Transmission and reception signal processor and method

摘要

A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

主权项

1. A transmission apparatus comprising:
(a) a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators that:
(i) generate a first OFDM modulation signal by:
inserting a first symbol for demodulation in a first plurality of subcarriers at a first time and in a second plurality of sub-carriers at a second time; andinserting a symbol, having both an in-phase (I) component and a quadrature-phase (Q) component in an I-Q plane of zero, in the second plurality of sub-carriers at the first time and in the first plurality of sub-carriers at the second time;(ii) generate a second OFDM modulation signal by:
inserting a symbol, having both an in-phase (I) component and a quadrature-phase (Q) component in the I-Q plane of zero, in the first plurality of subcarriers at the first time and in the second plurality of sub-carriers at the second time; andinserting a second symbol for demodulation in the second plurality of sub-carriers at the first time and in the first plurality of sub-carriers at the second time; and(iii) generate a third OFDM modulation signal by:
inserting a third symbol for demodulation in the first plurality of sub-carriers and the second plurality of sub-carriers at a third time; and (b) a plurality of transmitters that transmit either a combination of the first OFDM modulation signal and the second OFDM modulation signal, from respective different antennas, in an identical frequency band, or the third OFDM modulation signal, from a plurality of antennas, in an identical frequency band.