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SIM-OFDM communication method

A communication method and source technology, applied in the multi-frequency code system and other directions, can solve the problems of high signal detection complexity at the receiving end and poor performance at the channel deep fading, so as to increase the minimum Euclidean distance and reduce the complexity. , the effect of improving performance

Inactive Publication Date: 2014-02-19
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] The present invention provides a SIM-OFDM communication method aiming at the technical problem that the performance of the existing SIM-OFDM communication method will deteriorate at deep channel fading and the signal detection complexity at the receiving end is too high

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Embodiment Construction

[0028] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions are omitted here.

[0029] In order to describe the present invention better, the terminology used in the technical solution of the present invention and the index modulation system transmitter structure are firstly introduced.

[0030] Combination of sending subcarriers: refers to the pre-blocking of the N subcarriers of the transmitter, and there are n subcarriers in each block, then there are a total of g=N / n sub-blocks, each sub-block does not interfere with each other, and each blocks follow the same mapping rule. For each sub-block, k sub-carriers are selected to transmit data, and the rema...

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Abstract

The invention discloses an SIM-OFDM communication method, and belongs to the communication anti-jamming technical field. The mapping method of subcarrier index modulation is improved at a transmitting end, namely a novel mapping method is introduced, so that subcarriers in each subblock are mutually independent, in this way, the minimum Euclidean distance is increased, and system performance is improved; at a receiving end, with respect to the complexity of maximum likelihood detection, a novel frequency domain detection technology is provided, hence, the maximum likelihood detection performance is achieved, and meanwhile the complexity can be extremely lowered.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, and relates to an Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing) technology, a Subcarrier Index Modulation (SIM) technology and related frequency domain detection technology. Background technique [0002] OFDM technology is a high-speed transmission technology in an infinite environment. The basic principle of this technology is to convert high-speed serial data into multiple relatively low-speed parallel data and modulate different subcarriers. This parallel transmission quality divides the signal into many orthogonal sub-carriers, and then modulates the data with the sub-carriers, thus greatly expanding the pulse width of the symbol, effectively resisting Inter-Symbol Interference (ISI), and improving performance against multipath fading. Compared with traditional frequency division multiplexing, OFDM does not require a guard band. Al...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 肖悦王顺顺但黎琳李少谦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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