Layered Division Multiplexing (LDM) is a way of multiplexing two signals in a single RF TV channel in order to enable simultaneous delivery of two streams conveying independent or complementary broadcast services. This is possible by using spectrum overlay and signal cancellation techniques.

LDM is a candidate technology to the ATSC 3.0 standard, and is a matter of technical discussions in other standardization and broadcast promotion such as DVB and FOBTV.

Despite the fact that LDM can be used in a variety of application scenarios, the most immediate use case is the simultaneous delivery of UHDTV signals and ultra-robust mobile/portable indoor HD services using a single UHF channel.






HW implementations


SDR prototype





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