Method and structure for generating frequency hopping sequence based on discontinuous frequency bands
A technology of frequency hopping sequence and generation method, applied in electrical components, transmission systems, etc., can solve the problems of dynamic flexibility, uniform performance of random performance, and poor Hamming correlation
Inactive Publication Date: 2014-09-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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However, there are few existing research methods on constructing cognitive frequency hopping sequences, such as figure 1 As shown, this method (the subsequent description is called the original cognitive frequency hopping sequence construction method) is based on the pseudo-random sequence construction method, and its dynamic flexibility, random performance, uniform performance, and Hamming correlation are not very good
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[0045] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but the content protected by the present invention is not limited to the following description.
[0046] like figure 2 Shown, a kind of frequency hopping sequence generation method based on discontinuous frequency band, it comprises the following steps:
[0047] S1: Divide the spectrum to be detected into N small frequency bands on average, and number each frequency band, recorded as W={W 1 ,W 2 ,W 3 ,...,W N};
[0048] S2: Detect the free frequency band in the frequency band, and combine the number of the free frequency band into an available spectrum number pool H, indicating the frequency number that can be used for frequency hopping, denoted as H∈{1,2,3,…,N}, where N 1 is the number of free frequency bands;
[0049] S3: Construct a length of L, the sequence value is 0~(N 1 -1) Transition jump sequence S={S in the range 1 ,S 2 ,S ...
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The invention discloses a method and structure for generating a frequency hopping sequence based on discontinuous frequency bands. The method includes the following steps that 1, a frequency spectrum to be detected is divided into N frequency bands, and each frequency band is numbered; 2, spare frequency bands in the frequency bands are detected through the frequency spectrum sensing technology, and the N1 serial numbers of the spare frequency bands are combined to be an available frequency spectrum serial number pool; 3, a transition hopping sequence of which the length is L and the sequence value ranges from zero to N1-1 is established; 4, the transition hopping sequence and the available frequency spectrum serial number pool are mapped, and a frequency hopping sequence based on the discontinuous frequency bands is generated finally. By means of the method and structure, the cognitive radio technology and the frequency hopping technology can be well fused, the generated frequency hopping sequence has the good Hamming correlation, randomness, one-dimensional uniformity and two-dimensional continuity, and the quality of frequency hopping communication is remarkably improved.
Description
technical field [0001] The invention relates to a frequency hopping sequence design in frequency hopping communication, belongs to the field of frequency hopping communication, and particularly relates to a method and structure for generating a frequency hopping sequence based on discontinuous frequency bands. Background technique [0002] Frequency hopping communication refers to the continuous random hopping of the carrier under the control of pseudocode. It has the advantages of anti-interference, low interception, multiple access networking, anti-fading, and easy compatibility with narrowband communication systems, so it is widely used in military environments. [0003] The frequency hopping sequence should have good Hamming correlation, randomness, one-dimensional uniformity and two-dimensional continuity. The construction algorithm of frequency hopping sequence is the core of frequency hopping communication design. In recent years, there have been many researches on t...
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IPC IPC(8): H04B1/7136
Inventor 吕明刘馨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA