17528100. DEMODULATION REFERENCE SIGNAL PRECODING IN HIGH-DOPPLER SCENARIOS simplified abstract (QUALCOMM Incorporated)
DEMODULATION REFERENCE SIGNAL PRECODING IN HIGH-DOPPLER SCENARIOS
Organization Name
Inventor(s)
Raviteja Patchava of San Diego CA (US)
Morteza Soltani of San Diego CA (US)
Xiaoxia Zhang of San Diego CA (US)
DEMODULATION REFERENCE SIGNAL PRECODING IN HIGH-DOPPLER SCENARIOS - A simplified explanation of the abstract
This abstract first appeared for US patent application 17528100 titled 'DEMODULATION REFERENCE SIGNAL PRECODING IN HIGH-DOPPLER SCENARIOS
Simplified Explanation
This patent application describes a system for demodulation reference signal (DMRS) precoding in high-Doppler scenarios. The system allows for different precodings for different portions of a signal, such as DMRS symbols and information symbols.
- The system receives a signal with an OTFS precoded first waveform portion carrying DMRS symbols and an OFDM precoded second waveform portion carrying information symbols.
- The OTFS precoded DMRS symbols are transformed from a time-frequency domain to a delay-Doppler domain.
- The DMRS symbols are used to estimate a delay-Doppler channel.
- The delay-Doppler channel estimate is used to measure inter-carrier interference (ICI).
- The ICI measurement is used to receive the information symbols carried by the OFDM precoded second waveform portion.
Potential Applications
- Wireless communication systems
- High-speed data transmission
- Mobile networks
Problems Solved
- Demodulation reference signal (DMRS) precoding in high-Doppler scenarios
- Interference caused by high-Doppler scenarios
Benefits
- Improved demodulation performance in high-Doppler scenarios
- More accurate estimation of delay-Doppler channel
- Reduced inter-carrier interference (ICI)
Original Abstract Submitted
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for demodulation reference signal (DMRS) precoding in high-Doppler scenarios. In some aspects, communicating devices may support different precodings for different portions of a signal, such as for a DMRS portion and an information portion. For example, a device may receive a signal including an orthogonal time-frequency space (OTFS) precoded first waveform portion carrying DMRS symbols and an orthogonal frequency division multiplexing (OFDM) precoded second waveform portion carrying information symbols. The device may transform the OTFS precoded DMRS symbols from a time-frequency domain to a delay-Doppler domain, may use the DMRS symbols to estimate a delay-Doppler channel, and may use the delay-Doppler channel estimate to measure an inter-carrier interference (ICI). The receiving device may use the ICI measurement to receive the information symbols carried by the OFDM precoded second waveform portion.
