Multi-carrier Communication System and Its Channel Estimation Method

Abstract

The invention discloses a multi-carrier communication system, including a transmitting end device and a receiving end device; according to a time period, the transmitting end device processes multiple original symbols and transmits them to multiple subcarrier channels, while the receiving end device processes and Multiple received symbols from the multiple subcarrier channels are detected. In the time frame for transmitting data, the initial three original symbols of each sub-carrier channel are the preamble composed of the given three pilot symbols, and the three adjacent symbols of each sub-carrier channel are The preamble constitutes a preamble unit, and all pilot symbols of the preamble unit are represented by a 3x3 matrix. When the central pilot symbol of the preamble unit is normalized to 1 or j, the matrix is: or The present invention also discloses a channel estimation method of the multi-carrier communication system.

Description

technical field [0001] The present invention relates to a wireless or broadband communication technology, and in particular to a channel estimation method of a multi-carrier communication system in the wireless or broadband communication technology. Background technique [0002] In wireless or broadband communication, signal transmission is one of the key technologies. In order to increase the amount of data transmission, multicarrier modulation (multicarrier modulation) has been proposed, and is regarded as an important signal transmission technology, which can be applied in wireless or broadband communication. In further research and development, a filter bank multicarrier (FBMC) system using offset quadrature amplitude modulation (OQAM) is also proposed subsequently. [0003] The architecture of a filter bank multi-carrier (FBMC / OQAM) system using offset quadrature amplitude modulation (hereinafter referred to as FBMC / OQAM) system includes a plurality of sub-carrier chan...

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Problems solved by technology

[0004] However, one of the problems faced by the FBMC / OQAM system is that there must be enough channel estimation accuracy to correctly parse the transmitted original symbols at the receiving end

[0005] Although the traditional technology proposes to transmit some given preamble data before actually transmitting data, so as to allow the receiving end device to estimate the frequency response of each channel, some noise will inevitably be introduced during the transmission process of wireless or broadband communication channel estimation error caused by interference or interference, and how to reduce this error is one of the key points to be considered in the design of wireless or broadband communication systems

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