WO2017156712A1

WO2017156712A1 - Code division multiple access demodulation method, modulation end, demodulation end and system

Info

Publication number: WO2017156712A1
Application number: PCT/CN2016/076408
Authority: WO
Inventors: 隋猛
Original assignee: 华为技术有限公司
Priority date: 2016-03-15
Filing date: 2016-03-15
Publication date: 2017-09-21

Abstract

Disclosed are a code division multiple access demodulation method, a modulation end, a demodulation end and a system. The method comprises: a demodulation end receiving a code division multiple access modulation signal sent by a modulation end; the demodulation end using a first demodulation codeword corresponding to a target receiving end and pre-stored by the demodulation end to demodulate the code division multiple access modulation signal so as to obtain an original signal, wherein the first demodulation codeword is a demodulation codeword obtained by means of a first modulation codeword, corresponding to the target sending end and sent by the modulation end, passing through a transmission channel between the modulation end and the demodulation end; and the demodulation end sending the original signal to the target receiving end. Using a first demodulation codeword carrying a transmission channel characteristic between the modulation end and the demodulation end to demodulate a code division multiple access modulation signal can restore an original signal more accurately, improve signal transmission efficiency, and have a high signal to noise ratio.

Description

Code division multiple access demodulation method, modulation end, demodulation end and system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a code division multiple access demodulation method, a modulation end, a demodulation end, and a system.

Background technique

Code Division Multiple Access (CDMA) refers to information that has a certain signal bandwidth to be transmitted, and is modulated by a modulation codeword whose bandwidth is much larger than the signal bandwidth to obtain a modulated signal, so that the original data signal is obtained. The bandwidth is extended, then modulated by the carrier and transmitted; the demodulation end demodulates using the same modulation codeword (code), and the inner bandwidth of the received bandwidth signal, and the wideband signal is replaced with the narrowband signal of the original information data. That is, despreading to achieve information communication.

However, since the actual physical line is not an ideal channel, the line has different responses to different frequency components, and the demodulation method using the above demodulation method is relatively low.

Summary of the invention

The embodiment of the invention provides a code division multiple access demodulation method, a modulation end, a demodulation end and a system, so as to improve signal transmission efficiency and improve demodulation signal to noise ratio.

In a first aspect, an embodiment of the present invention provides a code division multiple access demodulation method, including:

The demodulation end receives the code division multiple access modulation signal transmitted by the modulation end; the demodulation end demodulates the code division multiple access modulation signal by using the first demodulation code word corresponding to the target receiving end pre-stored in the demodulation end. Obtaining an original signal, where the first demodulation codeword is a demodulation codeword obtained after the first modulation codeword corresponding to the target transmission end sent by the modulation end passes the transmission channel between the modulation end and the demodulation end Finally, the demodulation end sends the demodulated original signal to the target receiving end.

The first demodulated codeword is a modulation codeword obtained after the first modulation codeword used by the modulation end modulates the code division multiple access modulation signal passes through a transmission channel between the modulation end and the demodulation end, so the first The demodulated codeword will carry the characteristics of the transmission channel between the modulation end and the demodulation end, such that when the first demodulation codeword pair carrying the characteristics of the transmission channel between the modulation end and the demodulation end is used, code division multiple access is used. When the modulated signal is demodulated, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

In a possible design, before the demodulation end receives the code division multiple access modulated signal transmitted by the modulation terminal, The above methods also include:

The demodulation end receives the first demodulation codeword sent by the modulation end, and stores the first demodulation codeword in the demodulation end corresponding to the target receiving end.

Since the communication channel between the modulation end and the demodulation end may change during the communication process, the training phase corresponding to the target receiving end is stored at the demodulation end during the training phase of each communication between the modulation end and the demodulation end. The channel characteristic of the communication channel between the modulation end and the demodulation end first demodulates the codeword, so that the demodulation using the first demodulation codeword in the formal communication phase can accurately restore the original signal.

