Patent ID: 8170091
Filing Date: 2012-05-01
Classification: H03M,H04L

Abstract:
1. A data processing apparatus configured to map data symbols received from a predetermined number of sub-carrier signals of an Orthogonal Frequency Division Multiplexed (OFDM) symbol into an output symbol stream, the data processing apparatus comprising: a de-interleaver configured to read-into an interleaver memory the predetermined number of data symbols from the OFDM sub-carrier signals, and to read-out of the memory the data symbols into the output symbol stream to effect the mapping, the read-out being in a different order than the read-in, the order being determined from a set of addresses, with the effect that the data symbols are de-interleaved from the OFDM sub-carrier signals, and an address generator configured to generate the set of addresses, an address being generated for each of the received data symbols to indicate the OFDM sub-carrier signal from which the received data symbol is to be mapped into the output symbol stream, the address generator comprising: the predetermined maximum valid address is less than one thousand and twenty four, the linear feedback shift register has nine register stages with a generator polynomial for the linear feedback shift register of R′