WO2014090177A1

WO2014090177A1 - Signal processing method and apparatus

Info

Publication number: WO2014090177A1
Application number: PCT/CN2013/089233
Authority: WO
Inventors: 王锐; 杜颖钢; 维斯瓦纳特普拉莫德
Original assignee: 华为技术有限公司
Priority date: 2012-12-12
Filing date: 2013-12-12
Publication date: 2014-06-19
Also published as: CN103874074B; CN103874074A

Abstract

Embodiments of the present invention provide a signal processing method and apparatus. When a spectrum of a coordinating link and a spectrum of a signal link are the same, a receiving end first receives a useful signal of a current timeslot and a signal corresponding to interference information of a previous timeslot, and then obtains useful information from the signal according to pre-obtained demodulation information of the previous timeslot. Useful information can be obtained without using a coordinating link that is orthogonal to the signal link, and therefore, extra spectrum consumption is avoided.

Description

Signal processing method and device

The present invention relates to the field of communications, and in particular, to a signal processing method and apparatus. Background technique

In some communication scenarios, there are multiple transmitting ends and multiple receiving ends, and the multiple transmitting ends and multiple receiving ends use the same wireless time-frequency resource for communication, and therefore, each transmitting end corresponds to itself. When the receiving end sends data, it will cause interference to other receiving ends. That is to say, the receiving end receives the interference signal from other transmitting ends while receiving the required signal. For example, as shown in FIG. 1, a system consisting of two transmitting ends (Si^S2) and two receiving ends (D1 and D2), wherein S1 transmits data to D1, and S2 transmits data to D2, S1 and D1 ( Or the data link between S2 and D2) is called the signal link. D1 receives the signal transmitted by S1 and receives the signal transmitted by D2. This signal is the interference signal for D1. Similarly, D2 will also receive. The interference signal transmitted to S1, the data link between S1 and D2 (or S2 and D1) is called the interference link.

In order to eliminate the interference signal at the receiving end, a communication link is usually set up between the receiving ends, which is called a cooperative link, so that different receiving ends exchange respective received signals, which are called cooperative signals, but cooperative links and transmissions The spectrum of the link (signal link) that sends signals to the receiver is orthogonal, so additional spectrum resources need to be consumed. Summary of the invention

In view of this, the embodiments of the present invention provide a signal processing method and apparatus, which are directed to solving the problem of additional spectrum resource consumption caused by the existing co-channel interference cancellation method.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

A signal processing method, the cooperative link of the receiving end is the same as the spectrum of the signal link and the interference link, and the method includes:

Receiving, by the receiving end, a signal of a current time slot, where the signal of the current time slot includes a useful signal of a current time slot and a signal corresponding to interference information of a previous time slot; According to the demodulation information of the previous time slot, useful information is obtained from the signal.

A signal processing device, the cooperative link of the receiving end is the same as the spectrum of the signal link and the interference link, and the device includes:

a receiving module, configured to receive, by the receiving end, a signal of a current time slot, where the signal of the current time slot includes a useful signal of a current time slot and a signal corresponding to interference information of a previous time slot;

And a demodulation module, configured to obtain useful information from the signal according to demodulation information of the previous time slot. A communication device, comprising:

a radio interface, configured to receive a signal of a current time slot, where the signal of the current time slot includes a useful signal of a current time slot and a signal corresponding to interference information of a previous time slot;

And a processor, configured to obtain useful information from the signal according to demodulation information of the previous time slot. In the signal processing method and device according to the embodiment of the present invention, when the spectrum of the cooperative link and the signal link are the same, the receiving end first receives the useful signal of the current time slot and the signal corresponding to the interference information of the previous time slot, and then According to the pre-acquired demodulation information of the previous time slot, the useful information is obtained from the signal, because it is no longer necessary to use the cooperative link orthogonal to the signal link to obtain useful information, and therefore, additional consumption of the spectrum can be avoided. 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 embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural diagram of a communication system;

2 is a flowchart of a signal processing method according to an embodiment of the present invention;

3 is a flowchart of still another signal processing method according to an embodiment of the present invention;

4 is a flowchart of still another signal processing method according to an embodiment of the present invention;

FIG. 5 is a flowchart of still another signal processing method according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of still another signal processing apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of still another signal processing apparatus according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of receiving a communication device according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. 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 obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention discloses a signal processing method, which is used for the terminal shown in FIG. 1 , where D1 is taken as an example, and the method includes:

S201: Receive a signal, where the signal includes a useful signal of a current time slot and a signal corresponding to interference information of a previous time slot;

S202: Obtain useful information from the signal according to the demodulated information of the previous time slot acquired in advance.

