Patent ID: 6016320
Filing Date: 2000-01-18
Classification: H04J

Abstract:
An arrangement for marshalling an outstation in a time division multiple access (TDMA) telecommunications system including a base station and a plurality of outstations, each said outstation having means for transmitting a marshalling sequence continuously and in parallel with a transmitted data signal, said data signal having a first high logic level condition and a second low logic level condition, wherein the base station incorporates first detection means for detecting the marshalling signal when the corresponding data signal is in its first level condition, second detection means for detecting the marshalling signal when the data signal is in its second level condition, wherein the base station incorporates means responsive to the level condition of the data signal for selectively enabling the first or second detector means, wherein said first and second detection means comprise respective first and second comparators each of whose threshold is adjusted to the respective high or lower level condition of the data signal so as to effect detection of the marshalling signal during that data signal level condition, and wherein the high or low level condition of the data signal is determined via a third comparator whose threshold is adjusted to a level between said first and second levels.