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Multi-antenna ofdm index modulation method based on cyclic shift

A modulation method and multi-antenna technology, applied in the field of communication, to achieve the effect of overcoming complex mapping problems, good performance, and overcoming interference between subcarriers

Active Publication Date: 2019-01-08
XIDIAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

This method is only suitable for information transmission in static or low mobility wireless communication scenarios where there is no inter-subcarrier interference

Method used

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  • Multi-antenna ofdm index modulation method based on cyclic shift
  • Multi-antenna ofdm index modulation method based on cyclic shift
  • Multi-antenna ofdm index modulation method based on cyclic shift

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Embodiment Construction

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] The present invention can be used in high-speed mobile terminal communication scenarios, using the cyclic shift-based OFDM index modulation method to generate frequency domain signals, and perform signal transmission in a multiple-input multiple-output system. In the high-speed mobile terminal communication scenario, the number of transmit antennas and the number of receive antennas are N respectively. t and N r , the number of subcarriers is N.

[0026] Exponential modulation technology is a new technology proposed in recent years, and the multi-antenna OFDM exponential modulation based on cyclic shift in the present invention is a generalization of traditional exponential modulation. Since cyclic shift-based multi-antenna OFDM exponential modulation can utilize subcarrier positions and passive antennas to transmit information, cyclic shift-based OFDM exponenti...

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Abstract

The invention discloses a multi-antenna OFDM index modulation method based on cyclic shift, used for mainly solving the problem that the error bit performance of a system is relatively poor in high-speed mobile terminal communication. The technical scheme comprises the following steps of: (1), performing multi-antenna frequency-domain signal design of source information based on cyclic shift to obtain a frequency-domain signal; (2), performing OFDM modulation of the frequency-domain signal to obtain a modulated signal; (3), transmitting the modulated signal in a channel to obtain a received signal; (4), demodulating the received signal by a receiving end to obtain a demodulated signal; and (5), detecting the demodulated signal by the receiving end to obtain an estimated signal, such that the signal transmission process is completed, wherein the step (1) and the step (2) are completed in a transmitting end; the step (3) is completed in the channel; and both the step (4) and the step (5) are completed in the receiving end. The multi-antenna OFDM index modulation method disclosed by the invention has the advantages of being relatively low in bit error rate, simple to implement and high in system information transmission rate; and thus, the multi-antenna OFDM index modulation method is particularly suitable for a high-speed mobile terminal communication scene.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an orthogonal frequency division multiplexing OFDM index modulation method, which can be used for information transmission in high-speed mobile wireless communication scenarios. Background technique [0002] In the OFDM system, the system bandwidth is divided into multiple sub-bands, and each sub-band, also called sub-carrier, is orthogonal to each other. The system antenna is composed of a transmitting antenna and a receiving antenna. The number of the two antennas can be a single or a multiple roots. An OFDM system using multiple transmit and receive antennas is called a multi-antenna OFDM system. The number of transmit antennas in a multi-antenna OFDM system is denoted as N t , the number of receiving antennas is denoted as N r , and the number of subcarriers is denoted as N. When the communication terminal moves at a high speed, the orthogonality between...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2627H04L27/2649
Inventor 郑贱平姚芳超
Owner XIDIAN UNIV
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