33 results about "Transformed phase" patented technology

The invention discloses a photon terahertz OFDM (Orthogonal Frequency Division Multiplexing) system phase noise self-adaptive compensation method based on a double-branch Transform, and belongs to the field of terahertz communication. The method specifically comprises the following steps: a transmitting end performs constellation mapping on a bit stream to generate a complex symbol, performs OFDM coding, maps the complex symbol to a frequency domain subcarrier, adjusts the signal amplitude and outputs a transmitting signal to a receiving end; a receiving end performs channel estimation on the terahertz OFDM signal to obtain a channel frequency response; on the basis, OFDM decoding is carried out on the received signal, and a signal after preliminary phase correction is obtained; then, the signals are input into a phase noise neural network decoder, features of phase noise are extracted and input into a double-branch processing network for parallel processing, phase noise compensated signals output by a Transform phase estimation branch and enhanced signals output by a CNN signal enhancement branch are obtained, and self-adaptive fusion processing is carried out based on confidence score; and finally, demapping to obtain a final result. According to the invention, the influence of phase noise on the system performance is relieved, and the bit error rate performance is improved.