Signal processing device
AssigneeTamagawa Academy & University
InventorsKen TANIZAWA, Fumio FUTAMI
Life of this patent
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Abstract
The purpose of the present invention is to improve signal modulation resolution. A coarse phase modulation element 62A modulates a signal into any of M1 (M1 is an arbitrary integer) patterns in a first range. Fine phase modulation elements 62B-1 through 62B-(k−1) respectively modulate the signal into any of M2 through Mk (M2 through Mk are arbitrary integers that are independent of each other and M1) patterns in a second range through k-th range (k is an integer of 2 or greater). A coarse DAC 61A and DACs 61B-1 through 61B-(k−1) perform control such that the second range through k-th range become narrower than the first range.
Claims4
A signal processing device, comprising:
- a first modulation element that modulates a signal to any one of M1 (M1 is an arbitrary integer) patterns in a first range;
- (k−1) (k is an integer that is greater than or equal to 2) second modulation elements that respectively modulate the signal to any one of M2 through Mk (M2 through Mk are arbitrary integers that are mutually independent of each other and M1) respective patterns in a second range through a kth range, respectively;
- and
- a control unit that controls the first range for the first modulation element and the respective second range through the kth range for the (k−1) second modulation elements,
- wherein the control unit performs control to make the respective second range through the kth range for the (k−1) second modulation elements narrower than the first range for the first modulation element.
Dependencies are inferred from the claim text.