Patent ID: 8630313
Filing Date: 2014-01-14
Classification: H04L

Abstract:
1. A signal mapping method for mapping data signals and pilot signals having a known pattern in each symbol determined by a subcarrier number and a symbol number, or in each symbol determined by a frequency axis and a time axis, in a multicarrier communication system that communicates an encoded signal by using a plurality of subcarriers, the signal mapping method comprising steps of: subjecting a transmit signal of N0 bits to error correction encoding to generate a signal of N1 bits; and when signals that can be mapped in a plurality of first data symbols not simultaneously transmitted with the pilot symbols are M0 bits, and signals that can be mapped in a plurality of second data symbols simultaneously transmitted with the pilot symbols are M1 bits, (i) in a case of N0≦M0≦N1, extracting M0 bits minimumly required for decoding the transmit signal of N0 bits before the error correction encoding, from the signals N1 bits after the error correction encoding to configure punctured codes of an encoding ratio N0/M0, mapping the punctured codes in the plurality of first data symbols, and also mapping a part or all of bits of the signals that are not mapped in the plurality of first data symbols among the signals after the error correction encoding, in the plurality of second data symbols, (ii) in a case of M0>N1, mapping all of the signals N1 bits after the error correction encoding in the plurality of first data symbols, (iii) in a case of M0<N0≦M0+M1, configuring the codes of the encoding ratio N0/(M0+M1) from the signals N1 bits after the error correction encoding, and mapping the codes in the plurality of first data symbols and the plurality of second data symbols.