Compensation of uplink timing errors for non-terrestrial networks
AssigneeQUALCOMM Incorporated
InventorsSyed Hashim Ali Shah, Ayan Sengupta, Alberto Rico Alvarino, Xiao Feng Wang
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Abstract
A method for wireless communication by a user equipment (UE) includes modulating a symbol stream onto at least one subcarrier to generate an uplink signal in a frequency domain for transmitting to a receiver in a non-terrestrial network. The method also includes applying an amount of phase rotation to the at least one subcarrier in the frequency domain. The method further includes transforming the uplink signal from the frequency domain into a time domain uplink signal. The method includes transmitting the time domain uplink signal to the receiver, after applying the phase rotation to the at least one subcarrier.
Claims30
A method of wireless communication by a user equipment (UE), comprising:
- modulating a symbol stream onto at least one subcarrier to generate an uplink signal in a frequency domain for transmitting to a receiver in a non-terrestrial network;
- applying an amount of phase rotation to the at least one subcarrier in the frequency domain, the amount based on a fast Fourier transform (FFT) size;
- transforming the uplink signal from the frequency domain into a time domain uplink signal;
- and
- transmitting the time domain uplink signal to the receiver, after applying the phase rotation to the at least one subcarrier.
An apparatus for wireless communication by a user equipment (UE), comprising:
- a memory;
- and
- at least one processor coupled to the memory, the at least one processor configured:
- to modulate a symbol stream onto at least one subcarrier to generate an uplink signal in a frequency domain for transmitting to a receiver in a non-terrestrial network;
- to apply an amount of phase rotation to the at least one subcarrier in the frequency domain, the amount based on a fast Fourier transform (FFT) size;
- to transform the uplink signal from the frequency domain into a time domain uplink signal;
- and
- to transmit the time domain uplink signal to the receiver, after applying the phase rotation to the at least one subcarrier.
An apparatus for wireless communication by a user equipment (UE), comprising:
- means for modulating a symbol stream onto at least one subcarrier to generate an uplink signal in a frequency domain for transmitting to a receiver in a non-terrestrial network;
- means for applying an amount of phase rotation to the at least one subcarrier in the frequency domain, the amount based on a fast Fourier transform (FFT) size;
- means for transforming the uplink signal from the frequency domain into a time domain uplink signal;
- and
- means for transmitting the time domain uplink signal to the receiver, after applying the phase rotation to the at least one subcarrier.
A non-transitory computer-readable medium having program code recorded thereon, the program code executed by a processor at a user equipment (UE) and comprising:
- program code to modulate a symbol stream onto at least one subcarrier to generate an uplink signal in a frequency domain for transmitting to a receiver in a non-terrestrial network;
- program code to apply an amount of phase rotation to the at least one subcarrier in the frequency domain, the amount based on a fast Fourier transform (FFT) size;
- program code to transform the uplink signal from the frequency domain into a time domain uplink signal;
- and
- program code to transmit the time domain uplink signal to the receiver, after applying the phase rotation to the at least one subcarrier.
Dependencies are inferred from the claim text.