CN115801055A - Hybrid frequency hopping pattern generation method, medium and device based on RS (Reed-Solomon) codes and m sequences - Google Patents
Hybrid frequency hopping pattern generation method, medium and device based on RS (Reed-Solomon) codes and m sequences Download PDFInfo
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Abstract
The invention provides a hybrid frequency hopping pattern generation method, medium and device based on RS codes and m sequences, wherein the method comprises the following steps: performing RS encoding by using absolute time TOD of a frequency hopping communication system, and extracting a pre-scrambling sequence from code blocks subjected to RS encoding; scrambling each group of m-sequence-based linear feedback shift registers by shifting the pre-scrambling sequence to obtain 1-bit results of each group of m-sequence-based linear feedback shift registers; and recursively calculating all frequency hopping patterns of one frame of the burst signal by carrying out 1-bit result of each group of linear shift feedback registers based on the m sequence. The method for generating the frequency hopping pattern by mixing the RS code and the m sequence solves the problem of poor randomness of the frequency hopping pattern of the burst signal, ensures good randomness, autocorrelation and cross correlation of the frequency hopping pattern of the burst signal, saves a large amount of hardware resources, and simplifies an FPGA (field programmable gate array) realization circuit.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a hybrid frequency hopping pattern generation method, medium and device based on RS codes and m sequences.
Background
At present, the electric wave in the communication field is more and more competitive, and the fixed frequency communication generally adopted in the past is seriously threatened. In order to ensure the reliability of information transmission between two communication parties, an anti-interference communication system such as frequency hopping communication is proposed.
The spread spectrum communication multiplies a signal to be transmitted by a pseudorandom sequence, so that the frequency spectrum of the signal is spread to a very wide frequency band for transmission, and the frequency band is compressed in a related receiving mode at a receiving end to recover an original signal. Spread spectrum communications is based on the well-known shannon theorem in information theory. Shannon's theorem states that under gaussian white noise channel conditions, the channel capacity (the limit rate for error-free transmission) of a system can be expressed by the following equation.
C＝Blog2(1+S/N) (1)
Wherein C represents channel capacity, bit/s; b represents the channel bandwidth, hz; s represents the signal average power, W; n represents the noise power; S/N represents the output signal-to-noise ratio of the channel.
By analyzing, we can find that:
1. there are two ways to increase the channel capacity C, one is to increase the output signal-to-noise ratio and the other is to increase the channel bandwidth. According to equation (1), increasing bandwidth (B) is better than increasing signal-to-noise ratio (S/N) because B is linearly proportional to C and S/N is logarithmic to C.
2. In the case of the channel capacity C, the increase of the signal bandwidth B will reduce the S/N ratio, that is, the requirement of high signal-to-noise ratio of the system can be reduced by increasing the signal bandwidth, and when the frequency bandwidth is large, the communication can be performed in a bad channel environment where the signal power is close to or even submerged in the noise power.
3. Although the channel capacity C increases with the increase of the frequency bandwidth B when the SNR is constantPlus, but the increase in channel capacity is not infinite. Since the noise is white Gaussian noise, the power spectral density is set to be n 0 Then the noise power can be expressed as N = N 0 B, therefore, when B increases, N also increases, resulting in a decrease in the signal-to-noise ratio, so C cannot increase indefinitely. By derivation, when the frequency bandwidth tends to infinity, the limit value of the channel capacity can be expressed as:
the spread spectrum communication utilizes the method for widening the bandwidth to make up for the reduction of the signal-to-noise ratio and realize the anti-interference communication under the severe channel environment. In military communication, signal power is often submerged in noise due to the existence of man-made strong interference, and therefore, spread spectrum communication is widely used in the military field.
Frequency hopping communication is a spread spectrum communication method, in which carrier frequencies hop according to a pattern (sequence) in a very wide frequency band. The basic principle of a frequency hopping communication system is shown in fig. 1, and the generated frequency hopping pattern is shown in fig. 2.
