CN112243271A

CN112243271A - Signal processing method, equipment and device

Info

Publication number: CN112243271A
Application number: CN201910641217.3A
Authority: CN
Inventors: 邢艳萍; 缪德山; 王磊
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2021-01-19
Anticipated expiration: 2039-07-16
Also published as: WO2021008306A1; CN112243271B

Abstract

The invention discloses a signal processing method, a device and a device, comprising the following steps: the network side informs the user equipment of the required discrete Fourier transform bandwidth division when the user equipment performs the discrete Fourier transform on the signal; and when the network side sends the signal to the user equipment, performing discrete Fourier transform on the sent signal according to the notified discrete Fourier transform bandwidth division. The user equipment performs inverse discrete Fourier transform on the received signal according to the discrete Fourier transform bandwidth division notified by the network side, or performs inverse discrete Fourier transform on the received signal according to one discrete Fourier transform bandwidth when determining that the inverse discrete Fourier transform is not performed on the received signal according to the discrete Fourier transform bandwidth division notified by the network side. By adopting the invention, the downlink channels of the user equipment with different downlink receiving bandwidth capabilities can still be subjected to frequency division multiplexing on the same symbol on the premise of adopting the discrete Fourier transform to expand the orthogonal frequency division multiplexing waveform.

Description

Signal processing method, equipment and device

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a signal processing method, device, and apparatus.

Background

In a satellite communication system, a downlink (forward) link adopts a DFT-S-OFDM (Discrete-Fourier Transform Spread Orthogonal Frequency Division multiplexing) waveform, so that the flexibility of time-Frequency resource allocation can be fully utilized by an OFDM (Orthogonal Frequency Division multiplexing) system, and at the same time, the PAPR (Peak Average Power Ratio) is reduced.

Fig. 1 is a schematic diagram of a transmission flow of a downlink DFT-S-OFDM waveform, where FFT is Fast Fourier Transform (Fast Fourier Transform), and as shown in fig. 1, a modulation symbol is converted from serial to parallel, then converted into a frequency domain through DFT (Discrete Fourier Transform), and then mapped to a corresponding frequency domain position. Since the transmitting end employs DFT to disperse the signal over the corresponding DFT bandwidth, the receiving end needs to know the DFT bandwidth and perform corresponding Inverse Transform, i.e. IDFT/IFFT (Inverse Discrete Fourier Transform/Inverse Fast Fourier Transform) according to the DFT bandwidth.

If all UEs (User Equipment) have the same downlink bandwidth receiving capability, for example, downlink full bandwidth receiving can be supported, a sending end may use a DFT transform on a downlink symbol, and the DFT bandwidth size may be notified to a terminal in advance. When the downlink signals of a plurality of UEs are multiplexed on the same symbol, the signals of the plurality of UEs are first cascaded, and then DFT conversion is performed according to a uniform DFT bandwidth. At the receiving end, all the UEs perform inverse transformation according to the uniform DFT bandwidth, and then extract their respective signals for post-processing.

The benefit of using the DFT-s-OFDM waveform in the downlink is that PAPR can be minimized.

However, the prior art is not sufficient: when the UEs have different downlink receiving bandwidth capabilities, when the UEs with different capabilities are frequency division multiplexed in the same symbol, the UEs cannot perform transceiving processing according to the uniform DFT bandwidth. At this time, no solution exists how to support UE frequency division multiplexing with different capabilities on the premise of not changing DFT-s-OFDM waveform.

Disclosure of Invention

The invention provides a signal processing method, equipment and a device, which are used for supporting UE frequency division multiplexing with different capabilities on the premise of not changing DFT-s-OFDM waveforms.

The embodiment of the invention provides a signal processing method, which comprises the following steps:

UE receives DFT bandwidth division notified by a network side;

the UE performs IDFT on the received signal according to the DFT bandwidth division notified by the network side, or performs IDFT on the received signal according to one DFT bandwidth when determining that IDFT is not performed on the received signal according to the DFT bandwidth division notified by the network side.

