Receiving apparatus and method
AssigneeFujitsu Limited
InventorTsuyoshi Hasegawa
Life of this patent
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Abstract
A receiving apparatus includes a first transform unit configured to perform orthogonal transform on a time-domain input signal and perform saturation when an overflow occurs to transform the input signal into a plurality of frequency-domain signals, a second transform unit configured to perform orthogonal transform on the time-domain input signal while restricting the number of bits during orthogonal transform and continue operations while not performing saturation when at least one of the operations overflows and leaving the operation overflowing to transform the input signal into a plurality of frequency-domain signals, and a bit restricting control unit configured to control the number of bits during orthogonal transform by the second transform unit based on output signals of the first transform unit.
Claims10
A receiving apparatus comprising:
- a first transform unit configured to perform orthogonal transform on a time-domain input signal and perform saturation when an overflow occurs to transform the input signal into a plurality of frequency-domain signals;
- a second transform unit configured to perform orthogonal transform on the time-domain input signal while restricting a number of bits during orthogonal transform and continue operations while not performing saturation when at least one of the operations overflows and leaving the at least one operation overflowing to transform the input signal into a plurality of frequency-domain signals;
- and
- a bit restricting control unit configured to control the number of bits during orthogonal transform by the second transform unit based on output signals of the first transform unit.
A receiving method performed by a receiving apparatus, comprising:
- performing orthogonal transform on an input signal in a time domain and performing saturation when an overflow occurs to transform the input signal into a plurality of first signals in a frequency domain;
- controlling a number of bits during orthogonal transform based on the first signals;
- performing orthogonal transform on the time-domain input signal while restricting the number of bits during orthogonal transform based on a result of control and continuing operations while not performing saturation when at least one of the operations overflows and leaving the at least one operation overflowing to transform the input signal into a plurality of second signals;
- and
- outputting the second signals as a result of orthogonal transform.
Dependencies are inferred from the claim text.