CN117728861A - Anti-interference signal receiving method, device and equipment - Google Patents
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Abstract
The invention relates to the technical field of communication, and particularly discloses an anti-interference signal receiving method, device and equipment, wherein the method comprises the following steps: generating a noise power sequence based on preset information and a signal received through a target channel; determining a first threshold based on a minimum value in the noise power sequence and a preset noise power threshold value; generating a target sequence based on the noise power sequence and the first threshold; weighting soft information based on the target sequence, the soft information being used to demodulate a signal received over a target channel; the signal received through the target channel is demodulated based on the weighted soft information. Thus, the soft information during demodulation is weighted based on the noise power sequence, so that the influence of interference on demodulation performance is reduced, and the anti-interference capability of data processing is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for receiving an anti-interference signal.
Background
Currently, in a 5G NR base station implementation, an eNB (base station) generally receives uplink traffic data sent by a UE (user terminal) through an uplink PUSCH channel. The uplink PUSCH channel receiving process generally obtains a final uplink crc result and a TB stream after a series of processes including time domain decp, FFT, channel estimation and measurement, equalization, de-layer mapping, demodulation, descrambling, bit-level decoding and decrc.
In practical application, uplink PUSCH channel reception is easily interfered by other co-frequency neighboring cells, especially some strong narrowband interference, thereby affecting reception performance and severely affecting uplink rate. In actual detection, according to the detection result, when narrowband interference exists, the uplink rate can be greatly fluctuated, and compared with a test scene without interference, the uplink average rate is obviously reduced.
Therefore, a method is needed to improve the anti-interference capability of uplink PUSCH channel data processing at the 5G NR base station side.
Disclosure of Invention
In view of the above, the present invention aims to provide an anti-interference signal receiving method, device and equipment, so as to overcome the problem of poor anti-interference capability of uplink PUSCH channel data processing at the current 5G NR base station side.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides an anti-interference signal receiving method, including:
generating a noise power sequence based on preset information and a signal received through a target channel;
determining a first threshold based on a minimum value in the noise power sequence and a preset noise power threshold value;
generating a target sequence based on the noise power sequence and the first threshold;
weighting soft information based on the target sequence, the soft information being used to demodulate a signal received over a target channel;
the signal received through the target channel is demodulated based on the weighted soft information.
Further, the generating a noise power sequence based on the preset information and the signal received through the target channel includes:
and calculating and generating the noise power sequence based on the preset information and idle reference information of the target user scheduling resource block in the signal received through the target channel.
Further, the determining the first threshold based on the minimum value in the noise power sequence and a preset noise power threshold value includes:
determining a minimum threshold based on a minimum value in the noise power sequence;
if the minimum threshold is smaller than the preset noise power threshold, taking the preset noise power threshold as the first threshold;
and if the minimum threshold is greater than or equal to the preset noise power threshold, taking the minimum threshold as the first threshold.
Further, the generating a target sequence based on the noise power sequence and the first threshold value includes:
multiplying the result of the inverse of the noise power sequence by the first threshold value to obtain a basic sequence;
and modifying a value larger than a second threshold value in the basic sequence to the second threshold value to obtain the target sequence.
Further, the weighting soft information based on the target sequence includes:
and multiplying the target sequence serving as a weight value with the soft information to obtain weighted soft information.
Further, the target channel includes a PUSCH channel.
In a second aspect, embodiments of the present application further provide an anti-interference signal receiving apparatus, including:
the first calculation module is used for generating a noise power sequence based on preset information and a signal received through a target channel;
the second calculation module is used for determining a first threshold value based on the minimum value in the noise power sequence and a preset noise power threshold value;
a third calculation module for generating a target sequence based on the noise power sequence and the first threshold;
a weighting module for weighting soft information based on the target sequence, the soft information being used for demodulating a signal received over a target channel;
and the demodulation module is used for demodulating the signals received through the target channel based on the weighted soft information.
In a third aspect, an embodiment of the present application further provides an anti-interference signal receiving apparatus, including a processor and a memory, where the processor is connected to the memory:
the processor is used for calling and executing the program stored in the memory;
the memory is configured to store the program, where the program is at least configured to execute the above-mentioned anti-interference signal receiving method.