In the implementation, when the UE carries out IDFT on the received signal according to the DFT bandwidth division notified by the network side, if the received signal is in one DFT bandwidth notified by the network side, the UE carries out IDFT on the received signal according to the DFT bandwidth; if the received signal occupies a plurality of DFT bandwidths notified by the network side, the UE performs IDFT on the received signal according to each DFT bandwidth.

In an implementation, when the UE performs IDFT on a received signal according to one DFT bandwidth, the one DFT bandwidth is a DFT bandwidth agreed in advance or a DFT bandwidth notified by the network side.

In implementation, the UE determines whether to perform IDFT on the signal according to DFT bandwidth division notified by the network side according to a predefined rule or according to notification by the network side.

In the implementation, the DFT bandwidth division notified by the network side received by the UE is notified by the network side in one of the following ways:

the network side informs the UE of DFT bandwidth division in a semi-static manner; or the like, or, alternatively,

the network side informs UE of a DFT bandwidth division set in a semi-static manner, and then informs UE of selecting one DFT bandwidth division in the set dynamically; or the like, or, alternatively,

the network side dynamically informs the UE of a DFT bandwidth split.

the network side informs the UE of DFT bandwidth division required when IDFT is carried out on the signal;

and when the network side transmits signals to the UE, the network side performs DFT conversion on the transmitted signals according to the notified DFT bandwidth division, or when the UE is determined not to perform IDFT conversion on the transmitted signals according to the DFT bandwidth division notified by the network side, the network side performs DFT on the transmitted signals according to one DFT bandwidth.

In the implementation, when the network side carries out DFT conversion on the transmission signals according to the notified DFT bandwidth division, if the transmission signals are in one notified DFT bandwidth, the DFT is carried out on the signals according to the DFT bandwidth; and if the transmitted signals occupy the plurality of notified DFT bandwidths, performing DFT on the transmitted signals according to the DFT bandwidths respectively.

In an implementation, the method further comprises the following steps:

and informing the UE whether to perform IDFT on the transmission signal according to the DFT bandwidth division informed by the network side.

In implementation, the network side notifies the UE of DFT bandwidth division required when performing IDFT on a signal in one of the following manners:

the network side dynamically informs the UE of a DFT bandwidth split.

In the implementation, when the network performs DFT on the transmission signal according to one DFT bandwidth, the one DFT bandwidth is a DFT bandwidth agreed in advance or a DFT bandwidth notified by the network.

In implementation, the UE does not perform DFT conversion on the transmission signal according to the DFT bandwidth division notified by the network side, and the UE determines not to perform DFT conversion on the transmission signal according to the DFT bandwidth division notified by the network side according to a predefined rule or according to a notification by the network side.

An embodiment of the present invention provides a user equipment, where the user equipment includes:

a processor for reading the program in the memory, performing the following processes:

after the UE receives the DFT bandwidth division notified by the network side, performing IDFT on the received signal according to the DFT bandwidth division notified by the network side, or when determining that IDFT is not performed on the received signal according to the DFT bandwidth division notified by the network side, performing IDFT on the received signal according to one DFT bandwidth;

a transceiver for receiving and transmitting data under the control of the processor.

In the implementation, when the UE carries out IDFT on the received signal according to the DFT bandwidth division notified by the network side, if the received signal is in one DFT bandwidth notified by the network side, carrying out IDFT on the received signal according to the DFT bandwidth; and if the received signal occupies a plurality of DFT bandwidths notified by the network side, performing IDFT on the received signal according to each DFT bandwidth.

In implementation, when determining whether to perform IDFT on a signal according to DFT bandwidth division notified by the network side, the IDFT is determined according to a predefined rule or according to notification by the network side.

the network side dynamically informs the UE of a DFT bandwidth split.