In this embodiment, the signal received by D1 is a signal corresponding to the interference signal of the previous time slot by the useful signal of the current time slot, that is, in the current time slot, D1 receives both the useful signal and the previous time slot. The signal corresponding to the interference information, D1 can obtain useful information from the signal according to the demodulation information of the previous time slot acquired in advance, and the cooperative link is the same as the spectrum of the signal link and the interference link, so it is not necessary The cooperative link is set to a channel orthogonal to the signal link, thereby avoiding waste of spectrum resources. Another signal processing method disclosed in the embodiment of the present invention is applicable to the following scenarios:

In the communication system shown in FIG. 1, the channel quality of the cooperative link is better than the channel quality of the signal link, and the signal quality of the signal link is better than the signal quality of the interference link. Both receiving ends D1 and D2 can simultaneously transmit and receive signals on the same spectrum, that is, full-duplex communication mode. For convenience of description, in this embodiment, the second time slot is used as the current time slot, and the first time slot is used as the previous time slot of the current time slot. In the first time slot, S1 and S2 respectively send signals. For D1, S2 Sent The signal is an interference signal. In the second time slot, S1 and S2 also send signals, and D2 transmits the signal corresponding to the interference information of the first time slot to D1 through the cooperative link, and D1 sends the signal to D2 through the cooperative link. The signal corresponding to the information of the first power useful signal of the first time slot of D1, that is, the signal corresponding to the dry 4 special information of the first time slot of D2.

As shown in FIG. 3, the method includes:

S301: In the first time slot, D1 receives a signal, where the signal includes a first power useful signal PUB1(1) and a second power useful signal PVT1(1), wherein the power of PUB1(1) is greater than the power of PVT1(1) , the first power interference signal PUB2 (1), the second power interference signal PVT2 (1), then the signal received by D1 can be expressed as:

Yl(l) = Hn x (PUB1(1) + PVT1(1)) + H ₂₁ x (PUB2(1) + PVT2(1)) + Zl(l) , where Zl(l) channel noise.

S302: Detecting useful information of the first power useful signal in Υΐ(ι) according to the channel information Hu of the signal link;

That is, the useful information Inf ^1) in PUB1 (1) is detected.

^H ll

S303: Restore the first power useful signal PUBI (1) according to the useful information;

S304: Determine that the remaining signal after removing the first power useful signal in the received signal is demodulation information.

The component of PUBI (1) is removed from Υ1(1), and the remaining signal is denoted as REM1(1), which is used as demodulation information of the second time slot, where REM1(1) = Y1(1) - Hn χΡί/β1(1).

S305: In the i-slot, i is a natural number and is greater than 1, where i=2 is taken as an example, and the second time slot receives the signal;

The signal includes: a first power useful signal PUB1 (2) of the second time slot and a second power useful signal PVT1 (2), wherein the power of the PUB1 (2) is greater than the power of the PVT1 (2), the first power interference signal PUB2 (2), the second power interference signal PVT2 (2), the signal PUB2'(1) corresponding to the interference information of the first time slot, in this embodiment, the signal corresponding to the interference information of the first time slot is received by the receiving end D1 The cooperative receiving end D2 modulates and transmits the interference information inf _P[/B2 (i) of the first time slot, and records it as the first cooperative signal, wherein PUB2, (1) may be the same as PUB2 (1), or may be different. . Then the signal received by D1 in the second time slot can be expressed as: Yl(2) = H _D x PUB2'(2) + x (PUB 1(2) + PVT1(2)) + H ₂₁ x (PUB2(2) + PVT2(2)) + Zl(2) „

S306: Obtain useful information from the signal according to the demodulated information of the previous time slot acquired in advance. The specific process includes:

Obtaining interference information of the first power signal of the first time slot from the signal according to the channel information of the cooperative link, that is, detecting PUB2 according to ^, and demodulating and decoding, obtaining information Info _PUB2 (1); The interference information Info _PUB2 (1) restores the first time slot first power interference signal PUB2 (1) and the first cooperation signal PUB2, (1);

