CN112243271B

CN112243271B - Signal processing method, device and apparatus

Info

Publication number: CN112243271B
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: 2023-11-24
Anticipated expiration: 2039-07-16
Also published as: CN112243271A; WO2021008306A1

Abstract

The invention discloses a signal processing method, equipment and a device, which comprise the following steps: the network side informs the user equipment of the division of the discrete Fourier transform bandwidth required when the discrete Fourier transform is carried out on the signals; when the network side transmits signals to the user equipment, the network side performs discrete Fourier transform on the transmitted signals 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. The invention can realize the downlink channels of the user equipment with different downlink receiving bandwidths and can still carry out frequency division multiplexing on the same symbol on the premise of adopting the discrete Fourier transform to spread the orthogonal frequency division multiplexing waveform.

Description

Signal processing method, device and apparatus

Technical Field

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

Background

A downlink (forward) link in a satellite communication system adopts a DFT-S-OFDM (Discrete-Fourier Transform Spread Orthogonal Frequency Domain Multiplex, discrete fourier transform spread orthogonal frequency division multiplexing) waveform, so that flexibility of time-resource allocation of an OFDM (Orthogonal Frequency Division Multiplex, orthogonal frequency division multiplexing) system can be fully utilized, and at the same time, PAPR (Peak Average Power Ratio, peak-to-average ratio) is reduced.

Fig. 1 is a schematic diagram of a transmission flow of a downlink DFT-S-OFDM waveform, in which FFT is fast fourier transform (Fast Fourier Transform) as shown in fig. 1, modulation symbols are converted by serial-to-parallel conversion, then are transformed to a frequency domain by DFT (Discrete Fourier Transform), and are mapped to corresponding frequency domain positions. Since the transmitting end adopts DFT transformation to make the signal dispersed on the corresponding DFT bandwidth, the receiving end must know the DFT bandwidth and perform corresponding inverse transformation according to the DFT bandwidth, i.e., IDFT/IFFT (Inverse Discrete Fourier Transform/Inverse Fast Fourier Transform ).

If all UEs (User Equipment) have the same downlink bandwidth receiving capability, for example, can support downlink full bandwidth receiving, the transmitting end may use a DFT transformation on a symbol of the downlink, and the DFT bandwidth size may be notified to the 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-transformed according to a unified DFT bandwidth. At the receiving end, all the UE performs inverse transformation according to the unified DFT bandwidth, and then extracts the respective signals for post-processing.

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

However, the prior art has the disadvantages that: when UEs have different downlink reception bandwidth capabilities, when UEs with different capabilities are frequency division multiplexed on the same symbol, the receiving and transmitting processing cannot be performed according to the unified DFT bandwidth. At this time, there is no solution for supporting the frequency division multiplexing of UEs with different capabilities without changing the 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 the received signal is not subjected to IDFT according to the DFT bandwidth division notified by the network side.

In implementation, when the UE performs IDFT on the received signal according to DFT bandwidth division notified by the network side, if the received signal is within one DFT bandwidth notified by 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.

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

In practice, the UE determines according to predefined rules or according to the notification of the network side when determining whether to IDFT the signal according to the DFT bandwidth division notified by the network side.

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

semi-static informing UE of DFT bandwidth division at the network side; or alternatively, the first and second heat exchangers may be,

after a network side semi-statically informs UE of a DFT bandwidth division set, dynamically informing the UE to select one DFT bandwidth division in the set; or alternatively, the first and second heat exchangers may be,

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

the network side informs the UE of DFT bandwidth division required when carrying out IDFT on the signals;

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

In the implementation, when the network side performs DFT conversion on the transmission signal according to the notified DFT bandwidth division, if the transmission signal is in one of the notified DFT bandwidths, performing DFT on the signal according to the DFT bandwidth; and if the transmission signal occupies the plurality of DFT bandwidths, performing DFT on the transmission signal according to each DFT bandwidth.

In practice, further comprising:

and notifying the UE whether to carry out IDFT on the transmission signals according to the DFT bandwidth division notified by the network side.

