Mapping apparatus and method for transmission of data in a multi-carrier broadcast system

Abstract

An apparatus and a corresponding method for mapping payload data of mapping input data streams onto a mapping output data stream having a channel bandwidth for transmission in a multi-carrier broadcast system includes first and second frame forming mechanisms. The first frame forming mechanism is adapted to form first frames having a first frame structure and the second frame forming mechanism is adapted to form second frames having a second frame structure. Preferably, in a second frame structure the data blocks of a particular mapping input data stream are spread in time and frequency over various data symbols and various data segments of the second frames to provide high robustness against disturbances. The payload portion of the second frame is preferably segmented into various data segments enabling use of a narrow-band receiver, even if both the first and second frames cover the same total channel bandwidth.

Description

FIELD OF INVENTION[0001]The present invention relates to an apparatus for mapping payload data of mapping input data streams onto a mapping output data stream having a channel bandwidth for transmission in a multi-carrier broadcast system. Further, the present invention relates to a transmission apparatus for transmitting data within a multi-carrier broadcast system. Still further, the present invention relates to corresponding methods, a computer program for implementing said methods on a computer and a computer readable non-transitory medium. Finally, the present invention relates to a frame structure carrying data in a channel of a predetermined channel bandwidth for transmission in a multi-carrier broadcast system.[0002]The present invention relates, for instance, to the field of Digital Video Broadcasting (DVB) utilizing Orthogonal Frequency Division Multiplexing (OFDM). Further, the present invention can generally be applied in other broadcast systems, such as DAB (Digital Aud...

AI Technical Summary

Benefits of technology

The patent proposes a method for reducing power consumption in narrow-band receivers while still allowing for the use of multiple types of receivers. This is achieved by segmenting the data payload of frames into smaller data segments that each cover a portion of the available channel bandwidth. This allows for a more efficient use of the receiver's tuner bandwidth. Additionally, the frames have a structure that allows for the flexible mapping of data blocks onto the frame, making it easier to use different types of receivers while still achieving the benefits of band segmentation.

Problems solved by technology

However, it is difficult for a mobile receiver to receive larger bandwidths up to 20 MHz due to its limited processing power.

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