Rakuten Symphony, Inc.

Kiran Kumar Pusarla

Venkatesh Hampasandra Muralidhara

Techniques are provided for receiving PUSCH and PUCCH transmitted by a high speed transmitter. The techniques include calculating a phase difference of OFDM symbols of the PUCCH from OFDM symbols of a first DM-RS and OFDM symbols of a second DM-RS of the PUCCH, correlating the OFDM symbols of the first DM-RS and second DM-RS. Determine a doppler shift and report it to L2. Compensate channel estimates and data symbols with the doppler shift. Equalize and demodulate the PUCCH. Perform a first level of phase correction on the PUSCH by correcting the phase on output samples of an IDFT from the doppler shift received from L2. Measure a phase deviation on the output of the first level of phase correction, accumulate the measured phase deviation and the doppler shift received from L2, to derive an accumulated phase correction, and report the accumulated phase correction to L2. Demodulate the PUSCH.

Network side receiver for receiving high velocity transmitted signals

Techniques for receiving a PUSCH and a PUCCH transmitted by a high speed transmitter are provided including calculating a phase difference of OFDM symbols of the PUCCH from: OFDM symbols of a first and second DM-RS, OFDM symbols of the second and third DM-RS, and OFDM symbols of the first and third DM-RS. Correlating the OFDM symbols across all the DM-RS. Determining a doppler shift which is reported to Layer 2. Compensating channel estimates and data symbols with the doppler shift. Performing a first level of phase correction on the PUSCH by correcting the phase on output samples of an IDFT from the doppler shift received from Layer 2. Measuring a phase deviation on the output of the first level of phase correction, and accumulating the measured phase deviation and the received doppler shift. Reporting the accumulated phase correction to Layer 2, and performing a second level of phase correction.

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Bengaluru, India

Kiran Kumar Pusarla