M-phase PSK vector processor demodulator
This patent describes, for use in a demodulator for detecting information signals which have been encoded in the form of M-ary phase shift keying signals, a method of generating a reference phase signal through the use of which information signals are recovered from received M-ary phase shift keying signals comprising the steps of: (a) for a respective one of received M-ary PSK signals, generating M respective vector sum signals respectively representative of the vector sums of a reference phase vector signal and each of M prescribed phase vectors referenced relative to the respective one of a plurality of received M-ary PSK signals; (b) replacing the reference phase vector signal with that one of the vector sum signals generated in step (a) whose magnitude is largest; and (c) repeating steps (a) and (b) for a prescribed number N of received M-ary PSK signals to derive a reference phase vector signal that has been refined over the prescribed number N of received signals; whereby upon completion of steps (a)-(c), the refined reference phase vector signal corresponds to the reference phase signal through the use of which information signals encoded in the form of M-ary Pak signals are recovered.
- Assignee:
- Harris Corp., Melbourne, FL
- Patent Number(s):
- US 4631486
- OSTI ID:
- 6905511
- Resource Relation:
- Patent File Date: Filed date 1 Apr 1985
- Country of Publication:
- United States
- Language:
- English
Similar Records
Carrier tracking apparatus and method for a logging-while-drilling system
Adaptive vibration control using synchronous demodulation with machine tool controller motor commutation