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LDACS1 vs LDACS2-Difference between LDACS1 and LDACS2

This page on LDACS1 vs LDACS2 describes difference between LDACS1 and LDACS2. LDACS stands for L band Digital Aeronautical Communication System. It is the communication mechanism between ASs (Aircraft Stations) and GS (Ground Station) to provide better Air Traffic Management.

Specification LDACS1 LDACS2
Modulation Broadband system based on OFDM; combining B-AMC and P34 Narrowband system based on single-carrier technology (GMSK); combining LDL and AMACS
Duplexing scheme FDD TDD
Capacity(Data Rate) Forward link-291kbps to 1.3MBPS
Reverse link-220KBPS to 1.04 MBPS
270.833 kbit/s per channel
Frequency of operation Operate in 960 to 1164 MHz frequency range operate in 960-975 MHz frequency range
maximum coverage range 200nm 200nm
Effective RF Channel bandwidth 498.05 KHz 200 kHz for a single channel
Frame Structure Refer LDACS1 frame structure Refer LDACS2 frame structure
Physical Layer Refer LDACS1 physical layer Refer LDACS2 physical layer

To understand difference between LDACS1 and LDACS2 one need to understand physical layer and frame structure of these systems as mentioned below.

LDACS(L Band Digital Aeronautical Communication System) RELATED LINKS

Difference between LDACS1 versus LDACS2
LDACS1 frame structure
LDACS2 frame structure
LDACS1 physical layer
LDACS2 physical layer
Difference between TDD and FDD
Air Traffic Management

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