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System and scheme of scalable OFDM numerology

A sub-carrier spacing and second sub-technology, applied in the modulation carrier system, digital transmission system, transmission system, etc., can solve the problem that 15kHz is not wide enough

Active Publication Date: 2019-03-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For an example, in high-speed mobility scenarios (e.g., 500Km / h) that may cause high Doppler shift, a single subcarrier spacing may be limiting
For another example, in high wireless band scenarios such as the 10GHz band where phase noise may cause large frequency shifts, single subcarrier spacing may be limiting
In this case 15kHz may not be wide enough to accommodate Doppler effects in the frequency domain

Method used

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  • System and scheme of scalable OFDM numerology
  • System and scheme of scalable OFDM numerology
  • System and scheme of scalable OFDM numerology

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Embodiment Construction

[0030] In traditional wireless networks, fixed subcarrier parameters have been adopted to simplify the design. The parameters of the subcarrier parameters are usually set based on an understanding of the conventional usage of the network parameters. In future networks, more diverse needs must be served. Future networks can operate on a variety of frequencies and serve a variety of devices. Satisfying the diverse requirements of the future wireless network can be achieved according to various methods, wherein the future network can be a fifth generation (5G) wireless network. In a first method, which may be considered backward compatible with LTE, the sampling frequency and subcarrier frequency are chosen to be integer multiples of the sampling frequency and subcarrier frequency already set for LTE. In the second method, which can be considered to have so-called forward compatibility, the sampling frequency and subcarrier frequency are closely related to those set for LTE, bu...

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Abstract

For a wireless communications system, scalable orthogonal frequency division multiplexing (OFDM) numerology is incorporated in a manner that can apply to radio link transmissions in future wireless network for frequency division duplex (FDD) and time division duplex (TDD) communications.

Description

technical field [0001] The present disclosure relates to systems and methods for wireless communications, and in particular, to scalable orthogonal frequency division multiplexing (OFDM) subcarriers incorporating scalable wireless link transmissions that can be applied in wireless networks Systems and methods for numerology. Background technique [0002] In a wireless communication network, such as a network that conforms to known long-term evolution (Long-Term Evolution, LTE) standard transmission on a wireless channel, a user pre-selects subcarrier parameters. The term "subcarrier parameters" is used to refer to parameters used to define waveform transmissions. The parameters of the subcarrier parameters include subcarrier spacing, length of cyclic prefix, length of OFDM symbol, number of symbols included in Transmission Time Interval (TTI), and duration of TTI in milliseconds (ms). LTE networks typically support 15kHz subcarrier spacing across all transmission frequenci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/00
CPCH04L27/2602H04L5/0094H04W72/0453H04W72/23H04L5/0007H04L27/2646H04L27/26025H04W72/00H04W72/02
Inventor 张立清凯文·卡·勤·欧马江镭童文陶菲克尔·伊斯兰
Owner HUAWEI TECH CO LTD