Methods and systems for papr reduction in sc-fdma systems
AssigneeQUALCOMM Incorporated
InventorsMadihally J. Narasimha, Je Woo Kim, Yuanning Yu, Jong Hyeon Park
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Abstract
Certain embodiments of the present disclosure relate to methods for peak-to-average power ratio (PAPR) reduction of a transmission signal in a single carrier frequency division multiple access (SC-FDMA) system. The proposed methods and systems are based on manipulations of an SC-FDMA transmission signal in a time- and/or a frequency-domain.
Claims56
A transmission method for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising:
- performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- performing a time-to-frequency transform on the first sequence of samples to obtain a second sequence of samples;
- performing a frequency-domain manipulation of the second sequence of samples to obtain a third sequence of samples;
- performing a frequency-to-time transform on the third sequence of samples to obtain a fourth sequence of samples, where a number of samples of the fourth sequence is greater than a number of samples of the second sequence;
- performing a parallel-to-serial conversion of the fourth sequence of samples to obtain a fifth sequence of samples;
- and
- transmitting the fifth sequence of samples over a wireless channel.
A transmission method for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising:
- performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- performing a time-domain manipulation of the first sequence of samples to obtain a second sequence of samples;
- performing a time-to-frequency transform on the second sequence of samples to obtain a third sequence of samples;
- performing a frequency-domain manipulation of the third sequence of samples to obtain a fourth sequence of samples;
- performing a frequency-to-time transform on the fourth sequence of samples to obtain a fifth sequence of samples, where a number of samples of the fifth sequence is greater than a number of samples of the third sequence;
- performing a parallel-to-serial conversion of the fifth sequence of samples to obtain a sixth sequence of samples;
- and
- transmitting the sixth sequence of samples over a wireless channel.
An apparatus for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising:
- logic for performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- logic for performing a time-to-frequency transform on the first sequence of samples to obtain a second sequence of samples;
- logic for performing a frequency-domain manipulation of the second sequence of samples to obtain a third sequence of samples;
- logic for performing a frequency-to-time transform on the third sequence of samples to obtain a fourth sequence of samples, where a number of samples of the fourth sequence is greater than a number of samples of the second sequence;
- logic for performing a parallel-to-serial conversion of the fourth sequence of samples to obtain a fifth sequence of samples;
- and
- logic for transmitting the fifth sequence of samples over a wireless channel.
An apparatus for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising:
- logic for performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- logic for performing a time-domain manipulation of the first sequence of samples to obtain a second sequence of samples;
- logic for performing a time-to-frequency transform on the second sequence of samples to obtain a third sequence of samples;
- logic for performing a frequency-domain manipulation of the third sequence of samples to obtain a fourth sequence of samples;
- logic for performing a frequency-to-time transform on the fourth sequence of samples to obtain a fifth sequence of samples, where a number of samples of the fifth sequence is greater than a number of samples of the third sequence;
- logic for performing a parallel-to-serial conversion of the fifth sequence of samples to obtain a sixth sequence of samples;
- and
- logic for transmitting the sixth sequence of samples over a wireless channel.
An apparatus for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising:
- means for performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- means for performing a time-to-frequency transform on the first sequence of samples to obtain a second sequence of samples;
- means for performing a frequency-domain manipulation of the second sequence of samples to obtain a third sequence of samples;
- means for performing a frequency-to-time transform on the third sequence of samples to obtain a fourth sequence of samples, where a number of samples of the fourth sequence is greater than a number of samples of the second sequence;
- means for performing a parallel-to-serial conversion of the fourth sequence of samples to obtain a fifth sequence of samples;
- and
- means for transmitting the fifth sequence of samples over a wireless channel.
An apparatus for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising:
- means for performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- means for performing a time-domain manipulation of the first sequence of samples to obtain a second sequence of samples;
- means for performing a time-to-frequency transform on the second sequence of samples to obtain a third sequence of samples;
- means for performing a frequency-domain manipulation of the third sequence of samples to obtain a fourth sequence of samples;
- means for performing a frequency-to-time transform on the fourth sequence of samples to obtain a fifth sequence of samples, where a number of samples of the fifth sequence is greater than a number of samples of the third sequence;
- means for performing a parallel-to-serial conversion of the fifth sequence of samples to obtain a sixth sequence of samples;
- and
- means for transmitting the sixth sequence of samples over a wireless channel.
A computer-program product for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising a computer-readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:
- instructions for performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- instructions for performing a time-to-frequency transform on the first sequence of samples to obtain a second sequence of samples;
- instructions for performing a frequency-domain manipulation of the second sequence of samples to obtain a third sequence of samples;
- instructions for performing a frequency-to-time transform on the third sequence of samples to obtain a fourth sequence of samples, where a number of samples of the fourth sequence is greater than a number of samples of the second sequence;
- instructions for performing a parallel-to-serial conversion of the fourth sequence of samples to obtain a fifth sequence of samples;
- and
- instructions for transmitting the fifth sequence of samples over a wireless channel.
A computer-program product for a communication system using single carrier frequency division multiple access (SC-FDMA), comprising a computer-readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:
- instructions for performing a serial-to-parallel conversion of modulated symbols of data to obtain a first sequence of samples;
- instructions for performing a time-domain manipulation of the first sequence of samples to obtain a second sequence of samples;
- instructions for performing a time-to-frequency transform on the second sequence of samples to obtain a third sequence of samples;
- instructions for performing a frequency-domain manipulation of the third sequence of samples to obtain a fourth sequence of samples;
- instructions for performing a frequency-to-time transform on the fourth sequence of samples to obtain a fifth sequence of samples, where a number of samples of the fifth sequence is greater than a number of samples of the third sequence;
- instructions for performing a parallel-to-serial conversion of the fifth sequence of samples to obtain a sixth sequence of samples;
- and
- instructions for transmitting the sixth sequence of samples over a wireless channel.
Dependencies are inferred from the claim text.