The Compatibility of Linear Precoder for Blind Channel Estimation and Capacity Optimal Linear Precoder based on MIMO-OFDM Systems

摘要

PURPOSE: A compatible method with precoding for maximizing communication capacity with a linear precoding in an OFDM(Orthogonal Frequency Division Multiplexing) system which uses a multiple antennas. CONSTITUTION: OFDM modulation is demodulated(S30). A dispersion matrix is calculated in a position where an I by J of a receiving signal(S40). The calculated dispersion matrix is expressed as matrix pi(S50). A matrix j is drawn by calculating FFT(Fast Fourier Transform)(S60). Eigen vectors and eigen values are calculated from the matrix j(S70). The ambiguity of the rotation matrix is estimated in the channel estimation(S80). [Reference numerals] (S10) Linear precoding in sub carrier wave signal according to IUJ; (S20) Vertical OFDM modulation is performed after demodulating the precoding IUJ; (S30) OFDM modulation is demodulated; (S40) A dispersion matrix is calculated in a position where an I-by-J of a receiving signal; (S50) The calculated dispersion matrix is expressed as matrix pi; (S60) A matrix j is drawn by calculating FFT(Fast Fourier Transform; (S70) Eigen vectors and eigen values are calculated from the matrix j; (S80) The ambiguity of the rotation matrix is estimated in the channel estimation