Demodulating the useful information in the second power useful signal of the first time slot according to the demodulation information R E M 1 ( 1 ) and the interference signal PUB2(1) of the first power of the first time slot, that is, according to

REM1(1)-H ₂₁ XPUB2(1)

Detecting PVT1 ( 1 ) and demodulating and decoding, obtaining information Info _PVT1 (1); detecting a first power useful signal of the current time slot according to channel information of the signal link, channel information of the cooperative link, and the cooperation signal And demodulating useful information in the first power useful signal of the current time slot, that is, detecting PUB1(2) according to ^Y1 ( ² )-^ ^XPUB2/(1 ) and demodulating and decoding, obtaining a letter

^H ll

Infop legs (2).

S307: Obtain demodulation information of a signal of a next time slot, that is, a third time slot, from the signal;

The next demodulation of D1 takes place in the next time slot, ie similarly to the first time slot, according to

InfopuBi(2) restores PUB1 ( 2 ) and subtracts the component including PUB1 ( 2 ) from the signal.

REM1(2) = Yl(2) - H _D X PUB2'(1) - H _l X PUB1 ( 2 ) .

S308: Send a signal corresponding to the first power useful information of the last time slot to the cooperative receiving end in the current time slot.

That is, in the second time slot, D1 transmits a signal PUB1 '(1) adjusted by Info _PUB1 (1) to D2, which may be the same as or different from PUB1(1).

The purpose of transmitting this signal is to provide D2 with the signal corresponding to the interference information of D2, so that D2 demodulates the received signal to obtain useful information. In this embodiment, D1 is taken as an example for explanation, and the solution of D2 is obtained. The tuning process is the same and will not be repeated here.

It can be seen from the above steps that in the second time slot, the information of the first power useful signal signal of the current time slot and the useful information of the second power signal of the previous time slot are all solved. And so on, in the i-th time slot, PUB1 (0, of the current time slot and PVT1 (i-1) of the previous time slot are demodulated. Therefore, after the first time slot and the second time slot, the receiving end can demodulate some useful information without additional spectrum occupation. Therefore, the method described in this embodiment can save spectrum resources.

In this embodiment, D2 is a full-duplex receiving end. In addition, D2 may also be a half-duplex receiving end. In this case, each time slot of S2 transmits a PUB signal and a PVT signal, and S1 is each time. The slot only transmits the PUB signal. Correspondingly, the signal processing flow of D2 is the same as the above process, and D1 only needs to detect the useful information of the PUB signal, and the detection method is the same as the method for detecting the PUB signal, without detecting the PVT. Useful information in . The signal processing method disclosed in the embodiment of the present invention is different from the method described in the foregoing embodiment in that the method in the foregoing embodiment is performed in the first time slot and the second time slot, but the embodiment is The method is performed in a first time slot, a second time slot, and a third time slot. In the communication system shown in FIG. 1, the first time slot, S1 and S2 respectively send signals, and in the second time slot, S1 sends a signal, D2 sends a signal corresponding to the interference information of the first time slot to D1 through the cooperative link, in the third time slot, S2 sends a message, and D1 sends the first time slot of D1 to D2 through the cooperative link. A signal corresponding to the information of the power useful signal, that is, a signal corresponding to the interference information of the first time slot of D2.

As shown in FIG. 4, the method includes:

S401: Receive a signal in a first time slot, and receive a signal in the first time slot by D1 as:

Yl(l) = Hn x (PUB1(1) + PVT1(1)) + H ₂₁ x (PUB2(1) + PVT2(1)) + Zl(l).

S402: Detecting useful information of the first power useful signal in Υΐ(ι) according to the channel information Hu of the signal link;

S403: Restore the first power useful signal PUBI (1) according to the useful information;

S404: Determine, in the signal of the current time slot, that the remaining signal after removing the first power useful signal is demodulation information.

The component of PUBI (1) is removed from Υ1(1), and the remaining signal is recorded as REM1(1), which is used as demodulation information for the second time slot, where REM1(1) = Y1(1) - Hn χ Ρί/β1(1).

S405: Receive a signal of a second time slot.

