Radio communications system with fixed and mobile stations - uses different bit sequences for synchronisation blocks from master and mobile stations

摘要

The radio communications system, with fixed and mobile stations, uses different bit frequency for the synchronisation blocks of data telegrams from the master fixed station and the mobiles so that the slave fixed station can distinguish between them. The sync. block of th master station has the form 11110100 and that of the mobiles 11110010. This avoids the need to alter the block structure of the data telegram.