Signal processing method and signal processing apparatus
AssigneeSemiconductor Technology Academic Research Center
InventorsShigetaka Takagi, Yosuke Sakai, Tetsuro Itakura, Koichiro Mashiko
Life of this patent
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Abstract
A signal processing method and apparatus reducing distortion using divided signals differing in only amplitude by weighting an input signal by first weights ki (i=1 to 4) to obtain divided signals, performing the same signal processing f(x) on the divided signals, weighting the signal processed divided signals by second weights l1 (i=1 to 4), and adding the divided signals Vout1 to Vout4 weighted by the second weights. The first weights are k1=t, k2=−t, k3=1, k4=−1, while the second weights are l1=−1, l2=1, l3=t3, l4=−t3. Here, t=b/a (where a and b are different positive integers).
Claims3
A signal processing apparatus having:
- first weighting circuits configured to weight an input signal by first weights ki (i=1 to 4) to obtain divided signals,
- signal processing circuits configured to perform the same signal processing on the divided signals,
- second weighting circuits configured to weight the signal processed divided signals by second weights Ii (i=1 to 4), and
- an adding circuit configured to add divided signals weighted by the second weights,
- the first weights being k1=t, k2=−t, k3=1, k4=−1,
- the second weights being I1=−1, I2=1, I3=t3, I4=−t3, and
- t=a/b wherein a and b are different positive integers.
Dependencies are inferred from the claim text.