CN113660186B

CN113660186B - Signal generation method, signal receiving method, device and network equipment

Info

Publication number: CN113660186B
Application number: CN202010395680.7A
Authority: CN
Inventors: 王森; 韩双锋; 谢天; 易芝玲
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2023-05-05
Anticipated expiration: 2040-05-12
Also published as: CN113660186A

Abstract

The invention provides a signal generation method, a signal receiving device and network equipment. The method comprises the following steps: acquiring at least one complex value data symbol group of a time domain symbol to be transmitted; each of the complex-valued data symbol groups comprises at least two data symbols; and adding an additional symbol to the target data symbol of each complex-valued data symbol group to obtain a baseband signal to be transmitted corresponding to the time domain symbol. By adopting the method of the invention, only one additional symbol is added in one complex-valued data symbol group on the time domain symbol to be transmitted, for example, the additional symbol can be added for cyclic prefix, compared with each complex-valued symbol, the cost can be reduced, and the aim of improving the demodulation performance of the system can be achieved.

Description

Signal generation method, signal receiving method, device and network equipment

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a signal generating method, a signal receiving device, and a network device.

Background

In the existing wireless communication system, when an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) baseband signal is generated, a Cyclic Prefix (CP) is added before each OFDM symbol to solve the problem of inter-symbol interference (Inter Symbol Interference, ISI) caused by multipath delay.

However, when a cyclic prefix is added before each OFDM symbol, a larger overhead is definitely caused, and given the size of the transmission data packet, the increase of CP overhead will result in an increase of the modulation coding scheme (Modulation and Coding Scheme, MCS) level, and the required demodulation threshold will also be increased due to the increase of MCS level, which results in a decrease of demodulation performance.

Disclosure of Invention

The technical scheme of the invention aims to provide a signal generation method, a signal receiving device and network equipment, which are used for solving the problem of high cost caused by adding a cyclic prefix before each OFDM symbol in the prior art.

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

acquiring at least one complex value data symbol group of a time domain symbol to be transmitted; each complex-valued data symbol group comprises at least two complex-valued symbols;

and adding an additional symbol to the target data symbol of each complex-valued data symbol group to obtain a baseband signal to be transmitted corresponding to the time domain symbol.

Optionally, in the signal generating method, the additional symbol is a cyclic prefix CP or a specific sequence, for preventing inter-signal interference caused by a multipath channel.

Optionally, the signal generating method, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

Optionally, the signal generating method, wherein the method further comprises:

determining the number of symbols included in the complex-valued data symbol group after adding the additional symbol;

in the step of adding additional symbols to the target data symbols of each complex-valued data symbol group, symbols are added to the target data symbols of each complex-valued data symbol group according to the number of symbols.

Optionally, the signal generating method, wherein determining the number of symbols included in the complex-valued data symbol group after adding the additional symbol includes:

determining the number of symbols as a fixed value; or alternatively

Determining the number of symbols according to configuration of downlink control information DCI or radio resource control RRC higher layer signaling; or alternatively

Activating values in a pre-configured set according to a media access control layer control unit (MAC-CE) signaling or DCI signaling, and determining the number of symbols; wherein the preconfigured set is preconfigured by radio resource control, RRC, higher layer signaling.

Optionally, the signal generating method, wherein the method further comprises:

and determining the symbol length of the additional symbol added on the target data symbol of the complex-valued data symbol group according to the preset length value of the additional symbol and the current time slot and/or subframe number transmitted by the complex-valued data symbol group.

Optionally, when the additional symbol is a cyclic prefix CP, determining, according to a preset length value of the additional symbol, a current slot and/or a subframe number of the complex-valued data symbol group transmission, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group, includes: the symbol length is determined using the following formula:

where k represents a frequency domain indication index, l represents a time domain indication index, μ represents a subcarrier spacing configuration,

indicating that when the CP is added to the first OFDM symbol with respect to the subcarrier configuration μ, the length of the added CP, N _NCP For the conventional CP length, N _ECP To extend CP length, ++>

Representing the additional CP length in the normal CP;

wherein ,N_NCP For a first preset length value, N _ECP For a second predetermined length value,

associated with the current slot and/or subframe number.

