Unlock instant, AI-driven research and patent intelligence for your innovation.

Low Peak-to-Average Power Ratio Waveform Design for Frequency Multiplexing of Multiple Streams

A time-domain waveform and frequency-domain technology, applied in the field of time-domain phase ramp, can solve the problems of unfavorable communication in wireless communication systems

Active Publication Date: 2022-04-19
QUALCOMM INC
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, interleaving modulated symbols associated with different waveforms can increase the peak-to-average power ratio of uplink transmissions, and this can be detrimental for communications in wireless communication systems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low Peak-to-Average Power Ratio Waveform Design for Frequency Multiplexing of Multiple Streams
  • Low Peak-to-Average Power Ratio Waveform Design for Frequency Multiplexing of Multiple Streams
  • Low Peak-to-Average Power Ratio Waveform Design for Frequency Multiplexing of Multiple Streams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A wireless communication system may support communication between base stations and user equipment (UE). Specifically, a wireless communication system may support downlink transmissions from base stations to UEs and uplink transmissions from UEs to base stations. The uplink transmission from the UE to the base station may include data, control signals, reference signals (e.g., demodulation reference signal (DMRS)), etc., and different streams may be multiplexed on the set of frequency resources used for uplink transmission use (ie, Frequency Division Multiplexing (FDM)). In some cases, different waveforms may be mapped to interleaved subsets of the set of resources, and the subcarrier indices occupied by a particular waveform may be offset (e.g., one stream may be mapped to subcarriers 4, 7, 10, etc.). In such a case, the peak-to-average power ratio of the uplink transmission may be high, and this may lead to a decrease in throughput in the wireless communication syst...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Methods, systems and devices for wireless communications are described. A user equipment (UE) is configured with a transmit flow processor for maintaining a low peak-to-average power ratio (PAPR) for uplink transmissions. In some cases, a UE can map modulated symbols of different signals (or waveforms) to interleaved subsets of frequency resources, and this form of frequency division multiplexing (FDM) can improve uplink transmission efficiency. The PAPR. To reduce the PAPR for uplink, a transmit flow processor at the UE may support a technique for phase ramping the modulated symbols in the time domain before mapping the symbols to the frequency resources . These techniques can help ensure that the signals included in the uplink transmission are aligned in such a way that the PAPR of the uplink transmission is reduced.

Description

[0001] cross reference [0002] This application claims U.S. Patent Application No. 15 / 873,668, filed January 17, 2018, by Park et al., entitled "Low Peak-To-Average Power Ratio Waveform Design For Frequency Multiplexing of Multiple Streams," filed January 2017. Priority to U.S. Provisional Patent Application No. 62 / 448,363 by Park et al., entitled "Low Peak-To-Average Power Ratio Waveform Design For Frequency Multiplexing of MultipleStreams," filed on March 19; Each of which has been assigned to the assignee of this application. technical field [0003] In general, the following relates to wireless communications, and more particularly, the following relates to time domain phase ramping for interleaving of multiple discrete Fourier transform (DFT) spread spectrum waveforms. Background technique [0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614H04L27/2636H04L27/2621H04L27/2618H04L27/2615
Inventor S·朴W·曾P·加尔徐浩黄轶王任秋S·阿卡拉卡兰骆涛季庭方
Owner QUALCOMM INC