CN111654459B - Signal processing method, terminal and storage medium - Google Patents
Signal processing method, terminal and storage medium Download PDFInfo
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- CN111654459B CN111654459B CN202010414715.7A CN202010414715A CN111654459B CN 111654459 B CN111654459 B CN 111654459B CN 202010414715 A CN202010414715 A CN 202010414715A CN 111654459 B CN111654459 B CN 111654459B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03305—Joint sequence estimation and interference removal
Abstract
The embodiment of the application discloses a signal processing method, a terminal and a storage medium, wherein the method comprises the following steps: under the condition that a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points is received, acquiring an overlapped scene corresponding to the mixed signal; wherein, the overlapped scene represents the overlapping condition of signals from different transmission points on a frequency domain in the mixed signal; determining a target receiver using the overlapping scenes; and demodulating signals transmitted by different transmission points in at least two transmission points in the mixed signals by using the target receiver to obtain at least two demodulation results.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a signal processing method, a terminal and a storage medium.
Background
In the fifth generation mobile communication technology, incoherent joint transmission (Non-Coherent Joint Transmission, NC-JT) may be employed in order to improve cell coverage or improve throughput. NC-JT is a scenario for multiple transmission point transmission.
In NC-JT, multiple transmission points transmit signals to the same terminal simultaneously or time-division, and the transmission points may be unsynchronized. In addition, the multiple transmission points may respectively transmit different physical data shared channels (Physical Data Shared Channel, PDSCH), or may transmit different streams of the same PDSCH. From the frequency domain direction, there are three possibilities for data transmitted by different transmission points, including: completely misaligned, partially coincident, and completely coincident.
At present, in the process of channel estimation (Channel Estimation, EST) and Demodulation (DEMOD), signals transmitted by a current transmission point are processed independently with signals of other transmission points, or signals of other transmission points are regarded as adjacent cell interference, and only statistical information is used for interference suppression, so that the flexibility and performance of signal processing are poor.
Disclosure of Invention
The embodiment of the application provides a signal processing method, a terminal and a storage medium, which are used for distinguishing scenes of multiple transmission points and selecting corresponding receivers according to the scenes to perform signal processing, so that the flexibility and the performance of the signal processing are improved.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a signal processing method, which comprises the following steps:
acquiring an overlapped scene corresponding to a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points under the condition that the mixed signal is received; wherein the overlapping scene characterizes the overlapping condition of signals from different transmission points in the mixed signal on a frequency domain;
determining a target receiver using the overlapping scene;
and demodulating signals transmitted by different transmission points in the at least two transmission points in the mixed signal by using the target receiver to obtain at least two demodulation results.
In the above method, the determining the target receiver by using the overlapped scene includes:
determining that the target receiver is an interference suppression combined receiver under the condition that the overlapped scene is a completely non-overlapped scene or a non-overlapped part in a partially overlapped scene;
in the case that the overlapping scene is a completely overlapping scene or an overlapping portion in the partially overlapping scene, the target receiver is determined from an enhanced interference rejection combining receiver and a joint detection receiver.
In the above method, the determining the target receiver from the enhanced interference rejection combining receiver and the joint detection receiver includes:
acquiring a signal-to-noise ratio and a synchronization difference between the at least two transmission points;
under the condition that the signal-to-noise ratio is in a preset ratio range and the synchronization difference is in a preset duration range, determining that the target receiver is the joint detection receiver;
and determining the target receiver as the enhanced interference suppression combined receiver under the condition that the signal-to-noise ratio exceeds the preset ratio range or the synchronization difference exceeds the preset duration range.
In the above method, before demodulating, by the target receiver, signals transmitted by different transmission points of the at least two transmission points in the mixed signal to obtain at least two demodulation results, the method further includes:
And acquiring reference signals corresponding to different transmission points in the at least two transmission points from the mixed signal to obtain at least two reference signals.
