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A data transmission method and transmitting site based on OFDM

A data transmission method and site technology, applied in the field of OFDM-based data transmission methods and systems, can solve problems such as increasing equipment costs, and achieve the effects of avoiding interference and improving spectrum utilization

Active Publication Date: 2016-11-02
BEIJING NUFRONT MOBILE MULTIMEDIA TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the wireless local area network system, if the multiple access method of OFDMA is used in order to improve the spectrum efficiency, the equipment cost will be increased.

Method used

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  • A data transmission method and transmitting site based on OFDM
  • A data transmission method and transmitting site based on OFDM
  • A data transmission method and transmitting site based on OFDM

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Embodiment Construction

[0058] In view of the deficiencies in the prior art, the present invention proposes a multi-user data transmission scheme for medium and short-distance wireless communication, which adopts a multi-user access method similar to Orthogonal Frequency Division Multiple Access (OFDMA), based on OFDM and corresponding synchronization The mechanism divides the available frequency band of the system into N basic sub-bands (also called sub-channels). The bandwidth of the transmitter (that is, STA) transceiver can be a basic sub-band or a combination of sub-bands, and the receiving station (that is, the CAP) transceiver bandwidth may be N basic frequency sub-bands. Assume that the basic sub-band is 20MHz, the transceiver bandwidth of the receiving site can be 20MHz, 40MHz, 80MHz, that is, the STA receiver that only supports 20MHz bandwidth can also send and receive the signal of the CAP of 80MHz bandwidth, like this, the present invention can be based on OFDM modulation technology It re...

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Abstract

The invention discloses a data transmission method based on OFDM, which is used for uplink data transmission in a short-to-middle-distance wireless communication system. The available frequency band of the system is divided into N basic frequency sub-bands in advance. The method includes: the transmitting site occupies M basic frequency sub-bands Frequency band, modulate the data to the M basic sub-bands and send it out; the receiving station receives the data sent from one or more transmitting sites within the N basic sub-bands; M≤N, M and N are both positive integer. The invention also provides an OFDM-based data transmission system. The present invention is based on the combination of OFDM technology and sub-frequency bands, allowing the transmitting site and receiving site in the wireless communication system to have different bandwidth configurations, the transmitting site can use a lower configuration to reduce hardware costs, and the receiving site can use a higher configuration to improve bandwidth. Efficiency: Spectrum utilization, throughput, etc., and enables multiple user sites to communicate with access points at the same time.

Description

[0001] This application claims that the application date is March 25, 2011, the application number is 201110074380.X, the invention title is an OFDM-based data transmission method and system, and the application date is May 19, 2011 date, the application number is 201110130194.3, the title of the invention is the priority of the prior application of a communication system, and the application date is August 11, 2011, the application number is 201110230269.5, the title of the invention is a data transmission method based on OFDM and The priority of the earlier application of the system, and the application date is February 8, 2012, the application number is 201210027883.6, and the invention name is an OFDM-based data transmission method and system The priority of the earlier application, and the application date is On March 6, 2012, the application number is 201210057448.8, and the title of the invention is an OFDM-based data transmission method and transmission site. The priority...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 鲍东山曾勇波雷俊王竞姚惠娟闫志刚刘慎发
Owner BEIJING NUFRONT MOBILE MULTIMEDIA TECH
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