An embodiment of the present invention provides a base station, including:

after informing the UE of DFT bandwidth division required when IDFT is carried out on the signals, when the signals are sent to the UE, DFT conversion is carried out on the sent signals according to the informed DFT bandwidth division, or DFT conversion is carried out on the sent signals according to one DFT bandwidth when the UE is determined not to carry out DFT conversion on the sent signals according to the DFT bandwidth division informed by the network side;

In the implementation, when DFT conversion is carried out on the transmission signal according to the notified DFT bandwidth division, if the transmission signal is in one notified DFT bandwidth, DFT is carried out on the signal according to the DFT bandwidth; and if the transmitted signals occupy the plurality of notified DFT bandwidths, performing DFT on the transmitted signals according to the DFT bandwidths respectively.

In an implementation, the method further comprises the following steps:

and informing the UE whether to perform IDFT on the transmission signal according to the informed DFT bandwidth division.

In the implementation process, the first step of the method,

the network side informs the UE of the DFT bandwidth division required when IDFT is carried out on the signal according to one of the following modes:

the network side dynamically informs the UE of a DFT bandwidth split.

An embodiment of the present invention provides a signal processing apparatus, including:

the receiving module is used for receiving DFT bandwidth division notified by a network side;

and the IDFT module is used for carrying out IDFT on the received signal according to the DFT bandwidth division notified by the network side, or carrying out IDFT on the received signal according to one DFT bandwidth when the IDFT is not carried out on the received signal according to the DFT bandwidth division notified by the network side.

the notification module is used for notifying the UE of DFT bandwidth division required when IDFT is carried out on the signal;

and the DFT module is used for carrying out DFT conversion on the transmission signal according to the notified DFT bandwidth division when the signal is transmitted to the UE, or carrying out DFT on the transmission signal according to one DFT bandwidth when the UE is determined not to carry out DFT conversion on the transmission signal according to the DFT bandwidth division notified by the network side.

An embodiment of the present invention provides a computer-readable storage medium storing a computer program for executing the signal processing method.

The invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, a network side can inform UE of DFT bandwidth division required when IDFT is carried out on signals; then, the network side carries out DFT conversion on the signals according to the notified DFT bandwidth division; and the UE performs IDFT on the signals according to DFT bandwidth division informed by the network side. Since DFT/IDFT can be performed according to DFT bandwidth division, even when each UE has different downlink reception bandwidth capabilities, DFT/IDFT conversion can be performed for each UE in several or one DFT bandwidths according to its own bandwidth, so that downlink signals of UEs with different downlink bandwidth capabilities can be multiplexed on the same symbol and respective downlink signals can be correctly received. Therefore, by adopting the technical scheme provided by the embodiment of the invention, the downlink channels of the UE with different downlink receiving bandwidth capabilities can still be subjected to frequency division multiplexing on the same symbol on the premise of adopting the DFT-s-OFDM waveform.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a diagram illustrating a transmission process of a downstream DFT-S-OFDM waveform in the background art;

fig. 2 is a schematic diagram of bandwidths of PDSCHs 1 and 2 allocated to UEs 1 and 2 according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of a signal processing method implemented by a UE side according to an embodiment of the present invention;

fig. 4 is a schematic flow chart illustrating an implementation of a signal processing method on a network side according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a location of a downlink BWP configured for each UE in a carrier bandwidth according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating DFT bandwidth division notified to each UE by a network side according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating a UE performing DFT according to DFT bandwidth division in an embodiment of the present invention;

FIG. 8 is a schematic diagram of DFT performed at each DFT bandwidth division in an embodiment of the present invention;

FIG. 9 is a schematic diagram of a UE according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a base station structure according to an embodiment of the present invention.

Detailed Description

The inventor notices in the process of invention that:

the benefit of using the DFT-s-OFDM waveform in the downlink is that PAPR can be minimized. In order to minimize PAPR, it is appropriate to use a uniform DFT transform downstream.

However, if different UEs have different downlink receiving bandwidth capabilities and the signals are multiplexed on the same symbol, the transmitting end cannot still use only one DFT transform.

