Size of the signal regarding the reception signal, noise electric power, and the methodological null plural transmission symbols which appraise

摘要

Amplitude and signal-noise ratio one or explain the system and the method plural parameters are appraised of being improved such as M-QAM or concerning reception signal such as the signal of q-ASK. Amplitude of the M-QAM signal is appraised known regarding plural transmission symbols or on the basis of the phase information which it can verify. Gathering of each one of the reception symbol which corresponds to plural transmission symbols is reconstructed. In each of plural reception symbols, complex transmit data symbol multiplying the complex unit vector which possesses the phase where the mark is opposite, it forms gathering of the product. Gathering of the product is totaled and the real part of harmony of the product is decided. Totaling the absolute value of known transmission symbol, it forms the value of entire size. Was transmitted division doing the real part of harmony of the product, in harmony of the size which, it forms the appraisal of amplitude of the M-QAM signal. The second and quaternary moment of the reception sample, making use of most likely search processing or peakedness appraisal processing, amplitude of the reception signal, noise electric power, and signal-noise ratio are appraised.