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Time Interleaving

A number of broadcasting standards (including DVB-T2) incorporates the time interleaving concept into its signal structure. This together with per-service configuration of transmission parameters (e.g. PLPs in DVB-T2) enables not only enhanced fixed and portable reception but also far better performance for mobile users.
Time interleaving spreads FEC blocks over a larger time interval (interleaving frame) in order to randomly distribute time fading errors of a channel (especially mobile) and increase FEC decoding ability to recover transmitted data. DVB-T2 takes this concept one step further and introduces multi-frame interleaving which allows spanning the interleaving window over multiple T2 frames further increasing the ability to resist fading.
Since multi-frame time interleaving introduces delay, careful balancing between error protection due to fading and additional delay needs to be considered to avoid unnecessary latency in the broadcasting service.
For multi-frame interleaving options and frame structure optimization for particular service please contact us.
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