Apparatus and method for minimizing peak to average power ratio in orthogonal frequency division multiplexing communication system

The present invention relates in an orthogonal frequency-division multiplexing communication system using multiple transmission antennas in the frequency domain block code encoding / decoding apparatus and method for reducing the peak to average power ratio, this invention is an orthogonal frequency division multiplexing communication system pre-encoder that in the transmission apparatus to minimize the peak to average power ratio (PAPR), generates a complex vector made up of at least one transmission antenna and the encoding to the rotation of the symbols input signal generating coded symbols in the ( Precoder), and a random mapper for mapping random (Random) in the frequency plane and an encoder for space-frequency mapping (mapping) the symbols generated by the complex vector, the symbol output is the frequency domain mapping via the plurality of transmit antennas (Random Mapper) and the frequency domain is mapped Ex The symbols output inverse fast Fourier transform (IFFT) inverse fast Fourier transformers and, receives the IFFT signal through the inverse fast Fourier transform to the gradient algorithm for reducing the peak to average power ratio (PAPR) (Gradient Algorithm) It includes parts. SFBC, MIMO, TR, PAPR, the gradient algorithm