The invention relates to the technical field of communication, and particularly discloses an anti-interference signal receiving method, device and equipment, wherein the method comprises the following steps: generating a noise power sequence based on preset information and a signal received through a target channel; determining a first threshold based on a minimum value in the noise power sequence and a preset noise power threshold value; generating a target sequence based on the noise power sequence and the first threshold; weighting soft information based on the target sequence, the soft information being used to demodulate a signal received over a target channel; the signal received through the target channel is demodulated based on the weighted soft information. Thus, the soft information during demodulation is weighted based on the noise power sequence, so that the influence of interference on demodulation performance is reduced, and the anti-interference capability of data processing is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a signal receiving process in the prior art;
fig. 2 is a flow chart of an anti-interference signal receiving method according to an embodiment of the present invention;
fig. 3 is a complete flowchart of an anti-interference signal receiving method according to an embodiment of the present invention;
FIG. 4 is an upstream traffic monitoring graph of prior art communications;
fig. 5 is an uplink flow monitoring diagram of an anti-interference signal receiving method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an anti-interference signal receiving device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an anti-interference signal receiving device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
Summary of the application:
fig. 1 is a schematic flow chart of signal receiving processing in the prior art, specifically, a flow chart of receiving data by an uplink PUSCH channel (Physical Uplink Shared Channel, uplink synchronous shared channel) on an eNB (base station) side in the prior art, as shown in fig. 1, in the prior art, a process of receiving the data by the uplink PUSCH channel generally includes a series of processing such as time domain decp (cyclic prefix), FFT (fourier transform), channel estimation and measurement, equalization, de-layer mapping, demodulation, descrambling, bit-level decoding and decrc (Cyclic Redundancy Check ), and then a final uplink crc result and TB stream (Transport Block Stream ) are obtained.
Specifically, time domain decp: i.e. removing the CP portion of the received time domain signal, to obtain the original time domain signal.
FFT: the time domain signal from which the cyclic prefix is removed is subjected to a fast fourier transform to convert the time domain signal into a frequency domain signal.
Channel estimation and measurement: channel estimation is performed on the received frequency domain signal by using a known reference signal (such as downlink channel state information or a special reference signal) to obtain an estimated value of the channel.
Equalization: and carrying out equalization processing on the received frequency domain signal by using the obtained channel estimation value to offset distortion and interference caused by a channel.
De-layer mapping: the equalized frequency domain signal is de-mapped and each OFDM symbol (Orthogonal Frequency Division Multiplexing Symbol ) is mapped to a corresponding modulation symbol.
Demodulation: the de-mapped modulation symbols are demodulated and converted into a bit stream.
Descrambling: and descrambling the demodulated bit stream, and removing the scrambling code added by the transmitting end.
bit-level decoding and CRC decoding: decoding the descrambled bit stream to restore the information sent by the sending end and performing CRC check to obtain an uplink CRC result and a TB (Transport Block) stream.
Finally, after the processing, the receiving end can obtain the uplink CRC result and the transport block stream for subsequent processing and judgment.
In practical applications, in the scheme in the prior art, the uplink PUSCH channel receiving processing information is easily interfered by other co-frequency neighboring cells (such as other base stations that communicate with the current base station on the same frequency), especially some strong narrowband interference.
When strong narrowband interference exists, because the number of packets for uplink crc error decoding is large due to the interference, the current receiving algorithm carries out channel estimation, equalization and demodulation on the frequency domain data after FFT of the scheduling UE (user terminal) in each uplink TTI (transmission time interval), if the strong interference exists on some RBs (resource blocks) scheduled by the UE in the TTI, the interference is introduced during demodulation, thus the subsequent bit level decoding and crc error decoding are caused, therefore, when the strong narrowband interference exists, the receiving performance of the uplink PUSCH channel at the eNB side is obviously reduced, and the uplink average rate is obviously reduced.
Method embodiment:
fig. 2 is a flow chart of an anti-interference signal receiving method according to an embodiment of the present invention, referring to fig. 2, the anti-interference signal receiving method according to the embodiment at least includes the following steps:
s101, generating a noise power sequence based on preset information and a signal received through a target channel.
Specifically, idle load RE (Resource Element) information on RBs scheduled by the UE on pilot symbols, that is, idle load reference information of a target user scheduling resource block, may be obtained based on preset information and a signal received through a PUSCH channel, and a noise power sequence is calculated and generated based on the idle load RE (Resource Element) information, where the noise power sequence includes a series of noise power values.
S102, determining a first threshold value based on the minimum value in the noise power sequence and a preset noise power threshold value.
Specifically, a noise power threshold value may be preset, and after the noise power sequence is obtained, the first threshold value is selected and determined according to the minimum value in the noise power sequence or a value obtained after processing based on the minimum value and the size of the noise power threshold value.