The signal includes: a first power useful signal PUB1 ( 2 ) of the second time slot and a second power useful signal PVT1 ( 2 ), wherein the power of the PUB1 ( 2 ) is greater than the power of the PVT 1 ( 2 ), the first time The signal corresponding to the interference information of the slot PUB2'(1), in this embodiment, the signal corresponding to the interference information of the first time slot is the interference information inf of the first time slot by the cooperative receiving end D2 of the receiving end D1. _P[/B2 (i) is modulated and transmitted, and is recorded as the first cooperative signal. Among them, PUB2, (1) may be the same as PUB2 (1), or may be different. Then the signal received by D1 in the second time slot can be expressed as:

Yl(2) = Hn x (PUB1(2) + PVT1(2)) + H _D x PUB2'(1) + Zl(2).

S406: Obtain useful information from the signal according to the demodulated information of the previous time slot acquired in advance, where the useful information Info _PUB2 (2) of the current time slot and the useful information Info _PVT1 (1) of the previous time slot are _obtained . The specific process is the same as that of the previous embodiment, and details are not described herein again.

In addition, in this embodiment, the information in the second power useful signal of the current time slot may also be acquired, that is, according to Y 2) - H _D X D D - HuXP belly (2) detecting _{PVT1 (2} ) and decoding, obtaining information

^Η ιι

Inf. PVTi (2).

Different from the above embodiment, in the foregoing embodiment, in the second time slot, S2 sends a signal, which forms interference to D1, and therefore, the demodulation of the second power useful signal with lower power causes interference, so currently The second power useful signal of the time slot can only be demodulated in the next time slot. In this embodiment, the second time slot S2 does not transmit a signal, therefore, D1 does not receive the interference signal, so the current time slot can be received. The second power useful signal is demodulated.

In addition, since the useful signals of the current time slot are demodulated in this embodiment, there is no unknown signal, and therefore, it is not necessary to calculate the demodulation information of the next demodulation.

S407: Send, in the third time slot, a signal corresponding to the first power useful information of the first time slot to the cooperative receiving end.

That is, in the third time slot, D1 sends a signal PUB1 (1) adjusted by Info _PUB1 (1) to D2, which may be the same as PUB1(1), or may be different, so that D2 is in the third time slot pair. The received signal is demodulated to obtain useful information.

In this embodiment, the first three time slots may be one demodulation period, and so on, every three consecutive time slots may be used as one demodulation period, and the signal processing flow in one demodulation period is in this embodiment. The steps described are the same.

Another signal processing method disclosed in the embodiment of the present invention is applicable to the following scenarios: In the communication system shown in FIG. 1, the quality of the signal link is greater than the quality of the interference link and the cooperative link, and D2 is a full duplex communication mode. In the first time slot, S1 and S2 send signals. For D1, the signal sent by S2 is an interference signal, in the second time slot, S1 and S2 send signals, and S2 sends the interference information corresponding to the first time slot. Signal, D2 sends a cooperative signal.

As shown in FIG. 5, the method includes:

S501: In the first time slot, D1 receives a signal;

The signal includes: a signal PUB1 ( 1 ) sent by S1 and a signal PUB2 ( 1 ) sent by S2. The signal received by D1 can be expressed as:

Yl(l) = Hn x PUB1(1) + H ₂₁ x PUB2(1) + Zl(l).

S502: Detecting useful information in the useful signal according to channel information of the signal link; that is, D1 performs signal demodulation and decoding according to detecting PUB1(1) to obtain corresponding information.

^H ll

Infop legs (1).

S503: Depending on the useful information, the useful signal is restored, that is, the useful information InfopuBi(1) is modulated, and the useful signal PUB1(1) of the previous time slot is generated;

S505: Determine, in the signal of the current time slot, that the remaining signal after removing the useful signal is demodulation information;

D1 restores PUB1(1) based on the detected Info _PUB1 (1), and deletes the component of PUB1(1) from the received signal, and records that the remaining signal is REM1(1). That is, REM1(1) = Yl(l) - X PUB1(1).

S506: Receive a signal in the second time slot, where the signal includes: an interference signal of the power-transformed previous time slot transmitted by the interference transmitting end, an interference signal of a current time slot, and a second coordinated signal sent by the cooperative receiving end. .