At a transmitting end, a signal to be transmitted is modulated to form a baseband signal with a bandwidth of W1. And obtaining a frequency hopping sequence through a pseudo-random code generator, and selecting a corresponding frequency control word in a frequency hopping frequency lookup table by using the sequence to control the frequency synthesizer of the sending end to generate a carrier wave which continuously hops. The carrier wave and the previous baseband signal are mixed to obtain a radio frequency signal with continuously hopping frequency, namely a frequency hopping signal. The frequency hopping signal randomly hops in a frequency band with the bandwidth of W2 (W2 > W1), and the system realizes the spectrum spreading from the narrow-band bandwidth W1 to the frequency hopping signal using bandwidth W2. At the receiving end, the local carrier generated by the receiving end frequency synthesizer is changed according to the jump rule of the transmitting end carrier signal through the synchronization module, and the local carrier and the transmitting end carrier have a difference of an intermediate frequency f IF . And demodulating the intermediate frequency signal obtained after the hopping to obtain the required original signal. The signals being frequency hopped throughout the frequency hopping communicationsThe method avoids certain frequency points subjected to natural interference or artificial interference, and achieves the purpose of anti-interference communication.
The traditional frequency hopping sequences comprise M sequences, M sequences, gold sequences, RS sequences, chaotic sequences and the like. The m sequence has the advantages of good pseudo-randomness, good balance performance, simple circuit implementation mode and poor Hamming correlation performance. The RS code sequence has the advantages of stronger pseudo-randomness, strong networking capability and good Hamming correlation performance, and has the defect that the circuit realization mode is more complex.
The Reed-Solomon code (RS code for short) is an error correcting code and is a special q-system BCH cyclic code on a finite field. It can correct random errors and burst errors, and is also a typical algebraic geometry code. The RS code is one of the most effective and widely used error correction codes at present, and is also one of the most commonly used error correction codes in block codes. Number of elements q = p contained in field of RS code r P is a prime number and r is any integer. The most important parameters characterizing RS codes are the code length n, the number of information bits k and the code distance d, which are defined in terms of error correction codes. Code sequence length n = q-1=2 r -1, the number of information bits k = n-d +1, the code distance d = n-k +1.
Most of the conventional frequency hopping sequences are application scenes with continuous communication signals or application scenes with continuous communication signals for carrying out equipment absolute time transmission to support the synchronization of the whole frequency hopping system, so that under the condition of continuously correcting system time in the initial clock alignment communication process, continuous frequency hopping pattern generation can be carried out by m sequences and constructing a linear feedback shift register. For burst signal communication systems, however, it is difficult to keep the states of the linear feedback shift registers of different devices consistent, and the randomness of the hopping pattern is poor. Continuous frequency hopping pattern generation by m-sequence and construction of linear feedback shift registers is not simple. If the frequency hopping pattern of the burst signal can be generated by using the RS codes, the RS codes are required to be carried out for 1 time when each frequency hopping frequency point is generated, and then the frequency hopping frequency points are taken out from a frequency mapping table planned in advance. Due to the characteristics of the RS code sequence, the FPGA has complex circuit and consumes more resources.
Disclosure of Invention
The invention aims to provide a hybrid frequency hopping pattern generation method, medium and device based on RS (Reed-Solomon) coding and m sequences, so as to solve the problems that the states of linear feedback shift registers are difficult to keep consistent in the frequency hopping pattern generation of a communication system of burst signals, so that an FPGA (field programmable gate array) implementation circuit is complex and consumes a lot of resources.
The invention provides a hybrid frequency hopping pattern generation method based on RS codes and m sequences, which comprises the following steps:
performing RS encoding by using absolute time TOD of a frequency hopping communication system, and extracting a pre-scrambling sequence from code blocks subjected to RS encoding;
scrambling each group of m-sequence-based linear feedback shift registers by shifting the pre-scrambling sequence to obtain 1-bit results of each group of m-sequence-based linear feedback shift registers;
and recursively calculating all frequency hopping patterns of one frame of the burst signal by carrying out 1-bit result of each group of linear shift feedback registers based on the m sequences.
In a preferred embodiment, step S100 includes:
s101, acquiring a 16-bit low TODL in absolute time TOD;
s102, carrying out RS coding on the obtained 16-bit low-order TODL to obtain a 60-bit code block;
s103, extracting 1 bit from 1 to 60 bits in a 60-bit code block every 3 bits to obtain a 20-bit sequence;
s104, taking the lower 16 bits from the 20 bit sequence as a pre-scrambling sequence.