In the above method, the target receiver is an interference suppression combining receiver, and the demodulating, by using the target receiver, signals transmitted by different transmission points in the at least two transmission points in the mixed signal to obtain at least two demodulation results includes:
using the interference suppression combined receiver to respectively perform channel estimation and noise estimation according to each reference signal in the at least two reference signals to obtain at least two groups of channel estimation results and at least two noise estimation results; wherein each set of channel estimation results comprises different types of channel estimation results;
and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
In the above method, the target receiver is an interference suppression enhancing combining receiver, and the demodulating, by using the target receiver, signals transmitted by different transmission points in the at least two transmission points in the mixed signal to obtain at least two demodulation results includes:
Using the enhanced interference suppression combined receiver to respectively perform channel estimation according to each reference signal in the at least two reference signals under the condition that the at least two reference signals have no collision phenomenon, so as to obtain at least two groups of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results;
for different transmission points in the at least two transmission points, respectively carrying out noise estimation based on the at least two groups of channel estimation results to obtain at least two noise estimation results;
and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
In the above method, the target receiver is a joint detection receiver, and the demodulating, by using the target receiver, signals transmitted by different transmission points in the at least two transmission points in the mixed signal, to obtain at least two demodulation results includes:
respectively carrying out channel estimation according to each reference signal in the at least two reference signals by utilizing the joint detection receiver to obtain at least two groups of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results;
Performing noise estimation based on the mixed signal, the at least two reference signals and the at least two groups of channel estimation results to obtain a target noise estimation result;
and demodulating based on the at least two groups of channel estimation results, the target noise estimation result and the mixed signal to obtain at least two demodulation results.
In the above method, the demodulating, by using the target receiver, signals transmitted by different transmission points of the at least two transmission points in the mixed signal, so as to obtain at least two demodulation results, where the method further includes:
and decoding the at least two demodulation results to obtain decoding results.
The embodiment of the application provides a terminal, which comprises:
the acquisition module is used for acquiring an overlapped scene corresponding to a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points under the condition that the mixed signal is received; wherein the overlapping scene characterizes the superposition condition of signals from different transmission points in the mixed signal on a frequency domain;
a determining module, configured to determine a target receiver using the coincidence scene;
And the processing module is used for demodulating signals transmitted by different transmission points in the at least two transmission points in the mixed signal by utilizing the target receiver and utilizing the target receiver to obtain at least two demodulation results.
In the above terminal, the determining module is specifically configured to determine that the target receiver is an interference suppression combined receiver when the overlapped scene is a completely non-overlapped scene or a non-overlapped part in a partially overlapped scene; in the case that the overlapping scene is a completely overlapping scene or an overlapping portion in the partially overlapping scene, the target receiver is determined from an enhanced interference rejection combining receiver and a joint detection receiver.
In the above terminal, the determining module is specifically configured to obtain a signal-to-noise ratio and a synchronization difference between the at least two transmission points; under the condition that the signal-to-noise ratio is in a preset ratio range and the synchronization difference is in a preset duration range, determining that the target receiver is the joint detection receiver; and determining the target receiver as the enhanced interference suppression combined receiver under the condition that the signal-to-noise ratio exceeds the preset ratio range or the synchronization difference exceeds the preset duration range.
In the above terminal, the processing module is further configured to obtain reference signals corresponding to different transmission points in the at least two transmission points from the mixed signal, so as to obtain at least two reference signals.
In the above terminal, the target receiver is an interference suppression combined receiver, and the processing module is specifically configured to perform channel estimation and noise estimation according to each of the at least two reference signals by using the interference suppression combined receiver, so as to obtain at least two sets of channel estimation results and at least two noise estimation results; wherein each set of channel estimation results comprises different types of channel estimation results; and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
In the above terminal, the target receiver is an enhanced interference suppression combined receiver, and the processing module is specifically configured to utilize the enhanced interference suppression combined receiver to perform channel estimation according to each of the at least two reference signals to obtain at least two sets of channel estimation results when the at least two reference signals do not have a collision phenomenon; for different transmission points in the at least two transmission points, respectively carrying out noise estimation based on the at least two groups of channel estimation results to obtain at least two noise estimation results; and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
In the above terminal, the target receiver is a joint detection receiver, and the processing module is specifically configured to perform channel estimation according to each of the at least two reference signals by using the joint detection receiver, so as to obtain at least two sets of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results; performing noise estimation based on the mixed signal, the at least two reference signals and the at least two groups of channel estimation results to obtain a target noise estimation result; and demodulating based on the at least two groups of channel estimation results, the target noise estimation result and the mixed signal to obtain at least two demodulation results.
In the above terminal, the processing module is further configured to decode the at least two demodulation results to obtain a decoded result.
