Method for realizing data flow multiplexing and multi-carrier communication system

Abstract

The key point of the invention is: the subcarriers correlated to same base node under the logical channel node allocated for the data to be transmitted by base station are discontinuously set in the entire sub-band under the physical frame; using said subcarriers to carry the data stream and to make data transmission. By the invention, the actual channel quality can make better fitting to the channel quality fed back during sub-band scheduling such that even if the user's data is transmitted in one base node, the user can also get better frequency diversity so as to improve the transmission performance of low rate users.

Description

Method for realizing data stream multiplexing and multi-carrier communication system technical field The invention relates to the field of communication, in particular to the multiplexing technology of data streams. Background technique The multi-carrier transmission technology is to decompose the data stream into several independent sub-data streams, so that each sub-data stream has a relatively low bit rate, and then use the low-rate multi-state symbols formed by the low bit rate to modulate the corresponding sub-carriers , forming multiple low-rate symbols sent in parallel. In recent years, a multi-carrier transmission technology represented by OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) has attracted widespread attention. OFDM divides the frequency spectrum into many subcarriers, each modulated with a lower data rate. By allocating different subcarriers to different users, OFDMA (Orthogonal Frequency Division Multi Ac...

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Problems solved by technology

The present invention provides a data stream multiplexing method and a multi-carrier communication system to solve the problem in the prior art that the physical channel resource block in each physical frame to which each base node is mapped consists of consecutive Nb subcarriers , which leads to the problem that when the transmission rate of user data is low, the method of frequency-selective scheduling in units of sub-bands cannot enable users to obtain frequency-selective gains

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