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A technology of index modulation and mapping method, which is applied in the direction of modulation carrier system, digital transmission system, electrical components, etc., can solve the problems of bit error rate performance loss, etc., and achieve the effect of reducing bit error rate and reducing Hamming distance
Active Publication Date: 2021-06-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0005] Aiming at the defects and improvement needs of the prior art, the present invention provides an index modulation mapping method, which aims to solve the problem of bit error rate caused by random selection of effective index combination sets and random matching of bit information for index combinations in existing index modulation techniques. Technical issues with performance loss
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Embodiment 1
[0054] An indexed modulation mapping method such as figure 1 shown, including:
[0055] (1) Obtain all N under the index modulation parameter all index combination, and construct a graph theory model with the index combination as the vertex; in the graph theory model, if and only if the number of different elements in the two index combinations is n err , there is an edge between the corresponding two vertices;
[0056] The index modulation mapping method provided by the embodiment of the present invention is applicable to index modulation technologies in any domain; in index modulation, n indices are selected from m indices to activate transmission information, where the total number of indices m and the selected index number n are is the index modulation parameter; according to the index parameters m and n, a total of index combinations, the number of elements in each index combination is n, and the elements are integers between 1 and m;
[0057] figure 2 Shown is a s...
Embodiment 2
[0094] An index modulation mapping method, this embodiment is similar to the first embodiment above, the difference is that in this embodiment, N groups of bit information are matched to the N vertices of the target subgraph, and the N vertices in the target subgraph are Edge weighting, so that the sum of the weights of all edges in the target subgraph is minimum, and its specific method is based on the first embodiment, and also includes:
[0095] (W1) After sequentially matching the initial bit information to N vertices in the target subgraph, execute steps (T3) to (T8) to obtain N matching schemes in total;
[0096] Each time the start bit information is matched to a vertex, all vertices in the target subgraph are initialized to an unmatched state;
[0097] (W2) Select the matching scheme that minimizes the sum of edge weights in the target subgraph from the N matching schemes, as a candidate matching scheme, and initialize the variable n err '=n err ;
[0098] (W3) If t...
Embodiment 3
[0105] A computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, wherein, when the computer program is run by a processor, the device where the computer-readable storage medium is located is controlled to execute the index modulation mapping method provided in any of the above-mentioned embodiments .
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Abstract
The invention discloses an index modulation mapping method, belonging to the field of wireless communication modulation, comprising: acquiring all N under the index modulation parameter all In the graph theory model, if and only if the number of different elements in the two index combinations is n err When , there is an edge between the corresponding two vertices; the subgraph containing N vertices in the graph theory model is obtained as the target subgraph, and the N sets of bit information are matched to the N vertices of the target subgraph, and it is the target subgraph The weights are assigned to the edges in the target subgraph, so that the sum of the weights of all the edges in the target subgraph is the smallest, and the matching relationship between the bit information and the index combination at this time is determined as the final index modulation mapping relationship; the two sets of bits matched by the two vertices are The greater the number of different elements in the information, the greater the weight of the edge between the corresponding two vertices. The invention can minimize the Hamming distance between the original index modulated signals and effectively reduce the bit error rate of the estimated amount of the original signal.
Description
technical field [0001] The invention belongs to the field of wireless communication modulation, and more specifically relates to an index modulation mapping method. Background technique [0002] With people's pursuit of speed and capacity, mobile communication technology has experienced the development from the first generation of mobile communication to the fifth generation of mobile communication. On the one hand, the fifth-generation mobile communication uses massive multi-antenna MIMO (Multiple input multiple output) technology to increase the amount of transmitted information by expanding the spatial dimension; on the other hand, it expands spectrum resources and uses millimeter wave communication to increase communication bandwidth. Now the research on the sixth-generation mobile communication technology has started, and the vision of the next-generation wireless communication is to integrate the sky, the earth, and the sea to realize the interconnection of everything....
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