That is, in the second time slot, S1 transmits PUB1(2), and S2 transmits A x PUB2(i-1)+PUB2(i), where A is the power amplification factor and D2 transmits the signal— ^{H 2 l XAxY2 (i} — D, i is natural

H ₂₂ xH _D

Number, and greater than 1, where i=2. Different from the foregoing embodiment, the interference signal of the last time slot in this embodiment is sent by S2 to D1, instead of being sent to D1 by D2. Accordingly, in this embodiment, D2 is sent to D1 as the second collaboration. signal.

In the second time slot, the signal received by D1 is expressed as: Yl(2) = - H _D x ²⁽¹⁾ + Hn x PUB1(2) + H ₂₁ x (A x PUB2(1) + PUB2(2)) + Zl(2) =

x Z2(l);

S507: Obtain useful information from the signal according to the demodulation information of the previous time slot acquired in advance, which specifically includes:

Modulating useful information of the previous time slot to generate a useful signal of a previous time slot;

Detecting a useful signal of a current time slot in the signal according to channel information of the signal link, channel information of the interference link, and a useful signal of the previous time slot;

The useful signal of the current time slot is demodulated to obtain useful information of the current time slot.

That is: D1 encodes and modulates Info _PUB1 (l) to generate PUB1(1);

PUB1(2) and decode it to obtain Infop _{UB 1} (2) from

D1 detects the useful information of the first time slot and the second time slot.

In this embodiment, because the channel quality of the signal link is better than the signal quality of the cooperative link, the interference transmitter S2 can use the signal corresponding to the interference information of the time slot on the D1 to be sent to the D1 through the signal link. Let D1 remove the interference component of the signal and obtain useful information.

In this embodiment, since the signals transmitted by S1 and S2 in the second time slot are different, the method for demodulating the useful signal by D2 is different from D1. In this embodiment, D2 does not need to transmit the interference of the previous time slot of D2 in D1. The signal corresponding to the information can demodulate the useful signal by itself. The specific process is as follows:

D2 detects PUB2(1) according to ^H22 ' ^xY2(2)+H22 ' ^xR ₂ ^EM2 (1) and decodes it to obtain

(A+l)x|H ₂₂ |

Info _PUB2 (l); Similarly, D2 can also obtain the demodulation information of the third time slot, that is, encode and modulate Info _PUB2 (l), restore PUB2(1), record REM2 (2) = Y2 (2) ) - Η ₂₂ XAX PUB2 (1).

In this embodiment, since the signal link quality is greater than the signal link quality, the interference end of the receiving end transmits the signal corresponding to the interference information of the previous time slot, and the receiving end can also remove the interference signal to obtain useful information without Occupy too much spectrum resources. It should be noted that, in the embodiment of the present invention, a uniform first time slot, a second time slot, a third time slot, and the like are taken as an example. If the current time slot is another time slot, the method may be analogized. Place Therefore, the case of other time slots is also within the scope of protection of the present invention. Corresponding to the above method, the embodiment of the invention discloses a signal processing device, which is used for the receiving end, as shown in FIG. 6, and includes:

The receiving module 601 is configured to receive a signal of a current time slot, where the signal of the current time slot includes a useful signal of a current time slot and a signal corresponding to interference information of a previous time slot;

The demodulation module 602 is configured to obtain useful information from the signal according to the demodulated information of the previous time slot acquired in advance.

The device in this embodiment is used in the receiving end, and the cooperative link of the receiving end is the same as the spectrum of the signal link and the interference link, so that spectrum resources can be saved. As shown in FIG. 7, a signal processing apparatus according to an embodiment of the present invention specifically includes: a receiving module 701;

The first demodulation information obtaining module 702 is configured to: when the quality of the coordinated link is better than the quality of the signal link, and the quality of the signal link is better than the quality of the interference link, Receiving a signal in a previous time slot, the signal comprising: a first power useful signal, a second power useful signal, a first power interference signal, and a second power interference signal, according to channel information of the signal link of the receiving end, detecting and receiving Deriving useful information of the first power useful signal in the received signal, restoring the first power useful signal according to the useful information, and determining remaining of the signal of the current time slot after removing the first power useful signal The signal is demodulated information.