In practice, 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 division.

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

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 that the DFT conversion on the transmission signal is not performed 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.

The embodiment of the invention provides user equipment, which comprises:

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

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 performing IDFT on the received signal according to one DFT bandwidth when determining that the received signal is not subjected to IDFT according to the DFT bandwidth division notified by the network side;

and 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 DFT bandwidth division notified by a 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; 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 practice, in determining whether to IDFT the signal according to the DFT bandwidth partitioning signaled at the network side, it is determined according to predefined rules or according to the notification at the network side.

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

The embodiment of the invention provides a base station, which comprises:

after informing a UE of DFT bandwidth division required for IDFT of signals, performing DFT conversion on the transmitted signals according to the informed DFT bandwidth division when transmitting the signals to the UE, or performing DFT on the transmitted signals according to one DFT bandwidth when determining that the UE does not perform DFT conversion on the transmitted signals according to the network-side-informed DFT bandwidth division;

In the implementation, when performing DFT conversion on a transmission signal according to the notified DFT bandwidth division, if the transmission signal is within one notified DFT bandwidth, performing DFT on the signal according to the DFT bandwidth; and if the transmission signal occupies the plurality of DFT bandwidths, performing DFT on the transmission signal according to each DFT bandwidth.

In practice, further comprising:

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

In the practice of this invention,

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 division.

The embodiment of the invention provides a signal processing device, which comprises:

the receiving module is used for receiving DFT bandwidth division notified by the 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 received signal is determined not to be subjected to IDFT according to the DFT bandwidth division notified by the network side.

a notification module, configured to notify the UE of DFT bandwidth division required when performing IDFT 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 transmitting the signal to the UE, or carrying out DFT on the transmission signal according to one DFT bandwidth when determining that the UE does not carry out DFT conversion on the transmission signal according to the notified DFT bandwidth division of the network side.

In an embodiment of the present invention, a computer-readable storage medium storing a computer program for executing the above-described signal processing method is provided.

The invention has the following beneficial effects:

in the technical scheme provided by the embodiment of the invention, the network side can inform the UE of DFT bandwidth division required when carrying out IDFT on the 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 the DFT bandwidth division notified by the network side. Since DFT/IDFT can be performed according to DFT bandwidth division, even in the case where each UE has different downlink reception bandwidth capabilities, DFT/IDFT conversion can be performed under several or one DFT bandwidths according to its own bandwidth for each UE, so that downlink signals of UEs of 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 carry out 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 do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic diagram of a transmission flow of a downlink DFT-S-OFDM waveform in the background art;

fig. 2 is a schematic diagram of PDSCH1 and PDSCH2 bandwidths allocated to UE1 and UE2 in an embodiment of the present invention;

fig. 3 is a schematic flow chart of an implementation of a signal processing method at a UE side in an embodiment of the present invention;

fig. 4 is a schematic flow chart of an implementation of a signal processing method at a network side in an embodiment of the present invention;

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

fig. 6 is a schematic diagram of DFT bandwidth division for informing each UE by a network side in an embodiment of the present invention;

fig. 7 is a schematic diagram of DFT performed by a UE according to each DFT bandwidth division in an embodiment of the present invention;

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

fig. 9 is a schematic diagram of a UE structure in 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 inventors noted during the course of the invention that:

The benefit of using DFT-s-OFDM waveforms in the downlink is that the PAPR can be minimized. In order to minimize the PAPR, one appropriate way is to use a unified DFT transform downstream.

However, if different UEs have different downlink reception bandwidths and the signals are multiplexed on the same symbol, the transmitting end cannot still use only one DFT transformation.

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

For the above scenario, one solution is to determine the DFT bandwidth according to the frequency domain resource allocation of PDSCH, i.e., DFT transform is performed independently for each PDSCH for multiple PDSCH of frequency division multiplexing. Since the transmitting end can ensure that the frequency domain resource of the PDSCH is allocated within the receiving bandwidth capability range of the UE, the DFT bandwidth of the PDSCH is also ensured to be within the receiving bandwidth capability range of the UE. However, this solution has problems in that: on the same symbol, the number of DFT conversion 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 conversion is also more, so that the PAPR can be obviously increased, and the original purpose of adopting DFT-s-OFDM waveforms in the downlink is overcome.