The embodiment of the application provides a terminal, which comprises: a processor, a memory, and a communication bus;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor is configured to execute a signal processing program stored in the memory, so as to implement the signal processing method.
The embodiment of the application provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the above-mentioned signal processing method.
The embodiment of the application provides a signal processing method, a terminal and a storage medium, wherein the method comprises the following steps: under the condition that a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points is received, acquiring an overlapped scene corresponding to the mixed signal; wherein, the overlapped scene represents the overlapping condition of signals from different transmission points on a frequency domain in the mixed signal; determining a target receiver using the overlapping scenes; and demodulating signals transmitted by different transmission points in at least two transmission points in the mixed signals by using the target receiver to obtain at least two demodulation results. According to the technical scheme provided by the embodiment of the application, the scenes of the multiple transmission points are distinguished, and the corresponding receivers are selected according to the scenes to perform signal processing, so that the flexibility and the performance of the signal processing are improved.
Drawings
Fig. 1 is a schematic flow chart of a signal processing method according to an embodiment of the present application;
FIG. 2 (a) is a schematic diagram of an exemplary overlapping scenario provided in an embodiment of the present application;
FIG. 2 (b) is a schematic diagram of an exemplary overlapping scenario II provided in an embodiment of the present application;
FIG. 2 (c) is a schematic diagram III of an exemplary overlapping scenario provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of an exemplary signal processing procedure according to an embodiment of the present application;
fig. 4 is a schematic diagram of an exemplary interference rejection combining receiver processing procedure according to an embodiment of the present application;
fig. 5 is a schematic diagram of an exemplary enhanced interference rejection combining receiver processing procedure provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of an exemplary joint detection receiver processing procedure according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a second terminal according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The embodiment of the application provides a signal processing method, which is realized through a terminal, wherein the terminal can be specifically electronic equipment such as a mobile phone, a tablet personal computer and the like, and the embodiment of the application is not limited. Fig. 1 is a schematic flow chart of a signal processing method according to an embodiment of the present application. As shown in fig. 1, the signal processing method mainly includes the following steps:
S101, under the condition that a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points is received, acquiring an overlapped scene corresponding to the mixed signal; wherein, the overlapping scene represents the overlapping condition of signals from different transmission points on the frequency domain in the mixed signal.
In the embodiment of the present application, when the terminal receives a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points, the terminal needs to acquire an overlapping situation of signals from different transmission points on a frequency domain, that is, an overlapping scene corresponding to the mixed signal, in the mixed signal.
It should be noted that, in the embodiment of the present application, one transmission point may be equivalent to one base station, and each of at least two transmission points may transmit signals to be transmitted to a terminal separately, where the signals are mixed together to form a mixed signal. The specific number of transmission points and the mixed signal are not limited in this embodiment.
In the embodiment of the present application, the terminal may acquire information about whether signals transmitted by different transmission points overlap in the frequency domain direction, so as to determine an overlapping scene, and the specific acquisition mode is not limited in the embodiment of the present application.
Fig. 2 (a) to 2 (c) are schematic diagrams of three overlapping scenarios provided in the embodiments of the present application. As shown in fig. 2 (a), the signals transmitted by the transmission point 1 and the transmission point 2 are completely misaligned in the frequency domain direction, that is, the overlapped scene is a completely misaligned scene. As shown in fig. 2 (b), the signals transmitted by the transmission point 1 and the transmission point 2 partially overlap in the frequency domain direction, that is, the overlapping scene is a partially overlapping scene. As shown in fig. 2 (c), the signals transmitted by the transmission point 1 and the transmission point 2 are completely overlapped in the frequency domain direction, that is, the overlapped scene is a completely overlapped scene.
S102, determining a target receiver by utilizing the overlapped scene.
In the embodiment of the application, after acquiring the overlapped scene, the terminal further can determine the target receiver by using the overlapped scene.
Specifically, in an embodiment of the present application, a terminal determines a target receiver using an overlapping scenario, including: under the condition that the overlapped scene is a completely non-overlapped scene or a non-overlapped part in a partially overlapped scene, determining the target receiver as an interference suppression combined receiver; in the case where the overlapping scene is a completely overlapping scene or an overlapping portion in a partially overlapping scene, the target receiver is determined from the enhanced interference suppression combining receiver and the joint detection receiver.
