Techniques for improving waveform reliability in wireless communications
AssigneeQUALCOMM Incorporated
InventorsIyab Issam Sakhnini, Hemant Saggar, Tao Luo
Life of this patent
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Abstract
Aspects described herein relate to adding a set of redundant subcarriers to a set of data subcarriers to be transmitted in a unique-word orthogonal frequency division multiplexing (UW-OFDM) waveform, interleaving, based on a permutation matrix, the set of redundant subcarriers with the set of data subcarriers to generate a permutation of subcarriers, mapping the permutation of subcarriers as input to an inverse fast Fourier transform (IFFT), and generating the UW-OFDM waveform based on output of the IFFT. Other aspects relate to receiving and processing the UW-OFDM waveform.
Claims26
An apparatus for wireless communication, comprising:
- a transceiver;
- a memory configured to store instructions;
- one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
- add a set of redundant subcarriers to a set of data subcarriers to be transmitted in a unique-word orthogonal frequency division multiplexing (UW-OFDM) waveform, wherein the set of redundant subcarriers is based at least on multiple head samples and multiple tail samples to be included in the UW-OFDM waveform;
- interleave, based on a permutation matrix, the set of redundant subcarriers with the set of data subcarriers to generate a permutation of subcarriers;
- map the permutation of subcarriers as input to an inverse fast Fourier transform (IFFT);
- and
- generate the UW-OFDM waveform based on output of the IFFT.
An apparatus for wireless communication, comprising:
- a transceiver;
- a memory configured to store instructions;
- one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
- receive a unique-word orthogonal frequency division multiplexing (UW-OFDM) waveform;
- generate a mapping of subcarriers by performing a fast Fourier transform (FFT) of the UW-OFDM waveform;
- demap, from the mapping of subcarriers, a permutation of a set of redundant subcarriers and a set of data subcarriers, wherein the set of redundant subcarriers is based at least on multiple head samples and multiple tail samples included in the UW-OFDM waveform;
- separate, based on a permutation matrix, the permutation of the set of redundant subcarriers and the set of data subcarriers;
- and
- process the set of data subcarriers to obtain data transmitted in the UW-OFDM waveform.
A method for wireless communications, comprising:
- adding a set of redundant subcarriers to a set of data subcarriers to be transmitted in a unique-word orthogonal frequency division multiplexing (UW-OFDM) waveform, wherein the set of redundant subcarriers is based at least on multiple head samples and multiple tail samples to be included in the UW-OFDM waveform;
- interleaving, based on a permutation matrix, the set of redundant subcarriers with the set of data subcarriers to generate a permutation of subcarriers;
- mapping the permutation of subcarriers as input to an inverse fast Fourier transform (IFFT);
- and
- generating the UW-OFDM waveform based on output of the IFFT.
A method for wireless communications, comprising:
- receiving a unique-word orthogonal frequency division multiplexing (UW-OFDM) waveform;
- generating a mapping of subcarriers by performing a fast Fourier transform (FFT) of the UW-OFDM waveform;
- demapping, from the mapping of subcarriers, a permutation of a set of redundant subcarriers and a set of data subcarriers, wherein the set of redundant subcarriers is based at least on multiple head samples and multiple tail samples included in the UW-OFDM waveform;
- separating, based on a permutation matrix, the permutation of the set of redundant subcarriers and the set of data subcarriers;
- and
- processing the set of data subcarriers to obtain data transmitted in the UW-OFDM waveform.
Dependencies are inferred from the claim text.