Title :
On the self-noise in QASK decision-feedback carrier tracking loops
Author :
Hinedi, Sami ; Lindsey, William C.
Author_Institution :
Jet Propulsion Lab., Pasadena, CA, USA
fDate :
4/1/1989 12:00:00 AM
Abstract :
Quadrature amplitude-shift keying (QASK) is often used for transmitting two digital data streams in bandwidth-constrained communication systems. Previous analyses of the tracking performance of a decision-feedback carrier tracking loop, which can be used to provide a carrier reference for a QASK signal set, have neglected the effects of the self-noise in the derivation of the loop resonance. The authors incorporate the effects of the self-noise will only result in a conservative assessment of the system´s performance, contrary to what might be expected. All results obtained are in closed form and can easily be evaluated numerically for performance prediction purposes
Keywords :
amplitude modulation; digital communication systems; feedback; noise; signal detection; QASK decision-feedback carrier tracking loops; QASK signal set; bandwidth-constrained communication systems; carrier reference; digital data streams; loop resonance; quadrature amplitude shift keying; self-noise; system performance; tracking performance; Amplitude shift keying; Bandwidth; Error probability; Frequency estimation; Gaussian noise; Phase estimation; Phase noise; Quadrature phase shift keying; Signal analysis; Tracking loops;
Journal_Title :
Communications, IEEE Transactions on