In the embodiment of the present application, the overlapping condition of the signals from different transmission points in the frequency domain in the mixed signal may be a completely non-overlapping scene or a completely overlapping scene, or may be an overlapping portion or a non-overlapping portion in a partially overlapping scene. The partial coincidence scene refers to a part of scenes in which signals are transmitted integrally by at least two transmission points, wherein the part of scenes are not coincident or coincident.
It should be noted that, in the embodiment of the present application, the interference rejection combining (Interference Rejection Combining, IRC) receiver is mainly characterized by: noise estimation and demodulation processes are performed for signals corresponding to the respective transmission points, respectively. The main characteristics of the enhanced interference rejection combining (Enhanced Interference Rejection Combining, eIRC) receiver are: the signals of the transmission points are processed in a joint manner during noise estimation, and the signals corresponding to the transmission points are processed separately during demodulation. The main specific features of Joint Detection (JD) receivers are: noise estimation and demodulation are performed by joint processing of signals corresponding to the respective transmission points.
It should be noted that in the embodiment of the present application, different overlapping scenarios correspond to different types of receivers, where the enhanced interference suppression combining receiver and the joint detection receiver may operate in the same scenario, and the terminal selects the target receiver from the two, mainly depending on the signal-to-noise ratio and the synchronization state between at least two transmission points.
Specifically, in an embodiment of the present application, the determining, by the terminal, the target receiver from the enhanced interference rejection combining receiver and the joint detection receiver includes: acquiring a signal-to-noise ratio and a synchronization difference between at least two transmission points; under the condition that the signal-to-noise ratio is in a preset ratio range and the synchronization difference is in a preset duration range, determining that the target receiver is a joint detection receiver; and under the condition that the signal-to-noise ratio exceeds a preset ratio range or the synchronization difference exceeds a preset duration range, determining the target receiver as an enhanced interference suppression combined receiver.
It may be appreciated that in the embodiments of the present application, the selection of the enhanced interference rejection combining receiver and the joint detection receiver, the terminal determines the target receiver as the joint detection receiver in the case that the signal-to-noise ratio and the synchronization state between at least two transmission points simultaneously satisfy a specific condition, and determines the target receiver as the enhanced interference rejection combining receiver as long as one condition is not satisfied.
S103, demodulating signals transmitted by different transmission points in at least two transmission points in the mixed signal by using the target receiver to obtain at least two demodulation results.
In the embodiment of the present application, after determining the target receiver, the terminal further demodulates, by using the target receiver, signals transmitted by different transmission points in at least two transmission points in the mixed signal, to obtain at least two demodulation results.
It will be appreciated that in embodiments of the present application, the terminal determines the target receiver based on overlapping scenarios, while different overlapping scenarios correspond to different target receivers, and thus the manner in which the terminal demodulates depends on the selected target receiver.
It should be noted that, in the embodiment of the present application, as shown in fig. 3, the terminal may receive the mixed signal by using a radio frequency circuit, then perform analog-to-digital conversion and digital front-end processing on the mixed signal, and then demodulate signals transmitted by different transmission points in at least two transmission points in the mixed signal by using a target receiver to obtain at least two demodulation results, where the conversion process is actually to select the target receiver from three receivers correspondingly, so as to perform signal demodulation. In addition, after obtaining at least two demodulation results, the terminal may further perform the following steps: and decoding at least two demodulation results to obtain a decoding result.
It should be noted that, in the embodiment of the present application, when decoding at least two demodulation results, under the condition that at least two transmission points respectively transmit different physical data shared channels, the terminal respectively performs decoding processing on at least two demodulation results to obtain at least two corresponding decoding results. And transmitting different streams of the same physical data sharing channel at least two transmission points, and combining at least two demodulation results by the terminal to perform decoding processing to obtain a decoding result.
It should be noted that, in the embodiment of the present application, the terminal demodulates, by using the target receiver, signals transmitted by different transmission points in at least two transmission points in the mixed signal, and before obtaining at least two demodulation results, further performs the following steps: and acquiring reference signals corresponding to different transmission points in at least two transmission points from the mixed signal to obtain at least two reference signals.
The manner in which noise estimation and demodulation are implemented for different target receivers is detailed below.
