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

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...

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