Method and apparatus for detecting radio signal

摘要

In an aspect, a method for transmitting data in a wireless communication system is provided. A wireless device determines a subcarrier and a subcarrier group to which a data sequence is allocated. The wireless device modulates the data sequence by a transmit filter to generate a data stream. A waveform of the transmit filter is determined based on the subcarrier and the subcarrier group. The wireless device generates a transmission signal based on the data stream. The wireless device transmits the transmission signal through the subcarrier. The transmission signal is cyclostationary.

主权项

1. A method for transmitting data in a wireless communication system, the method comprising:
determining, by a wireless device, a subcarrier and a subcarrier group to which a data sequence is allocated; modulating, by the wireless device, the data sequence by a transmit filter to generate a data stream, a waveform of the transmit filter determined based on the subcarrier and the subcarrier group; generating, by the wireless device, a transmission signal based on the data stream; and transmitting, by the wireless device, the transmission signal through the subcarrier, wherein the transmission signal is cyclostationary, wherein the data sequence is a sth data sequence allocated to a nth subcarrier group, and the waveform of the transmit filter sn,s(t) is determined by one of following equations,sn,s⁡(t)=∑l=1L⁢g~⁡(t)⁢(αn,s,l⁢ⅇj⁢⁢2⁢⁢π⁡(fl+n-12⁢⁢NT)⁢t+αn,s,l+L⁢ⅇ-j⁢⁢2⁢⁢π⁡(fl+n-12⁢⁢NT)⁢t) where, L is a natural number determined based on a bandwidth of the wireless communication system and a cycle period of the transmission signal, αn,s,l is a complex-valued weighting factor determining a power and a phase of the subcarrier, N is a number of subcarrier groups, T is a cycle period, {tilde over (g)}(t) is a function of which Fourier transform function {tilde over (G)}(f) is defined by a following equation,G~⁡(f)⁢=Δ⁢⁢{g~⁡(t)}={1,∀f∈[0,12⁢⁢NT)0,elsewhere.,and fl is a parameter defined by a following equation,fl⁢=Δ⁢l-⌊L/2⌋-1T where, └ ┘ is a floor function, orsn,s⁡(t)=∑l=1L⁢∑k=12⁢⁢NL⁢ [⁢αn,s,l2⁢⁢NL⁢ⅇj⁢⁢2⁢⁢π⁡(2⁢(l-1)⁢N+n)⁢k/(2⁢⁢NL)+αn,s,l+L2⁢⁢NL⁢ⅇj⁢⁢2⁢⁢π⁡(2⁢⁢lN-n+1)⁢k/(2⁢⁢NL)]⁢p⁡(t-kTc) where, L is a natural number determined based on a bandwidth of the wireless communication system and a cycle period of the transmission signal, αn,s,l is a complex-valued weighting factor determining a power and a phase of the subcarrier, N is a number of subcarrier groups, T is a cycle period, p(t) is a sinc pulse of which duration Tc is T/(2NL).