The first demodulation unit 703 is configured to obtain interference information of the first power signal of the last time slot from the signal according to the channel information of the cooperative link, and restore the first power interference signal of the previous time slot according to the interference information. And the first cooperative signal; demodulating the useful information in the second power useful signal of the previous time slot according to the demodulation information and the first time slot first power interference signal; Channel information, channel information of the cooperative link, and the cooperative signal, demodulate useful information in the first power useful signal of the current time slot; demodulate according to channel information of the cooperative link and channel information of the signal link Useful information in the second power signal of the current time slot;

The sending module 704 is configured to send the current time slot to the cooperative receiving end in the current time slot or the next time slot. The first power interferes with the signal corresponding to the information.

A signal processing apparatus disclosed in the embodiment of the present invention, as shown in FIG. 8, includes: a receiving module 801;

The second demodulation information acquiring module 802 is configured to: when the quality of the signal link is greater than the quality of the interference link and the coordinated link, receive a signal in the previous time slot, where the signal includes: a useful signal and an interference signal; detecting useful information in the signal according to channel information of the signal link; restoring the useful signal according to the useful information; determining that the useful signal is removed from the signal of the current time slot The remaining signal is demodulated information.

a second demodulation unit 803, configured to modulate useful information of the previous time slot, to generate a useful signal of a previous time slot; according to channel information of the signal link, channel information of the interference link, and a useful signal of the previous time slot And detecting a useful signal of a current time slot in the signal; demodulating the useful signal of the current time slot to obtain useful information of a current time slot. The embodiment of the invention further discloses a communication device, as shown in FIG. 9, comprising:

a radio interface 901, configured to receive a signal of a current time slot, where the signal of the current time slot includes a useful signal of a current time slot and a signal corresponding to interference information of a previous time slot;

The processor 902 is configured to obtain useful information from the signal according to the demodulated information of the previous time slot acquired in advance. The functions described in the method of the present embodiment can be stored in a readable storage medium of a computing device if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, a portion of the embodiments of the present invention that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a The computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. The medium in which the program code is stored.

The various embodiments in the present specification are described in a progressive manner, and each embodiment is mainly described as being different from the other embodiments, and the same or similar parts of the respective embodiments may be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the broadest scope consistent with the principles and novel features disclosed herein.

Claims

claims

1. A signal processing method, characterized in that the cooperative link at the receiving end has the same frequency as the signal link and the interference link. The method includes:

The receiving end receives the signal of the current time slot, and the signal of the current time slot includes the useful signal of the current time slot and the signal corresponding to the interference information of the previous time slot;

Useful information is obtained from the signal based on the demodulation information of the previous time slot.

2. The method according to claim 1, characterized in that, when the quality of the cooperative link is better than the quality of the signal link, and the quality of the signal link is better than the quality of the interference link When , the acquisition process of the demodulation information of the previous time slot includes:

In the previous time slot, signals are received, and the signals include: a first power useful signal, a second power useful signal, a first power interference signal and a second power interference signal;

Detect useful information of the first power useful signal in the received signal based on the channel information of the signal link at the receiving end;

According to the useful information, restore the first power useful signal;

It is determined that the remaining signal in the received signal after removing the first power useful signal is demodulation information.

3. The method according to claim 2, characterized in that the signal includes:

The first power useful signal of the current time slot and the second power useful signal of the current time slot;

The first power interference signal of the current time slot and the second power interference signal of the current time slot;

The signals corresponding to the interference information of the previous time slot include:

The first cooperation signal is modulated and sent by the cooperative receiving end to modulate the interference information of the previous time slot; the obtaining useful information from the signal based on the pre-obtained demodulation information of the previous time slot includes:

According to the channel information of the cooperative link, obtain the interference information of the first power interference signal in the previous time slot from the signal;

Restore the first power interference signal and the first cooperation signal of the previous time slot according to the interference information;

According to the demodulation information and the first power interference signal of the previous time slot, the previous time slot is demodulated. Useful information in the second power useful signal of the gap;

According to the channel information of the signal link, the channel information of the cooperative link and the first cooperative signal, detect the first power useful signal of the current time slot, and demodulate the first power useful signal of the current time slot Useful information in.

4. The method according to claim 3, characterized in that, after detecting the first power useful signal of the current time slot, further comprising:

Based on the channel information of the cooperative link, the channel information of the signal link and the first power useful signal, the useful information in the second power useful signal of the current time slot is demodulated.

5. The method according to claim 3, further comprising:

Remove the first power useful signal of the current time slot from the signal of the current time slot of the signal, and obtain the remaining signal;

The remaining signal is used as demodulation information for the next demodulation of the terminal.