Specifically, in the embodiment of the present application, when the target receiver is an interference suppression combining receiver, the terminal demodulates signals transmitted by different transmission points in at least two transmission points in the mixed signal by using the target receiver to obtain at least two demodulation results, where the demodulation results include: using an interference suppression combined receiver to respectively perform channel estimation and noise estimation according to each of at least two reference signals to obtain at least two groups of channel estimation results and at least two noise estimation results; wherein each set of channel estimation results comprises different types of channel estimation results; and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation based on the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain at least two demodulation results.
Fig. 4 is a schematic diagram of an exemplary interference suppression combining receiver processing procedure according to an embodiment of the present application. As shown in fig. 4, the terminal uses an interference rejection combining receiver to process signals for each of the two transmission points separately.
It should be noted that, in the embodiment of the present application, the terminal performs signal demodulation by using the interference suppression combining receiver, specifically, for any one of at least two transmission points, that is, the transmission point i, the input of the channel estimation is a corresponding reference signal, and different types of channel estimation results can be obtained by using the reference signal, which are respectively the least square channel estimation results H LS,RS,i,k And filtering the channel estimation result H Filter,RS,i,k Form oneAs a result of group channel estimation, k represents an index of reference signal resources, and if N reference signal resources are shared in a certain time-frequency region, k=1, … …, N, and noise estimation can be implemented according to the following formulas (1) and (2):
n RS,i,k ＝H LS,RS,i,k -H Filter,RS,i,k (1)
wherein R is nn,RS,i,k And (5) obtaining a noise estimation result corresponding to the transmission point i. After that, the terminal can send R nn,RS,i The method comprises the steps of obtaining a set of channel estimation results corresponding to a transmission point i, and obtaining a set of filtering channel estimation results in the set of channel estimation results corresponding to the transmission point i, and demodulating signals transmitted by the transmission point i by taking the mixed signals as demodulated input signals to obtain corresponding demodulation results.
Specifically, in the embodiment of the present application, in the case where the target receiver is an interference-enhanced combining receiver, the terminal demodulates, by using the target receiver, signals transmitted by different transmission points in at least two transmission points in the mixed signal to obtain at least two demodulation results, where the demodulation results include: under the condition that at least two reference signals do not have collision phenomenon, respectively carrying out channel estimation according to each reference signal in the at least two reference signals by utilizing an enhanced interference suppression combined receiver to obtain at least two groups of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results; for different transmission points in at least two transmission points, respectively carrying out noise estimation based on at least two groups of channel estimation results to obtain at least two noise estimation results; and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation based on the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain at least two demodulation results.
Fig. 5 is a schematic diagram of an exemplary processing procedure of an enhanced interference rejection combining receiver according to an embodiment of the present application. As shown in fig. 5, the terminal performs signal demodulation using the enhanced interference suppression combining receiver, performs signal combining processing for two transmission points at the time of noise estimation, and performs signal separation processing for the two transmission points at the time of demodulation.
In the case where at least two transmission points are two transmission points, the set of channel estimation results obtained by channel estimation using the reference signal corresponding to transmission point 1 includes H LS,RS,1,k And H Filter,RS,1,k The set of channel estimation results obtained by signal estimation by using the reference signals corresponding to the transmission point 2 is H LS,RS,2,k 、H Filter,RS,2,k . For transmission point 1, also, k represents the index of the reference signal resource, and the following equations (3) and (4) may be used for noise estimation:
n RS,1,k ＝H LS,RS,1,k -H Filter,RS,1,k (3)
wherein R is nn,RS,1 The result of the noise estimation corresponding to the transmission point 1. After that, the terminal can send R nn,RS,1 The signal of the transmission point 1 is demodulated by taking the mixed signal as a demodulated input signal to obtain a corresponding demodulation result. In addition, the noise estimation for the transmission point 2 and the subsequent signal demodulation method are similar to those of the transmission point 1, and will not be described herein.
It should be noted that, in the embodiment of the present application, at least two reference signals have no collision phenomenon, including: at least two reference signals do not collide on Resource Elements (REs) and with data signals in the mixed signal, and are suitable for noise estimation by using the above formula (3) and formula (4). In addition, in the case that at least two reference signals do not collide, but collide with the data signal, or at least two reference signals collide, the manner in which the terminal performs noise estimation by using the enhanced interference suppression combined receiver is the same as that of the interference suppression combined receiver described above, that is, the noise estimation is performed by using the formula (1) and the formula (2), which will not be described herein.