In a possible design, the above method further includes:

The demodulation end receives the first demodulation codeword sent by the modulation terminal at least twice; and calculates an average first demodulation codeword corresponding to the target receiving end according to the at least two received first demodulation codewords;

The demodulation end demodulates the code division multiple access modulated signal by using the pre-stored first demodulated codeword corresponding to the target receiving end to obtain an original signal. The specific implementation manner is as follows:

The demodulation end demodulates the code division multiple access modulated signal by using the average first demodulation codeword to obtain an original signal. Therefore, it is more accurate to demodulate and restore the original signal, and reduce the influence of white Gaussian noise.

In a second aspect, an embodiment of the present invention provides a code division multiple access demodulation method, including:

The modulation end sends a first modulation codeword corresponding to the target transmitting end to the demodulation end; the first modulation codeword passes the transmission channel between the modulation end and the demodulation end to obtain a first demodulation codeword, and the first solution The code word is a demodulation code used by the demodulation end to demodulate the code division multiple access modulation signal from the modulation end; the modulation end uses the first modulation code word to perform code division multiple access modulation on the original signal to obtain the above code division. The address modulation signal; finally, the modulation end transmits the code division multiple access modulation signal to the demodulation end.

In a third aspect, an embodiment of the present invention provides a code division multiple access demodulation method, including:

The modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal; wherein the target modulation codeword is a second modulation codeword corresponding to the target transmitting end a product of precoding coefficients; then the modulation end transmits the code division multiple access modulation signal to the demodulation end number.

The target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient, so that the target modulation codeword carries a channel characteristic of a transmission channel between the modulation end and the demodulation end, so when used When the target modulation code word performs CDMA modulation on the original signal to obtain a CDMA signal and transmits it to the demodulation end, the demodulation end can demodulate the original signal by using the conventional method, and more accurately restore the original signal, thereby improving signal transmission efficiency. The signal to noise ratio is high.

In a possible design, before the modulation end performs code division multiple access modulation on the original signal by using the target modulation codeword corresponding to the target transmitting end to obtain the code division multiple access modulated signal, the method further includes:

The modulation end sends a second modulation codeword corresponding to the target transmitting end to the demodulating end; and receives a value of a chip of the second demodulated codeword corresponding to the target receiving end returned by the demodulating end; wherein the second solution The codeword is a demodulated codeword obtained after the second modulation codeword sent by the modulation end passes the transmission channel between the modulation end and the demodulation end; finally, the precoding coefficient is calculated in the modulation end, wherein the precoding The coefficient is the ratio of the second modulation codeword to the second demodulation codeword. Thereby, the precoding system can be multiplied by the second modulation codeword to obtain the target modulation codeword.

In a possible design, the modulation end sends a second modulation codeword corresponding to the target transmitting end to the demodulating end; and modulates the chip of the second demodulated codeword corresponding to the target receiving end returned by the demodulating end. The specific implementation of the value is:

The modulation end transmits the second modulation codeword corresponding to the target transmitting end to the demodulating end at least twice; and the modulation end receives the chip of the second demodulated codeword corresponding to the target receiving end returned by the demodulating end at least twice. The method further includes: calculating, according to the at least two received second demodulated codewords, an average second demodulated codeword corresponding to the target receiving end; and calculating the precoding coefficient, the precoding The coefficient is a ratio of the ratio of the second modulation codeword to the second demodulation codeword: calculating the precoding coefficient, where the precoding coefficient is the second modulation codeword and the average second demodulation codeword ratio. The precoding coefficient is calculated by averaging the second demodulated codeword and used for modulation at the modulation end, so that the demodulation end restores the original signal more accurately, thereby reducing the influence of white Gaussian noise.

In a possible design, the modulation end sends a second modulation codeword corresponding to the target transmitting end to the demodulating end. The modulation end transmits the second modulation corresponding to the target transmitting end to the demodulating end at least twice. Codeword;

The modulation end receives the value of the chip of the second demodulated codeword corresponding to the target receiving end returned by the demodulation end The specific implementation manner is: receiving a value of a chip of an average second demodulation codeword returned by the demodulation end; wherein the average second demodulation codeword is the second demodulation received by the demodulation terminal at least twice The average value of the codeword;

The modulation end calculates a precoding coefficient, and the precoding coefficient is a ratio of the ratio of the second modulation codeword to the second demodulation codeword. The demodulation end calculates the precoding coefficient, where the precoding coefficient is The ratio of the second modulation codeword to the average second demodulation codeword. The precoding coefficient is calculated by averaging the second demodulated codeword and used for modulation at the modulation end, so that the demodulation end restores the original signal more accurately, thereby reducing the influence of white Gaussian noise.

