or in dedicated arithmetic hardware.

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