Instantaneous phase tracking in single sideband systems

Details Instantaneous phase tracking in single sideband systems Instantaneous phase tracking in single sideband systems

1980-12-29

1983-08-02

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Suppressed carrier

329 50, 375 77, 375119, 455203, 455263, 455265, H04B 110, H04B 126

Patent

active

043970397

ABSTRACT:
A receiver for demodulating a single sideband signal which is subject to rapid phase jitter employs a Hilbert splitter for obtaining the Hilbert transform of the single sideband signal, and a local oscillator for signal demodulation. A post-oscillator feedback loop instantaneously derives the amount of phase jitter in the single sideband signal, and employs the derived phase jitter to adjust the phase of the local oscillator so that the local oscillator tracks the single sideband signal.
Instantaneous derivation of the phase jitter is obtained because all post-oscillator signal manipulations are algebraic; post-oscillator Hilbert transform generation is not required. A first embodiment derives the exact amount of phase jitter. A second embodiment, more simple than the first, derives the approximate amount of phase jitter.

REFERENCES:
patent: 2943193 (1960-06-01), Webb
patent: 3286183 (1966-11-01), Bergemann
patent: 3331025 (1967-07-01), Rameau
patent: 3518680 (1970-06-01), McAuliffe
patent: 3675131 (1972-01-01), Pickholtz
patent: 3701948 (1972-10-01), McAuliffe
patent: 3878468 (1975-04-01), Falconer et al.
patent: 3971996 (1976-01-01), Motley et al.
patent: 4028626 (1977-06-01), Motley et al.
Spaulding, D. A., "A New Digital Coherent Demodulator", vol. 1, COM-21, No. 3, Mar. 1973, pp. 237-238.
H. Kobayashi, "Simultaneous Adaptive Estimation and Decision Algorithm for Carrier Modulated Data Transmission Systems", IEEE Transactions on Communication Technology, vol. COM-19, No. 3, Jun. 1971, pp. 268-280.

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