Fig. 2 is a schematic diagram of bandwidths of PDSCH1 and PDSCH2 allocated to UE1 and UE 2. For example, UE1 supports 100MHz bandwidth, UE2 supports 200MHz bandwidth, if UE1 is allocated PDSCH1(Physical Downlink Shared Channel), UE2 is allocated PDSCH2, PDSCH1 and PDSCH2 occupy 200MHz bandwidth with frequency division multiplexing as shown in fig. 2, then the transmitting end cannot perform DFT transform according to 200MHz bandwidth, otherwise PDSCH1 signal is also dispersed in 200MHz bandwidth, and UE1 does not support reception of bandwidth exceeding 100 MHz.

For the above scenario, one solution is to determine DFT bandwidth according to frequency domain resource allocation of PDSCH, that is, for multiple PDSCHs of frequency division multiplexing, DFT transform is performed independently on each PDSCH. Because the sending end can ensure that the frequency domain resource allocation of the PDSCH is within the range of the receiving bandwidth capability of the UE, the DFT bandwidth of the PDSCH is also within the range of the receiving bandwidth capability of the UE. However, the problem with this solution is that: on the same symbol, the number of DFT conversions is equal to the number of downlink channels of frequency division multiplexing, and when the number of the downlink channels is more, the number of the DFT conversions is also more, so that the PAPR can be obviously increased, and the original intention of adopting DFT-s-OFDM waveforms in downlink is violated.

Based on this, the embodiment of the present invention provides a signal processing scheme, which is used for how to perform frequency division multiplexing on the same symbol on the premise that downlink channels of UEs with different downlink receiving bandwidth capabilities adopt DFT-s-OFDM waveforms.

The following describes embodiments of the present invention with reference to the drawings.

In the technical scheme provided by the invention, the network side informs the DFT bandwidth division within the bandwidth range of the UE, and the UE respectively carries out IDFT within each DFT bandwidth according to the informed DFT bandwidth division. When the received signal is in a DFT bandwidth, carrying out IDFT conversion according to the DFT bandwidth where the received signal is located; when the received signal is within a plurality of DFT bandwidths, IDFT conversion is performed according to each DFT bandwidth.

In the description process, the implementation of the UE and the network side will be described separately, and then an example of the implementation of the UE and the network side in cooperation with each other will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented together or separately, and actually, when the UE and the network are implemented separately, the UE and the network solve the problems of the UE and the network, respectively, and when the UE and the network are used in combination, a better technical effect is obtained.

Fig. 3 is a schematic flow chart of an implementation of a signal processing method at a UE side, as shown in the figure, including:

step 301, UE receives DFT bandwidth division notified by a network side;

step 302, the UE performs IDFT on the received signal according to the DFT bandwidth division notified by the network side, or performs IDFT on the received signal according to one DFT bandwidth when it is determined that the IDFT is not performed on the received signal according to the DFT bandwidth division notified by the network side.

Fig. 4 is a schematic flow chart of an implementation of a signal processing method on a network side, as shown in the figure, the method includes:

step 401, the network side informs the UE of the DFT bandwidth division required when performing IDFT on the signal;

step 402, when the network side sends signals to the UE, the network side performs DFT conversion on the sent signals according to the notified DFT bandwidth division, or when the UE is determined not to perform DFT conversion on the sent signals according to the DFT bandwidth division notified by the network side, the network side performs DFT on the sent signals according to one DFT bandwidth.

In the implementation, when the network side carries out DFT conversion on the transmission signals according to the notified DFT bandwidth division, if the transmission signals are in one notified DFT bandwidth, the DFT is carried out on the transmission signals according to the DFT bandwidth; and if the transmitted signals occupy the plurality of notified DFT bandwidths, performing DFT on the transmitted signals according to the DFT bandwidths respectively.

The following is an example.

Fig. 5 is a schematic diagram of a location of a downlink BWP configured for each UE within a carrier bandwidth, and as shown in the figure, it is assumed that a system downlink bandwidth is 400MHz, UE1 supports a downlink 400MHz bandwidth, UE2 supports a downlink 200MHz bandwidth, and UE3 supports a downlink 100MHz bandwidth. Assume that the network side configures a downlink BWP (Bandwidth part) of 264 RBs (corresponding to 400MHz) for the UE1 according to the downlink Bandwidth capability of each UE, the downlink BWP of the UE2 is 132 RBs (corresponding to 200MHz), the downlink BWP of the UE3 is 66 RBs (corresponding to 100MHz), and the positions in the carrier Bandwidth are as shown in fig. 5.

