CN114050888B - UW-assisted relay network asynchronous superposition signal recovery method - Google Patents
UW-assisted relay network asynchronous superposition signal recovery method Download PDFInfo
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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Abstract
A method and a system for recovering asynchronous superposition signals of a relay network based on UW word assistance belong to the field of wireless communication signal processing. The invention solves the problem that the useful signal cannot be recovered because the terminal cannot separate the superimposed signal when the relay node amplifies and forwards the received asynchronous superimposed signal. The invention enables each terminal node to sequentially separate the asynchronous superposition signals received by the relay amplification and forwarding in the second time slot so as to realize interference removal and useful signal recovery. When the terminal node processes the asynchronous superposition signal received by the second time slot, the UW word is firstly used for determining the data position of the signal transmitted by the terminal node in the first time slot, then the data position of the signal is removed from the superposition signal, and finally the data position of the message signal which is wanted to be recovered is found by using another UW word and the message signal is recovered. The invention can be applied to the field of wireless communication.
Description
Technical Field
The invention belongs to the field of wireless communication signal processing, and particularly relates to a relay network asynchronous superposition signal recovery method based on UW word assistance.
Background
The cooperative communication utilizes the broadcasting characteristic of the wireless network, so that the relay node in the network can help the terminal node to carry out information transmission, thereby being beneficial to realizing effective utilization of communication resources. The cooperation among the nodes in the relay network can effectively improve the spectrum efficiency of the system, improve the connectivity of the network and enhance the reliability of the system. In the relay network, the relay forwarding protocol can be mainly divided into three types of amplification forwarding, decoding forwarding and compression forwarding. For amplify-and-forward, the relay node does not need to process the received signal, but simply amplifies and forwards the signal it receives to the terminal. The signals forwarded by the relay are the superposition result of the signals of the two terminals in the first time slot, and the superposition signals received by the terminal nodes are difficult to perfectly synchronize due to the problems of transmission delay, processing delay and the like. This will cause each terminal node to have difficulty finding the location of the interference created by the superimposed signal and the location of the useful signal, thereby removing the interference and recovering the useful signal.
In summary, when the relay node amplifies and forwards the received asynchronous superposition signal, the terminal cannot separate the superposition signal, so that the useful signal cannot be recovered.
Disclosure of Invention
The invention aims to solve the problem that useful signals cannot be recovered due to the fact that a terminal cannot separate superimposed signals when a relay node amplifies and forwards received unsynchronized superimposed signals, and provides a method for recovering the unsynchronized superimposed signals of a relay network based on UW (universal serial bus) assistance.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for recovering asynchronous superposition signals of a relay network based on UW word assistance specifically comprises the following steps:
in the first time slot, the terminal node processes the transmitting signal by:
a1, a terminal node A modulates 0, 1 bit data generated by a self information source, and the obtained modulation result is recorded as a sequence x A ；
The terminal node B modulates the 0, 1 bit data generated by the own information source, and the obtained modulation result is recorded as a sequence x B ；
Step A2, terminal node A in sequence x A Before adding UW word sequence u A Obtaining a sequence d added with UW word sequence A ；
Terminal node B in sequence x B Before adding UW word sequence u B Obtaining a sequence d added with UW word sequence B ；
Step A3, terminal node A pairs the sequence d A Processing and transmitting the processed signal to a channel; terminal node B pair sequence d B Processing and transmitting the processed signal to a channel;
the processing method of the relay node for the signals comprises the following steps:
step B1, a relay node receives a superposition signal of signals transmitted by a terminal node A and a terminal node B from a channel;
step B2, the relay node performs down-conversion treatment on the superimposed signal obtained in the step B1 to obtain a down-conversion treatment result;
then carrying out power amplification on the down-conversion processing result to obtain a signal after power amplification;
step B3, the relay node carries out up-conversion treatment on the power amplified signal obtained in the step B2, and transmits the up-converted signal to a channel;
in the second time slot, the processing method of the terminal node to the received signal is as follows:
step C1, the terminal node A receives the signal transmitted to the channel in the step B3, processes the received signal, and marks the obtained digital signal sequence as p A ；
The terminal node B receives the signal transmitted to the channel in the step B3, processes the received signal and marks the obtained digital signal sequence as p B ；
Step C2, at sequence p A In which terminal node a passes through the UW word sequence u A Find signal sequence d A And sequence d A From p A Is removed to obtain the removed d A Post signal sequence q A ；
In sequence p B In which the terminal node B passes through the UW word sequence u B Find signal sequence d B And sequence d B From p B Is removed to obtain the removed d B Post signal sequence q B ；
Step C3, in sequence q A In which the terminal node A is based on the UW word sequence u B Find signal sequence d B At the position and from the sequence q A Removing UW word sequence u B After that, a signal sequence y is obtained B ；
In sequence q B In which the terminal node B is based on the UW word sequence u A Find signal sequence d A At the position and from the sequence q B Removing UW word sequence u A Part, a signal sequence y is obtained A ；
Step C4, terminal node A pairSignal sequence y B Demapping to obtain 0 and 1 bit data; terminal node B pair signal sequence y A And (5) demapping to obtain 0 and 1 bit data.
