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Method and device for asynchronous ofdma/sc-fdma

A technology of synchronization reference, electronic device, applied in the direction of synchronization signal speed/phase control, multiple use of transmission path, modulated carrier system, etc., can solve the problem of peak-to-average power ratio time domain tailing and so on

Active Publication Date: 2018-05-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using OFDM / OQAM has problems such as peak-to-average power ratio (PAPR), multiple-input multiple-output (MIMO) transmission, and time-domain smearing

Method used

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  • Method and device for asynchronous ofdma/sc-fdma
  • Method and device for asynchronous ofdma/sc-fdma
  • Method and device for asynchronous ofdma/sc-fdma

Examples

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Embodiment Construction

[0021] figure 1 An example communication system 100 is shown. Generally, system 100 enables multiple wireless or wireline users to send and receive data and other content. System 100 may implement one or more channel access methods such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), or Single Carrier FDMA ( SC-FDMA).

[0022] In this example, communication system 100 includes electronic devices (EDs) 110 a - 110 c , radio access networks (RANs) 120 a - 120 b , core network 130 , public switched telephone network (PSTN) 140 , Internet 150 and other networks 160 . Although in figure 1 A specific number of these components or elements are shown in , but any number of these components or elements may be included in system 100 .

[0023] EDs 110 a - 110 c are configured to operate and / or communicate in system 100 . For example, EDs 110a-110c are configured to transmit and / or rec...

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Abstract

Various disclosed embodiments include methods and systems for communicating in a wireless communication system. The method includes receiving a signal corresponding to a plurality of modulated signals, each of the plurality of modulated signals corresponding to a unique electronic device. The method includes filtering the received signal using a plurality of filters, each of the plurality of filters being matched to a corresponding filter in the corresponding electronic device to obtain a filtered signal for the corresponding electronic device . The method includes performing a Fast Fourier Transform (FFT) operation on the filtered signal to obtain demodulated data corresponding to a corresponding electronic device.

Description

[0001] This application claims the benefit of priority to US Patent Application No. 14 / 231,217, entitled "Method and Apparatus for Asynchronous OFDMS / SC-FDMA," filed March 31, 2014, the contents of which are incorporated herein by reference. technical field [0002] The present disclosure generally relates to asynchronous communications in wireless communication systems. Background technique [0003] Nowadays, Orthogonal Frequency Division Multiple Access (OFDMA) / Single Carrier-Frequency Division Multiple Access (SC-FDMA) systems are prevalent. Typically in an OFDMA system, the signals of several different users (ie, entities wishing to communicate over the communication system) are each assigned one or more unique subcarriers. Each subcarrier is generated and transmitted in such a manner that all subcarriers can be transmitted in parallel without interfering with each other. Accordingly, an independent information stream can be modulated onto each subcarrier, so that each ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/709H04L27/148
CPCH04L5/005H04L5/0066H04L27/265H04L27/26526H04L7/06H04L27/2636H04W72/046H04L27/26265H04W72/0446
Inventor 穆哈姆德·阿布多利贾明马江镭
Owner HUAWEI TECH CO LTD