Based on this, the embodiment of the invention provides a signal processing scheme, which is used for performing frequency division multiplexing on the same symbol on the premise of adopting DFT-s-OFDM waveforms on downlink channels of UE with different downlink receiving bandwidths.

The following describes specific 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 in the bandwidth range of the UE, and the UE respectively carries out IDFT in each DFT bandwidth according to the notified DFT bandwidth division. When the received signal is in one DFT bandwidth, performing IDFT 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 the respective DFT bandwidths.

In the description process, the description will be made from the implementation of the UE and the network side, and then an example of the implementation of the cooperation between the UE and the network side 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 cooperatively or separately, and in fact, when the UE and the network are implemented separately, they solve the problems of the UE and the network, respectively, and when the two 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 drawing, including:

step 301, the UE receives DFT bandwidth division notified by the 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 determining that the received signal is not IDFT 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 at a network side, and as shown in the drawing, the method includes:

step 401, a network side informs a UE of DFT bandwidth division required when carrying out IDFT on signals;

step 402, when the network side sends a signal to the UE, the network side performs DFT conversion on the sent signal according to the notified DFT bandwidth division, or when the network side determines that the UE does not perform DFT conversion on the sent signal according to the notified DFT bandwidth division, performs DFT on the sent signal according to one DFT bandwidth.

In the implementation, when the network side performs DFT conversion on the transmission signal according to the notified DFT bandwidth division, if the transmission signal is in one of the notified DFT bandwidths, performing DFT on the transmission signal according to the DFT bandwidth; and if the transmission signal occupies the plurality of DFT bandwidths, performing DFT on the transmission signal according to each DFT bandwidth.

The following is an example.

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

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

The present invention will be specifically described with reference to the case where the network side notifies the terminal of DFT bandwidth division in BWP.

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

When the network side sends the downlink physical channel, the network side carries out DFT conversion according to the DFT bandwidth notified to the UE, and the UE carries out IDFT conversion 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 performed according to each DFT bandwidth.

Fig. 7 is a schematic diagram of DFT performed by the network side according to each DFT bandwidth division, as shown in the drawing, taking PDSCH of UE1 as an example, if PDSCH on symbol n occupies RBs #0 to RB #59 in BWP, the network side and UE perform DFT and IDFT transform according to DFT bandwidth 1 (66 RBs), respectively; if the PDSCH on symbol n+k occupies RBs #0 through #159 in 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 conversions on each symbol occupied by the PDSCH of the slot according to the illustrated scheme, and generates a transmission signal.

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

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

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

Still assuming that the downlink carrier bandwidth is 400mhz and 264 RBs, it is assumed that the network side informs the terminal that the terminal is divided into 3 DFT bandwidths among 264 RBs, 66 RBs, and 132 RBs, respectively (as in the DFT bandwidth division of UE1 in the above example). When the network side transmits the downlink physical channel, DFT conversion is carried out according to the DFT bandwidth notified to the UE, and the UE carries out IDFT conversion 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 performed according to each DFT bandwidth.

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

Specific:

whether the network side informs the terminal of DFT bandwidth division within the system bandwidth range or DFT bandwidth division within the configured BWP, the network side may inform the UE of one DFT bandwidth division semi-statically through RRC (radio resource control ) message (including broadcast), i.e., the network side informs the UE of one DFT bandwidth division semi-statically; or semi-static informing a DFT bandwidth division set, further dynamically informing one DFT bandwidth division in the set through DCI (downlink control instruction, downlink Control Indicator), namely dynamically informing the UE to select one DFT bandwidth division in the set after the network side semi-static informing the UE of one DFT bandwidth division set; or directly dynamically informing a DFT bandwidth division through DCI, namely dynamically informing the UE of the DFT bandwidth division at the network side. The latter two modes are more suitable for downlink data channels.