Optionally, the signal generating method, wherein the method further comprises:

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

determining that the antenna port is p, when the subcarrier is configured as mu, transmitting the first time domain symbol to be transmitted with the time t

Optionally, the signal generating method, wherein when the additional symbol is a cyclic prefix CP, and the additional symbol is generated according to the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

the transmission time t of a system subframe is determined according to the following formula:

wherein l represents a time domain indication index, and μ represents subcarrier spacing configuration;

expressed as: when the system parameter is configured as mu, the starting time of the first time domain symbol; t (T) _c Representing a system sampling time unit; />

Representing the length of the CP added to the first OFDM symbol when the subcarrier is allocated μ in terms of sample points;

wherein ,

the FFT point number is the fast Fourier transform under the reference bandwidth of the system.

Optionally, the signal generating method, wherein when the antenna port is determined to be p and the subcarrier is configured to be μ according to the following formula, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted

/>

wherein ,

wherein ,

when the antenna port p and the subcarrier configuration mu are represented, the value on the resource unit (k, l) is taken; />

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Representing the number of subcarriers in one Resource Block (RB); mu (mu) ₀ A value representing the largest μ among all subcarrier spacing arrangements; Δf represents a subcarrier spacing.

An embodiment of the present invention further provides a signal receiving method, where the method includes:

receiving a baseband signal sent by a sending end;

determining that an additional symbol is added to a target data symbol in at least one complex-valued data symbol group of the baseband signal;

and removing the additional symbols from the target data symbols of the complex-valued data symbol group to obtain time domain symbols of the baseband signal.

Optionally, in the signal receiving method, the additional symbol is a cyclic prefix CP or a specific sequence, for preventing inter-signal interference caused by a multipath channel.

Optionally, the signal receiving method, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

Optionally, the signal receiving method, wherein determining that the target data symbol in the at least one complex-valued data symbol group of the baseband signal adds an additional symbol includes:

Determining the number of symbols included in the complex-valued data symbol group to which the additional symbols are added;

and determining the complex-valued data symbol group added with the additional symbols according to the symbol number.

Optionally, the signal receiving method, wherein the determining the number of symbols included in the complex-valued data symbol group after adding the additional symbol includes:

determining the number of symbols as a fixed value; or alternatively

Optionally, the signal receiving method, wherein the method further includes:

Optionally, in the signal receiving method, when the additional symbol is a cyclic prefix CP, determining, according to a preset length value of the additional symbol, a current slot and/or a subframe number of the complex-valued data symbol group transmission, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group includes: the symbol length is determined using the following formula:

indicating that the subcarrier is configured as mu, when a CP is added to the first OFDM symbol, the length of the added CP, N _NCP For the conventional CP length, N _ECP To extend CP length, ++>

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

Optionally, the signal receiving method, wherein the method further includes:

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, in the signal receiving method, when the additional symbol is a cyclic prefix CP, the number of time domain symbols occupied by the data channel is determined according to

Determining a transmission time t of a system subframe includes:

wherein k represents a frequency domain indication index, l represents a time domain indication index, and μ represents subcarrier spacing configuration;

wherein ,

FFT points at the system reference bandwidth.

Optionally, in the signal receiving method, when the antenna port is determined to be p and the subcarrier is configured to be μ according to the following formula, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Representing the number of subcarriers in one RB; mu (mu) ₀ A value representing the largest μ among all subcarrier spacing arrangements; Δf represents a subcarrier spacing. />

The embodiment of the invention also provides a network device, which comprises a processor, wherein the processor is used for:

The embodiment of the invention also provides a network device, which comprises a transceiver and a processor, wherein:

the transceiver is used for receiving the baseband signal sent by the sending end;

the processor is configured to determine that an additional symbol is added to a target data symbol in at least one complex-valued data symbol group of the baseband signal; and

The embodiment of the invention also provides a signal generating device, wherein the device comprises:

the acquisition module is used for acquiring at least one complex value data symbol group of the time domain symbol to be transmitted; each complex-valued data symbol group comprises at least two complex-valued symbols;

and the first processing module is used for adding an additional symbol to the target data symbol of each complex-valued data symbol group to obtain a baseband signal to be transmitted corresponding to the time domain symbol.

The embodiment of the invention also provides a signal receiving device, wherein the device comprises:

the receiving module is used for acquiring the baseband signal sent by the sending end;

a determining module, configured to determine that an additional symbol is added to a target data symbol in at least one complex-valued data symbol group of the baseband signal;

And the second processing module is used for removing the additional symbols from the target data symbols of the complex-valued data symbol group to obtain the time domain symbols of the baseband signal.

The embodiment of the invention also provides a network device, which comprises: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the signal generating method as claimed in any one of the above or the signal receiving method as claimed in any one of the above.

Embodiments of the present invention also provide a computer-readable storage medium, wherein the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the signal generating method as set forth in any one of the above, or implements the steps of the signal receiving method as set forth in any one of the above.

