CN112751628B - Method for determining comb spectrum interference signal frequency points in multiple limited bandwidth ranges - Google Patents
Method for determining comb spectrum interference signal frequency points in multiple limited bandwidth ranges Download PDFInfo
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- CN112751628B CN112751628B CN202011508205.2A CN202011508205A CN112751628B CN 112751628 B CN112751628 B CN 112751628B CN 202011508205 A CN202011508205 A CN 202011508205A CN 112751628 B CN112751628 B CN 112751628B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention provides a method for determining comb spectrum interference signal frequency points in a plurality of limited bandwidth ranges, which is characterized in that comb spectrums with different frequency intervals are generated based on different limited bands in a targeted manner, the maximum number of comb spectrums which can be inserted into a certain limited bandwidth is calculated, and the insertion frequency point of each comb spectrum is obtained based on the ratio of the maximum number of comb spectrums which can be inserted into the certain limited bandwidth to the actual number of comb spectrums which need to be inserted into the certain limited bandwidth, so that accurate interference is generated on different working frequency points of different frequency bands. The invention obtains the insertion frequency point of each comb spectrum by calculating the maximum number of the comb spectrums which can be inserted in a certain limited bandwidth and based on the ratio of the maximum number of the comb spectrums which can be inserted to the actual number of the comb spectrums which need to be inserted, thereby generating accurate interference on different working frequency points of different frequency bands and avoiding the conflict between a plurality of limited bandwidth ranges and the total comb spectrum bandwidth.
Description
Technical Field
The invention relates to the technical field related to mobile communication, digital signal processing and the like, in particular to an interference frequency point estimation method.
Background
In order to generate comb spectrum interference signals for digital receivers working in a plurality of limited bandwidth ranges so as to realize targeted interference on one or more frequency points in signals of different working bandwidth frequency bands, a method for determining the frequency points of the comb spectrum interference signals in the plurality of limited bandwidth ranges is provided. The technology is based on different finite bands to generate comb spectrums with different frequency intervals in a targeted manner, the maximum number of comb spectrums which can be inserted in a certain finite bandwidth is calculated, and the insertion frequency point of each comb spectrum is obtained based on the ratio of the maximum number of comb spectrums which can be inserted to the actual number of comb spectrums which need to be inserted, so that accurate interference is generated on different working frequency points of different frequency bands.
The existing method for determining comb spectrum interference signal frequency points in multiple limited bandwidth ranges is mainly based on average segmentation of a working frequency band directly, and comb spectrum interference signals are inserted into segmentation points.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for determining comb spectrum interference signal frequency points in a plurality of limited bandwidth ranges. The invention provides a method for determining comb spectrum interference signal frequency points in a plurality of limited bandwidth ranges. Specifically, comb spectrums with different frequency intervals are generated based on different finite bands, the maximum number of comb spectrums which can be inserted in a certain finite bandwidth is calculated, and the insertion frequency point of each comb spectrum is obtained based on the ratio of the maximum number of comb spectrums which can be inserted to the actual number of comb spectrums which need to be inserted, so that accurate interference is generated on different working frequency points of different frequency bands.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
step 1: initializing, setting the range of each sub-bandwidth of the interference signal: [ f _ o _ I, f _ s _ I ], I is 1, 2 … I, and f _ o _ I and f _ s _ I are respectively the start frequency point and the cut frequency point of the ith sub-bandwidth;
step 2: the bandwidth of one comb spectrum is WHz, floor ((f _ s _ i-f _ o _ i)/W) ═ N _ i, N _ i is the number capable of accommodating the comb spectrum at most in the ith sub-bandwidth frequency band, wherein floor is a taken-down integer;
and step 3: let W _ e be W/2, if the insertion of M comb spectrums is implemented in the ith sub-bandwidth frequency band, and M is not greater than N _ i, then M frequency point values are:
F_i_m＝f_s_i+W_e*x+W_e*x*2*(m-1)，m＝1…M (1)
and the comb spectrum performs frequency domain interference on the useful signal according to the corresponding frequency point.
The method has the advantages that the comb spectrums with different frequency intervals are generated based on different finite bands in a targeted mode, the maximum number of the comb spectrums which can be inserted in a certain finite bandwidth is calculated, and the insertion frequency point of each comb spectrum is obtained based on the ratio of the maximum number of the comb spectrums which can be inserted to the number of the comb spectrums which are actually required to be inserted, so that accurate interference is generated on different working frequency points of different frequency bands, and the conflict between a plurality of finite bandwidth ranges and the total comb spectrum bandwidth is avoided.