In a fourth aspect, an embodiment of the present invention provides a code division multiple access demodulation method, where the method includes:

The demodulation end receives a second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is sent by the modulation end to the second modulation codeword corresponding to the target transmitting end, between the modulation end and the demodulation end a demodulated codeword obtained after transmitting the channel; the demodulating end transmits the value of the chip of the second demodulated codeword to the modulation end; and the demodulating end receives the code division multiple access modulated by the modulation terminal using the target modulation codeword a modulation signal, the target modulation codeword is a product of a second modulation codeword corresponding to a target transmitting end and a precoding coefficient; and the demodulating end finally uses the second modulation codeword to demodulate the code division multiple access modulated signal. original signal.

In a possible design, the method further includes: the demodulating end receiving the second demodulated codeword corresponding to the target receiving end at least twice; and the demodulating end recalculating the at least two received second demodulated codewords Average of the average demodulated codeword;

The specific implementation manner in which the demodulation end transmits the value of the chip of the second demodulated codeword to the modulation end is that the demodulation end transmits the value of the chip of the average second demodulated codeword to the modulation end.

In a fifth aspect, an embodiment of the present invention provides a demodulation end, including a module for performing the method in the first aspect of the present invention.

In a sixth aspect, an embodiment of the present invention provides a modulation end, including a module for performing the method in the second aspect of the present invention.

In a seventh aspect, an embodiment of the present invention provides a modulation end, including a module for performing the method in the third aspect of the present invention.

In an eighth aspect, an embodiment of the present invention provides a demodulation end, including a module for performing the method in the fourth aspect of the present invention.

According to a ninth aspect, an embodiment of the present invention provides a demodulation end, where the demodulation end includes a processor, and the processor is configured to support the demodulation end to perform a code division multiple access demodulation method provided by the first aspect. Corresponding The function. The demodulation terminal can also include a memory for coupling with the processor that holds the program instructions and data necessary for the demodulation terminal. The demodulation end can also include a communication interface for the demodulation end to communicate with other devices or communication networks.

According to a tenth aspect, an embodiment of the present invention provides a modulation end, where the demodulation end includes a processor, and the processor is configured to support the modulation end to perform a corresponding method in a code division multiple access demodulation method provided by the second aspect. Features. The modulation terminal can also include a memory for coupling with the processor that holds the program instructions and data necessary for the modulation terminal. The modulation terminal can also include a communication interface for the modulation terminal to communicate with other devices or communication networks.

In an eleventh aspect, an embodiment of the present invention provides a modulation end, where the demodulation end includes a processor, and the processor is configured to support the modulation end to perform a corresponding method in a code division multiple access demodulation method provided by the third aspect. The function. The modulation terminal can also include a memory for coupling with the processor that holds the program instructions and data necessary for the modulation terminal. The modulation terminal can also include a communication interface for the modulation terminal to communicate with other devices or communication networks.

According to a twelfth aspect, an embodiment of the present invention provides a demodulation end, where the demodulation end includes a processor, and the processor is configured to support the demodulation end to perform a code division multiple access demodulation method provided by the fourth aspect. The corresponding function. The modulation terminal can also include a memory for coupling with the processor that holds the program instructions and data necessary for the demodulation terminal. The demodulation end can also include a communication interface for the demodulation end to communicate with other devices or communication networks.

According to a thirteenth aspect, the embodiment of the present invention provides a computer storage medium for storing computer software instructions for the demodulation end provided by the ninth aspect, which includes a program designed to execute the above aspects.

In a fourteenth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the modulation terminal provided by the above tenth aspect, which includes a program designed to perform the above aspects.

In a fifteenth aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the modulation end provided in the eleventh aspect, which includes a program designed to execute the above aspects.

In a sixteenth aspect, the embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the demodulation end provided in the twelfth aspect, which is configured to perform the foregoing aspects. Program.