In a preferred embodiment, step S200 includes:
s201, shifting the pre-scrambling sequence from low bit to high bit by 1, 3, 5, 7, 9, 11 and 13 bits respectively to obtain 7 groups of different 16-bit pre-scrambling sequences, and performing XOR operation on the 7 groups of pre-scrambling sequences to initial sequences of 7 groups of different linear feedback shift registers respectively to obtain register values of 7 groups of linear feedback shift registers, thereby completing scrambling of 7 groups of initial states of the linear feedback shift registers based on m sequences;
s202, according to the number of frequency hopping points required to be calculated at one time, XOR operation is carried out on register values of 7 groups of linear feedback shift registers according to tap coefficients, 1 bit is obtained by each group of linear feedback shift registers, after the XOR operation is completed, the linear feedback shift registers sequentially carry out shift operation to high bits, the 1 bit result obtained by each group of linear feedback shift registers is assigned to the lowest bit of the linear feedback shift registers, the 1 bit result obtained by the calculation is output, and 7bits are calculated in total.
In a preferred embodiment, the linear feedback shift register based on m sequences means that the linear feedback shift register selects a register with a length of 16 to construct the m sequences.
In a preferred embodiment, the tap coefficient is [ 01 100 101 00 1000 01 ].
In a preferred embodiment, the initial sequences of the m-sequence based linear feedback shift registers of groups 1 to 7 are [ 01 01 01 01 000 0], [ 01 000 000 01 ], [ 1000 000 000 000 00 ], [ 000 000 000 000 000 000 ], [ 000 000 00 1000 000 000 ], [ 000 01 000 01 000 000 ] and [ 1000 000 000 00 100 100 1, respectively.
In a preferred embodiment, step S300 includes:
s301, arranging 7-bit results output by 7 groups of linear feedback shift registers from low order to high order in sequence to obtain a 7-bit binary frequency hopping frequency lookup table sequence;
s302, converting the 7-bit binary frequency hopping frequency lookup table sequence into a decimal system, and then performing modulo division on 107 to obtain the sequence number of the frequency hopping frequency lookup table;
s303, finding out the corresponding frequency hopping frequency from the frequency hopping frequency lookup table according to the sequence number of the frequency hopping frequency lookup table;
and S304, outputting a frequency hopping frequency control word.
The present invention also provides a computer terminal storage medium storing computer terminal executable instructions for performing the above-described hybrid frequency hopping pattern generation method based on RS codes and m-sequences.
The present invention also provides a computing device comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the hybrid frequency hopping pattern generation method based on RS encoding and m-sequences described above.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
compared with the traditional frequency hopping pattern generation method, the method for generating the frequency hopping pattern by mixing the RS code and the m sequence solves the problem of poor randomness of the frequency hopping pattern of the burst signal, ensures good randomness, autocorrelation and cross correlation of the frequency hopping pattern of the burst signal, saves a large amount of hardware resources, and simplifies an FPGA (field programmable gate array) realization circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and it is obvious for those skilled in the art that other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a schematic diagram of a frequency hopping communication system.
Fig. 2 is a schematic diagram of a frequency hopping pattern of a frequency hopping communication system.
Fig. 3 is a flowchart of a hybrid frequency hopping pattern generation method based on RS coding and m sequence in the embodiment of the present invention.
Fig. 4 is a flowchart of calculating frequency hopping points using TODL according to an embodiment of the present invention.
