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

摘要

A method and an apparatus for receiving broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse signal frames from the demodulated broadcast signals, a MIMO (Multi Input Multi Output) processor to process service data in the parsed signal frames based on a rotation matrix with a rotation angle, a demapper to demap the MIMO processed service data and a decoder to decode the demapped service data.

主权项

1. A method for receiving broadcast signals, the method comprising:
receiving broadcast signals; demodulating the received broadcast signals by an Orthogonal Frequency Division Multiplex (OFDM) scheme; parsing signal frames from the demodulated broadcast signals; Multi Input Multi Output (MIMO) processing service data in the parsed signal frames based on a rotation matrix with a rotation angle, wherein the value of the rotation angle depends on a modulation order and code rate of the service data, wherein the modulation order is one of Quadrature Phase Shift Keying (QPSK) modulation and Non-Uniform Constellation (NUC); demapping the MIMO processed service data; and decoding the demapped service data.