Synchronization method for a mobile radiotelephone

Details Synchronization method for a mobile radiotelephone Synchronization method for a mobile radiotelephone

1993-04-16

1995-02-14

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

375111, 375116, 3701051, H04L 700

Patent

active

053902165

ABSTRACT:
The high requirements of digital mobile radiotelephone communication under the GSM Standard with respect to synchronization of a mobile radiotelephone to a fixed radiotelephone station is performed by frequently (four times per so-called baseband frequency cycle) sampling contemporary in-phase and quadrature phase components of received GMSK digital signals and utilization of time slots respectively containing a frequency correction burst, a normal burst and an extended synchronization burst, respectively for initial synchronization, normal maintenance of synchronization during communication and a background procedure during normal operation. The decoding of the GMSK signal provides one-bit of information from each pair of in-phase and quadrature components sampled. The sampling of in-phase and quadrature components greatly simplifies the synchronizing procedure. Initial synchronization includes coarse frequency synchronization, coarse frame synchronization, fine frequency synchronization and fine frame synchronization. Normal maintenance of synchronization consists fine frame synchronization with fine frequency synchronization and a data signal preliminary processing. Extended synchronization consists of coarse frame synchronization and a fine frame synchronization with fine frequency synchronization.

REFERENCES:
patent: 4852090 (1989-07-01), Borth
patent: 4977580 (1990-12-01), McNicol
patent: 5157698 (1992-10-01), Hespelt et al.
patent: 5177740 (1993-01-01), Toy et al.
Ferrel G. Stremler, Introduction to Communication Systems, Copyright 1982, 1977 by Addison-Wesley Publishing Company, Inc., pp. 571-603.
Recommendation GSM 05.02, Multiplexing and Multiple Access on the Radio Path, Version 3.4.1, Released by ETSI/PT 12; Release date: Jan. 1990, pp. 1-36.
GSM Recommendation 05.04, Modulation, Jan. 1990, 3 pages, Version 3.1.1, ETSI/GSM.
Recommendation GSM 05.10, Radio Sub-System Synchronization, Version 3.4.0, Released by ETSI/PT 12; Release date: Mar. 1990, pp. 1-6.

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