FIG. 5 is a diagram of an m-sequence based linear feedback shift register according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Examples
As shown in fig. 3 and fig. 4, the present embodiment proposes a hybrid frequency hopping pattern generation method based on RS coding and m sequence, which includes:
s100, carrying out RS coding by using absolute time TOD of a frequency hopping communication system, and extracting a pre-scrambling sequence from a code block subjected to RS coding;
in the frequency hopping communication system, the equipment in the frequency hopping network needs to be used as the input for calculating the frequency hopping point based on the same parameter, and the reference parameter selected by the invention is the absolute time TOD of the frequency hopping communication system. The frequency hopping synchronization mode based on the absolute time TOD comprehensively utilizes the advantages of a self-synchronization method, a synchronous word head method and a reference clock method, and has good synchronous capture performance. The method is characterized in that an absolute time TOD variable with synchronization information is placed in a synchronization head, the synchronization head is sent through a specific synchronization frequency, a receiving end extracts the synchronization information from the synchronization head by using a scanning dwell mode (a self-synchronization mode) to adjust a local frequency hopping sequence generator, so that a frequency synthesizer is controlled to generate corresponding debounce carriers, and finally, receiving and sending synchronization is realized. The absolute time TOD is divided into a high-order TODH and a low-order TODL, the absolute time TOD of the frequency hopping communication system is represented by 1ms, the low-order TODL is represented by a 16-bit binary, the timing length of the low-order TODL is 65536, and about 65536/1000/60 ≈ 1.09 minutes, namely the low-order TODL carries to the high-order TODH every 1.09 minutes. The high-order TODH is expressed by 24-bit binary, and the total timing length is 16777216, which is about 16777216/1.09/60/24/365 ≈ 29.28 years. Can meet the requirements of a general tactical frequency hopping communication system. Thus, step S100 in this embodiment includes the following sub-steps:
s101, acquiring a 16-bit low TODL in absolute time TOD; taking 16-bit low TODL as a frequency hopping and frequency selecting reference sequence to carry out the following operations;
s102, carrying out RS (15, 4) coding on the obtained 16-bit low-bit TODL to obtain a 60-bit code block;
s103, extracting 1 bit from 1 to 60 bits in a 60-bit code block every 3 bits to obtain a 20-bit sequence;
s104, taking the lower 16 bits from the 20 bit sequence as a pre-scrambling sequence.
S200, scrambling each group of linear feedback shift registers based on m sequences by shifting the pre-scrambling sequences to obtain 1-bit results of each group of linear feedback shift registers based on m sequences;
the frequency hopping linear feedback shift register selects a register with the length of 16 to construct an m sequence, and the cycle period is 2 16 -1=65535. Tap coefficient is [ 01 00 101 000 01]According to the planning number of 107 frequency points of the frequency hopping frequency lookup table, at least 7bits are required to be used for representing, namely 7 groups of linear feedback shift registers based on m sequences are required to be used, and 1 bit is output by each group through 1-time recursive operation. The initial sequences of the 1 st to 7 th groups of linear feedback shift registers based on the m-sequence are [ 01 01 01 000 000 000]、[0 1 0 1 0 0 0 0 1 0 0 0 0 0 1 1]、[1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0]、[0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0]、[0 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0]、[0 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0]And [ 1000 01 000 000 000 1]. . The operation process of each group of linear feedback shift registers based on m-sequences is shown in fig. 5. Thus, step S200 comprises the following sub-steps:
s201, shifting the pre-scrambling sequence from low bit to high bit by 1, 3, 5, 7, 9, 11 and 13 bits respectively to obtain 7 groups of different 16-bit pre-scrambling sequences, and performing XOR operation on the 7 groups of pre-scrambling sequences to initial sequences of 7 groups of different linear feedback shift registers respectively to obtain register values of 7 groups of linear feedback shift registers, thereby completing scrambling of 7 groups of initial states of the linear feedback shift registers based on m sequences;
s202, according to the number of frequency hopping points required to be calculated at one time, XOR operation is carried out on register values of 7 groups of linear feedback shift registers according to tap coefficients, 1 bit is obtained by each group of linear feedback shift registers, after the XOR operation is completed, the linear feedback shift registers sequentially carry out shift operation to the high order, the 1 bit result obtained by each group of linear feedback shift registers is assigned to the lowest order D1 of the linear feedback shift registers, and the 1 bit result obtained by calculation is output to total 7 bits.
S300, recursively calculating all frequency hopping patterns of a frame of the burst signal according to the 1-bit result of each group of linear shift feedback registers based on the m sequence; step S300 includes the following substeps:
s301, arranging 7-bit results output by 7 groups of linear feedback shift registers from low order to high order in sequence to obtain a 7-bit binary frequency hopping frequency lookup table sequence;
s302, converting the 7-bit binary frequency hopping frequency lookup table sequence into a decimal system, and then performing modulo division on 107 to obtain the serial number of the frequency hopping frequency lookup table;
s303, finding out the corresponding frequency hopping frequency from the frequency hopping frequency lookup table according to the sequence number of the frequency hopping frequency lookup table; the frequency hopping frequency lookup table is shown in table 1.