Specifically, in the embodiment of the present application, in the case where the target receiver is a joint detection receiver, the terminal demodulates signals transmitted by different transmission points in at least two transmission points in the mixed signal by using the target receiver to obtain at least two demodulation results, where the demodulation results include: respectively carrying out channel estimation according to each reference signal in at least two reference signals by utilizing a joint detection receiver to obtain at least two groups of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results; performing noise estimation based on the mixed signal, at least two reference signals and at least two groups of channel estimation results to obtain a target noise estimation result; and demodulating based on at least two groups of channel estimation results, target noise estimation results and the mixed signal to obtain at least two demodulation results.
Fig. 6 is a schematic diagram of an exemplary joint detection receiver processing procedure according to an embodiment of the present application. As shown in fig. 6, the terminal performs signal joint processing corresponding to two transmission points at the time of noise estimation and demodulation using a joint detection receiver.
In the case where at least two transmission points are two transmission points, the set of channel estimation results obtained by channel estimation using the reference signal corresponding to transmission point 1 includes H LS，RS，1，k And H Filter，RS，1，k The set of channel estimation results obtained by signal estimation by using the reference signal corresponding to the transmission point 2 comprises H LS，RS，2，m And H Filter，RS，2，m . k and m each represent an index of a reference signal resource. If the reference signals of the two transmission points are not collided and the reference signals are not collided with the data signals, the terminal may perform noise estimation using the following formulas (5) to (7):
n RS，1，k ＝H LS，RS，1，k -H Filter，RS，1，k (5)
n RS，2，m ＝H LS，RS，2，m -H Filter，RS，2，m (6)
furthermore, if the reference signals of two transmission points are collided, the terminal may perform noise estimation using the following equations (8) and (9):
n RS,k ＝y LS,RS,k -H Filter,RS,1,k X RS,1,k -H Filter,RS,2,k X RS,2,k (8)
wherein y is LS,RS,k X is the signal received at resource k in the mixed signal RS,1,k For the reference signal of transmission point 1 at resource k, X RS,2,k For the reference signal of transmission point 2 at resource k, R nn,RS And estimating a result for the target noise.
It can be appreciated that in the embodiment of the present application, after obtaining the target noise estimation result, the terminal may perform R nn,RS And the filtering channel estimation result and the mixed signal of each of at least two groups of channel estimation results are used as demodulated input signals to be demodulated, so that the demodulation results of the signals transmitted by different transmission points are obtained.
The embodiment of the application provides a signal processing method, which comprises the following steps: under the condition that a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points is received, acquiring an overlapped scene corresponding to the mixed signal; wherein, the overlapped scene represents the overlapped condition of signals from different transmission points on a frequency domain in the mixed signal; determining a target receiver using the overlapping scenes; and demodulating signals transmitted by different transmission points in at least two transmission points in the mixed signals by using the target receiver to obtain at least two demodulation results. According to the technical scheme provided by the embodiment of the application, the scenes of the multiple transmission points are distinguished, and the corresponding receivers are selected according to the scenes to perform signal processing, so that the flexibility and the performance of the signal processing are improved.
The embodiment of the application also provides a terminal. Fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 7, the terminal includes:
an obtaining module 701, configured to obtain, when a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points is received, an overlapping scene corresponding to the mixed signal; wherein, the overlapped scene represents the superposition condition of signals from different transmission points in the mixed signal on a frequency domain;
a determining module 702, configured to determine a target receiver using the coincident scene;
and the processing module 703 is configured to demodulate, by using the target receiver, signals transmitted by different transmission points in the at least two transmission points in the mixed signal by using the target receiver, so as to obtain at least two demodulation results.
In an embodiment of the present application, the determining module 702 is specifically configured to determine that the target receiver is an interference suppression combined receiver when the overlapped scene is a completely non-overlapped scene or a non-overlapped part in a partially overlapped scene; in the case that the overlapping scene is a completely overlapping scene or an overlapping portion in the partially overlapping scene, the target receiver is determined from an enhanced interference rejection combining receiver and a joint detection receiver.