In implementation, the network side informs the terminal of the DFT bandwidth division within the bandwidth range. The bandwidth may be a BWP bandwidth or a system bandwidth configured for the UE on the network side.

The present invention will be described in detail below by taking the example of the DFT bandwidth division in BWP notified to the terminal at the network side.

Fig. 6 is a DFT bandwidth division diagram of each UE notified by the network side, as shown, for example, the BWP of the UE1 is divided into 3 DFT bandwidths, which are 66 RBs, 66 RBs and 132 RBs respectively; the network side informs the UE2 that the BWP is divided into 2 DFT bandwidths, which are 66 RBs respectively; the network side informs the UE3 that there is only one DFT bandwidth of 66 RBs within the BWP, as shown in FIG. 6.

When the network side transmits the downlink physical channel, DFT conversion is carried out according to the DFT bandwidth informed to the UE, and IDFT conversion is carried out by the UE according to the DFT bandwidth informed by the network side. When a downlink physical channel is in a DFT bandwidth, performing DFT/IDFT conversion according to the DFT bandwidth where the downlink physical channel is located; when one downlink physical channel is in a plurality of DFT bandwidths, DFT/IDFT conversion is carried out according to each DFT bandwidth.

Fig. 7 is a schematic diagram of DFT performed by the network side according to DFT bandwidth division, and as shown in the figure, taking PDSCH of UE1 as an example, if PDSCH on symbol n occupies RB #0 to RB #59 in BWP, the network side and the UE perform DFT and IDFT conversion according to DFT bandwidth 1(66 RBs) respectively; if the PDSCH on symbol n + k occupies RB #0 to RB #159 within BWP, the network side and the UE perform DFT and IDFT transforms according to DFT bandwidth 1(66 RBs), DFT bandwidth 2(66 RBs), and DFT bandwidth 3(132 RBs), respectively, as shown in fig. 7.

Fig. 8 is a schematic diagram of DFT performed under each DFT bandwidth division, and after the technical solution provided by the embodiment is adopted, downlink signals of UEs with different downlink bandwidth capabilities may be multiplexed on the same symbol. For example, the network side schedules PDSCH1, PDSCH2 and PDSCH3 for UE1, UE2 and UE3 respectively in the same time slot, as shown in fig. 8, then:

the network side performs 3 DFT on each symbol occupied by the PDSCH in the time slot according to the scheme shown in the figure, and generates a transmission signal.

On the UE side, the UE performs IDFT according to DFT bandwidth division notified by the network side. Specifically, for UE1, its PDSCH1 falls within DFT bandwidth 2 and bandwidth 3 of UE1, thus IDFT is performed according to DFT bandwidth 2(66RB) and bandwidth 3(132RB) of UE1, respectively; for UE2, its PDSCH2 falls within DFT bandwidth 1 and bandwidth 2 of UE2, thus IDFT is performed according to DFT bandwidth 1(66RB) and bandwidth 2(66RB) of UE2, respectively; for UE3, its PDSCH3 falls entirely within UE3 in DFT bandwidth 1, so IDFT is performed in DFT bandwidth 1(66RB) of UE 3.

It can be seen that PDSCH1, PDSCH2, and PDSCH3, UE1, UE2, and UE3 in the frequency domain of DFT2 on the base station side are all IDFT performed according to the same DFT bandwidth assumption as the base station, and thus respective downlink signals can be received correctly.

In implementation, the network side may also notify the terminal of DFT bandwidth division within the system bandwidth range.