Drawings
Fig. 1 is a schematic process diagram of a method for determining comb spectrum interference signal frequency points in a plurality of limited bandwidth ranges according to the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The invention provides a method for determining comb spectrum interference signal frequency points in a plurality of limited bandwidth ranges. The core idea is that the insertion frequency point of each comb spectrum is obtained based on the ratio of the maximum number of comb spectrums which can be inserted to the actual number of comb spectrums which need to be inserted, the comb spectrums with different frequency intervals are generated based on different finite bands in a targeted manner, the maximum number of comb spectrums which can be inserted by calculating a certain finite bandwidth is obtained, the insertion frequency point of each comb spectrum is obtained based on the ratio of the maximum number of comb spectrums which can be inserted to the actual number of comb spectrums which need to be inserted, and therefore accurate interference is generated on different working frequency points of different frequency bands.
The following describes in detail a method for determining frequency points of a comb spectrum interference signal in a plurality of limited bandwidth ranges according to the present invention with reference to the accompanying drawings and examples.
In the system of this example, the digital receiver has 2 limited working bandwidths, which are respectively the 1 st sub-bandwidth [50MHz, 100MHz ] and the 2 nd sub-bandwidth [150MHz, 180MHz ], and in specific operation:
step 1: initializing, setting the range of each sub-bandwidth of the interference signal: [50MHz, 100MHz ] and [150MHz, 180MHz ], i ═ 1, 2;
step 2: the bandwidth of one comb spectrum is 5MHz, for sub-bandwidths [50MHz, 100MHz ],
floor((f_s_i-f_o_i)/W)＝floor((100MHz-50MHz)/5MHz)＝10；
for sub-bandwidths [150MHz, 180MHz ],
floor((f_s_i-f_o_i)/W)＝floor((180MHz-150MHz)/5MHz)＝6；
and step 3: let W _ e be 5MHz/2 be 2.5MHz, and if 2 comb spectrum insertions are implemented in the 1 st sub-bandwidth [50MHz, 100MHz ], then the 2 frequency point values are:
F_1_1＝50MHz+2.5MHz*5+2.5MHz*5*2* (1-1)
＝62.5MHz
F_1_2＝50MHz+2.5MHz*5+2.5MHz*5*2* (2-1)
＝87.5MHz
and obtaining frequency points of 2 comb spectrums, and carrying out frequency domain interference on the useful signals by the comb spectrums according to the corresponding frequency points.
The foregoing is merely exemplary of the present invention and those skilled in the art may make various changes and modifications without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the technical solutions and equivalents thereof recited in the claims of the present invention, it is intended that the present invention also include such modifications and variations, and such modifications and variations based on the idea of the present invention still fall within the scope of the claims of the present invention.
Claims (1)
1. A method for determining comb spectrum interference signal frequency points in a plurality of limited bandwidth ranges is characterized by comprising the following steps:
step 1: initializing, setting the range of each sub-bandwidth of the interference signal: [ f _ o _ I, f _ s _ I ], I is 1, 2 … I, and f _ o _ I and f _ s _ I are respectively the start frequency point and the cut frequency point of the ith sub-bandwidth;
step 2: the bandwidth of one comb spectrum is WHz, floor ((f _ s _ i-f _ o _ i)/W) ═ N _ i, N _ i is the number capable of accommodating the comb spectrum at most in the ith sub-bandwidth frequency band, wherein floor is a taken-down integer;
and step 3: let W _ e be W/2, if the insertion of M comb spectrums is implemented in the ith sub-bandwidth frequency band, and M is not greater than N _ i, the frequency point values corresponding to the M comb spectrums are:
F_i_m＝f_s_i+W_e*x+W_e*x*2*(m-1)，m＝1…M (1)
and obtaining frequency points of the M comb spectrums, wherein x is N _ i/M, F _ i _ M is a frequency point value of the mth comb spectrum, and the comb spectrums perform frequency domain interference on the useful signals according to the corresponding frequency points.
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| WO2007022715A1 (en) * | 2005-08-23 | 2007-03-01 | Huawei Technologies Co., Ltd. | A method, system and terminal for multiplexing uplink pilot based on single carrier frequency division multiple access |
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| WO2007022715A1 (en) * | 2005-08-23 | 2007-03-01 | Huawei Technologies Co., Ltd. | A method, system and terminal for multiplexing uplink pilot based on single carrier frequency division multiple access |
| CN107294640A (en) * | 2017-05-11 | 2017-10-24 | 中国电子科技集团公司第二十研究所 | Based on it is cognitive lead to, disturb, anti-integrated control method |
| CN109039309A (en) * | 2018-08-06 | 2018-12-18 | 电子科技大学 | High flat degree broadband comb spectrum generator and method for generation based on phaselocked loop mechanism |
| CN110426680A (en) * | 2019-07-20 | 2019-11-08 | 中国船舶重工集团公司第七二四研究所 | One kind being based on interference signal time-frequency and related coefficient multidimensional characteristic joint classification method |
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