In an embodiment of the present application, the determining module 702 is specifically configured to obtain a signal-to-noise ratio and a synchronization difference between the at least two transmission points; under the condition that the signal-to-noise ratio is in a preset ratio range and the synchronization difference is in a preset duration range, determining that the target receiver is the joint detection receiver; and determining the target receiver as the enhanced interference suppression combined receiver under the condition that the signal-to-noise ratio exceeds the preset ratio range or the synchronization difference exceeds the preset duration range.
In an embodiment of the present application, the processing module 703 is further configured to obtain reference signals corresponding to different transmission points in the at least two transmission points from the mixed signal, so as to obtain at least two reference signals.
In an embodiment of the present application, the target receiver is an interference suppression combined receiver, and the processing module 703 is specifically configured to perform channel estimation and noise estimation according to each of the at least two reference signals by using the interference suppression combined receiver, so as to obtain at least two sets of channel estimation results and at least two noise estimation results; and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
In an embodiment of the present application, the target receiver is an enhanced interference suppression combined receiver, and the processing module 703 is specifically configured to perform channel estimation according to each of the at least two reference signals to obtain at least two sets of channel estimation results by using the enhanced interference suppression combined receiver when the at least two reference signals do not have a collision phenomenon; for different transmission points in the at least two transmission points, respectively carrying out noise estimation based on the at least two groups of channel estimation results to obtain at least two noise estimation results; and aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
In an embodiment of the present application, the target receiver is a joint detection receiver, and the processing module 703 is specifically configured to perform channel estimation according to each of the at least two reference signals by using the joint detection receiver, so as to obtain at least two sets of channel estimation results; performing noise estimation based on the mixed signal, the at least two reference signals and the at least two groups of channel estimation results to obtain a target noise estimation result; and demodulating based on the at least two groups of channel estimation results, the target noise estimation result and the mixed signal to obtain at least two demodulation results.
In an embodiment of the present application, the processing module 703 is further configured to decode the at least two demodulation results to obtain a decoded result.
Fig. 8 is a schematic structural diagram of a second terminal according to an embodiment of the present application. As shown in fig. 8, in an embodiment of the present application, a terminal includes: a processor 801, a memory 802, and a communication bus 803;
the communication bus 803 is configured to implement a communication connection between the processor 801 and the memory 802;
the processor 801 is configured to execute a signal processing program stored in the memory 802 to implement the signal processing method described above.
The embodiment of the application provides a terminal, which acquires an overlapped scene corresponding to a mixed signal under the condition that the mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points is received; wherein, the overlapped scene represents the overlapping condition of signals from different transmission points on a frequency domain in the mixed signal; determining a target receiver using the overlapping scenes; and demodulating signals transmitted by different transmission points in at least two transmission points in the mixed signals by using the target receiver to obtain at least two demodulation results. According to the terminal provided by the embodiment of the invention, the scenes of the multiple transmission points are distinguished, and the corresponding receivers are selected according to the scenes to perform signal processing, so that the flexibility and the performance of the signal processing are improved.
The embodiment of the application provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the above-mentioned signal processing method. The computer readable storage medium may be a volatile Memory (RAM), such as a Random-Access Memory (RAM); or a nonvolatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (HDD) or a Solid State Drive (SSD); but may be a respective device, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc., comprising one or any combination of the above memories.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of implementations of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block and/or flow of the flowchart illustrations and/or block diagrams, and combinations of blocks and/or flow diagrams in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart block or blocks and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart block or blocks and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks and/or block diagram block or blocks.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application are intended to be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of signal processing, the method comprising:
acquiring an overlapped scene corresponding to a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points under the condition that the mixed signal is received; wherein the overlapping scene characterizes the overlapping condition of signals from different transmission points in the mixed signal on a frequency domain;
Determining a target receiver based on the overlapping scenes;
demodulating signals transmitted by different transmission points in the at least two transmission points in the mixed signal by using the target receiver to obtain at least two demodulation results;
the determining a target receiver using the overlapping scene includes:
determining that the target receiver is an interference suppression combined receiver under the condition that the overlapped scene is a completely non-overlapped scene or a non-overlapped part in a partially overlapped scene;
in the case that the overlapping scene is a completely overlapping scene or an overlapping portion in the partially overlapping scene, the target receiver is determined from an enhanced interference rejection combining receiver and a joint detection receiver.