Table 1, frequency hopping frequency lookup table:
| serial number | Frequency point Mhz | Serial number | Frequency point Mhz | Serial number | Frequency point Mhz | Serial number | Frequency point Mhz |
| 0 | 502 | 28 | 648 | 56 | 1503 | 84 | 1732 |
| 1 | 505 | 29 | 651 | 57 | 1506 | 85 | 1735 |
| 2 | 508 | 30 | 654 | 58 | 1509 | 86 | 1738 |
| 3 | 511 | 31 | 657 | 59 | 1512 | 87 | 1741 |
| 4 | 514 | 32 | 1431 | 60 | 1515 | 88 | 1744 |
| 5 | 517 | 33 | 1434 | 61 | 1518 | 89 | 1747 |
| 6 | 520 | 34 | 1437 | 62 | 1521 | 90 | 1750 |
| 7 | 523 | 35 | 1440 | 63 | 1524 | 91 | 1753 |
| 8 | 526 | 36 | 1443 | 64 | 1672 | 92 | 1756 |
| 9 | 529 | 37 | 1446 | 65 | 1675 | 93 | 1759 |
| 10 | 532 | 38 | 1449 | 66 | 1678 | 94 | 1762 |
| 11 | 535 | 39 | 1452 | 67 | 1681 | 95 | 1765 |
| 12 | 538 | 40 | 1455 | 68 | 1684 | 96 | 1768 |
| 13 | 541 | 41 | 1458 | 69 | 1687 | 97 | 1771 |
| 14 | 544 | 42 | 1461 | 70 | 1690 | 98 | 1774 |
| 15 | 547 | 43 | 1464 | 71 | 1693 | 99 | 1777 |
| 16 | 612 | 44 | 1467 | 72 | 1696 | 100 | 1780 |
| 17 | 615 | 45 | 1470 | 73 | 1699 | 101 | 1783 |
| 18 | 618 | 46 | 1473 | 74 | 1702 | 102 | 1786 |
| 19 | 621 | 47 | 1476 | 75 | 1705 | 103 | 1789 |
| 20 | 624 | 48 | 1479 | 76 | 1708 | 104 | 1792 |
| 21 | 627 | 49 | 1482 | 77 | 1711 | 105 | 1795 |
| 22 | 630 | 50 | 1485 | 78 | 1714 | 106 | 1798 |
| 23 | 633 | 51 | 1488 | 79 | 1717 | ||
| 24 | 636 | 52 | 1491 | 80 | 1720 | ||
| 25 | 639 | 53 | 1494 | 81 | 1723 | ||
| 26 | 642 | 54 | 1497 | 82 | 1726 | ||
| 27 | 645 | 55 | 1500 | 83 | 1729 |
And S304, outputting a frequency hopping frequency control word.
In the above solution, in the frequency hopping communication system of burst signals, the initial state of the linear feedback shift register is scrambled by using the pre-scrambling sequence after RS encoding processing is performed on the low-order TODL of the absolute time TOD, and the number of recursion calculations of the linear feedback shift register is determined according to the number of pulses in a frame of signal, thereby calculating the frequency hopping pattern of all pulses in a frame of signal. Compared with the traditional frequency hopping pattern generation method, the method for generating the frequency hopping pattern by mixing the RS code and the m sequence solves the problem of poor randomness of the frequency hopping pattern of the burst signal, ensures good randomness, autocorrelation and cross correlation of the frequency hopping pattern of the burst signal, saves a large amount of hardware resources, and simplifies an FPGA (field programmable gate array) realization circuit.
Furthermore, in some embodiments, a computer terminal storage medium is provided that stores computer terminal executable instructions for performing the hybrid frequency hopping pattern generation method based on RS codes and m-sequences as described in the previous embodiments. Examples of the computer storage medium include a magnetic storage medium (e.g., a floppy disk, a hard disk, etc.), an optical recording medium (e.g., a CD-ROM, a DVD, etc.), or a memory such as a memory card, a ROM, a RAM, or the like. The computer storage media may also be distributed over network-connected computer systems, such as an application store.
