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US 8,009,553 B2Granted
Signal generating apparatus and signal generation method
AssigneeNEC Corporation
InventorKenji Koyanagi
Life of this patent
Estimating the term…
Abstract
A signal generating apparatus, which is adapted for outputting a multicarrier signal where data are multiplexed with respect to a plurality of subcarriers, includes: a rotation sequence selection signal generator for generating a plurality of rotation sequence selection signal sequences which vary the phase relationship between subcarriers on the basis of a plurality of phase rotation sequences and include the number of samples, which are smaller than that of actual transmission signals; and a minimum peak power signal generator for selecting a signal of which peak power becomes minimum from the plurality of rotation sequence selection signals to generate an actual transmission signal by using a phase rotation sequence multiplied with respect to the selected signal.
Claims17
A signal generating apparatus adapted for outputting a multicarrier signal in which data are multiplexed with respect to a plurality of subcarriers, comprising:
- a data symbol information generator for generating, as resource assignment information, information indicating E subcarriers assigned within all F subcarriers which are equal to the number of points of inverse Fourier transform, F being an integer equal to 2 or more, and E being an integer equal to F or less;
- a phase rotation sequence generator for receiving, as an input, the resource assignment information to extract, from the resource assignment information, the number E of the assigned subcarriers to generate first to N-th phase rotation sequences each of which includes E phase rotation coefficients, N being an integer equal to 2 or more;
- a data sequence generator for receiving, as an input, the resource assignment information to extract, from the resource assignment information, the number E of the assigned subcarriers to generate one data symbol sequence including E data symbols;
- a rotation sequence selection signal generator for receiving, as inputs, the first to the N-th phase rotation sequences, the data symbol sequence and the resource assignment information to generate, respectively in correspondence with the first to the N-th phase rotation sequences, the first to the N-th rotation sequence selection signal sequences on a time axis each of which includes G samples, G being a natural number less than F;
- and
- a minimum peak power signal generator for receiving, as inputs, the first to the N-th rotation sequence selection signal sequences, the first to the N-th phase rotation sequences, the data symbol sequence and the resource assignment information to select, as an optimum rotation sequence selection signal sequence, a rotation sequence selection signal sequence of which peak power becomes minimum among the first to the N-th rotation sequence selection signal sequences, and generating a transmission signal on the time axis including F samples by using the phase rotation sequence corresponding to the optimum rotation sequence selection signal sequence, the data symbol sequence and the resource assignment information.
3 more elements
A signal generation method of outputting a multicarrier signal where data are multiplexed with respect to plural subcarriers, the signal generation method comprising:
- generating, as resource assignment information, information indicating E subcarriers assigned within all F subcarriers which are equal to the number of points of inverse Fourier transform, F being an integer equal to 2 or more, and E being an integer equal to F or less;
- extracting the number of E of the assigned subcarriers on the basis of the resource assignment information to generate the first to the N-th phase rotation sequences each including E phase rotation coefficients, N being an integer equal to 2 or more;
- extracting the number E of the assigned subcarriers on the basis of the resource assignment information to generate one data symbol sequence including E data symbols;
- generating, respectively in correspondence with the first to the N-th phase rotation sequences, the first to the N-th rotation sequence selection signal sequences on a time axis each including G samples on the basis of the first to the N-th phase rotation sequences, the data symbol sequence and the resource assignment information, G being a natural number less than F;
- and
- selecting, as an optimum rotation sequence selection signal sequence, a rotation sequence selection signal sequence of which peak power becomes minimum of the first to the N-th rotation sequence selection signal sequences on the basis of the first to the N-th rotation sequence selection signal sequences, the first to the N-th phase rotation sequences, the data symbol sequence and the resource assignment information to generate a transmission signal on the time axis including F samples by using the phase rotation sequence corresponding to the optimum rotation sequence selection signal sequence, the data symbol sequence and the resource assignment information.
3 more elements
A non-transitory computer readable recording medium in which there is stored a program for allowing a computer to output a multicarrier signal where data are multiplexed with respect to plural subcarriers to execute:
- a processing to generate, as resource assignment information, information indicating E subcarriers assigned within all F subcarriers which are equal to the number of points of inverse Fourier transform, F being an integer equal to 2 or more, and E being an integer equal to F or less;
- a processing to extract the number E of the assigned subcarriers on the basis of the resource assignment information to generate the first to the N-th phase rotation sequences each including E phase rotation coefficients, N being an integer equal to 2 or more;
- a processing to extract the number E of subcarriers assigned on the basis of the resource assignment information to generate one data symbol sequence including E data symbols;
- a processing to generate, respectively in correspondence with the first to the N-th phase rotation sequences, the first to the N-th rotation sequence selection signal sequences on a time axis, each including G samples on the basis of the first to the N-th phase rotation sequences, the data symbol sequence and the resource assignment information, G being a natural number less than F;
- and
- a processing to select, as an optimum rotation sequence selection signal sequence, a rotation sequence selection signal sequence of which peak power becomes minimum of the first to the N-th rotation sequence selection signal sequences on the basis of the first to the N-th rotation sequence selection signal sequences, the first to the N-th phase rotation sequences, the data symbol sequence and the resource assignment information to generate a transmission signal on the time axis including F samples by using the phase rotation sequence corresponding to the optimum rotation sequence selection signal sequence, the data symbol sequence and the resource assignment information.
3 more elements
Dependencies are inferred from the claim text.