2. The method of claim 1, wherein the determining the target receiver from an enhanced interference rejection combining receiver and a joint detection receiver comprises:
acquiring a signal-to-noise ratio and a synchronization difference between the at least two transmission points;
under the condition that the signal-to-noise ratio is in a preset ratio range and the synchronization difference is in a preset duration range, determining that the target receiver is the joint detection receiver;
And determining the target receiver as the enhanced interference suppression combined receiver under the condition that the signal-to-noise ratio exceeds the preset ratio range or the synchronization difference exceeds the preset duration range.
3. The method of claim 1, wherein the demodulating, by the target receiver, the signal transmitted by a different transmission point of the at least two transmission points in the mixed signal, before obtaining at least two demodulation results, further comprises:
and acquiring reference signals corresponding to different transmission points in the at least two transmission points from the mixed signal to obtain at least two reference signals.
4. The method of claim 3, wherein the target receiver is an interference rejection combining receiver, and demodulating, by the target receiver, signals transmitted by different transmission points of the at least two transmission points in the mixed signal to obtain at least two demodulation results comprises:
using the interference suppression combined receiver to respectively perform channel estimation and noise estimation according to each reference signal in the at least two reference signals to obtain at least two groups of channel estimation results and at least two noise estimation results; wherein each set of channel estimation results comprises different types of channel estimation results;
And aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
5. The method of claim 3, wherein the target receiver is an enhanced interference rejection combining receiver, and demodulating, by the target receiver, signals transmitted by different transmission points of the at least two transmission points in the mixed signal to obtain at least two demodulation results comprises:
using the enhanced interference suppression combined receiver to respectively perform channel estimation according to each reference signal in the at least two reference signals under the condition that the at least two reference signals have no collision phenomenon, so as to obtain at least two groups of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results;
for different transmission points in the at least two transmission points, respectively carrying out noise estimation based on the at least two groups of channel estimation results to obtain at least two noise estimation results;
And aiming at different transmission points in the at least two transmission points, respectively carrying out signal demodulation on the basis of the corresponding channel estimation result in the at least two groups of channel estimation results, the corresponding noise estimation result in the at least two noise estimation results and the mixed signal to obtain the at least two demodulation results.
6. The method of claim 1, wherein the target receiver is a joint detection receiver, and demodulating signals transmitted by different transmission points of the at least two transmission points in the mixed signal by using the target receiver to obtain at least two demodulation results comprises:
respectively carrying out channel estimation according to each reference signal in the at least two reference signals by utilizing the joint detection receiver to obtain at least two groups of channel estimation results; wherein each set of channel estimation results comprises different types of channel estimation results;
performing noise estimation based on the mixed signal, the at least two reference signals and the at least two groups of channel estimation results to obtain a target noise estimation result;
and demodulating based on the at least two groups of channel estimation results, the target noise estimation result and the mixed signal to obtain at least two demodulation results.
7. The method of claim 1, wherein the demodulating, by the target receiver, the signal transmitted by a different transmission point of the at least two transmission points in the mixed signal, and obtaining at least two demodulation results, the method further comprises:
and decoding the at least two demodulation results to obtain decoding results.
8. A terminal, the terminal comprising:
the acquisition module is used for acquiring an overlapped scene corresponding to a mixed signal formed by mixing signals transmitted by different transmission points in at least two transmission points under the condition that the mixed signal is received; wherein the overlapping scene characterizes the superposition condition of signals from different transmission points in the mixed signal on a frequency domain;
a determining module, configured to determine a target receiver using the overlapping scene;
the processing module is used for demodulating signals transmitted by different transmission points in the at least two transmission points in the mixed signal by utilizing the target receiver to obtain at least two demodulation results;
the determining module is further configured to determine that the target receiver is an interference suppression combining receiver when the overlapped scene is a completely non-overlapped scene or a non-overlapped part in a partially overlapped scene; in the case that the overlapping scene is a completely overlapping scene or an overlapping portion in the partially overlapping scene, the target receiver is determined from an enhanced interference rejection combining receiver and a joint detection receiver.
9. A terminal, the terminal comprising: a processor, a memory, and a communication bus;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor for executing a signal processing program stored in the memory to implement the signal processing method of any one of claims 1 to 7.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the signal processing method according to any one of claims 1-7.
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