In a seventeenth aspect, an embodiment of the present invention provides a code division multiple access demodulation system, where the system includes:

The demodulation end provided by the fifth aspect of the embodiment of the present invention and the modulation end provided by the sixth aspect of the embodiment of the present invention;

Or the modulation end provided by the seventh aspect of the embodiment of the present invention and the demodulation end provided by the eighth aspect of the embodiment of the present invention.

In some possible implementation manners, the specific implementation manner in which the modulation end sends the first modulation codeword corresponding to the target transmitting end to the demodulation end is:

The modulation end serially transmits the first modulation codeword corresponding to the target transmitting end to the demodulating end, or the modulation end transmits the first modulation codeword corresponding to the target transmitting end to the demodulating end frequency division. Therefore, the modulation end separately transmits the first modulation codewords corresponding to the different target transmitting ends to the demodulation end.

In some possible implementation manners, the specific implementation manner in which the modulation end sends the second modulation codeword corresponding to the target transmitting end to the demodulation end is:

The modulation end serially transmits a second modulation codeword corresponding to the target transmitting end to the demodulating end, or the modulation end transmits the second modulation codeword corresponding to the target transmitting end to the demodulating end frequency division. Therefore, the modulation end can independently transmit the second modulation codeword corresponding to the different target transmitting end to the demodulation end.

In the embodiment of the present invention, after the demodulation end receives the code division multiple access modulation signal sent by the modulation end, the first demodulation codeword corresponding to the target receiving end pre-stored by the demodulation end is used to the code division multiple access modulation signal. Demodulation is performed to obtain the original signal, and the original signal is sent to the target receiving end. Compared with the prior art, since the first demodulation codeword is a modulation obtained by the modulation terminal modulating the code division multiple access modulation signal, the first modulation codeword is modulated by the transmission channel between the modulation end and the demodulation end. a codeword, so the first demodulated codeword will carry a transmission channel characteristic between the modulation end and the demodulation end, thereby using the first demodulation carrying the characteristics of the transmission channel between the modulation end and the demodulation end When the codeword demodulates the code division multiple access modulation signal, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal to noise ratio is high.

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 Some embodiments of the present invention, for those of ordinary skill in the art, do not pay Other drawings can also be obtained from these drawings on the premise of creative labor.

FIG. 1 is a structural diagram of a CDMA fixed network system according to an embodiment of the present invention;

FIG. 1 is a schematic flowchart of a first embodiment of a code division multiple access demodulation method according to an embodiment of the present disclosure;

2 is a schematic flowchart diagram of a second embodiment of a code division multiple access demodulation method according to an embodiment of the present invention;

3 is a schematic flow chart of a third embodiment of a code division multiple access demodulation method according to an embodiment of the present invention;

4 is a schematic flowchart diagram of a fourth embodiment of a code division multiple access demodulation method according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart diagram of a fifth embodiment of a code division multiple access demodulation method according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic flowchart diagram of a sixth embodiment of a code division multiple access demodulation method according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart diagram of a seventh embodiment of a code division multiple access demodulation method according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart diagram of an eighth embodiment of a code division multiple access demodulation method according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a first embodiment of a demodulation end according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a second embodiment of a demodulation end according to an embodiment of the present disclosure;

11 is a schematic structural diagram of a first embodiment of a modulation end according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a second embodiment of a modulation end according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a third embodiment of a modulation end according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a third embodiment of a demodulation end according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of a fourth embodiment of a demodulation end according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of a fifth embodiment of a demodulation end according to an embodiment of the present disclosure;

17 is a schematic structural diagram of a fourth embodiment of a modulation end according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a code division multiple access demodulation system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. Some embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present invention are used to distinguish different objects, and are not intended to describe a specific order. . Furthermore, the terms "comprises" and "comprising" and "comprising" are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, products or equipment.

References to "an embodiment" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention. The appearances of the phrases in various places in the specification are not necessarily referring to the same embodiments, and are not exclusive or alternative embodiments that are mutually exclusive. Those skilled in the art will understand and implicitly understand that the embodiments described herein can be combined with other embodiments.