At least one of the above technical solutions of the invention has the following beneficial effects:

according to the method provided by the embodiment of the invention, only one additional symbol is added in one complex-valued data symbol group on the time domain symbol to be transmitted, for example, the additional symbol can be added for a cyclic prefix, and compared with each complex-valued data symbol, the overhead can be reduced, and the aim of improving the demodulation performance of the system is fulfilled.

Drawings

Fig. 1 is a diagram showing a main procedure of a normal uplink data channel transmission;

fig. 2 is a main process of a normal downlink data channel transmission;

FIG. 3 is a flow chart of a signal generating method according to an embodiment of the invention;

fig. 4 is a schematic diagram of a timeslot structure according to the method of the embodiment of the present invention;

fig. 5 is a schematic flow chart of a signal receiving method according to an embodiment of the invention;

fig. 6 is a schematic structural diagram of a network device according to a first embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network device according to a second embodiment of the present invention;

FIG. 8 is a schematic diagram of a signal generating device according to an embodiment of the invention;

fig. 9 is a schematic structural diagram of a signal receiving apparatus according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a network device according to a third embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network device according to a fourth embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In order to solve the problem of high overhead caused by adding a cyclic prefix before each OFDM symbol in the prior art, the embodiment of the invention provides a signal generation method.

As shown in fig. 1, the main procedure of uplink data channel transmission generally includes: channel coding, scrambling, modulation, layer mapping, transform precoding, resource mapping, and adding a cyclic prefix CP to an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) signal; as shown in fig. 2, the main procedure of downlink data channel transmission includes: channel coding, scrambling, modulation, layer mapping, precoding, resource mapping, and adding a cyclic prefix CP to an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) signal.

Therefore, when the OFDM baseband signal used in the communication system of the conventional technology is generated, a cyclic prefix is added before the OFDM symbol, so as to solve the problem of inter-symbol interference generated due to multipath delay.

It should be noted that, besides the method that the cyclic prefix CP can be added before the OFDM symbol, or the method that a specific sequence is added can also be used to solve the problem of inter-symbol interference generated due to multipath delay, the signal generating method in the embodiment of the present invention is not limited to the method that can only be applied to OFDM baseband signal generation.

As shown in fig. 3, one implementation manner of the signal generating method according to the embodiment of the present invention includes:

S310, obtaining at least one complex value data symbol group of a time domain symbol to be transmitted; each complex-valued data symbol group comprises at least two complex-valued symbols;

and S320, adding an additional symbol to the target data symbol of each complex-valued data symbol group to obtain a baseband signal to be transmitted corresponding to the time domain symbol.

In the embodiment of the present invention, optionally, the additional symbol is a cyclic prefix CP or a specific sequence, which is used for preventing signal interference caused by a multipath channel.

Optionally, the target data symbol to which the additional symbol is added is the first data symbol or the last data symbol of the complex-valued data symbol group.

In the embodiment of the present invention, optionally, an additional symbol is added to the first data symbol or the last data symbol of each complex-valued data symbol group, where a complex-valued data symbol group may include one or more complex-valued data symbol blocks, and a complex-valued data symbol block may include one or more complex-valued symbols.

It should be noted that, in the embodiment of the present invention, the additional symbol is added to the target data symbol, which means that the additional symbol is added to the target data symbol. Optionally, the method further comprises:

in the step S320, in the step of adding an additional symbol to the target data symbol of each complex-valued data symbol group, a symbol is added to the target data symbol of each complex-valued data symbol group according to the number of symbols.

Optionally, the determining the number of symbols included in the complex-valued data symbol group after adding the additional symbol includes:

determining the number of symbols as a fixed value; or alternatively

Determining the number of symbols according to configuration of downlink control information (Downlink Control Information, DCI) or radio resource control (Radio Resource Control, RRC) higher layer signaling; or alternatively

Determining the number of symbols according to the value in a pre-configured set activated by a media access Control layer Control unit (Media Access Control-Control Element, MAC-CE) signaling or DCI signaling; wherein the preconfigured set is preconfigured by radio resource control, RRC, higher layer signaling.

According to the above, the number of symbols of the complex-valued data symbol group to which the additional symbol is added may be a fixed value, or may be configured according to DCI signaling or RRC signaling, or may be determined by activating a value in a preconfigured set by MAC-CE signaling or DCI signaling.

In the embodiment of the invention, when the symbol number of the complex-valued data symbol group added with the additional symbol is configured by DCI signaling or RRC signaling, the specific symbol number length is related to the total complex-valued symbol number in the complex-valued data symbol group and the number of subcarriers occupied by a data channel.

