Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals

摘要

The present invention provides a method of transmitting broadcast signals. The method includes, formatting input streams into Data Pipe, DP, data; Low-Density Parity-Check, LDPC, encoding the DP data according to a code rate; bit interleaving the LDPC encoded DP data; mapping the bit interleaved DP data onto constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC (Non-Uniform Constellation); Multi-Input Multi-Output, MIMO, encoding the mapped DP data by using a MIMO encoding matrix having a MIMO encoding parameter; building at least one signal frame by mapping the MIMO encoded DP data; and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.

主权项

1. A method of transmitting broadcast signals, the method comprising:
encoding PLP (Physical Layer Pipe) data according to a code rate; bit interleaving the encoded PLP data; demultiplexing the bit interleaved PLP data into first data cells and second data cells; mapping the first data cells onto first symbols in a first NUC (Non-Uniform Constellation), and mapping the second data cells onto second symbols in a second NUC; MIMO (Multi-Input Multi-Output) encoding pairs of the first and second symbols, wherein the MIMO encoding further includes:
applying a rotation matrix rotating the pairs based on a MIMO parameter,wherein value of the MIMO parameter is defined based on the code rate and types of the first and second NUCs, andapplying a phase rotation to the second symbols in the pairs; time interleaving the MIMO encoded data; building at least one signal frame by mapping the time interleaved data; and modulating data in the built signal frame by OFDM (Orthogonal Frequency Division Multiplexing) method and transmitting the broadcast signals having the modulated data.