| 摘要 |
FIELD: physics, radio. ^ SUBSTANCE: invention may be used in reverse channel of radio communication systems of multiple access with orthogonally frequency-multiplexed signals (OFDMA), in particular, in compliance with standard 802.16. Method for assessment of reverse channel of OFDMA system consists of two stages. At the first stage correction of pilot symbols is carried out with the help of regression, and at the second stage, by means of interpolation of the first order of pilot symbols, correction of modulated data is carried out. Compared to interpolation, regression is less sensitive to accuracy of pilot signals assessment than interpolation. However, regression is more efficient for monotonous curves. Therefore, in stated method adaptive regression window is introduced, size of which is selected so that sequence of pilot signals in window is, first, monotonous, and second is sufficient for assessment of channel at specified ratio of signal/noise. Invention makes it possible to increase accuracy of communication channel assessment and therefore, to improve noise immunity of signals reception in reverse channel of radio communication systems of multiple access with orthogonal frequency multiplexed signals. ^ EFFECT: makes it possible to increase accuracy of communication channel assessment and therefore, to improve noise immunity of signals reception in reverse channel of radio communication systems of multiple access with orthogonal frequency multiplexed signals. ^ 3 cl, 7 dwg |