Referring to FIG. 1-a, FIG. 1-a is a structural diagram of a CDMA fixed network system according to an embodiment of the present invention. The code division multiple access demodulation method provided by the embodiment of the present invention is implemented based on the CDMA fixed network system. In the structure diagram of the CDMA fixed network system shown in FIG. 1-a, the transmitting side and the receiving side are included, and the transmitting side includes each user sending end and a modulation end, wherein the user sending end is used to send user data, and the modulation end is used to be used. Performing code division multiple access modulation on the user data sent by the sending end of each user to obtain a code division multiple access modulated signal, and transmitting to the receiving side through a channel line between the transmitting side and the receiving side; the receiving side includes a demodulating end and The user receiving end, the demodulating end is used to receive the code division multiple access modulated signal and then demodulated, and then sent to each user receiving end. Specifically, code 1, code 2, code 3, and code n are sequences orthogonal to each other, and data transmitted by each user's transmitting end is multiplied by a code (modulation code word) to implement modulation, and the obtained sequence is superimposed. Get up and send it on the same line; On the receiving side, the received signal is internally coded with its corresponding code (demodulated codeword) to obtain the data transmitted by the transmitting side. In the embodiment of the present invention, the communication channel between the transmitting side and the receiving side may be a Passive Optical Network (PON), and both the transmitting end of the transmitting side and the demodulating end of the receiving side may be the central office. The optical line terminal (OLT) of the side device, the user transmitting end of the transmitting side, and the user receiving end of the receiving side can be the optical network unit (OUN) of the user side device.

In the conventional CDMA system, the above codes are sequences of 1 and -1. That is to say, the sequence used by the transmitting side for CDMA modulation is composed of 1 and -1, and the sequence used for demodulation by the receiving side is also composed of 1 and -1, but the actual physical line is not an ideal channel. The line has different responses to different frequency components, so after the transmitted signal passes through the actual physical line, the modulated code feature is no longer a strict sequence of 1 and -1, while the traditional CDMA demodulation is still strictly used. The code of the 1 and -1 sequences is demodulated. Due to poor correlation, the demodulated signal power is low and the signal-to-noise ratio is low.

Referring to FIG. 1-b, FIG. 1-b is a schematic flowchart of a first embodiment of a code division multiple access demodulation method according to an embodiment of the present invention.

As shown in FIG. 1-b, the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S101. The demodulation end receives the code division multiple access modulation signal sent by the modulation end.

The code division multiple access modulation signal (CDMA signal) is a signal that includes each user data obtained by performing code division multiple access modulation on user data sent by each user's transmitting end.

In the first embodiment of the present invention, the CDMA signal is a CDMA signal obtained by modulating user data using a modulation codeword of a sequence of 1 and -1 at the modulation end.

S102. The demodulation end demodulates the code division multiple access modulation signal by using a first demodulation codeword corresponding to the target receiving end pre-stored by the demodulation end to obtain an original signal, where the first signal is used. The demodulated codeword is a demodulated codeword obtained after the first modulation codeword corresponding to the target transmitting end that is sent by the modulation terminal passes through a transmission channel between the modulation end and the demodulation end.

In the embodiment of the present invention, the first modulation codeword refers to a modulation codeword used by the modulation end to modulate user data, and the first modulation codeword is a strict 1 and -1 sequence.

The original signal refers to the original signal sent by the user transmitting end in the transmitting side, and reflected to the receiving side, the original signal is CDMA modulated to obtain a CDMA signal and sent to the receiving side, and demodulated by The demodulated signal is sent to the user receiving end after demodulating the CDMA signal, and the demodulated signal is a signal similar to the original signal; in the embodiment of the present invention, the demodulated signal is collectively referred to as the original signal.

The target transmitting end refers to the user transmitting end on the transmitting side, so that when the modulation end modulates the original signal, there is a first modulation codeword corresponding to the target transmitting end, and the target receiving end refers to the receiving end of the user on the receiving side, thereby When the demodulation end demodulates the CDMA signal, there is a first demodulation codeword corresponding to the target receiving end, and there is a one-to-one correspondence between the target transmitting end and the target receiving end, that is, a target transmitting end sends out The signal is ultimately received by the corresponding target receiver.