For example, the total number of complex-valued symbols in the complex-valued data symbol group and the number of subcarriers occupied by the data channel may be determined according to channel conditions/characteristics (multipath delay, doppler shift, etc.), transmission delay requirements, etc., and then the number of symbols included in the complex-valued data symbol group to which additional symbols are added may be determined according to the determined total number of complex-valued symbols in the complex-valued data symbol group and the number of subcarriers occupied by the data channel.

Further optionally, in the embodiment of the present invention, the length of the additional symbol added in each complex-valued data symbol group may be related to the time slot and the subframe number.

Therefore, the signal generating method according to the embodiment of the present invention further includes:

In the embodiment of the present invention, optionally, when the additional symbol is a cyclic prefix CP, determining, according to a preset length value of the additional symbol, a current slot and/or a subframe number of the complex-valued data symbol group transmission, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group includes: the symbol length is determined using the following equation (one):

indicating that the subcarrier is configured as mu, when a CP is added to the first OFDM symbol, the length of the added CP, N _NCP For the conventional CP length, N _ECP In order to extend the length of the CP,/>

representing the additional CP length in the normal CP; />

associated with the current slot and/or subframe number.

Note that, the normal CP length N _NCP And extended CP length N _ECP Usually a fixed value, i.e. a first preset length value and a second preset length value, respectively, for example: n (N) _NCP ＝144，N _ECP Additional CP length in normal cp=512

In relation to slot or subframe numbers, for example: assume that the complex-valued data symbol group to which CP is added contains +.>

The symbols are as follows

The time slots or symbols are periods, in one period, the first +.>

Front +.>

Additional CP length of regular CP of individual symbols +.>

Other by->

Additional CP length for normal CP of complex-valued data symbol group of individual symbols/>

A schematic diagram thereof is shown in fig. 4.

Alternatively, in equation (one), the normal CP length N _NCP Extended CP length N _ECP Additional CP length from normal CP

The specific value of (2) is related to the system basic subcarrier spacing configuration mu.

For example, when the system basic subcarrier spacing is 15kHz, N _NCP ＝144，

N _ECP =512 or 0. When the system basic subcarrier spacing is 17.5kHz, N _NCP ＝192，/>

N _ECP =512 or 0.

On the basis of determining the number of symbols included in the complex-valued data symbol group after the additional symbol is added and the symbol length of the added additional symbol in the above manner, the signal generating method according to the embodiment of the present invention further includes:

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, the number of time domain symbols occupied by the data channel

Representing the number of time domain symbols occupied by a complex-valued data symbol group in the uplink data channel or the downlink data channel.

Optionally, in the above step, when the additional symbol is a cyclic prefix CP, the number of time domain symbols occupied by the data channel is determined

Determining a transmission time t of a system subframe includes:

the transmission time t of one system subframe is determined according to the following formula (two):

wherein ,

for the number of fast fourier transform (Fast Fourier Transform, FFT) points at the system reference bandwidth, k represents the frequency domain indication index, e.g +.>

In the embodiment of the present invention, optionally, when the antenna port is determined to be p and the subcarrier is configured to be μ according to the following formula (three), the time domain symbol to be transmitted with the transmission time t is transmitted

wherein ,

wherein ,

Representing a starting position of a resource grid; / >

Representing the size of the resource grid; />

According to the above manner, when the cyclic prefix CP added to the target data symbol of each complex-valued data symbol group is a fixed value, or related to a slot number, or related to a subframe number, after the cyclic prefix CP is added by the above formula (two) and the formula (three), the baseband signal to be transmitted corresponding to the time domain symbol to be transmitted can be obtained.

The method for transmitting signals according to the embodiment of the present invention is described above by taking adding a cyclic prefix CP to a complex-valued data symbol group as an example, and the specific manner of adding a cyclic prefix CP to a complex-valued data symbol group is described, but the specific manner of adding a specific sequence to a complex-valued data symbol group may be according to the above principle and will not be described in detail herein.

The signal sending method according to the embodiment of the present invention further includes, after obtaining the baseband signal to be sent corresponding to the time domain symbol in the above manner:

and transmitting the baseband signal to be transmitted.

In the embodiment of the present invention, the transmitting end of the baseband signal to be transmitted may be one of a base station and a terminal, and the receiving end of the baseband signal to be transmitted is the other one of the base station and the terminal.

