Probabilities of overflow and error in coded phase-shift-keyed systems with sequential decoding
Probabilities of overflow and error in coded phase shift keyed systems with sequential decoding
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Probabilities of overflow and error in coded phase shift keyed systems with sequential decoding
Timing errors effect on detector output statistics of phase shift keyed /PSK/ communication systems
Pulse code modulation/phase-shift keying subcarrier demodulator for data acquisition
Tabulated data provides phase shifting of sequences information for facilitating design of synchronous digital machines
Graph and derivation of performance characteristics of phase-shift-keyed communication systems where receiver phase rerference is noisy
Optimal design of one-way and two-way coherent communication links for space communication
Optimal design of one-way and two-way coherent communication links for space communication
The practicability of a multi-frequency antenna for spaceborne microwave radiometers was considered in detail. The program consisted of a comparative study of various antenna systems, both mechanically and electronically scanned, in relation to specified design goals and desired system performance. The study involved several distinct tasks: definition of candidate antennas that are lightweight and that, at the specified frequencies of 5, 10, 18, 22, and 36 GHz, can provide conical scanning, dual linear polarization, and simultaneous multiple frequency operation; examination of various feed systems and phase-shifting techniques; detailed analysis of several key performance parameters such as beam efficiency, sidelobe level, and antenna beam footprint size; and conception of an antenna/feed system that could meet the design goals. Candidate antennas examined include phased arrays, lenses, and optical reflector systems. Mechanical, electrical, and performance characteristics of the various systems were tabulated for ease of comparison.
Receiver for 2.4-kbit/s differential minimum-shift keying (DMSK) and Gaussian minimum-shift keying(GMSK) suitable for communication between land-mobile stations via geostationary satellites. Operating on phase-shifted signal in 800-MHz band, in presence of fading and Doppler frequency shifts, receiver compact, makes efficient use of frequency spectrum, and wastes little power. Receiver design implemented in very-large-scale-integrated circuits. Basic DMSK receiver design relies on baseband rather than intermediate-frequency processing of in-phase and quadrature signal components because phase errors due to differential delays smaller at baseband.