Method for reducing PAR of carrier signal
A multi-carrier signal and multi-carrier technology, applied in the direction of multi-frequency code system, etc., can solve the problems of unexplained carrier matching filter coefficient gain adjustment, increased hardware implementation cost and difficulty, and very high requirements for the number of filter taps, so as to reduce Multiplier and logic resources, reduced complexity and resource consumption, good peak clipping effect
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[0041] In the base station transmitter of the wireless communication system, the input signal with a large peak-to-average ratio reduces the efficiency of the power amplifier. For multi-carrier combined signals, such as code division multiple access systems, the problem becomes more prominent. Use the peak clipping technology to reduce the peak-to-average ratio of the multi-carrier combined signal entering the power amplifier, so as to improve the efficiency of the power amplifier.
[0042] Such asfigure 1 As shown, it is a schematic diagram of the formation of the multi-carrier signal and the location of the multi-carrier peak clipping unit in the present invention. The multi-carrier digital up-conversion (DUC) unit is used as a digital intermediate frequency filter, including a root-raised cosine interpolation filter (CRRC), a half-band interpolation filter (HBF) and a stacked integral comb interpolation filter ( CIC), which performs digital intermediate frequency signal int...
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