Further, in the step A1, the modulation mode is baseband mapping.
Further, in the step A3, the processing manner is as follows:
terminal node a pair sequence d A Sequentially performing digital/analog conversion and up-conversion, and the terminal node B pairs the sequence d B Sequentially performing digital/analog conversion and up-conversion.
Further, in the step B2, the down-conversion processing result is subjected to power amplification, where the value range of the power amplification factor ζ isWherein P is 0 Is the power of the received signal of the relay node, P 1 Is the power at which the relay node forwards the signal.
Further, in the step C1, the received signal is processed in the following manner:
the received signal is subjected to down-conversion and analog/digital conversion in sequence.
The beneficial effects of the invention are as follows:
the invention adds different UW words to the front end of the transmitting signal of each terminal node in the relay system in the first time slot, so that each terminal node can separate the asynchronous superposition signal received by the relay amplification in the second time slot in order to realize interference removal and useful signal recovery. When the terminal node processes the asynchronous superposition signal received by the second time slot, the UW word is firstly used for determining the data position of the signal transmitted by the terminal node in the first time slot, then the data position of the signal is removed from the superposition signal, and finally the data position of the message signal which is wanted to be recovered is found by using another UW word and the message signal is recovered. The method ensures that the relay node can still assist the terminal node to carry out two-way communication when directly amplifying and forwarding the incompletely synchronized superimposed signal received by the first time slot, thereby greatly enhancing the practicability of the system.
Drawings
FIG. 1 is a schematic diagram of a system model of the present invention;
FIG. 2 is an overall flow chart of the signal transmission of the present invention;
fig. 3 is a schematic flow chart of a processing procedure of the first slot terminal node a on the transmission signal;
fig. 4 is a schematic flow chart of a processing procedure of a first slot terminal node B for transmitting signals;
fig. 5 is a schematic diagram of a processing flow of the second slot terminal node a on the received signal;
fig. 6 is a schematic diagram of a process flow of the second slot end node B for receiving signals.
Detailed Description
Detailed description of the inventionthe present embodiment is described with reference to fig. 1, 2, 3, 4, 5, and 6. The method for recovering the asynchronous superposition signal of the relay network based on UW word assistance in the embodiment specifically comprises the following steps:
in the first time slot, the terminal node processes the transmitting signal by:
a1, a terminal node A modulates 0, 1 bit data generated by a self information source, and the obtained modulation result is recorded as a sequence x A ；
The terminal node B modulates the 0, 1 bit data generated by the own information source, and the obtained modulation result is recorded as a sequence x B ；
Step A2, terminal node A in sequence x A Before adding UW word sequence u A Obtaining a sequence d added with UW word sequence A ；
Terminal node B in sequence x B Before adding UW word sequence u B Obtaining a sequence d added with UW word sequence B ；
Step A3, terminal node A pairs the sequence d A Processing and transmitting the processed signal to a channel; terminal node B pair sequence d B Processing and transmitting the processed signal to a channel;
the processing method of the relay node for the signals comprises the following steps:
step B1, a relay node receives a superposition signal of signals transmitted by a terminal node A and a terminal node B from a channel;
step B2, the relay node performs down-conversion treatment on the superimposed signal obtained in the step B1 to obtain a down-conversion treatment result;
then carrying out power amplification on the down-conversion processing result to obtain a signal after power amplification;
