Hybrid automatic repeat request (HARQ) techniques for reducing peak-to-average power ratio (PAPR)

A wireless communication device comprising:

• at least one modem;
• at least one processor communicatively coupled with the at least one modem;
• and
• at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor in conjunction with the at least one modem, is configured to:
• obtain a plurality of information bits to be transmitted to a receiving device;
• encode the plurality of information bits as a codeword based on a forward error correcting (FEC) code;
• map at least a portion of the codeword to a plurality of first data symbols based on a first modulation scheme;
• apply an inverse Fourier transform to the plurality of first data symbols to produce a first time-domain data signal;
• detect one or more first peaks associated with the first data signal, each of the one or more first peaks representing a respective sample of the first data signal having an amplitude that exceeds a threshold amplitude level;
• reduce the amplitudes of the samples associated with the one or more first peaks to produce an amplitude-suppressed data signal;
• transmit the amplitude-suppressed data signal, over a wireless channel, to the receiving device;
• receive a negative acknowledgement (NACK) message from the receiving device responsive to the amplitude-suppressed data signal;
• and
• transmit, to the receiving device, peak suppression information or a number of bits of the codeword based on the received NACK message, the peak suppression information indicating the amplitudes of a number of the samples associated with the one or more first peaks.

A method of wireless communication, comprising:

• receiving a first data signal from a transmitting device;
• applying a Fourier transform to the first data signal to produce a plurality of first data symbols representing at least a portion of a codeword associated with a forward error correcting (FEC) code;
• detecting one or more errors in the at least portion of the codeword;
• transmitting a negative acknowledgement (NACK) message to the transmitting device based on the detected errors;
• receiving, from the transmitting device, a peak suppression signal and a second data signal responsive to the NACK message, the peak suppression signal representing one or more peak amplitude values associated with respective samples of the first data signal, the second data signal representing one or more second bits of the codeword;
• reconstructing the plurality of first data symbols based on the peak suppression signal;
• demodulating the reconstructed data symbols to recover a plurality of first bits of the codeword;
• and
• combining the plurality of first bits with the one or more second bits to reproduce the codeword.

A wireless communication device comprising:

• at least one modem;
• at least one processor communicatively coupled with the at least one modem;
• and
• at least one memory communicatively coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor in conjunction with the at least one modem, is configured to:
• receive a first data signal from a transmitting device;
• apply a Fourier transform to the first data signal to produce a plurality of first data symbols representing at least a portion of a codeword associated with a forward error correcting (FEC) code;
• detect one or more errors in the at least portion of the codeword;
• transmit a first negative acknowledgement (NACK) message to the transmitting device based on the detected errors;
• receive, from the transmitting device, a peak suppression signal and a second data signal responsive to the first NACK message, the peak suppression signal representing one or more peak amplitude values associated with respective samples of the first data signal, the second data signal representing one or more second bits of the codeword;
• reconstruct the plurality of first data symbols based on the peak suppression signal;
• demodulate the reconstructed data symbols to recover a plurality of first bits of the codeword;
• and
• combine the plurality of first bits with the one or more second bits to reproduce the codeword.