Patent ID: 8170092
Filing Date: 2012-05-01
Classification: H03M,H04L,H04N

Abstract:
1. A data processing apparatus configured to map data symbols received from sub-carrier signals of Orthogonal Frequency Division Multiplexed (OFDM) symbols into an output data stream, the number of sub-carrier signals available for each OFDM symbol being variable between each of the OFDM symbols, and the data symbols including first sets of input data symbols and second sets of input data symbols received from odd and even OFDM symbols respectively, the data processing apparatus comprising: an address generator, a de-interleaver memory, and a controller, the controller being configured in combination with the address generator to de-interleave the first sets of data symbols and the second sets of data symbols by writing the first and second sets of data symbols into the de-interleaver memory and reading the first and second sets of data symbols out from the de-interleaver memory, the reading out of the de-interleaver memory being in a different order to the writing into the de-interleaver memory, the de-interleaving of the first sets of input data symbols being in accordance with an odd de-interleaving process including the number of the sub-carriers which are available from a previous OFDM symbol is different from the number of the sub-carriers which are available from a current OFDM symbol, and the controller is configured