step B3, the relay node carries out up-conversion treatment on the power amplified signal obtained in the step B2, and transmits the up-converted signal to a channel;
in the second time slot, the processing method of the terminal node to the received signal is as follows:
step C1, the terminal node A receives the signal transmitted to the channel in the step B3, processes the received signal, and marks the obtained digital signal sequence as p A ；
The terminal node B receives the signal transmitted to the channel in the step B3, processes the received signal and marks the obtained digital signal sequence as p B ；
Step C2, at sequence p A In which terminal node a passes through the UW word sequence u A Find signal sequence d A And sequence d A From p A Is removed to obtain the removed d A Post signal sequence q A ；
In sequence p B In which the terminal node B passes through the UW word sequence u B Find signal sequence d B And sequence d B From p B Is removed to obtain the removed d B Post signal sequence q B ；
Step C3, in sequence q A In which the terminal node A is based on the UW word sequence u B Find signal sequence d B At the position and from the sequence q A Removing UW word sequence u B After that, a signal sequence y is obtained B ；
In sequence q B In which the terminal node B is based on the UW word sequence u A Find signal sequence d A At the position and from the sequence q B Removing UW word sequence u A Part, a signal sequence y is obtained A ；
Step C4, terminal node A pairs signal sequence y B Demapping to obtain 0 and 1 bit data; terminal node B pair signal sequence y A And (5) demapping to obtain 0 and 1 bit data.
In this embodiment, the UW word should be a UW word with a relatively obvious autocorrelation characteristic, and for example, the UW word sequence may be a ZC sequence.
The invention solves the problem that communication is difficult to carry out when the superposition signals received by the relay node are asynchronous, and the method ensures that the relay node can still assist the terminal node to carry out bidirectional communication when the superposition signals which are not completely synchronous and received by the first time slot are amplified and forwarded directly, thereby greatly enhancing the practicability of the system.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is that in the step A1, the modulation mode is baseband mapping.
Other steps and parameters are the same as in the first embodiment.
And a third specific embodiment: the difference between this embodiment and the first or second embodiment is that, in the step A3, the processing manner is as follows:
terminal node a pair sequence d A Sequentially performing digital/analog conversion and up-conversion, and the terminal node B pairs the sequence d B Sequentially performing digital/analog conversion and up-conversion.
Other steps and parameters are the same as in the first or second embodiment.
The specific embodiment IV is as follows: the difference between the present embodiment and one to three embodiments is that in the step B2, the down-conversion processing result is power amplified, and the value range of the power amplification factor ζ isWherein P is 0 Is the power of the received signal of the relay node, P 1 The power of the signal forwarded by the relay node, namely the power of the signal after power amplification.
Other steps and parameters are the same as in one to three embodiments.
Fifth embodiment: the difference between this embodiment and one to four embodiments is that, in the step C1, the received signal is processed in the following manner:
the received signal is subjected to down-conversion and analog/digital conversion in sequence.
I.e. the terminal node a and the terminal node B both perform down-conversion and analog/digital conversion processing on the received signals in sequence.
Other steps and parameters are the same as in one to four embodiments.
The above examples of the present invention are only for describing the calculation model and calculation flow of the present invention in detail, and are not limiting of the embodiments of the present invention. Other variations and modifications of the above description will be apparent to those of ordinary skill in the art, and it is not intended to be exhaustive of all embodiments, all of which are within the scope of the invention.