Still assume that the downlink carrier bandwidth is 400MHz and 264 RBs, and assume that the network side notifies the terminal to divide the 264 RBs into 3 DFT bandwidths, which are 66 RBs, and 132 RBs respectively (same as DFT bandwidth division of UE1 in the above example). And the UE performs IDFT according to the DFT bandwidth notified by the network side. When a downlink physical channel is in a DFT bandwidth, performing DFT/IDFT conversion according to the DFT bandwidth where the downlink physical channel is located; when one downlink physical channel is in a plurality of DFT bandwidths, DFT/IDFT conversion is carried out according to each DFT bandwidth.

the network side dynamically informs the UE of a DFT bandwidth split.

Specifically, the method comprises the following steps:

no matter the network side informs the terminal of the DFT bandwidth division in the system bandwidth range or the configured BWP, the network side may inform a DFT bandwidth division semi-statically through an RRC (Radio Resource Control) message (including broadcast), that is, the network side informs the UE of a DFT bandwidth division semi-statically; or semi-statically notify a DFT bandwidth partition set, and further dynamically notify a DFT bandwidth partition in the set through DCI (Downlink Control Indicator), that is, after the network side semi-statically notifies the UE of a DFT bandwidth partition set, dynamically notify the UE to select a DFT bandwidth partition in the set; or a DFT bandwidth division is dynamically notified directly through DCI, that is, the network side dynamically notifies the UE of a DFT bandwidth division. The latter two modes are more suitable for downlink data channels.

The following examples are given.

Suppose, for the UE1 in the above embodiment, the network side configures three DFT bandwidth partitions semi-statically, the first one is the same as the above embodiment (i.e., 66 RBs, and 132 RBs); the second is DFT bandwidth divided into two 132 RBs; the third is the DFT bandwidth divided into 264 RBs.

The network side can dynamically select the DFT bandwidth division mode based on the multiplexing condition of the downlink channel of the UE1 and other UEs. For example, if only the PDSCH of UE1 is present in the current symbol, the network side may indicate a third DFT bandwidth division manner; if the current symbol has both PDSCH of UE1 and PDSCH of UE2, a second DFT bandwidth division manner may be indicated; if the current symbol has PDSCH of UE1, UE2, and UE3, the first DFT bandwidth division may be indicated.

In implementation, for the UE side, the UE determines whether to perform IDFT on the signal according to DFT bandwidth division notified by the network side according to a predefined rule or according to notification by the network side.

Correspondingly, for the network side, the method may further include:

and informing the UE whether to perform IDFT on the signal according to the DFT bandwidth division informed by the network side.

Accordingly, in implementation, the UE does not perform DFT conversion on the transmission signal according to the DFT bandwidth division notified by the network side, and the UE determines not to perform DFT conversion on the transmission signal according to the DFT bandwidth division notified by the network side according to a predefined rule or according to the notification by the network side.

Further, in a specific implementation, if the UE determines not to perform IDFT according to the DFT bandwidth partition notified by the network side, the IDFT is performed according to one DFT bandwidth, where the DFT bandwidth is predetermined or notified by the network side.

For example, an example of determining that the DFT bandwidth is not divided according to the predefined rule is notified by the network side is that when the UE determines that there is only one downlink physical channel on the current symbol, the IDFT may be performed according to a DFT bandwidth, which may be predetermined or notified by the network side. When it is determined that there is only one downlink physical channel on the current symbol, all available manners may be adopted, for example, the UE determines that the downlink physical channel occupies all downlink frequency domain resources. Specifically, assume that the network side semi-statically configures three DFT bandwidths for the UE1, as shown in fig. 6. In a certain time slot, the UE1 determines that the PDSCH occupies the entire downlink bandwidth according to the scheduling information, and then performs IDFT on the PDSCH according to one DFT bandwidth instead of performing three IDFT on the PDSCH according to three DFT bandwidths configured on the network side, where the DFT bandwidth may be an agreed bandwidth, for example, a system bandwidth or a PDSCH bandwidth, or may be notified by the network side, for example, in the scheduling information on the network side.

