Use method and system of partial bandwidth in multi-carrier transmission system

A transmission system and partial bandwidth technology, applied in the field of network communication, can solve the problems of digital LU system packet loss/wrong packet, narrowband LU system interference, etc., to reduce interference, reduce service interruption and throughput loss, and increase flexibility Effect

Active Publication Date: 2008-01-09
XFUSION DIGITAL TECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

For the digital LU system, it will cause periodic packet loss/error packet. In

Method used

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  • Use method and system of partial bandwidth in multi-carrier transmission system
  • Use method and system of partial bandwidth in multi-carrier transmission system
  • Use method and system of partial bandwidth in multi-carrier transmission system

Examples

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[0074] The present invention provides a method and system for using part of the bandwidth in a multi-carrier transmission system. The core of the present invention is: dividing the sub-bands of the multi-carrier transmission system into a continuous set number of sub-bands, and in the sub-bands to be used The preamble sequence is inserted on the upper side, and the preamble sequence and data are sent on the sub-band where the preamble sequence is inserted.

[0075]The method of the present invention will be described in detail below with reference to the accompanying drawings. The method of the present invention is suitable for a multi-carrier transmission system (such as an OFDM system). Taking the OFDM system as an example, the specific processing flow of the embodiment of the method of the present invention is shown in FIG. 13, and includes the following steps:

[0076] Step 13-1: Divide the OFDM subband into a continuous set number of subbands.

[0077] The present invention f...

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Abstract

The method comprises: dividing the sub-band of multi carrier transmission system into preset amounts of continuous sub frequency bands; selecting the sub frequency band to be used from said sub frequency bands to insert into the leader sequence; transmitting the leader sequence and data on said selected sub frequency band inserted into the leader sequence. The system thereof comprises: send end used for dividing the sub-band of multi carrier transmission system into preset amounts of continuous sub frequency bands and selecting the sub frequency band from said sub frequency bands to insert into the leader sequence, and sending the leader frequency and data on the sub frequency band inserted into the leader frequency sequence.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method and system for using partial bandwidth in a multi-carrier transmission system. Background technique [0002] Orthogonal frequency division multiplexing (OFDM, orthogonal frequency division multiplexing) is a modulation method of digital signals. After the signal is grouped, a group of equidistant and orthogonally arranged subcarriers are simultaneously modulated by orthogonal amplitude modulation or other methods. At present, multi-carrier modulation broadband transmission technology represented by OFDM has received extensive attention. Multi-carrier transmission divides the data stream into several independent sub-data streams, each sub-data stream will have a much lower bit rate. Then, low bit rate multi-state symbols are used to modulate corresponding subcarriers, thereby forming a transmission system of multiple low rate symbols sent in parallel. OFDM is one of...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L5/0064H04L5/0007H04L5/0048H04L5/0039
Inventor 戎军吕林军
Owner XFUSION DIGITAL TECH CO LTD
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