6. The method according to claim 1 or 3, further comprising:

Send a signal corresponding to the first power interference information of the current time slot to the cooperative receiving end in the current time slot or the next time slot.

7. The method according to claim 1, characterized in that, when the quality of the signal link is greater than the quality of the interference link and the cooperative link, the acquisition of the demodulation information of the previous time slot The process includes:

In the previous time slot, receive a signal, where the signal includes: a useful signal and an interference signal; detect the useful information in the signal according to the channel information of the signal link;

According to the useful information, restore the useful signal;

It is determined that the remaining signal after removing the useful signal in the signal of the current time slot is demodulation information.

8. The method according to claim 7, characterized in that the signal includes:

The interference signal of the previous time slot, the interference signal of the current time slot and the second cooperation signal sent by the cooperation receiver after power conversion are sent by the interference transmitter;

Obtaining useful information from the signal based on the pre-acquired demodulation information of the previous time slot includes:

Modulate the useful information of the previous time slot and generate the useful signal of the previous time slot; Detect the useful signal of the current time slot in the signal based on the channel information of the signal link, the channel information of the interference link and the useful signal of the previous time slot;

Demodulate the useful signal of the current time slot to obtain useful information of the current time slot.

9. A signal processing device, characterized in that the cooperative link at the receiving end has the same frequency as the signal link and the interference link. The device includes:

A receiving module, configured for the receiving end to receive the signal of the current time slot, where the signal of the current time slot includes the useful signal of the current time slot and the signal corresponding to the interference information of the previous time slot;

A demodulation module, configured to obtain useful information from the signal based on the demodulation information of the previous time slot.

10. The device according to claim 9, further comprising:

A first demodulation information acquisition module, configured to: when the quality of the cooperative link is better than the quality of the signal link, and the quality of the signal link is better than the quality of the interference link, in the In the previous time slot, signals are received. The signals include: a first power useful signal, a second power useful signal, a first power interference signal and a second power interference signal. According to the channel information of the signal link at the receiving end, the reception is detected Useful information of the first power useful signal in the received signal, restore the first power useful signal based on the useful information, and determine the remaining signal in the current time slot after removing the first power useful signal The signal is demodulated information.

11. The device according to claim 10, characterized in that the demodulation module includes: a first demodulation unit, configured to obtain the first power of the previous time slot from the signal according to the channel information of the cooperative link Interference information of the signal; Restore the first power interference signal of the previous time slot and the first cooperation signal based on the interference information; Demodulate based on the demodulation information and the interference signal of the first power of the previous time slot. Detect the useful information in the second power useful signal of the previous time slot; detect the first power useful signal of the current time slot based on the channel information of the signal link, the channel information of the cooperation link and the cooperation signal , and demodulate the useful information in the first power useful signal of the current time slot.

12. The method according to claim 11, characterized in that the demodulation module is further configured to: after detecting the first power useful signal of the current time slot, according to the channel information and signal of the cooperative link The channel information of the link and the first power useful signal are used to demodulate the useful information in the second power useful signal of the current time slot.

13. The device according to claim 9, further comprising: A sending module, configured to send a signal corresponding to the first power interference information of the current time slot to the cooperative receiving end in the current time slot or the next time slot.

14. The device according to claim 9, further comprising:

The second demodulation information acquisition module is configured to receive a signal in the previous time slot when the quality of the signal link is greater than the quality of the interference link and the cooperative link, and the signal includes: useful signal and interference signal; detect the useful information in the signal based on the channel information of the signal link; restore the useful signal based on the useful information; determine the signal in the current time slot after removing the useful signal The remaining signal is the demodulated information.

15. The device according to claim 14, characterized in that the demodulation module includes: a second demodulation unit, used to modulate the useful information of the previous time slot and generate a useful signal of the previous time slot; according to the signal The channel information of the link, the channel information of the interfering link and the useful signal of the previous time slot are used to detect the useful signal of the current time slot in the signal; the useful signal of the current time slot is demodulated to obtain the current time slot useful information.

16. A communication device, characterized by including:

A wireless interface, used to receive the signal of the current time slot, the signal of the current time slot includes the useful signal of the current time slot and the signal corresponding to the interference information of the previous time slot;

A processor, configured to obtain useful information from the signal based on the demodulation information of the previous time slot.