IP Library › Patent Application 16731432
Patent Application
App. No. 16/731,432

PULSE-SHAPED ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING

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Quick Facts
Patent No.
US None
App. No.
16/731,432
Abstract

A method and apparatus for performing pulse shaping using different windowing functions for different sub-bands of a transmission is disclosed. A method for use in a wireless transmit/receive unit (WTRU) may include the WTRU receiving data symbols. The WTRU may assign the data symbols to a plurality of subcarriers in different sub-bands and map the data symbols on each of the plurality of subcarriers in the different sub-bands to a plurality of corresponding subcarriers of an inverse fast Fourier transform (IFFT) block. The WTRU may take an IFFT of the block for each sub-band and pad an output of the IFFT block with a prefix and a postfix for each sub-band. The WTRU may apply a windowing function to an output of the padding for each sub-band and form a composite signal for transmission by adding an output of the windowing of each sub-band. The WTRU may transmit the signal.

Claims (24)

1 . (canceled)

2 . A method implemented by an 802.11 device for transmitting a signal, the method comprising:

mapping a plurality of data symbols on each of a plurality of subcarriers in a plurality of sub-bands;

performing an IFFT on each of the plurality of sub-bands to generate an output for each of the plurality of sub-bands;

padding the output with a prefix or a postfix for each sub-band;

applying a windowing function to the padded output for each sub-band;

forming a composite signal for transmission from each of the windowed padded output; and

transmitting the composite signal.

3 . The method of claim 2 , wherein different windowing functions are applied to different sub-bands.

4 . The method of claim 2 , wherein the prefix or the postfix is a guard interval.

5 . The method of claim 2 , wherein the subcarriers in the sub-bands are non-contiguous.

6 . The method of claim 2 , wherein the prefix for each sub-band is of a different length.

7 . An 802.11 device configured to transmit a signal, the WTRU comprising:

a processor configured to:

map a plurality of data symbols on each of a plurality of subcarriers in a plurality of sub-bands;

perform an IFFT on each of the plurality of sub-bands to generate an output signal for each of the plurality of sub-bands;

padding an output of the IFFT block with a prefix or a postfix for each sub-band;

apply a windowing function to the padded output for each sub-band;

form a composite signal for transmission from each of the windowed padded output; and

a transmitter, operatively coupled to the processor, configured to transmit the composite signal.

8 . The 802.11 device of claim 7 , wherein different windowing functions are applied to different sub-bands.

9 . The 802.11 device of claim 7 , wherein the prefix or the postfix is a guard interval.

10 . The 802.11 device of claim 7 , wherein the subcarriers in the sub-bands are non-contiguous.

11 . The 802.11 device of claim 7 , wherein the prefix for each sub-band is of a different length.