Method and device for automatic synchronisation of data bursts

Details Method and device for automatic synchronisation of data bursts Method and device for automatic synchronisation of data bursts

H - Electricity

04

L

H04L 7/08 (2006.01) H04B 7/26 (2006.01)

Patent

CA 2136127

- 9 - SUMMARY Method and device for automatic synchronisation of data bursts. Applicable to cordless communications systems with time division multiple access, TDMA, for synchronising the timebases of cordless terminals and base stations. This device, which receives periodically and for a short interval of time a burst reception signal (A) to be synchronised, incorporates a register (1) which stores the value of a counter (3) when the burst reception signal (A) is high and subtracts from it, in an adder circuit (2), a reference value (REF) in order to adjust the references between the two timebases. To the output value (DELTA), a maximum value (MAX) is added or subtracted in a second adder circuit (4), depending on what timebare, the internal or the reference one is faster. Its output is compared with that of the counter (3) in a comparator (5) and the output (T) from the comparator is applied to a control circuit (6) that determines the module in the counter (3) for lengthening or shortening the burst to achieve synchronism. (Figure 3)

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