Compared with the prior art, the signal generation method of the embodiment of the invention does not require adding the CP to each OFDM symbol, but reduces the CP overhead by adding only one CP to a plurality of complex-valued symbols, thereby achieving the effect of improving the demodulation performance of the system.

Another embodiment of the present invention further provides a signal receiving method, as shown in fig. 5, where the method includes:

s510, receiving a baseband signal sent by a sending end;

s520, determining that an additional symbol is added to a target data symbol in at least one complex-valued data symbol group of the baseband signal;

and S530, removing the additional symbols from the target data symbols of the complex-valued data symbol group to obtain time domain symbols of the baseband signal.

By adopting the method of the embodiment of the invention, only one additional symbol is added in one complex-valued data symbol group on the received baseband signal, for example, the additional symbol can be added for a cyclic prefix, and compared with each complex-valued symbol, the overhead can be reduced, and the aim of improving the demodulation performance of the system can be achieved.

Optionally, in the signal receiving method, in step S520, the determining that the target data symbol in the at least one complex-valued data symbol group of the baseband signal adds an additional symbol includes:

determining the number of symbols as a fixed value; or alternatively

Optionally, the signal receiving method, wherein the method further includes:

indicating that the subcarrier is configured as mu, when the CP is added to the first OFDM symbol, the length of the added CP, N _NCP For the conventional CP length, N _ECP To extend CP length, ++>

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

Optionally, the signal receiving method, wherein the method further includes:

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

when the antenna port is determined to be p and the subcarrier is configured to be mu, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted

Determining a transmission time t of a system subframe includes:

/>

wherein ,

for FFT points at the system reference bandwidth, k represents the frequency domain indication index.

Optionally, in the signal receiving method, when the antenna port is determined to be p and the subcarrier is configured to be μ according to the following formula, the first time domain symbol to be transmitted with the transmission time t

wherein ,

wherein ,

representing antenna portsp and subcarrier configuration μ, the value on the resource unit (k, l); />

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Representing the number of subcarriers in one RB; mu (mu) ₀ A value representing the largest μ among all subcarrier spacing arrangements; Δf represents a subcarrier spacing.

One embodiment of the present invention further provides a network device, as shown in fig. 6, including a processor 610, where the processor 610 is configured to:

In the embodiment of the present invention, the network device is one of a base station and a terminal.

Optionally, the network device, wherein the additional symbol is a cyclic prefix CP or a specific sequence, for preventing inter-signal interference caused by a multipath channel.

Optionally, the network device, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

Optionally, the network device, wherein the processor 610 is further configured to:

Optionally, the network device, wherein the processor 610 determines a symbol number of symbols included in the complex-valued data symbol group after adding the additional symbol, including:

determining the number of symbols as a fixed value; or alternatively

Optionally, when the additional symbol is a cyclic prefix CP, the determining, by the processor 610, the symbol length of the cyclic prefix added to the target data symbol of the complex-valued data symbol group according to the preset length value of the additional symbol, the current slot and/or subframe number of the complex-valued data symbol group transmission includes: the symbol length is determined using the following formula:

indicating that the subcarrier is configured as mu, in the firstWhen one OFDM symbol is added with CP, the length of the added CP, N _NCP For the conventional CP length, N _ECP To extend CP length, ++>

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, the network device, wherein when the additional symbol is a cyclic prefix CP, the processor 610 is configured to determine the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

wherein ,

for fast fourier transform FFT points at the system reference bandwidth, k represents the frequency domain indication index.

Optionally, the network device, wherein the processor 610 determines that the antenna port is p, and when the subcarrier is configured to μ, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted according to the following formula

/>

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

One embodiment of the present invention further provides a network device, as shown in fig. 7, including a transceiver 710 and a processor 720, wherein:

the transceiver 710 is configured to receive a baseband signal sent by a transmitting end;

the processor 720 is configured to determine that an additional symbol is added to a target data symbol in at least one complex-valued data symbol group of the baseband signal; and

Optionally, the network device, wherein the processor 720 determines that the target data symbol in the at least one complex-valued data symbol group of the baseband signal adds an additional symbol, including:

Optionally, the network device, wherein the processor 720 determines a symbol number of the symbols included in the complex-valued data symbol group after adding the additional symbol, including:

determining the number of symbols as a fixed value; or alternatively

Optionally, the network device, wherein the processor 720 is further configured to:

Optionally, when the additional symbol is a cyclic prefix CP, the processor 720 determines, according to a preset length value of the additional symbol, a current slot and/or subframe number of the complex-valued data symbol group transmission, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group, where the determining includes: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, the network device, wherein when the additional symbol is a cyclic prefix CP, the processor 720 determines the number of time domain symbols occupied by the data channel according to the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

wherein ,

Optionally, the network device, wherein the processor 720 determines that the antenna port is p, and when the subcarrier is configured to μ, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted according to the following formula

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Representing the number of subcarriers in one RB; mu (mu) ₀ Expressed in all childrenThe maximum mu value in the carrier interval configuration; Δf represents a subcarrier spacing.