S103, generating a target sequence based on the noise power sequence and the first threshold value.
And S104, weighting soft information based on the target sequence, wherein the soft information is used for demodulating a signal received through a target channel.
S105, demodulating the signal received through the target channel based on the weighted soft information.
And processing the first threshold value and the noise power sequence to obtain a target sequence for weighting soft information in the demodulation process, and demodulating according to the weighted soft information when demodulating the signal received by the PUSCH later.
According to the anti-interference signal receiving method, firstly, a noise power sequence is generated based on preset information and signals received through a target channel; determining a first threshold based on a minimum value in the noise power sequence and a preset noise power threshold value; generating a target sequence based on the noise power sequence and the first threshold; weighting soft information based on the target sequence, the soft information being used to demodulate a signal received over the target channel; the signal received through the target channel is demodulated based on the weighted soft information. Thus, the soft information during demodulation is weighted based on the noise power sequence, so that the influence of interference on demodulation performance is reduced, and the anti-interference capability of data processing is improved.
Further, in some embodiments of the present application, determining the first threshold based on the minimum value in the noise power sequence and the preset noise power threshold value may specifically include:
determining a minimum threshold based on a minimum value in the noise power sequence; if the minimum threshold is smaller than the preset noise power threshold, taking the preset noise power threshold as a first threshold; and if the minimum threshold is greater than or equal to the preset noise power threshold, taking the minimum threshold as the first threshold.
For example, a minimum value is found in the generated noise power sequence, for example, defined as "ni_min", then a minimum threshold value is determined according to "ni_min", an addition may be performed on the basis of "ni_min", for example, the value of "ni_min+9db" is taken as a minimum threshold value, then the minimum value is compared with a noise power threshold value set in advance, if "ni_min+9db" is smaller than the set noise power threshold value, the noise power threshold value is taken as a first threshold value, otherwise "ni_min+9db" is taken as the first threshold value.
On this basis, the specific process of generating the target sequence based on the first threshold may be:
the noise power sequence obtained in the above embodiment is inverted and multiplied by the first threshold to obtain a new sequence, i.e. a base sequence, and then the base sequence is further processed, for example, a value greater than 1 in the base sequence is set to 1, and a reserved original value smaller than 1 is finally obtained, so as to obtain a scale sequence, i.e. a target sequence.
When the signal (i.e. the signal received through the PUSCH channel) is demodulated subsequently, the target sequence is only required to be multiplied by the soft information in the demodulation process as a weight, and then the demodulation is performed based on the result of the multiplication, i.e. the weighted soft information.
It can be understood that, by the scheme of the above embodiment of the present application, the confidence weighting manner of the demodulated soft information can be: the non-interference sub-band scale value is 1, namely the original demodulation soft information is not influenced; the scale value of the sub-band with serious interference is very small, and the scale value is smaller as the interference is larger, so that the purpose of reducing the confidence coefficient of the soft information of the interference sub-band after the soft information of the interference sub-band is weighted during demodulation is achieved, the influence of the interference sub-band on the demodulation performance is reduced, and the probability of crc solution is improved.
It should be noted that, the anti-interference signal receiving method provided in the present application only corrects the content related to demodulation in the PUSCH channel receiving and processing information process, while other PUSCH channel receiving and processing information processes may be understood with reference to the PUSCH channel receiving and processing information process in the prior art, and fig. 3 is a complete flowchart of the anti-interference signal receiving method provided in the embodiment of the present invention, as shown in fig. 3:
in practical application, similar to the scheme in the prior art, the steps including time domain decp, FFT, channel estimation and measurement as mentioned in the application are performed, and after the channel estimation and measurement flow is performed, the process of calculating the noise power sequence mentioned in the above embodiment is performed to obtain the target sequence; then, processes such as equalization, de-layer mapping and the like are carried out; the soft information in the demodulation process is weighted based on the scale sequence and the target sequence, and then demodulation is carried out based on the weighted soft information; and finally, carrying out processes such as descrambling, bit-level decrc and the like.
