MOBILE COMMUNICATION METHOD AND RADIO TERMINAL

摘要

A transmission apparatus configured to transmit four OFDM signals from four transmission antennas includes: a pilot signal insertion unit configured to generate four types of OFDM symbols by inserting pilot signals of different patterns into four types of transmission signals; and an OFDM signal generation unit configured to generate four OFDM signals by modulating respective carriers of the four types of OFDM symbols. The pilot signal insertion unit is configured to insert, with respect to first and second transmission signals, pilot signals having a meaningful value and pilot signals of null signals; insert, with respect to third and fourth transmission signals, pilot signals having a meaningful value, pilot signals obtained by inverting codes of the pilot signals having a meaningful value, and pilot signals of null signals; insert, with respect to the first and third transmission signals, the pilot signals of null signals in identical predetermined positions; and insert, with respect to the second and fourth transmission signals, the pilot signals of null signals in positions different from the identical predetermined positions.

主权项

1. A transmission apparatus for transmitting four OFDM signals from four transmission antennas, the transmission apparatus comprising:
a pilot signal insertion unit configured to generate four types of OFDM symbols by inserting pilot signals of different patterns into four types of transmission signals; and an OFDM signal generation unit configured to generate four OFDM signals by modulating respective carriers of the four types of OFDM symbols, wherein the pilot signal insertion unit is configured to: insert, with respect to first and second transmission signals, pilot signals having a meaningful value and pilot signals of null signals; insert, with respect to third and fourth transmission signals, pilot signals having a meaningful value, pilot signals obtained by inverting codes of the pilot signals having a meaningful value, and pilot signals of null signals; insert, with respect to the first and third transmission signals, the pilot signals of null signals in identical predetermined positions; and insert, with respect to the second and fourth transmission signals, the pilot signals of null signals in positions different from the identical predetermined positions.