The embodiment of the invention also provides a signal generating device, as shown in fig. 8, which comprises:

an obtaining module 810, configured to obtain at least one complex-valued data symbol group of a time-domain symbol to be transmitted; each complex-valued data symbol group comprises at least two complex-valued symbols;

a first processing module 820, configured to add an additional symbol to the target data symbol of each complex-valued data symbol group, so as to obtain a baseband signal to be sent corresponding to the time domain symbol. Optionally, the signal generating device, wherein the additional symbol is a cyclic prefix CP or a specific sequence, for preventing inter-signal interference caused by a multipath channel.

Optionally, the signal generating device, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

Optionally, the signal generating device, wherein the first processing module 820 is further configured to:

Optionally, the signal generating apparatus, wherein the first processing module 820 determines the number of symbols included in the complex-valued data symbol group after adding the additional symbol, includes:

determining the number of symbols as a fixed value; or alternatively

Optionally, when the additional symbol is a cyclic prefix CP, the first processing module 820 determines, according to a preset length value of the additional symbol, a current slot and/or a subframe number of the complex-valued data symbol group transmission, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group, where the determining includes: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe; />

Optionally, when the additional symbol is a cyclic prefix CP, the first processing module 820 performs the processing according to the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

wherein ,

is a systemFast fourier transform FFT points at the reference bandwidth, k represents the frequency domain indication index.

Optionally, in the signal generating apparatus, the first processing module 820 determines that the antenna port is p according to the following formula, and when the subcarrier is configured as μ, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

The embodiment of the invention also provides another signal receiving device, as shown in fig. 9, where the device includes:

a receiving module 910, configured to obtain a baseband signal sent by a sending end;

a determining module 920, configured to determine that an additional symbol is added to a target data symbol in at least one complex-valued data symbol group of the baseband signal;

a second processing module 930, configured to perform a process of removing the additional symbol on the target data symbol of the complex-valued data symbol group, to obtain a time domain symbol of the baseband signal.

Optionally, the signal receiving apparatus further includes a cyclic prefix CP or a specific sequence, where the additional symbol is used to prevent inter-signal interference caused by a multipath channel.

Optionally, the signal receiving apparatus, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

Optionally, the signal receiving apparatus, wherein the determining module 920 determines that the target data symbol in the at least one complex-valued data symbol group of the baseband signal adds an additional symbol, includes:

Optionally, the signal receiving apparatus, wherein the determining module 920 determines the number of symbols included in the complex-valued data symbol group after adding the additional symbol, includes:

determining the number of symbols as a fixed value; or alternatively

Optionally, the signal receiving apparatus, wherein the determining module 920 is further configured to:

Optionally, when the additional symbol is a cyclic prefix CP, the determining module 920 determines, according to a preset length value of the additional symbol, a current slot and/or subframe number of the transmission of the complex-valued data symbol group, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group, where the determining includes: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, in the signal receiving apparatus, when the additional symbol is a cyclic prefix CP, the determining module 920 determines the number of time domain symbols occupied by the data channel according to the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

wherein ,

Optionally, in the signal receiving apparatus, the determining module 920 determines that the antenna port is p according to the following formula, and when the subcarrier is configured as μ, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Another aspect of the embodiments of the present invention further provides a network device, which may alternatively be one of a base station and a terminal, as shown in fig. 10, including: a processor 1001; and a memory 1003 connected to the processor 1001 through a bus interface 1002, the memory 1003 storing programs and data used by the processor 1001 when performing operations, the processor 1001 calling and executing the programs and data stored in the memory 1003.

