Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 1927

b) synchronization and ambiguity resolution. 6.4.4.2.1.1 Transmitter ramp-up and power stabilization. This shall be as defined in 6.4.4.1.1.1. 6.4.4.2.1.2 Synchronization and ambiguity resolution. Three separate synchronization sequences shall be used for this burst type. The standard sequence, known as S1, shall be as follows: 000 111 001 001 010 110 000 011 100 110 011 111 010 101 100 101 and shall be transmitted from left to right. The special sequence used to identify poll responses shall be as defined in 6.4.4.1.1.2. The special sequence used to identify net entry requests (S1*) shall use the following sequence: 000 001 111 111 100 000 110 101 010 000 101 001 100 011 010 011 and shall be transmitted from left to right. Note.— The sequence S1* is very closely related to the sequence S1. The 15 phase changes between the 16 symbols of S1* are each exactly 180o out of phase from the 15 phase changes associated with S1 . This relationship can be used to simplify the process of simultaneously searching for both sequences. Part I Annex 10 — Aeronautical Communications I-6-15 22/11/07 6.4.4.2.2 System data. The system data segment shall consist of 16 transmitted symbols. The 48 transmitted bits shall be encoded as 24 bits of system data and 24 bits of parity bits generated as two consecutive (24, 12) Golay code words. The encoding of the (24, 12) Golay code words should be as defined in 6.4.4.1.2. 6.4.4.2.3 Transmitter ramp-down. This shall be as defined in 6.4.4.1.3. 6.4.4.3 Voice or data (V/D) burst. The V/D burst (as contained in the Manual on VDL Mode 3 Technical Specifications) shall consist of four segments: the training sequence followed by the header, the user information segment and the transmitter ramp down. The same V/D burst format shall be used for both uplink and downlink. 6.4.4.3.1 Training sequence. V/D burst training sequence shall consist of two components as follows:

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