Claims (5)
1. The UW-assisted relay network asynchronous superposition signal recovery method is characterized by comprising the following steps of:
in the first time slot, the terminal node processes the transmitting signal by:
a1, a terminal node A modulates 0, 1 bit data generated by a self information source, and the obtained modulation result is recorded as a sequence x A ；
The terminal node B modulates the 0, 1 bit data generated by the own information source, and the obtained modulation result is recorded as a sequence x B ；
Step A2, terminal node A in sequence x A Before adding UW word sequence u A Obtaining a sequence d added with UW word sequence A ；
Terminal node B in sequence x B Before adding UW word sequence u B Obtaining a sequence d added with UW word sequence B ；
Step A3, terminal node A pairs the sequence d A Processing and transmitting the processed signal to a channel; terminal node B pair sequence d B Processing and transmitting the processed signal to a channel;
the processing method of the relay node for the signals comprises the following steps:
step B1, a relay node receives a superposition signal of signals transmitted by a terminal node A and a terminal node B from a channel;
step B2, the relay node performs down-conversion treatment on the superimposed signal obtained in the step B1 to obtain a down-conversion treatment result;
then carrying out power amplification on the down-conversion processing result to obtain a signal after power amplification;
step B3, the relay node carries out up-conversion treatment on the power amplified signal obtained in the step B2, and transmits the up-converted signal to a channel;
in the second time slot, the processing method of the terminal node to the received signal is as follows:
step C1, the terminal node A receives the signal transmitted to the channel in the step B3, processes the received signal, and marks the obtained digital signal sequence as p A ；
The terminal node B receives the signal transmitted to the channel in the step B3, processes the received signal and marks the obtained digital signal sequence as p B ；
Step C2, at sequence p A In which terminal node a passes through the UW word sequence u A Find signal sequence d A And sequence d A From p A Is removed to obtain the removed d A Post signal sequence q A ；
In sequence p B In which the terminal node B passes through the UW word sequence u B Find signal sequence d B And sequence d B From p B Is removed to obtain the removed d B Post signal sequence q B ；
Step C3, in sequence q A In which the terminal node A is based on the UW word sequence u B Find signal sequence d B At the position and from the sequence q A Is removed fromuW word sequence u B After that, a signal sequence y is obtained B ；
In sequence q B In which the terminal node B is based on the UW word sequence u A Find signal sequence d A At the position and from the sequence q B Removing UW word sequence u A Part, a signal sequence y is obtained A ；
Step C4, terminal node A pairs signal sequence y B Demapping to obtain 0 and 1 bit data; terminal node B pair signal sequence y A And (5) demapping to obtain 0 and 1 bit data.
2. The method for recovering the asynchronous superposition signals of the relay network based on the UW assistance according to claim 1, wherein in the step A1, the modulation mode is baseband mapping.
3. The method for recovering the asynchronous superposition signal of the relay network based on UW word assistance according to claim 2, wherein in the step A3, the processing mode is as follows:
terminal node a pair sequence d A Sequentially performing digital/analog conversion and up-conversion, and the terminal node B pairs the sequence d B Sequentially performing digital/analog conversion and up-conversion.
4. The method for recovering unsynchronized superimposed signals of a relay network based on UW word assistance according to claim 3, wherein in said step B2, the down-conversion processing result is power amplified, and the value range of the power amplification factor ζ isWherein P is 0 Is the power of the received signal of the relay node, P 1 Is the power at which the relay node forwards the signal.
5. The method for recovering the asynchronous superposition signals of the relay network based on UW word assistance according to claim 4, wherein in the step C1, the received signals are processed in the following manner:
the received signal is subjected to down-conversion and analog/digital conversion in sequence.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571296A (en) * | 2004-05-01 | 2005-01-26 | 中兴通讯股份有限公司 | A method of frame synchronization for wireless interface of time division communication system |
| CN101588339A (en) * | 2009-06-12 | 2009-11-25 | 北京邮电大学 | Method for reducing wireless relaying redundant forwarding on the basis of iterated code |
| CN103051427A (en) * | 2013-01-25 | 2013-04-17 | 西安电子科技大学 | Duplex wireless relay communication method based on network coding |
| KR101275852B1 (en) * | 2012-03-27 | 2013-06-17 | 연세대학교 산학협력단 | Method and apparatus for transmitting/receiving data based on sc-fde using uw |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571296A (en) * | 2004-05-01 | 2005-01-26 | 中兴通讯股份有限公司 | A method of frame synchronization for wireless interface of time division communication system |
| CN101588339A (en) * | 2009-06-12 | 2009-11-25 | 北京邮电大学 | Method for reducing wireless relaying redundant forwarding on the basis of iterated code |
| KR101275852B1 (en) * | 2012-03-27 | 2013-06-17 | 연세대학교 산학협력단 | Method and apparatus for transmitting/receiving data based on sc-fde using uw |
| CN103051427A (en) * | 2013-01-25 | 2013-04-17 | 西安电子科技大学 | Duplex wireless relay communication method based on network coding |
Non-Patent Citations (1)
| Title |
|---|
| UWB Ad Hoc网络无线接入特性与定位辅助路由分析;刘珩;安建平;;南京邮电大学学报(自然科学版)(第02期);全文 * |
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