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A method for improving ber in n-order continuous OFDM system with interleaved carrier index modulation

A technology of index modulation and carrier interleaving, applied in the field of N-order continuous orthogonal frequency division multiplexing technology and related signal detection technology, can solve problems such as unsatisfactory bit error rate, achieve performance improvement, reduce bit error rate, and suppress noise Effect

Inactive Publication Date: 2018-04-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

But in general, the bit error rate caused by the combination of these two technologies is still not ideal

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  • A method for improving ber in n-order continuous OFDM system with interleaved carrier index modulation
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  • A method for improving ber in n-order continuous OFDM system with interleaved carrier index modulation

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Embodiment Construction

[0024] The technical solution of the present invention will be described in detail below in combination with the embodiments and the accompanying drawings.

[0025] In this embodiment, the Matlab2014a simulation platform is used for experiments. The experimental simulation parameters are set as follows: the number of subcarriers K = 256, subcarrier configuration (L = 2, J = 1), the signal modulation method is QPSK, the oversampling multiple D = 2, the highest order of continuity between signals in N-continuous processing The number V=4, the signal in the simulation only passes through the Gaussian white noise channel, and the detection algorithm is ML detection. The present invention utilizes above-mentioned parameters to carry out experimental simulation on Matlab, and this algorithm has more excellent comprehensive performance: simulation result shows, under the environment of (L=2, J=1), QPSK modulation, modulation order V=4, all The proposed method not only effectively re...

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Abstract

The invention belongs to the technical field of wireless communication, and relates to orthogonal frequency division multiplexing, interleaved carrier index modulation technology, N-order continuous orthogonal frequency division multiplexing technology and related signal detection technology. A method for improving the BER of an N-order continuous OFDM system with interleaved carrier index modulation, first performing interleaved sub-carrier index modulation on the digitally modulated transmitted symbols, and performing N-order continuous processing on the obtained symbols, and obtaining the NC noise mean value in this step, by the The noise mean value calculates the energy adjustment factor that can make the ratio of the transmitted signal power to the noise power at each frequency point a constant value, and multiplies it with the transmitted data after ISIM modulation to complete the processing process. This method makes the noise at the higher frequency points at both ends generated by NC processing suppressed, not only effectively reduces the bit error rate of the NC-ISIM-OFDM system, but also realizes efficient out-of-band suppression of the NC-OFDM system, thereby The spectrum performance and transmission efficiency of the system are improved in a relatively balanced manner. The method of the invention effectively reduces the bit error rate of the NC-ISIM-OFDM system, thereby improving the performance of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to Orthogonal Frequency Division Multiplexing (OFDM), Interweave Subcarrier Index Modulation (ISIM) technology, N Order Continuous Orthogonal Frequency Division Multiplexing (N Order Continuous Orthogonal Frequency Division Multiplexing) ) technology and related signal detection technology. Background technique [0002] In recent years, a subcarrier index modulation (Subcarrier Index Modulation, SIM)-based OFDM technology has been proposed as a new multi-carrier transmission scheme (SIM-OFDM), which can be regarded as an extension of the spatial modulation idea in the frequency domain . The information bits of the SIM-OFDM system include two parts, one part is called "index bit", which is used to select the position of the active subcarrier in the sub-block; the other part is used as "modulation bit", which is used to modulate into constellation point symbols and pass ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L27/26
Inventor 但黎琳张驰恒彭兰魏鹏肖悦谢济全
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA