CN111431640A - Signal transmission method, device and system - Google Patents
Signal transmission method, device and system Download PDFInfo
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- CN111431640A CN111431640A CN202010304745.2A CN202010304745A CN111431640A CN 111431640 A CN111431640 A CN 111431640A CN 202010304745 A CN202010304745 A CN 202010304745A CN 111431640 A CN111431640 A CN 111431640A
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Abstract
The embodiment of the invention discloses a signal transmission method and a device, wherein the method comprises the following steps: the relation between the training sequence distribution information and the channel environment information is set, and the distribution information of the training sequences can change after the channel environment changes, so that the positions and the number of the training sequences inserted into the data can change along with the channel environment. Therefore, when the channel environment meets a certain condition, the number of the training sequences inserted into the data frame can be reduced, so that the resources occupied by the training sequences are reduced, and the transmission efficiency of effective information is improved; and the relation of the distribution information of the leader sequence and the training sequence is set, so that the receiving end can determine the distribution information of the training sequence based on the received front-channel sequence, and the change of the channel environment can be timely and accurately reflected under the condition of not increasing the interaction between the transmitting end and the receiving end.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for transmitting a signal.
Background
The transmission of signals over a wireless channel may cause fading and distortion of the signals due to changes in the channel environment, the channel conditions depend on the location and motion of the terminal, and when the terminal changes location or moves, the changes in the channel conditions may affect the normal demodulation of data.
Therefore, in order to demodulate data accurately, a training sequence is usually added to the data, and the training sequence can characterize the channel condition and assist in demodulating the data.
However, in the conventional method, the positions and the number of the training sequences inserted into the data are not changed, which reduces the transmission of effective information and further occupies more transmission resources.
Disclosure of Invention
In view of this, the embodiment of the present invention discloses a signal transmission method and apparatus, which can reduce the number of training sequences inserted into a data frame when a channel environment meets a certain condition, thereby reducing resources occupied by the training sequences and improving the transmission efficiency of effective information; and the relation of the distribution information of the leader sequence and the training sequence is set, so that the receiving end can determine the distribution information of the training sequence based on the received front-channel sequence, and the change of the channel environment can be timely and accurately reflected under the condition of not increasing the interaction between the transmitting end and the receiving end.
In a first aspect, an embodiment of the present invention discloses a signal transmission method, which is applied to a transmitting end, and includes:
acquiring environment information of a channel;
configuring training sequence distribution information and a leader sequence based on the environment information of the channel;
inserting a training sequence into a data frame according to the training sequence distribution information;
sending the leader sequence to a receiving end; the leader sequence is used for determining the distribution information of the training sequence, and the distribution information of the training sequence is used for a receiving end to obtain the training sequence sent by a transmitting end;
sending the data frame carrying the training sequence to a receiving end; the training sequence is used for determining the environmental information of the channel of the transmitting terminal.
Optionally, the obtaining the environment information of the channel includes:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
Optionally, the configuring training sequence distribution information and preamble sequence based on the environment information of the channel includes:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
The second aspect and the embodiment of the invention disclose a signal transmission method, which is applied to a receiving end and comprises the following steps:
after receiving a leader sequence, determining distribution information of a training sequence based on the leader sequence;
after the receiving end receives the data frame corresponding to the leader sequence, extracting a training sequence from the data frame based on the determined training sequence distribution information;
and determining the environmental information of the current channel based on the extracted training sequence.
Optionally, the determining environmental information of the current channel based on the extracted training sequence includes:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
Optionally, the method further includes:
deleting the training sequence in the data frame to obtain effective data in the data frame.
The third aspect and the embodiment of the invention also disclose a signal transmission method, which is characterized by comprising the following steps:
a transmitting terminal acquires environment information of a channel;
a transmitting terminal configures training sequence distribution information and a leader sequence based on the environment information of a channel;
the transmitting terminal inserts a training sequence into the data frame based on the training sequence distribution information;
the transmitting terminal sends the leader sequence to the receiving terminal;
the transmitting terminal sends the data frame carrying the training sequence to the receiving terminal;
after receiving the leader sequence, the receiving end determines the distribution information of the training sequence based on the leader sequence;
after receiving a data frame sent by a transmitting terminal, a receiving terminal extracts a training sequence from the data frame based on the determined training sequence distribution information;
and the receiving end acquires the environmental information of the current channel based on the extracted training sequence.
Optionally, the acquiring, by the transmitting end, environment information of a channel includes:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
Optionally, the configuring, by the transmitting end, training sequence distribution information and a preamble sequence based on the environment information of the channel includes:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
Optionally, the determining, by the receiving end, the environment information of the current channel based on the extracted training sequence includes:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
Optionally, the method further includes:
and deleting the training sequence in the data frame by the receiving end to obtain the effective data in the data frame.
The embodiment of the invention also discloses a signal transmission system, which comprises:
a transmitting end and a receiving end;
the transmitting end is configured to perform the signal transmission method according to the first aspect;
the receiving end is configured to perform the signal transmission method according to the second aspect.
The embodiment of the invention also discloses an electronic device, which comprises:
a memory and a processor;
wherein the processor is configured to execute a program stored in the memory;
the memory is configured to store a program for executing the signal transmission method according to the first aspect;
or the program is for executing the signal transmission method of the second aspect;
or a program for executing the signal transmission method according to the third aspect.
The embodiment of the invention discloses a signal transmission method and a device, wherein the method comprises the following steps: the relation between the training sequence distribution information and the channel environment information is set, and the distribution information of the training sequences can change after the channel environment changes, so that the positions and the number of the training sequences inserted into the data can change along with the channel environment. Therefore, when the channel environment meets a certain condition, the number of the training sequences inserted into the data frame can be reduced, so that the resources occupied by the training sequences are reduced, and the transmission efficiency of effective information is improved; and the relation of the distribution information of the leader sequence and the training sequence is set, so that the receiving end can determine the distribution information of the training sequence based on the received front-channel sequence, and the change of the channel environment can be timely and accurately reflected under the condition of not increasing the interaction between the transmitting end and the receiving end.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an interaction diagram illustrating a signal transmission method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a signal transmission method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a channel transmission method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a signal transmission apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a signal transmission apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a signal transmission system according to an embodiment of the present invention;
fig. 7 shows a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an interaction diagram of a signal transmission method provided in an embodiment of the present invention is shown, where in the embodiment, the method includes:
it should be noted that the method includes a transmitting end and a receiving end, where the transmitting end may be a terminal MS in data transmission, and the receiving end may be a terminal MS or a base station BS.
S101: a transmitting terminal acquires environment information of a channel;
in this embodiment, the environment information of the channel may characterize the stability of the channel or the fading condition of the channel.
The method for acquiring the environment information of the channel may include:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
The method for transmitting downlink data to the terminal (MS) by the Base Station (BS) includes the following two methods:
in the first mode, in the interaction process of a terminal and a base station, the base station sends downlink data to the terminal;
in the second mode, the base station transmits broadcast information, and the terminal receives the broadcast information transmitted by the base station.
For downlink data in the first mode, the terminal may estimate the environment of the channel based on the downlink data;
for the broadcast information in the second mode, the broadcast information received by the terminal may not be the one transmitted to the terminal by the channel, and the terminal cannot interpret the data, but the terminal may demodulate the received broadcast information and estimate the environment of the channel based on the demodulated data.
The method for estimating the environment of the signal may include multiple methods, which are not limited in this embodiment, and may include: blind estimation, semi-blind estimation, etc.
S102, a transmitting terminal configures training sequence distribution information and a leader sequence based on the environment information of a channel;
in this embodiment, the method for configuring training sequence distribution information based on the environment information of the channel may include the following two methods:
the method comprises the steps that a corresponding relation between environment information of a channel and training sequence distribution information is preset at a transmitting end, and based on the corresponding relation, the distribution information of the training sequence can be determined through the environment information of the channel;
and secondly, analyzing the environment information of the channel, estimating the state of the current channel, and configuring the distribution information of the training sequence based on the state of the current channel.
For example, the state of a channel that meets certain conditions corresponds to the distribution information of a certain training sequence.
In this embodiment, the preamble sequence and the training sequence distribution information have a one-to-one correspondence, and the correspondence between the training sequence distribution information and the preamble sequence may be preset at the transmitting end.
Or setting the corresponding relation between the preamble information represented by the preamble sequence and the training sequence distribution information.
The preamble information may be, for example, the type of preamble sequence.
S103: the transmitting terminal inserts a training sequence into the data frame based on the training sequence distribution information;
in this embodiment, the training sequence distribution information is used to indicate the distribution of the training sequences, and the transmitting end is used to indicate the distribution of the training sequences inserted into the data frame.
In this embodiment, the training sequence distribution information may be used to indicate what kind of training sequence is inserted into the data frame. It can be seen from this that, when the environmental information of the channel is different, the distribution information corresponds to different training sequences, that is, the distribution information corresponds to different training sequences.
The training sequence inserted into the data frame may change as the channel environment changes, for example, the position and number of the training sequence inserted into the data frame may change as the channel environment changes.
For example, when the channel environment is better, fewer training sequences may be inserted, and when the channel environment is worse, more training sequences may be inserted.
S104: the transmitting terminal sends the leader sequence to the receiving terminal;
in this embodiment, the preamble sequence is a series of signals transmitted before the effective signal is transmitted, and the effective signal is transmitted immediately after the preamble signal is transmitted.
In the prior art, the preamble sequence is used to remind the receiving end of sending a valid signal.
In this embodiment, the preamble sequence is distribution information for determining a training sequence, where the distribution information of the training sequence is used by the receiving end to obtain the training sequence sent by the transmitting end.
That is to say, in this embodiment, the preamble sequence may be used to remind the receiving end of sending an effective data signal, or may be used to determine distribution information of the training sequence.
S105: the transmitting terminal sends the data frame carrying the training sequence to the receiving terminal;
s106: after receiving the leader sequence, the receiving end determines the distribution information of the training sequence based on the leader sequence;
in this embodiment, the receiving end sets a corresponding relationship between the preamble sequence and the training sequence distribution information in advance, and thus, after receiving the preamble sequence, the distribution information of the training sequence can be determined based on the corresponding relationship.
As can be seen from the above description, the corresponding relationship between the preamble sequence and the training sequence distribution information may be a direct corresponding relationship or an indirect corresponding relationship.
Wherein, the direct correspondence can be expressed as:
the mapping relation of the leader sequence and the training sequence distribution information is preset at the receiving end.
The indirect correspondence can be expressed as:
and setting the corresponding relation between the preamble information represented by the preamble sequence and the training sequence distribution information.
And determining preamble information by analyzing the preamble sequence, and determining training sequence distribution information corresponding to the received preamble sequence based on the corresponding relation between the preamble information and the training sequence distribution information.
S107: after receiving a data frame sent by a transmitting terminal, a receiving terminal extracts a training sequence from the data frame based on the determined training sequence distribution information;
in this embodiment, the distribution information of the training sequence represents the distribution of the training sequence in the data frame, and the receiving end can extract the training sequence from the data frame after determining the distribution information of the training sequence.
S108: and the receiving end acquires the environmental information of the current channel based on the extracted training sequence.
In this embodiment, the environment information of the channel may be determined based on some information of the training sequence, for example, phase information and amplitude information of the training sequence may be used, and specifically, this embodiment provides an implementation manner as follows:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
In this embodiment, the environment information of the channel may be estimated through the phase information and the amplitude information of the training sequence, where the environment information of the channel may include: a fading estimate of the channel and a phase offset estimate.
The channel environment may be estimated based on the phase information and the amplitude information of the training sequence through various methods, which is not limited in this embodiment. In this embodiment, the distribution information of the training sequences in different modes is used to represent different channel environment information, and the different distribution information of the training sequences may indicate that the training sequences inserted into the data frame are different, so that the training sequences inserted into the data frame may be changed based on the change of the channel environment.
Further, in this embodiment, the preamble sequence and the distribution information of the training sequence are bound together to have a one-to-one correspondence relationship, so that the receiving end can determine the distribution information of the training sequence based on the preamble sequence sent by the transmitting end, and acquire the training sequence in the received data frame based on the determined distribution information of the training sequence. Therefore, the interaction between the transmitting end and the receiving end is not increased, and the change of the channel condition can be timely and accurately reflected.
In this embodiment, the relationship between the training sequence distribution information and the channel environment information is set, and the distribution information of the training sequence changes after the channel environment changes, so that the positions and the number of the training sequences inserted into the data can change along with the channel environment. Therefore, when the channel environment meets a certain condition, the number of the training sequences inserted into the data frame can be reduced, so that the resources occupied by the training sequences are reduced, and the transmission efficiency of effective information is improved; and the relation of the distribution information of the leader sequence and the training sequence is set, so that the receiving end can determine the distribution information of the training sequence based on the received front-channel sequence, and the change of the channel environment can be timely and accurately reflected under the condition of not increasing the interaction between the transmitting end and the receiving end.
Further, in order to facilitate the analysis of the data frame, the training sequence in the data frame may be deleted after the training sequence is extracted.
The communication before the transmitting end and the receiving end may be communication between a terminal and a terminal or communication before the terminal and a base station. That is, the transmitting end may be a terminal, and the receiving end may be a terminal or a base station.
Referring to fig. 2, a schematic flow chart of a signal transmission method provided in an embodiment of the present invention is shown, in which the method is applied to a transmitting end, and includes:
s201: acquiring environment information of a channel;
in this embodiment, the environment information of the channel may characterize the stability of the channel or the fading condition of the channel.
The method for acquiring the environment information of the channel may include:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
The method for transmitting downlink data to the terminal (MS) by the Base Station (BS) includes the following two methods:
in the first mode, in the interaction process of a terminal and a base station, the base station sends downlink data to the terminal;
in the second mode, the base station transmits broadcast information, and the terminal receives the broadcast information transmitted by the base station.
For downlink data in the first mode, the terminal may estimate the environment of the channel based on the downlink data;
for the broadcast information in the second mode, the broadcast information received by the terminal may not be the one transmitted to the terminal by the channel, and the terminal cannot interpret the data, but the terminal may demodulate the received broadcast information and estimate the environment of the channel based on the demodulated data.
The method for estimating the environment of the signal may include multiple methods, which are not limited in this embodiment, and may include: blind estimation, semi-blind estimation, etc.
S202: configuring training sequence distribution information and a leader sequence based on the environment information of the channel;
in this embodiment, in order to distinguish the environment information of different channels, different training sequence distribution information is adopted to represent the environment information of different channels in this embodiment.
For example, the following steps are carried out: the channel environment of different situations can be represented by using various patterns of training sequence distribution, for example, model _1, model _2, and model _3 are used to represent one channel situation and represent training sequences, and the pattern of each training sequence distribution represents the position, number, etc. of the training sequence insertion.
In this embodiment, the following two ways may be adopted to configure training sequence distribution information based on the environment information of the channel:
the method comprises the steps that a corresponding relation between environment information of a channel and training sequence distribution information is preset at a transmitting end, and based on the corresponding relation, the distribution information of the training sequence can be determined through the environment information of the channel;
and secondly, analyzing the environment information of the channel, estimating the state of the current channel, and configuring the distribution information of the training sequence based on the state of the current channel.
In this embodiment, the preamble sequence and the training sequence distribution information have a one-to-one correspondence relationship, and the transmission end may preset the correspondence relationship between the training sequence distribution information and the preamble sequence, or set the correspondence relationship between the preamble information representing the preamble sequence and the distribution information of the training sequence.
The preamble information may be, for example, the type of preamble sequence.
Preferably, the method for configuring training sequence distribution information and preamble information provided in this embodiment includes:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring leading information corresponding to the distribution information of the training sequence from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and preamble information.
S203: inserting a training sequence in the data frame based on the training sequence distribution information;
in this embodiment, the training sequence distribution information is used to indicate the distribution of the training sequences, and is used at the transmitting end to indicate the distribution of the training sequences inserted into the data frame, for example, to indicate the number of training sequences and the positions of the training sequences inserted into the data frame.
It can be seen from this that, when the environmental information of the channel is different, the distribution information corresponds to different training sequences, that is, the distribution information corresponds to different training sequences.
The training sequence inserted into the data frame may change as the channel environment changes, for example, the position and number of the training sequence inserted into the data frame may change as the channel environment changes.
For example, when the channel environment is better, fewer training sequences may be inserted, and when the channel environment is worse, more training sequences may be inserted.
S204: sending the leader sequence to a receiving end; the leader sequence is used for determining the distribution information of the training sequence, and the distribution information of the training sequence is used for a receiving end to obtain the training sequence sent by a transmitting end;
in this embodiment, the preamble sequence is a series of signals transmitted before the effective signal is transmitted, and the effective signal is transmitted immediately after the preamble signal is transmitted.
In the prior art, the preamble sequence is used to remind the receiving end of sending a valid signal.
In this embodiment, the preamble sequence is distribution information for determining a training sequence, where the distribution information of the training sequence is used by the receiving end to obtain the training sequence sent by the transmitting end.
That is to say, in this embodiment, the preamble sequence may be used to remind the receiving end of sending an effective data signal, or may be used to determine distribution information of the training sequence.
S205: the transmitting terminal sends the data frame carrying the training sequence to the receiving terminal;
in this embodiment, the preamble sequence sent to the receiving end is used to determine the distribution information of the training sequence, and the distribution information of the training sequence is used for the receiving end to obtain the training sequence sent by the transmitting end.
In this embodiment, the distribution information of the training sequences in different modes is used to represent different channel environment information, and the different distribution information of the training sequences may indicate that the training sequences inserted into the data frame are different, so that the training sequences inserted into the data frame may be changed based on the change of the channel environment.
Referring to fig. 3, a further flowchart of a channel transmission method provided in an embodiment of the present invention is shown, where in this embodiment, the method includes:
s301: determining distribution information of a training sequence based on a leader sequence after receiving the leader sequence;
in this embodiment, the receiving end sets in advance a correspondence between the preamble sequence and the training sequence distribution information, and thus, after receiving the preamble sequence, the training sequence may be determined based on the correspondence.
As can be seen from the above description, the corresponding relationship between the preamble sequence and the training sequence distribution information may be a direct corresponding relationship or an indirect corresponding relationship.
Wherein, the direct correspondence can be expressed as:
the mapping relation of the leader sequence and the training sequence distribution information is preset at the receiving end.
The indirect correspondence can be expressed as:
and setting the corresponding relation between the preamble information represented by the preamble sequence and the training sequence distribution information.
And determining preamble information by analyzing the preamble sequence, and determining training sequence distribution information corresponding to the received preamble sequence based on the corresponding relation between the preamble information and the training sequence distribution information.
S302: after receiving a data frame sent by a transmitting terminal, extracting a training sequence from the data frame based on the determined training sequence distribution information;
in this embodiment, the distribution information of the training sequence represents the distribution of the training sequence in the data frame, and the receiving end can extract the training sequence from the data frame after determining the distribution information of the training sequence.
S303: and acquiring the environmental information of the current channel based on the extracted training sequence.
In this embodiment, the environment information of the channel may be determined based on some information of the training sequence, for example, phase information and amplitude information of the training sequence may be used, and specifically, this embodiment provides an implementation manner as follows:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
In this embodiment, the relationship between the distribution information of the preamble sequence and the training sequence is set, so that the receiving end can determine the distribution information of the training sequence based on the received preamble sequence, and thus, the change of the channel environment is reflected timely and accurately without increasing the interaction between the transmitting end and the receiving end.
Referring to fig. 4, a schematic structural diagram of a signal transmission apparatus according to an embodiment of the present invention is shown, in this embodiment, the apparatus includes:
a channel information collecting module 401, configured to obtain environment information of a channel;
a training sequence and preamble sequence configuration module 402, configured to configure training sequence distribution information and preamble sequence based on the environment information of the channel;
a training sequence inserting module 403, configured to insert a training sequence in a data frame according to the training sequence distribution information;
a preamble sequence sending module 404, configured to send a preamble sequence to a receiving end; the preamble sequence is used for determining the distribution information of the training sequence, and the distribution information of the training sequence is used for the receiving end to obtain the training sequence sent by the transmitting end.
A data frame sending module 405, configured to send a data frame carrying a training sequence to a receiving end; the training sequence is used for determining the environmental information of the channel of the transmitting terminal.
Optionally, the channel information collecting module includes:
the receiving submodule is used for receiving downlink data transmitted by the base station;
and the environment information estimation submodule is used for estimating the environment information of the channel based on the downlink data.
Optionally, the training sequence and preamble sequence configuring module includes:
the training sequence distribution information configuration submodule is used for acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
a leader sequence configuration submodule, configured to obtain a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
Through the device of the embodiment, the relation between the training sequence distribution information and the channel environment information is set at the transmitting end, and the distribution information of the training sequence is changed after the channel environment is changed, so that the position and the number of the training sequence inserted into the data can be changed along with the channel environment. Therefore, when the channel environment meets a certain condition, the number of the training sequences inserted into the data frame can be reduced, so that the resources occupied by the training sequences are reduced, and the transmission efficiency of effective information is improved.
Referring to fig. 5, a schematic structural diagram of a signal transmission apparatus provided in an embodiment of the present invention is shown, where the apparatus is applied to a receiving end, and the apparatus includes:
a preamble sequence identifying module 501, configured to determine distribution information of a training sequence based on a preamble sequence after the preamble sequence is received;
a training sequence extraction module 502, configured to, after the receiving end receives the data frame corresponding to the preamble sequence, extract a training sequence from the data frame based on the determined training sequence distribution information;
a channel estimation module 503, configured to determine environment information of the current channel based on the extracted training sequence.
Optionally, the channel estimation module includes:
the acquisition subunit is used for acquiring phase information and amplitude information of the training sequence;
a determining subunit, configured to determine environment information of the channel based on the phase information and the amplitude information.
Optionally, the method further includes:
and the training sequence deleting module is used for deleting the training sequence in the data frame to obtain the effective data in the data frame.
In addition, the receiving end further includes:
the frequency offset rough estimation module is used for obtaining rough estimation of frequency offset according to the leader sequence and transmitting the rough frequency offset to the rough frequency offset mixing module;
and the coarse frequency offset mixing module is used for mixing the data with the carrier residual to the vicinity of the baseband.
The device of the embodiment sets the relationship between the preamble sequence and the distribution information of the training sequence at the receiving end, so that the receiving end can determine the distribution information of the training sequence based on the received preamble sequence, and thus, the change of the channel environment can be timely and accurately reflected under the condition of not increasing the interaction between the transmitting end and the receiving end.
Referring to fig. 6, a schematic structural diagram of a signal transmission system disclosed in an embodiment of the present invention is shown, where the system includes:
a transmitting end 601 and a receiving end 602;
the transmitting terminal 601 is configured to perform the following method:
acquiring environment information of a channel;
configuring training sequence distribution information and a leader sequence based on the environment information of the channel;
inserting a training sequence into a data frame according to the training sequence distribution information;
sending the leader sequence to a receiving end; the leader sequence is used for determining the distribution information of the training sequence, and the distribution information of the training sequence is used for a receiving end to obtain the training sequence sent by a transmitting end;
sending the data frame carrying the training sequence to a receiving end; the training sequence is used for determining the environmental information of the channel of the transmitting terminal.
Optionally, the obtaining the environment information of the channel includes:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
Optionally, the configuring training sequence distribution information and preamble sequence based on the environment information of the channel includes:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
The receiving end 602 is configured to perform the following method:
after receiving a leader sequence, determining distribution information of a training sequence based on the leader sequence;
after the receiving end receives the data frame corresponding to the leader sequence, extracting a training sequence from the data frame based on the determined training sequence distribution information;
and determining the environmental information of the current channel based on the extracted training sequence.
Optionally, the determining environmental information of the current channel based on the extracted training sequence includes:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
Optionally, the method further includes:
deleting the training sequence in the data frame to obtain effective data in the data frame.
Through the system of the embodiment, the relationship between the training sequence distribution information and the channel environment information is set, and the distribution information of the training sequences can be changed after the channel environment is changed, so that the positions and the number of the training sequences inserted into the data can be changed along with the channel environment. Therefore, when the channel environment meets a certain condition, the number of the training sequences inserted into the data frame can be reduced, so that the resources occupied by the training sequences are reduced, and the transmission efficiency of effective information is improved; and the relation of the distribution information of the leader sequence and the training sequence is set, so that the receiving end can determine the distribution information of the training sequence based on the received front-channel sequence, and the change of the channel environment can be timely and accurately reflected under the condition of not increasing the interaction between the transmitting end and the receiving end.
Referring to fig. 7, a schematic structural diagram of an electronic device according to an embodiment of the present invention is shown, where in this embodiment, the electronic device includes:
a memory 701 and a processor 702;
wherein, the processor 702 is used for executing the program stored in the memory 701;
the program is for executing a signal transmission method executed by a transmitting end:
acquiring environment information of a channel;
configuring training sequence distribution information and a leader sequence based on the environment information of the channel;
inserting a training sequence into a data frame according to the training sequence distribution information;
sending the leader sequence to a receiving end; the leader sequence is used for determining the distribution information of the training sequence, and the distribution information of the training sequence is used for a receiving end to obtain the training sequence sent by a transmitting end;
sending the data frame carrying the training sequence to a receiving end; the training sequence is used for determining the environmental information of the channel of the transmitting terminal.
Optionally, the obtaining the environment information of the channel includes:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
Optionally, the configuring training sequence distribution information and preamble sequence based on the environment information of the channel includes:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
Alternatively, the program is configured to execute a signal transmission method executed by the receiving end:
after receiving a leader sequence, determining distribution information of a training sequence based on the leader sequence;
after the receiving end receives the data frame corresponding to the leader sequence, extracting a training sequence from the data frame based on the determined training sequence distribution information;
and determining the environmental information of the current channel based on the extracted training sequence.
Optionally, the determining environmental information of the current channel based on the extracted training sequence includes:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
Optionally, the method further includes:
deleting the training sequence in the data frame to obtain effective data in the data frame.
Alternatively, the program is for executing the signal transmission method described below:
a transmitting terminal acquires environment information of a channel;
a transmitting terminal configures training sequence distribution information and a leader sequence based on the environment information of a channel;
the transmitting terminal inserts a training sequence into the data frame based on the training sequence distribution information;
the transmitting terminal sends the leader sequence to the receiving terminal;
the transmitting terminal sends the data frame carrying the training sequence to the receiving terminal;
after receiving the leader sequence, the receiving end determines the distribution information of the training sequence based on the leader sequence;
after receiving a data frame sent by a transmitting terminal, a receiving terminal extracts a training sequence from the data frame based on the determined training sequence distribution information;
and the receiving end acquires the environmental information of the current channel based on the extracted training sequence.
Optionally, the acquiring, by the transmitting end, environment information of a channel includes:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
Optionally, the configuring, by the transmitting end, training sequence distribution information and a preamble sequence based on the environment information of the channel includes:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
Optionally, the determining, by the receiving end, the environment information of the current channel based on the extracted training sequence includes:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
Optionally, the method further includes:
and deleting the training sequence in the data frame by the receiving end to obtain the effective data in the data frame.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. A signal transmission method, applied to a transmitting end, comprising:
acquiring environment information of a channel;
configuring training sequence distribution information and a leader sequence based on the environment information of the channel;
inserting a training sequence into a data frame according to the training sequence distribution information;
sending the leader sequence to a receiving end; the leader sequence is used for determining the distribution information of the training sequence, and the distribution information of the training sequence is used for a receiving end to obtain the training sequence sent by a transmitting end;
sending the data frame carrying the training sequence to a receiving end; the training sequence is used for determining the environmental information of the channel of the transmitting terminal.
2. The method of claim 1, wherein the obtaining the environment information of the channel comprises:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
3. The method of claim 1, wherein configuring training sequence distribution information and preamble sequence based on the channel environment information comprises:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
4. A signal transmission method, applied to a receiving end, comprising:
after receiving a leader sequence, determining distribution information of a training sequence based on the leader sequence;
after the receiving end receives the data frame corresponding to the leader sequence, extracting a training sequence from the data frame based on the determined training sequence distribution information;
and determining the environmental information of the current channel based on the extracted training sequence.
5. The method of claim 4, wherein the determining environmental information of the current channel based on the extracted training sequence comprises:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
6. The method of claim 4, further comprising:
deleting the training sequence in the data frame to obtain effective data in the data frame.
7. A signal transmission method, comprising:
a transmitting terminal acquires environment information of a channel;
a transmitting terminal configures training sequence distribution information and a leader sequence based on the environment information of a channel;
the transmitting terminal inserts a training sequence into the data frame based on the training sequence distribution information;
the transmitting terminal sends the leader sequence to the receiving terminal;
the transmitting terminal sends the data frame carrying the training sequence to the receiving terminal;
after receiving the leader sequence, the receiving end determines the distribution information of the training sequence based on the leader sequence;
after receiving a data frame sent by a transmitting terminal, a receiving terminal extracts a training sequence from the data frame based on the determined training sequence distribution information;
and the receiving end acquires the environmental information of the current channel based on the extracted training sequence.
8. The method of claim 7, wherein the acquiring, by the transmitting end, the environment information of the channel comprises:
receiving downlink data transmitted by a base station;
and estimating the environment information of the channel based on the downlink data.
9. The method of claim 7, wherein the transmitting end configures training sequence distribution information and a preamble sequence based on the environment information of the channel, comprising:
acquiring training sequence distribution information corresponding to the environmental information of the channel from a preset first mapping table; the first mapping table comprises a corresponding relation between the environment information of the channel and the distribution information of the training sequence;
acquiring a leader sequence corresponding to the training sequence distribution information from a preset second mapping table; the second mapping table includes a correspondence between the training sequence distribution information and a preamble sequence.
10. The method of claim 7, wherein the determining, by the receiving end, the environment information of the current channel based on the extracted training sequence comprises:
acquiring phase information and amplitude information of the training sequence;
determining environment information of a channel based on the phase information and the amplitude information.
11. The method of claim 7, further comprising:
and deleting the training sequence in the data frame by the receiving end to obtain the effective data in the data frame.
12. A signal transmission system, comprising:
a transmitting end and a receiving end;
the transmitting end is used for executing the signal transmission method of the above claims 1-3;
the receiving end is configured to perform the signal transmission method according to claims 4 to 6.
13. An electronic device, characterized in that the electronic device comprises:
a memory and a processor;
wherein the processor is configured to execute a program stored in the memory;
the memory is used for storing a program for executing the signal transmission method of claims 1-3;
or a program for executing the signal transmission method of claims 4-6;
or a program for executing the signal transmission method of claims 7-10.
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