Furthermore, in some embodiments, a computing device is presented, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method for generating a hybrid frequency hopping pattern based on RS encoding and m-sequence as described in the previous embodiments. Examples of computing devices include PCs, tablets, smart phones or PDAs, and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A hybrid frequency hopping pattern generation method based on RS codes and m sequences is characterized by comprising the following steps:
RS encoding is carried out by using absolute time TOD of a frequency hopping communication system, and a pre-scrambling sequence is extracted from a code block after RS encoding;
scrambling each group of m-sequence-based linear feedback shift registers by shifting the pre-scrambling sequence to obtain 1-bit results of each group of m-sequence-based linear feedback shift registers;
and recursively calculating all frequency hopping patterns of one frame of the burst signal by carrying out 1-bit result of each group of linear shift feedback registers based on the m sequence.
2. The RS-code and m-sequence based hybrid frequency hopping pattern generating method according to claim 1, wherein the step S100 comprises:
s101, acquiring a 16-bit low TODL in the absolute time TOD;
s102, carrying out RS coding on the obtained 16-bit low-bit TODL to obtain a 60-bit code block;
s103, extracting 1 bit from 1 to 60 bits in a 60-bit code block every 3 bits to obtain a 20-bit sequence;
s104, taking the lower 16 bits from the 20 bit sequence as a pre-scrambling sequence.
3. The RS-code and m-sequence based hybrid frequency hopping pattern generating method according to claim 2, wherein the step S200 comprises:
s201, shifting the pre-scrambling sequence from low bit to high bit by 1, 3, 5, 7, 9, 11 and 13 bits respectively to obtain 7 different groups of 16-bit pre-scrambling sequences, and performing XOR operation on the 7 different groups of initial sequences of the linear feedback shift register respectively to obtain 7 groups of register values of the linear feedback shift register, thereby completing scrambling of the 7 groups of initial states of the linear feedback shift register based on m sequences;
s202, according to the number of frequency hopping points required to be calculated at one time, XOR operation is carried out on the register values of 7 groups of linear feedback shift registers according to tap coefficients, 1 bit is obtained by each group of linear feedback shift registers, the linear feedback shift registers carry out shift operation to high bits in sequence after the XOR operation is completed, the 1 bit result obtained by each group of linear feedback shift registers is assigned to the lowest bit of the linear feedback shift registers, and the 1 bit result obtained by operation is output to total 7 bits.
4. The RS-coding and m-sequence-based hybrid frequency hopping pattern generation method of claim 3, wherein the m-sequence-based linear feedback shift register is characterized in that a register with a length of 16 is selected as the linear feedback shift register to construct the m-sequence.
5. The RS-coding-and-m-sequence-based hybrid frequency hopping pattern generation method of claim 3, wherein the tap coefficient is [ 01 00 1000 01 ].
6. The RS-coding and m-sequence based hybrid frequency hopping pattern generation method of claim 5, wherein the initial sequences of the 1 st to 7 th groups of m-sequence based linear feedback shift registers are [ 00 101 00 1000 00 ], [ 01 01 000 000 000 000 01 ], [ 1000 00 11 000 000 00 ], [ 000 00 1000 000 0], [ 01 000 01 01 000 000 000 ] and [ 1000 000 00 100 101 01, respectively.
7. The RS-coding and m-sequence-based hybrid frequency-hopping pattern generating method according to any one of claims 3 to 6, wherein the step S300 comprises:
s301, arranging 7-bit results output by 7 groups of linear feedback shift registers from low order to high order in sequence to obtain a 7-bit binary frequency hopping frequency lookup table sequence;
s302, converting the 7-bit binary frequency hopping frequency lookup table sequence into a decimal system, and then performing modulo division on 107 to obtain the serial number of the frequency hopping frequency lookup table;
s303, finding out the corresponding frequency hopping frequency from the frequency hopping frequency lookup table according to the sequence number of the frequency hopping frequency lookup table;
and S304, outputting a frequency hopping frequency control word.
8. A computer terminal storage medium storing computer terminal executable instructions for performing the RS coding and m-sequence based hybrid frequency hopping pattern generation method of any one of claims 1 to 7.
9. A computing device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the RS-coding and m-sequence based hybrid frequency hopping pattern generating method of any one of claims 1 to 7.
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