Satellite receiver and satellite communication system

A satellite receiver comprising:

• N demultiplexers to each demultiplex, into a plurality of subchannel signals of a predetermined band, a digital reception signal obtained by converting a calibration signal received by a corresponding one of N receiving antenna elements into a digital signal;
• N excitation coefficient multipliers to multiply each of the plurality of subchannel signals by an excitation coefficient;
• a complex adder to add the plurality of subchannel signals that are multiplied by the excitation coefficient together for each subchannel signal of a same band;
• a correlation detector to, with use of one demultiplexer among the N demultiplexers as a reference demultiplexer, calculate a cross-correlation value for each subchannel signal output from each demultiplexer different from the reference demultiplexer with respect to a subchannel signal of a same band output from the reference demultiplexer;
• and
• an excitation coefficient generator to generate a corrected excitation coefficient that is an excitation coefficient by which the excitation coefficient multipliers multiply the subchannel signals, on a basis of a cross-correlation value calculated by the correlation detector and an excitation coefficient created in advance to form a desired reception beam, wherein
• the excitation coefficient generator includes:
• an inter-element-system error detector to calculate, on a basis of the cross-correlation value, a correction coefficient for correcting an error based on a hardware characteristic of the satellite receiver, the error being included in each of a plurality of subchannel signals obtained by a demultiplexing process performed by each of the N demultiplexers;
• and
• a multiplier to generate the corrected excitation coefficient by multiplying, by the correction coefficient, the excitation coefficient created in advance to form the desired reception beam, and
• the N is an integer of 2 or more.