In the embodiment of the present invention, the first demodulation codeword carries a modulation codeword with a transmission channel feature between the modulation end and the demodulation end, and the transmission channel between the modulation end and the demodulation end is a non-ideal transmission. Channel, so the first demodulation codeword obtained by the first modulation codeword after passing through the transmission channel between the modulation end and the demodulation end will have a strong correlation with the first modulation codeword, but not with the first The modulation codewords have exactly the same sequence of 1 and -1; and the code division multiple access modulation signal passes through the transmission channel between the modulation terminal and the demodulation terminal, so that the signal therein also carries the modulation terminal and the demodulation terminal. The characteristics of the transmission channel such that when the code division multiple access modulated signal is demodulated using the first demodulated codeword, the error between the demodulated signal and the original signal is small.

In the embodiment of the present invention, the first demodulation codeword is a modulation codeword pre-stored at the demodulation end in a training phase in which the modulation end communicates with the demodulation end.

S103. The demodulation end sends the original signal to the target receiving end.

It can be understood that the original signal is obtained after demodulating the code division multiple access modulated signal by using the first modulation codeword, and the demodulation end sends the original signal to the corresponding user receiving end.

It can be seen that, in the solution of this embodiment, after receiving the code division multiple access modulation signal sent by the modulation end, the demodulation end uses the first demodulation code word corresponding to the target receiving end pre-stored by the demodulation end. The divided multiple access modulated signal is demodulated to obtain an original signal, and the original signal is sent to the target receiving end. The first demodulated codeword is a modulation codeword obtained after the first modulation codeword used by the modulation end modulates the code division multiple access modulation signal passes through a transmission channel between the modulation end and the demodulation end, so the first The demodulated codeword will carry the characteristics of the transmission channel between the modulation end and the demodulation end, such that when the first demodulation codeword pair carrying the characteristics of the transmission channel between the modulation end and the demodulation end is used, code division multiple access is used. When the modulated signal is demodulated, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

Optionally, in some possible implementation manners of the present disclosure, the demodulating end receives the modulation end and sends the Before the code division multiple access modulation signal, the method further includes:

Receiving, by the modulation end, the first demodulation codeword;

And storing the first demodulated codeword corresponding to the target receiving end.

In the embodiment of the present invention, the first demodulation codeword corresponding to the target receiving end is received, and the first demodulated codeword is stored according to the target receiving end, and the training of each communication between the modulation end and the demodulating end occurs. The phase can be performed each time the modulation end and the demodulation end re-establish communication.

Optionally, in some possible implementation manners of the present invention, storing the first demodulation codeword according to the target receiving end, including:

When the modulation end time serially transmits the first demodulation codeword, it corresponds to each target transmission end according to a time series, thereby correspondingly storing the first demodulation codeword corresponding to the target receiving end.

Optionally, in another possible implementation manner of the present invention, storing the first demodulation codeword according to the target receiving end, including:

When the modulation end frequency division transmits the first demodulation codeword, it corresponds to each target transmission end according to the frequency point, thereby correspondingly storing the first demodulation codeword corresponding to the target receiving end.

It can be understood that, since the communication channel between the modulation end and the demodulation end may change during the communication process, the communication stage of the communication between the modulation end and the demodulation end corresponds to the target receiving end at the demodulation end. a first demodulation codeword, the first demodulation codeword carrying a channel characteristic of a communication channel between the modulation end and the demodulation end, so that the demodulation can be performed by using the first demodulation codeword in a later formal communication phase The original signal is accurately restored.

Optionally, in some possible implementation manners of the present invention, the method further includes:

Receiving the first demodulated codeword sent by the modulation terminal at least twice;

Calculating, according to the at least two received first demodulation codewords, an average first demodulation codeword corresponding to the target receiving end;

The demodulating end demodulates the code division multiple access modulated signal by using a first demodulated codeword corresponding to the target receiving end pre-stored by the demodulating end to obtain an original signal corresponding to the target receiving end, include:

The demodulation end demodulates the code division multiple access modulated signal by using the average first demodulation codeword to obtain an original signal.

Further, in some possible implementation manners of the present invention, the demodulating end receives the device at least twice When the first demodulation codeword is sent by the modulation end, the modulation end may send the first demodulation codeword multiple times by the demodulation end, or may be sent by the modulation end. After the first modulation codeword, the demodulation end receives the first demodulation codeword, the modulation end sends the first modulation codeword, and the demodulation end receives the first demodulation codeword, and finally the demodulation end will have at least two The first demodulated codeword is received a second time.

