Receiving Method of Double Scattered Signal Components in Grid Multi-Carrier Parallel Transmission System

Abstract

The invention relates to a receiving method of double-scattering signal components in a lattice multi-carrier parallel transmission system. According to the method, a new time-frequency filter group is constructed on inverse lattices corresponding to time-frequency lattices which send signals, so that the receiving of signal scattering components can be realized; by means of compactness simplification, signal scattering component receiving under a fast moving environment can be completed quickly; and therefore, the problem of the loss of information of a part of signal scattering components which is caused by the incompleteness of a filter group existing in a traditional receiver can be solved fundamentally, and compression redundancy and decoding performance can be both improved to a greater extent. With the receiving method of the invention adopted, defects in the receiving and processing of lattice orthogonal frequency division multiplexing (LOFDM) multi-carrier signals can be eliminated; the reliability of lattice multi-carrier data parallel transmission under the fast moving environment can be improved significantly; and the novel receiving of the lattice orthogonal frequency division multiplexing (LOFDM) multi-carrier signals can be realized; and based on parameter configuration adjustment, the receiving method can be used for a traditional multi-carrier system so as to improve the receiving performance of the traditional multi-carrier system.

Description

Technical field [0001] The invention belongs to the field of wireless communication technology, relates to a grid multi-carrier parallel transmission system, and is a method for receiving double-scattered signal components in a grid multi-carrier parallel transmission system. Background technique [0002] The grid multi-carrier parallel transmission LOFDM system is an improved parallel transmission scheme based on the existing Orthogonal Frequency Division Multiplexing (OFDM) system. LOFDM uses odd and even branch misaligned transmission to adjust the time-frequency position of symbol transmission. It is a hexagonal grid structure (see Reference [1]). Starting from the two-dimensional spherical filling theory, under the same Euclidean distance, this solution can further increase the sending capacity of the end symbol under a given frequency band resource, and improve the use efficiency of spectrum resources. Grid multi-carrier parallel transmission LOFDM system is a transmission...

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Problems solved by technology

[0011] The purpose of the present invention is to solve the more prominent problems such as air signal distortion and time-frequency domain energy scattering in the grid multi-carrier parallel transmission system in the transmission process, and the resulting serious adjacent channel interference and long symbol crosstalk. Based on the special grid structure characteristics of the LOFDM signal in the carrier parallel transmission system, a new type of two-dimensional receive filter bank structure and corresponding parameter configuration that can effectively complete the reception of scattered components is proposed

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