For example, an example of determining the DFT bandwidth division not notified by the network side according to the network side notification is to consider the existence of UEs with different capabilities in the network, and the network side performs a DFT bandwidth division on the system bandwidth range in the manner of the above embodiment, such as the DFT bandwidth division of the UE1 in fig. 6, and notifies the UE by broadcasting. But at a specific moment, the users that may be frequency division multiplexed all support 400MHz bandwidth, then the network side can perform a DFT according to 400MHz bandwidth. At this time, the network side may notify the terminal not to perform IDFT according to the previously notified DFT bandwidth division, but to perform IDFT according to a pre-agreed 400MHz bandwidth, or to perform IDFT according to a DFT bandwidth less than or equal to 400MHz notified by the network side.

Based on the same inventive concept, the embodiment of the present invention further provides a UE, a base station, a signal processing apparatus, and a storage medium, and because the principles of these apparatuses for solving the problems are similar to the signal processing method, the implementation of these apparatuses may refer to the implementation of the method, and repeated details are not repeated.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

Fig. 9 is a schematic structural diagram of a UE, and as shown in the figure, the UE includes:

a processor 900 for reading the program in the memory 920, executing the following processes:

a transceiver 910 for receiving and transmitting data under the control of the processor 900.

the network side dynamically informs the UE of a DFT bandwidth split.

In fig. 9, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 920, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 930 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

Fig. 10 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:

the processor 1000, which is used to read the program in the memory 1020, executes the following processes:

a transceiver 1010 for receiving and transmitting data under the control of the processor 1000.

In an implementation, the method further comprises the following steps:

In the implementation process, the first step of the method,

the network side dynamically informs the UE of a DFT bandwidth split.

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

The embodiment of the invention also provides a signal processing device at the UE side, which comprises:

The embodiment of the invention also provides a signal processing device at a network side, which comprises:

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

The specific implementation can refer to the foregoing signal processing method implementation on the UE side and the network side.

In summary, in the technical solution provided in the embodiment of the present invention, the UE receives the DFT bandwidth division notified by the network side, and performs IDFT according to the DFT bandwidth division notified by the network side.

Further, if the downlink channel received by the UE is within a DFT bandwidth notified by the network side, the UE performs IDFT according to the DFT bandwidth; and if the downlink channel received by the UE spans multiple DFT bandwidths notified by the network side, the UE performs IDFT according to each DFT bandwidth.

The UE determines whether to perform IDFT according to the DFT bandwidth division notified by the network side before performing IDFT according to the DFT bandwidth division notified by the network side, and performs IDFT according to one DFT bandwidth if determining not to perform IDFT according to the DFT bandwidth division notified by the network side.

One DFT bandwidth is either pre-agreed or informed by the network side.

The UE determines whether to perform IDFT according to DFT bandwidth division notified by the network side according to a predefined rule or network side notification.

By adopting the technical scheme provided by the embodiment of the invention, the downlink channels of the UE with different downlink receiving bandwidth capabilities can still be subjected to frequency division multiplexing on the same symbol on the premise of adopting DFT-s-OFDM waveforms.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 flow or flows 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 flow or flows 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 flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A signal processing method, comprising:

user Equipment (UE) receives Discrete Fourier Transform (DFT) bandwidth division notified by a network side;

the UE performs IDFT on the received signal according to the DFT bandwidth division notified by the network side, or performs Inverse Discrete Fourier Transform (IDFT) on the received signal according to one DFT bandwidth when determining that IDFT is not performed on the received signal according to the DFT bandwidth division notified by the network side.

2. The method of claim 1, wherein when the UE performs IDFT on the received signal according to DFT bandwidth division notified from the network side, if the received signal is within one DFT bandwidth notified from the network side, the UE performs IDFT on the received signal according to the DFT bandwidth; if the received signal occupies a plurality of DFT bandwidths notified by the network side, the UE performs IDFT on the received signal according to each DFT bandwidth.

3. The method of claim 1, wherein when the UE performs IDFT on the received signal according to one DFT bandwidth, the one DFT bandwidth is a DFT bandwidth agreed in advance or a DFT bandwidth notified by the network side.