The following examples are illustrative.

Assume that, for UE1 in the above embodiment, the network side semi-statically configures three DFT bandwidth divisions, the first is the same as the above embodiment (i.e., 66 RBs, and 132 RBs); the second is a DFT bandwidth divided into two 132 RBs; the third is a DFT bandwidth divided into one 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 in the current symbol, the network side may indicate the third DFT bandwidth allocation; if the current symbol has the PDSCH of UE1 and the PDSCH of UE2, a second DFT bandwidth allocation may be indicated; if the current symbol has PDSCH of UE1, UE2 and UE3, the first DFT bandwidth allocation may be indicated.

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

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

and informing the UE whether to carry out IDFT on the signals 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 that the DFT conversion on the transmission signal is not performed 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 the implementation, if the UE determines that IDFT is not performed according to the DFT bandwidth division notified by the network side, IDFT is performed according to a DFT bandwidth, where the DFT bandwidth is pre-agreed or notified by the network side.

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

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

Based on the same inventive concept, the embodiments of the present invention further provide a UE, a base station, a signal processing apparatus, and a storage medium, and since the principle of solving the problem of these devices is similar to that of the signal processing method, implementation of these devices may refer to implementation of the method, and repeated descriptions are omitted.

In implementing the technical scheme provided by the embodiment of the invention, the method can be implemented as follows.

Fig. 9 is a schematic structural diagram of a UE, as shown in the drawing, a user equipment includes:

Processor 900, for reading the program in memory 920, performs the following procedures:

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 division.

Wherein in fig. 9, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 900 and various circuits of memory represented by memory 920, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements, i.e., include a transmitter and a receiver, providing 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 an inscribed desired device for a different user device, 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 diagram of a base station, and as shown in the drawing, the base station includes:

processor 1000, for reading the program in memory 1020, performs the following processes:

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

In practice, further comprising:

In the practice of this invention,

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

Wherein in fig. 10, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1000 and various circuits of the memory, represented by the memory 1020, are chained together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described 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 the network side, which comprises:

For convenience of description, the parts of the above apparatus are described as being functionally divided into various modules or units, respectively. Of course, the functions of each module or unit may be implemented in the same piece or pieces of software or hardware when implementing the present invention.

The specific implementation can be realized by the signal processing method of 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 the UE performs IDFT according to the DFT bandwidth division notified by the network side.

Further, if the downlink channel received by the UE is in a DFT bandwidth notified by the network side, the UE performs IDFT according to the DFT bandwidth; 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.

Before performing IDFT according to the DFT bandwidth division notified by the network side, the UE determines whether to perform IDFT according to the DFT bandwidth division notified by the network side, and if it is determined that IDFT is not performed according to the DFT bandwidth division notified by the network side, performs IDFT according to one DFT bandwidth.

One DFT bandwidth is pre-agreed or notified 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 the notification by the network side.

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 carry out frequency division multiplexing on the same symbol on the premise of adopting the DFT-s-OFDM waveform.

It will be appreciated by those skilled in the art that 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, magnetic 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks 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 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 modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A signal processing method, comprising:

user Equipment (UE) receives the DFT bandwidth division notified by the 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 the received signal is not subjected to IDFT according to the DFT bandwidth division notified by the network side;

when the UE performs IDFT on the received signal according to DFT bandwidth division notified by the network side, if the received signal is in one DFT bandwidth notified by 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.

2. The method of claim 1, wherein one DFT bandwidth is a pre-agreed DFT bandwidth or a DFT bandwidth notified by a network side when the UE IDFT a received signal according to the one DFT bandwidth.

3. The method of claim 1, wherein the UE determines according to a predefined rule or according to a notification at the network side in determining whether to IDFT the signal according to a DFT bandwidth partition notified at the network side.

