Sample timing selection and frequency offset correction for U.S.

Details Sample timing selection and frequency offset correction for U.S. Sample timing selection and frequency offset correction for U.S.

1993-03-08

1994-08-30

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375106, 375114, 375120, 3701051, 370106, H04L 2700

Patent

active

053434986

ABSTRACT:
A Time Division Multiple Access (TDMA) radio system achieves synchronization by performing a two-step synchronization. A simplified frame/slot synchronization is followed by a symbol synchronization of higher accuracy. This symbol timing is passed to a frequency offset unit which determines the amount of frequency drift between the transmitter and receiver and compensates for the frequency drift. This results in improved receiver performance for the TDMA digital radio system.

REFERENCES:
patent: 5177740 (1993-01-01), Toy et al.
"A Bit Synchronization and Timing Sensitivity Viterbi Equalizers for Narrowband TDMA Digital Mobile Radio Systems", A. Baier, G. Heinrich, and U. Wellens, IEEE Vehicular Technology Conference, (Philadelphia), pp. 377-384, 1988.
Pages 85-86 of Jan. '91 EIA/TIA "Interim Standard-Cellular System, Dual Mode Mobile Station-Base Station Compatibility Standard" Publication IS-52-A by the Electronics Industries Assoc.
Pages 533-537 in "Digital Cellular Systems for North America", Roc. Globecom by C. E. W. Sundberg and N. Seshadri, pp. 533-537.
Pages 20-21 of the Mar. 1991 draft of EIA/TIA "Cellular System, Recommended Minimum Performance Standards for 800 MHz Dual-Mode Mobile Stations" Publication TIA TR45.3, Project No. 2216 by the Electronics Industries Assoc., Engineering Dept.

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