The transceiver 1004 is connected to the bus interface 1002, and is configured to receive and transmit data under the control of the processor 1001, and specifically, the processor 1001 is configured to read a program in the memory 1003, and execute the following procedures:

Optionally, the network device, wherein the processor 1001 is further configured to:

Optionally, the network device, wherein the processor 1001 determines the number of symbols included in the complex-valued data symbol group after adding the additional symbol, includes:

determining the number of symbols as a fixed value; or alternatively

Optionally, when the additional symbol is a cyclic prefix CP, the processor 1001 determines, according to a preset length value of the additional symbol, a current slot and/or subframe number of the complex-valued data symbol group transmission, a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group, where the determining includes: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, the network device, wherein when the additional symbol is a cyclic prefix CP, the processor 1001 is configured to determine the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

wherein ,

Optionally, the network device, wherein the processor 1001 determines that the antenna port is p, and when the subcarrier is configured to μ, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted according to the following formula

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Where in FIG. 10, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1001 and various circuits of the memory represented by the memory 1003, 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 1004 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 processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1003 may store data used by the processor 1001 in performing operations.

Another aspect of the embodiments of the present invention further provides a network device, which may alternatively be one of a base station and a terminal, as shown in fig. 11, including: a processor 1101; and a memory 1103 connected to the processor 1101 through a bus interface 1102, the memory 1103 being configured to store programs and data used by the processor 1101 when executing operations, the processor 1101 calling and executing the programs and data stored in the memory 1103.

The transceiver 1104 is connected to the bus interface 1102, and is used for receiving and transmitting data under the control of the processor 1101, specifically, the processor 1101 is used for reading a program in the memory 1103, and performing the following procedures:

receiving a baseband signal sent by a sending end;

Optionally, the network device, wherein the processor 1101 determines that the target data symbol in the at least one complex-valued data symbol group of the baseband signal adds an additional symbol, including:

Optionally, the network device, wherein the processor 1101 determines a number of symbols included in the complex-valued data symbol group after adding the additional symbol, includes:

determining the number of symbols as a fixed value; or alternatively

Optionally, the network device, wherein the processor 1101 is further configured to:

Optionally, when the additional symbol is a cyclic prefix CP, the processor 1101 determines a symbol length of a cyclic prefix added to a target data symbol of the complex-valued data symbol group according to a preset length value of the additional symbol, a current slot and/or a subframe number of the complex-valued data symbol group transmission, including: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

Optionally, the network device, wherein when the additional symbol is a cyclic prefix CP, the processor 1101 is configured to determine the number of time domain symbols occupied by the data channel

Determining a transmission time t of a system subframe includes:

expressed as: when the system parameter is configured as mu, the starting time of the first time domain symbol; t (T) _c Representing system samplesA time unit; />

wherein ,

Optionally, the network device, wherein the processor 1101 determines that the antenna port is p according to the following formula, and when the subcarrier is configured as μ, the time domain symbol to be transmitted with the transmission time t is the first time domain symbol to be transmitted

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

Representing the number of subcarriers in one RB; mu (mu) ₀ Represents the maximum μ in all subcarrier spacing configurationsTaking a value; Δf represents a subcarrier spacing.

Where in FIG. 11, a bus architecture may comprise any number of interconnected buses and bridges, with various circuits of the one or more processors, as represented by processor 1101, and the memory, as represented by memory 1103, being 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 1104 may be a plurality of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing the operations.

In addition, a specific embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the steps of the signal generating method as set forth in any one of the above, or implements the steps of the signal receiving method as set forth in any one of the above.

Specifically, the computer readable storage medium is applied to the above network device, and when applied to the network device, the corresponding signal generating method or the signal receiving method performs the steps as described in detail above, which will not be described herein.

In the several embodiments provided in this application, it should be understood that the disclosed methods and apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may be physically included separately, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.

The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and such modifications and changes should also be considered as being within the scope of the present invention.

Claims

1. A method of signal generation, the method comprising:

acquiring at least one complex value data symbol group of a time domain symbol to be transmitted; each of the complex-valued data symbol groups comprises at least two data symbols;

Adding additional symbols on the target data symbols of each complex-valued data symbol group to obtain baseband signals to be transmitted corresponding to the time domain symbols;

wherein the method further comprises:

wherein in the step of adding an additional symbol to the target data symbol of each complex-valued data symbol group, a symbol is added to the target data symbol of each complex-valued data symbol group according to the number of symbols;

the determining the number of symbols included in the complex-valued data symbol group after adding the additional symbol includes:

determining the number of symbols as a fixed value; or alternatively

2. The signal generating method as claimed in claim 1, wherein the additional symbol is a cyclic prefix CP or a specific sequence for preventing inter-signal interference caused by a multipath channel.