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

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

5. A signal processing method, comprising:

when the network side sends signals to the UE, carrying out DFT conversion on the sent signals according to the notified DFT bandwidth division, or when the UE is determined not to carry out DFT conversion on the sent signals according to the DFT bandwidth division notified by the network side, carrying out DFT on the sent signals according to one DFT bandwidth;

when the network side carries out DFT conversion on the transmitted signal according to the notified DFT bandwidth division, if the transmitted signal is in one of the notified DFT bandwidths, carrying out DFT on the signal according to the DFT bandwidth; and if the transmission signal occupies the plurality of DFT bandwidths, performing DFT on the transmission signal according to each DFT bandwidth.

6. The method as recited in claim 5, further comprising:

7. The method of claim 5, wherein the network side informs the UE of DFT bandwidth partitioning 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 division.

8. The method of claim 5, wherein when the network side performs DFT on the transmission signal according to one DFT bandwidth, the one DFT bandwidth is a pre-agreed DFT bandwidth or a DFT bandwidth notified by the network side.

9. The method of claim 5, wherein the UE does not DFT-convert the transmit signal according to the DFT bandwidth partition notified by the network side, and the UE determines to DFT-convert the transmit signal not according to the DFT bandwidth partition notified by the network side according to a predefined rule or according to the notification by the network side.

10. A user device, characterized in that the user device comprises:

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

when the UE carries out IDFT on the received signals according to DFT bandwidth division notified by a network side, if the received signals are in one DFT bandwidth notified by the network side, carrying out IDFT on the received signals according to the DFT bandwidth; 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.

11. The user equipment of claim 10, wherein when the UE IDFT the received signal according to one DFT bandwidth, the one DFT bandwidth is a pre-agreed DFT bandwidth or a DFT bandwidth notified by a network side.

12. The user equipment of claim 10, wherein in determining whether to IDFT a signal by DFT bandwidth partitioning of network side notifications, is determined according to predefined rules or according to network side notifications.

13. The user equipment of claim 10, wherein the DFT bandwidth partitioning of the network side notification received by the UE is signaled by the network side in one of:

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

14. A base station, comprising:

when performing DFT conversion on a transmission signal according to the notified DFT bandwidth division, if the transmission signal is in one of the notified DFT bandwidths, performing DFT on the signal according to the DFT bandwidth; and if the transmission signal occupies the plurality of DFT bandwidths, performing DFT on the transmission signal according to each DFT bandwidth.

15. The base station of claim 14, further comprising:

16. The base station of claim 14, wherein the network side informs the UE of DFT bandwidth partitioning required in IDFT of the signal in one of the following ways:

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

17. The base station of claim 14, wherein when the network side performs DFT on the transmission signal according to one DFT bandwidth, the one DFT bandwidth is a pre-agreed DFT bandwidth or a DFT bandwidth notified by the network side.

18. The base station of claim 14, wherein the UE does not DFT-convert the transmit signal according to the network-side notified DFT bandwidth partition, and wherein the UE determines to DFT-convert the transmit signal not according to the network-side notified DFT bandwidth partition according to a predefined rule or according to the network-side notified.

19. A signal processing apparatus, comprising:

the IDFT module is used for carrying out IDFT on the received signal according to DFT bandwidth division notified by the network side, or carrying out IDFT on the received signal according to one DFT bandwidth when the received signal is determined not to be subjected to IDFT according to the DFT bandwidth division notified by the network side;

when IDFT is carried out on the received signal according to DFT bandwidth division notified by a network side, if the received signal is in one DFT bandwidth notified by the network side, IDFT is carried out on the received signal according to the DFT bandwidth; 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.

20. A signal processing apparatus, comprising:

the DFT module is used for carrying out DFT conversion on the transmission signal according to the notified DFT bandwidth division when transmitting the signal to the UE, or carrying out DFT on the transmission signal according to one DFT bandwidth when determining that the UE does not carry out DFT conversion on the transmission signal according to the notified DFT bandwidth division of the network side;

21. A computer readable storage medium, characterized in that it stores a computer program for executing the method according to any one of claims 1 to 9 by a processor.