It can be understood that the average first demodulated codeword is calculated by receiving the first demodulated codeword at least twice, and the average first demodulated codeword can carry the channel feature more accurately, so that when the average first demodulated codeword pair is utilized The code division multiple access modulation signal is demodulated to obtain the original signal, which will be more accurate and reduce the influence of white Gaussian noise.

Referring to FIG. 2, FIG. 2 is a schematic flowchart diagram of a second embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 2, the second embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S201. The demodulation end receives a first demodulation codeword corresponding to the target receiving end.

The first demodulation codeword is a modulation codeword obtained after the first modulation codeword corresponding to the target transmitting end sent by the modulation end passes the transmission channel between the modulation end and the demodulation end.

S202. Store the first demodulated codeword according to a target receiving end.

S203. The demodulation end receives the code division multiple access modulation signal sent by the modulation end.

Optionally, in some possible implementation manners of the present invention, when the demodulation end receives the code division multiple access modulated signal sent by the modulation end, the method includes:

The demodulation terminal receives the first demodulation codeword at least twice.

S204. The demodulation end demodulates the code division multiple access modulation signal by using a first demodulation codeword corresponding to the target receiving end pre-stored by the demodulation end to obtain an original signal.

S205. The demodulation end sends the original signal to the target receiving end.

Steps S203 to S205 of the second embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention are the same as steps S101 and S103 of the first embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention. , will not repeat them here.

It can be seen that, in the solution of this embodiment, after receiving the code division multiple access modulation signal sent by the modulation end, the demodulation end uses the first demodulation code word corresponding to the target receiving end pre-stored by the demodulation end. The divided multiple access modulated signal is demodulated to obtain an original signal, and the original signal is sent to the target receiving end. The first modulation codeword used when the first demodulation codeword is a modulation terminal modulating the code division multiple access modulation signal a modulation codeword obtained after a transmission channel between the modulation end and the demodulation end, so the first demodulation codeword will carry a transmission channel characteristic between the modulation end and the demodulation end, so that when the modulation terminal is used When the first demodulated codeword of the transmission channel characteristic between the demodulation end demodulates the code division multiple access modulation signal, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal to noise ratio is high.

A code division multiple access demodulation method according to an embodiment of the present invention, a code division multiple access demodulation method includes: a modulation end transmitting a first modulation codeword corresponding to a target transmitting end to a demodulation end; the first modulation And obtaining, by the codeword, a first demodulation codeword after the transmission channel between the modulation end and the demodulation end, where the first demodulation codeword is a demodulation end demodulating a code segment from the modulation end a demodulation codeword used by the multiple access modulated signal; performing code division multiple access modulation on the original signal using the first modulation codeword to obtain the code division multiple access modulated signal; and transmitting the code division to the demodulation end Multiple access modulated signals.

Referring to FIG. 3, FIG. 3 is a schematic flowchart diagram of a third embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 3, the third embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S301. The modulation end sends a first modulation codeword corresponding to the target transmitting end to the demodulation end. The first modulation codeword obtains the first demodulation after passing the transmission channel between the modulation end and the demodulation end. And a codeword, wherein the first demodulation codeword is a demodulation codeword used by the demodulation terminal to demodulate a code division multiple access modulated signal from the modulation terminal.

In the embodiment of the present invention, when the modulation end sends the first modulation codeword to the demodulation end, each of the first modulation codewords corresponding to the target transmission end can be separately transmitted, so that the first modulation is received at the demodulation end. When the code word is used, it can also be received corresponding to the target receiving end.

Specifically, the modulation end sends the first modulation codeword corresponding to the target sending end to the demodulating end, including:

Transmitting, by the modulation end, the first modulation codeword corresponding to the target transmitting end to the demodulation end in time series;

Or the modulation end frequency-transmitting the first modulation codeword corresponding to the target transmitting end to the demodulation end.

It can be understood that transmitting the first modulation codeword corresponding to the target transmitting end by time division serial or frequency division will enable each modulation codeword to be transmitted separately according to the target transmitting end.