4. The method of claim 1, wherein the UE determines whether to IDFT the signal by DFT bandwidth division informed by the network side according to a predefined rule or according to an announcement of the network side.

5. The method of claim 1, wherein the network side signaled DFT bandwidth partitioning received by the UE is signaled by the network side in one of the following ways:

the network side dynamically informs the UE of a DFT bandwidth split.

6. A signal processing method, comprising:

and when the network side transmits signals to the UE, the network side performs DFT conversion on the transmitted signals according to the notified DFT bandwidth division, or when the UE is determined not to perform DFT conversion on the transmitted signals according to the DFT bandwidth division notified by the network side, the network side performs DFT on the transmitted signals according to one DFT bandwidth.

7. The method of claim 6, wherein when the network side performs DFT conversion on the transmission signal according to the notified DFT bandwidth division, if the transmission signal is within one of the notified DFT bandwidths, the DFT is performed on the signal according to the DFT bandwidth; and if the transmitted signals occupy the plurality of notified DFT bandwidths, performing DFT on the transmitted signals according to the DFT bandwidths respectively.

8. The method of claim 6, further comprising:

9. The method of claim 6, wherein the network side informs the UE of the DFT bandwidth division required when IDFT is performed on the signal in one of the following ways:

the network side dynamically informs the UE of a DFT bandwidth split.

10. The method of claim 6, wherein when the network side DFT the transmission signal according to one DFT bandwidth, the one DFT bandwidth is a DFT bandwidth agreed in advance or a DFT bandwidth notified by the network side.

11. The method of claim 6, wherein the UE does not DFT-transform the transmission signal with the network-side signaled DFT-bandwidth division, and wherein the UE determines not to DFT-transform the transmission signal with the network-side signaled DFT-bandwidth division according to a predefined rule or according to the network-side notification.

12. A user equipment, characterized in that the user equipment comprises:

13. The UE of claim 12, wherein when the UE performs IDFT on the received signal according to the DFT bandwidth division notified from the network side, if the received signal is within one DFT bandwidth notified from the network side, the UE performs IDFT on the received signal according to the DFT bandwidth; and if the received signal occupies a plurality of DFT bandwidths notified by the network side, performing IDFT on the received signal according to each DFT bandwidth.

14. The user equipment of claim 12, wherein when the UE performs IDFT on the received signal according to one DFT bandwidth, the one DFT bandwidth is a DFT bandwidth agreed in advance or a DFT bandwidth notified by the network side.

15. The user equipment of claim 12, wherein in determining whether to IDFT a signal by DFT bandwidth division signaled by a network side, the determination is made according to a predefined rule or according to a notification of the network side.

16. The UE of claim 12, wherein the DFT bandwidth division notified by the UE on the network side is notified by the network side in one of the following ways:

the network side dynamically informs the UE of a DFT bandwidth split.

17. A base station, comprising:

18. The base station of claim 17, wherein in DFT-converting the transmission signal according to the notified DFT bandwidth division, if the transmission signal is within one of the notified DFT bandwidths, DFT is performed on the signal according to the DFT bandwidth; and if the transmitted signals occupy the plurality of notified DFT bandwidths, performing DFT on the transmitted signals according to the DFT bandwidths respectively.

19. The base station of claim 17, further comprising:

20. The base station of claim 17, wherein the network side informs the UE of the DFT bandwidth division required for IDFT of the signal in one of the following ways:

the network side dynamically informs the UE of a DFT bandwidth split.

21. The base station of claim 17, wherein when the network side DFT the transmission signal according to one DFT bandwidth, the one DFT bandwidth is a DFT bandwidth agreed in advance or a DFT bandwidth notified by the network side.

22. The base station of claim 17, wherein the UE does not DFT-transform the transmission signal with the DFT bandwidth division signaled by the network side, and wherein the UE determines not to DFT-transform the transmission signal with the DFT bandwidth division signaled by the network side according to a predefined rule or according to a notification of the network side.

23. A signal processing apparatus, characterized by comprising:

24. A signal processing apparatus, characterized by comprising:

25. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 11.