According to the anti-interference signal receiving method, in the uplink PUSCH receiving processing process of the eNB side, a noise power sequence is calculated according to idle RE on the RB scheduled by the UE on a pilot frequency symbol before demodulation, then a scale sequence is generated by utilizing the noise power sequence, soft information is weighted by taking the scale sequence as a weight during demodulation, and therefore the effect of the PUSCH receiving processing can be effectively improved. Fig. 4 is an uplink traffic monitoring diagram of prior art communication, that is, detection of a method not optimized by the application in the prior art, fig. 5 is an uplink traffic monitoring diagram of an anti-interference signal receiving method provided by an embodiment of the present invention, that is, a result of optimization by the method provided by the application, and in fig. 4 and fig. 5, UL Txpower refers to uplink transmission power, that is, transmission power used by a transmitting end device when performing uplink communication; UL Throughput refers to the uplink Throughput, i.e. the data transmission rate that can be achieved by the sender device when performing uplink communication. And compared with the two flow monitoring results, under the same narrow-band interference test scene, the uplink average flow is improved from the original 80M to 105M, 31% of the uplink average flow is improved, and the improvement effect is obvious.
Device example:
based on the same inventive concept, the application also provides an anti-interference signal receiving device for realizing the method embodiment. Fig. 6 is a schematic structural diagram of an anti-interference signal receiving device according to an embodiment of the present invention, as shown in fig. 6, the device may include:
a first calculation module 61, configured to generate a noise power sequence based on preset information and a signal received through a target channel;
a second calculation module 62, configured to determine a first threshold based on a minimum value in the noise power sequence and a preset noise power threshold value;
a third calculation module 63, configured to generate a target sequence based on the noise power sequence and the first threshold value;
a weighting module 64 for weighting soft information based on the target sequence, the soft information being used to demodulate a signal received over a target channel;
a demodulation module 65, configured to demodulate a signal received through the target channel based on the weighted soft information.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Device example:
based on the same inventive concept, the invention also provides an anti-interference signal receiving method for realizing the method embodiment. Fig. 7 is a schematic structural diagram of an anti-interference signal receiving device according to an embodiment of the present invention, as shown in fig. 7, the anti-interference signal receiving device of the present embodiment includes a processor 71 and a memory 72, where the processor 71 is connected to the memory 72. Wherein the processor 71 is configured to invoke and execute the program stored in the memory 72; the memory 72 is used to store the program at least for executing the interference-free signal receiving method in the above embodiment.
Specific implementation manners of the anti-interference signal receiving apparatus provided in the embodiments of the present application may refer to implementation manners of the anti-interference signal receiving method in any of the above embodiments, and are not repeated herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (8)
1. An anti-interference signal receiving method, comprising:
generating a noise power sequence based on preset information and a signal received through a target channel;
determining a first threshold based on a minimum value in the noise power sequence and a preset noise power threshold value;
generating a target sequence based on the noise power sequence and the first threshold;
weighting soft information based on the target sequence, the soft information being used to demodulate a signal received over a target channel;
the signal received through the target channel is demodulated based on the weighted soft information.
2. The method of claim 1, wherein generating the noise power sequence based on the preset information and the signal received through the target channel comprises:
and calculating and generating the noise power sequence based on the preset information and idle reference information of the target user scheduling resource block in the signal received through the target channel.
3. The method of claim 1, wherein the determining the first threshold based on the minimum value in the noise power sequence and a preset noise power threshold value comprises:
determining a minimum threshold based on a minimum value in the noise power sequence;
if the minimum threshold is smaller than the preset noise power threshold, taking the preset noise power threshold as the first threshold;
and if the minimum threshold is greater than or equal to the preset noise power threshold, taking the minimum threshold as the first threshold.
4. The method of claim 1, wherein generating a target sequence based on the noise power sequence and the first threshold comprises:
multiplying the result of the inverse of the noise power sequence by the first threshold value to obtain a basic sequence;
and modifying a value larger than a second threshold value in the basic sequence to the second threshold value to obtain the target sequence.
5. The method of claim 1, wherein the weighting soft information based on the target sequence comprises:
and multiplying the target sequence serving as a weight value with the soft information to obtain weighted soft information.
6. The method of claim 1, wherein the target channel comprises a PUSCH channel.
7. An anti-interference signal receiving apparatus, comprising:
the first calculation module is used for generating a noise power sequence based on preset information and a signal received through a target channel;
the second calculation module is used for determining a first threshold value based on the minimum value in the noise power sequence and a preset noise power threshold value;
a third calculation module for generating a target sequence based on the noise power sequence and the first threshold;
a weighting module for weighting soft information based on the target sequence, the soft information being used for demodulating a signal received over a target channel;
and the demodulation module is used for demodulating the signals received through the target channel based on the weighted soft information.
8. An anti-interference signal receiving device, comprising a processor and a memory, wherein the processor is connected with the memory:
the processor is used for calling and executing the program stored in the memory;
the memory is configured to store the program at least for executing the anti-interference signal receiving method according to any one of claims 1 to 6.
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