EP1039675A3

5G,4G,3G

Title

Multiresolution transmission with multicarrier signals

Application Number:

EP20000114692

Publication Date:

06-12-2000

Current Assignee:

Family ID:

Application Date:

26-03-1993

Publication Country:

US

Priority Date:

26-03-1992

Title

Multiresolution transmission with multicarrier signals

Application Number:

EP20000114692

Family ID:

Publication Country:

US

Publication Date:

06-12-2000

Application Date:

26-03-1993

Priority Date:

26-03-1992

Current Assignee:

Abstract  Abstract

In the transmitter, data are divided into two or more groups, according to importance. In a three group system, for example, the data streams are then mapped onto a multiresolution QAM constellation in the following way. The most important data are determine the quadrant, the next most important determine which of four subsets is used in that quadrant, the next most important determine which of four points is used within that subset. This mapping system allows receivers of differing capabilites to detect as much data as they are able, or a single receiver to detect as much data as the channel quality allows. For example, a QPSK receiver could detect the most important data, a modified 16QAM receiver could detect the most important and second most important data, while a modified 64QAM receiver could receive all the data. The system can be used for HDTV transmission, either satellite or terrestrial, DAB, mobile telephone systems, or similar. When used for HDTV, for example, a QPSK receiver can detect an NTSC signal, a 16QAM receiver can detect an EDTV signal, and a 64QAM receiver can detect a full HDTV signal.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.