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OFDM communications system with method for determination of subcarrier offset for OFDM symbol generation

A technology of sub-carrier spacing and sub-carrier frequency, applied in the modulation carrier system, transmission system, wireless communication and other directions, can solve the problem of misalignment of intermediate sub-carrier frequencies, and achieve the effect of reducing overhead and reducing power/battery consumption

Pending Publication Date: 2019-10-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, due to the nested structure of the RB grid, the intermediate subcarrier frequencies of the available RB ranges of different parameter sets may not be aligned with each other

Method used

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  • OFDM communications system with method for determination of subcarrier offset for OFDM symbol generation
  • OFDM communications system with method for determination of subcarrier offset for OFDM symbol generation
  • OFDM communications system with method for determination of subcarrier offset for OFDM symbol generation

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Embodiment Construction

[0105] As mentioned above, a network can support multiple parameter sets. Features of a given parameter set may include subcarrier spacing and cyclic prefix (cyclic prefix, CP) type, among others. For example, in 5G new radio (new radio, NR), hereinafter referred to as NR, as specified in the following table (see Table 4.2-1 in 3GPP TS 38.211: "NR; Physical Channel and Modulation"), multiple parameter set:

[0106] Table 3: Different parameter sets in NR (Table 4.2-1 in TS 38.211)

[0107] mu Δf=2 μ 15[kHz]

cyclic prefix 0 15 normal 1 30 normal 2 60 normal, extended 3 120 normal 4 240 normal

[0108] In NR, in frequency band (FR) 1 (below 6GHz), the network supports the first three parameter sets in the above table, and in FR2 (above 6GHz), the network supports the last three parameter sets in the above table. The exact values ​​of frequency bands FR1 and FR2 are specified in TS38.104 as follows (see Table 5.1-1 in TS...

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Abstract

The middle subcarrier of the baseband OFDM signal of each numerology may need to be shifted appropriately with respect to other numerologies to comply with a nested grid. These shifts can be signalledto the UE with an associated overhead. Methods and systems are provided to reduce overhead for OFDM communication. Reduced overhead can translate into increased bandwidth for the system, and / or reduced power / battery consumption in the UE. A transmitter generates an OFDM signal associated with a first subcarrier spacing of a first numerology ([mu]), a middle subcarrier frequency of a set of usableresource blocks (RBs) of the first numerology being offset from a carrier frequency by a first offset having a value in units of subcarriers, the value of the first offset being defined by a specificformula. The transmitter transmits the OFDM signal according to the first subcarrier spacing and the first offset.

Description

[0001] Cross References to Related Applications [0002] This application requires U.S. Provisional Patent Application No. 62 / 631,144 filed on February 15, 2018, entitled "OFDM Communication System with Method for Determining Subcarrier Offset for OFDM Symbol Generation" and filed on November 2018 Priority to U.S. Nonprovisional Patent Application No. 16 / 199,883, entitled "OFDM Communications System with Method of Determining Subcarrier Offset for OFDM Symbol Generation," filed on March 26, which is incorporated by reference Into the text. technical field [0003] The present application relates to a communication system and method using Orthogonal Frequency Division Multiplexing (OFDM), and determining a subcarrier offset in the system and method. Background technique [0004] Flexible frame structures have been proposed in terms of the use of different parameter sets. A parameter set is defined as a collection of physical layer parameters used for specific signal air int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04L5/0044H04W52/0261H04L5/0007H04L27/26025H04L5/0092Y02D30/70H04L27/2605H04W72/0453H04L27/2657H04W74/0833
Inventor 贾瓦德·阿布多利唐臻飞
Owner HUAWEI TECH CO LTD