3. The signal generating method according to claim 1, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

4. A signal producing method according to any one of claims 1 to 3, further comprising:

5. The signal generating method according to claim 4, wherein when the additional symbol is a cyclic prefix CP, determining the symbol length of the cyclic prefix added to the target data symbol of the complex-valued data symbol group according to the preset length value of the additional symbol, the current slot and/or subframe number of the complex-valued data symbol group transmission, includes: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

6. A signal producing method according to any one of claims 1 to 3, further comprising:

according to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe; />

7. The signal generating method as claimed in claim 6, wherein when the additional symbol is a cyclic prefix CP, the number of time domain symbols occupied by the data channel is determined

Determining a transmission time t of a system subframe includes:

wherein ,

8. The signal generating method according to claim 7, wherein when the antenna port is determined to be p and the subcarrier spacing is configured to be μ, the first to be transmitted with a transmission time t is determined according to the following formulaIs of the time domain symbol of (1)

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

9. A method of signal reception, the method comprising:

receiving a baseband signal sent by a sending end;

the target data symbols of the complex-valued data symbol group are subjected to the process of removing the additional symbols, so that time domain symbols of the baseband signal are obtained;

wherein said determining the target data symbol in the at least one complex-valued data symbol group of the baseband signal adds an additional symbol comprises:

determining the complex-valued data symbol group to which the additional symbol is added according to the symbol number;

determining the number of symbols as a fixed value; or alternatively

10. The signal receiving method of claim 9, wherein the additional symbol is a cyclic prefix CP or a specific sequence for preventing inter-signal interference caused by a multipath channel.

11. The signal receiving method of claim 9, wherein the target data symbol is a first data symbol or a last data symbol of the complex-valued data symbol group.

12. The signal receiving method according to any one of claims 9 to 11, characterized in that the method further comprises:

13. The signal receiving method according to claim 12, wherein when the additional symbol is a cyclic prefix CP, determining the symbol length of the cyclic prefix added to the target data symbol of the complex-valued data symbol group according to the preset length value of the additional symbol, the current slot and/or subframe number of the complex-valued data symbol group transmission, includes: the symbol length is determined using the following formula:

Representing the additional CP length in the normal CP;

associated with the current slot and/or subframe number.

14. The signal receiving method according to any one of claims 9 to 11, characterized in that the method further comprises:

According to the number of time domain symbols occupied by the data channel

Determining the transmission time t of a system subframe;

determination ofWhen the antenna port is p and the subcarrier is configured as mu, the time domain symbol to be transmitted is transmitted with the transmission time t

15. The signal receiving method of claim 14, wherein when the additional symbol is a cyclic prefix CP, the number of time domain symbols occupied by the data channel is determined

Determining a transmission time t of a system subframe includes:

wherein ,

FFT points at the system reference bandwidth.

16. The signal receiving method of claim 15, wherein the time domain symbol to be transmitted of the first time of transmission t when the antenna port is determined to be p and the subcarrier spacing is configured to be μ is determined according to the following formula

/>

wherein ,

wherein ,

Representing a starting position of a resource grid; />

Representing the size of the resource grid; />

17. A network device comprising a processor, the processor configured to:

wherein the processor is further configured to:

the processor determining a number of symbols included in the complex-valued data symbol group after adding an additional symbol, comprising:

Determining the number of symbols as a fixed value; or alternatively

18. A network device comprising a transceiver and a processor, characterized by:

wherein the processor determines that a target data symbol in at least one complex-valued data symbol group of the baseband signal has an additional symbol added thereto, comprising:

The processor determining a number of symbols included in the complex-valued data symbol group after adding the additional symbol, comprising:

determining the number of symbols as a fixed value; or alternatively

19. A signal generating apparatus, the apparatus comprising:

the first processing module is used for adding an additional symbol to the target data symbol of each complex-valued data symbol group to obtain a baseband signal to be transmitted corresponding to the time domain symbol;

wherein the first processing module is further configured to:

The first processing module determining a number of symbols included in the complex-valued data symbol group after adding an additional symbol, comprising:

determining the number of symbols as a fixed value; or alternatively

20. A signal receiving apparatus, the apparatus comprising:

the second processing module is used for removing the additional symbols from the target data symbols of the complex-valued data symbol group to obtain time domain symbols of the baseband signal;

wherein the determining module determines that the target data symbol in the at least one complex-valued data symbol group of the baseband signal has an additional symbol added thereto, comprises:

the determining module determines a number of symbols included in the complex-valued data symbol group after adding the additional symbol, including:

determining the number of symbols as a fixed value; or alternatively

21. A network device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the signal generating method according to any one of claims 1 to 8 or the signal receiving method according to any one of claims 9 to 16.

22. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the signal generating method according to any one of claims 1 to 8 or the steps of the signal receiving method according to any one of claims 9 to 16.