In the embodiment of the present invention, the modulation end sends a first modulation code corresponding to the target transmitting end to the demodulating end. The word occurs during the training phase in which the modulation end communicates with the demodulation side.

Further, in order to obtain a more accurate first demodulation codeword and reduce the influence of white Gaussian noise, the modulation end transmits the first modulation codeword to the demodulation end multiple times during the training phase.

S302. Perform code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access modulation signal.

S303. Send the code division multiple access modulation signal to the demodulation end.

Referring to FIG. 4, FIG. 4 is a schematic flowchart diagram of a fourth embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 4, the fourth embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S401. The modulation end sends, to the demodulation end, a first modulation codeword corresponding to the target transmitting end.

The first modulation codeword is obtained by the transmission channel between the modulation end and the demodulation end to obtain a first demodulation codeword, and the first demodulation codeword is a demodulation end demodulating the code division multiple access modulation signal from the modulation end. The modulation code word used.

S402. The demodulation end receives a first demodulation codeword corresponding to the target receiving end.

Further, in order to obtain a more accurate first demodulation codeword, the demodulation terminal receives the first demodulation codeword at least twice, thereby reducing the influence of Gaussian white noise.

S403. The demodulation end stores the first demodulation codeword according to the target receiving end.

Further, the demodulation end calculates an average first demodulation codeword corresponding to the target receiving end according to the at least two received first demodulation codewords, and presses the average first demodulation codeword according to the target receiving end. Correspondingly stored on the demodulation side.

S404. The demodulation end receives the code division multiple access modulated signal sent by the modulation end.

S405. The demodulation end demodulates the code division multiple access modulation signal by using a first demodulation codeword corresponding to the target receiving end pre-stored by the demodulation end to obtain an original signal.

Optionally, in some possible implementation manners of the present disclosure, when an average first demodulated codeword corresponding to the target receiving end is stored in the demodulating end, the demodulating end uses the average first demodulated codeword pair. The code division multiple access modulated signal is demodulated to obtain the original signal.

S406. The demodulation end sends the original signal to the target receiving end.

The steps of the third embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention are the same as those of the first embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention, and details are not described herein again.

A code division multiple access demodulation method according to an embodiment of the present invention, a code division multiple access demodulation method includes: a modulation end performs code division multiple access modulation on a original signal by using a target modulation codeword corresponding to a target transmitting end to obtain a code And dividing the multiple access modulation signal; the target modulation codeword is a product of a second modulation codeword corresponding to the target receiving end and a precoding coefficient; and the modulation end transmits the code division multiple access modulation signal to the demodulation end.

Referring to FIG. 5, FIG. 5 is a schematic flowchart diagram of a fifth embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 5, the fifth embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S501. The modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal. The target modulation codeword is a second modulation codeword corresponding to the target receiving end. The product of the precoding coefficient.

Wherein, the second modulation codeword is when the modulation end performs CDMA modulation on the original signal in a conventional manner. The strict 1 and -1 sequence modulation codewords used, when the CDMA signal obtained by modulating the original signal using the second modulation codeword is sent to the demodulation end, since the transmission channel is not ideal, the demodulation terminal is Demodulating the CDMA signal using a strict 1 and -1 sequence of modulation code words will result in a low signal to noise ratio of the recovered signal.

Wherein, the target modulation codeword refers to the channel characteristic between the modulation end and the demodulation end, and is used to demodulate the conventional strict 1 and -1 sequence modulation codewords at the demodulation end to obtain an accurate original signal. The modulation codeword used at the modulation end is understood to be that the target modulation codeword is a modulation codeword carrying a channel characteristic between the modulation end and the demodulation end;

The precoding coefficient refers to a coefficient of the communication channel characteristic carried by the modulation end and the demodulation end calculated at the training stage when the modulation end and the demodulation end communicate, and a coefficient for correcting the second modulation code word, Therefore, when the coefficient is multiplied by the second modulation codeword, the target modulation codeword carrying the channel characteristic between the modulation end and the demodulation end is obtained.

In the embodiment of the present invention, the target modulation codeword is also pre-stored on the modulation end during the training phase when the modulation end and the demodulation end communicate, so that the target modulation codeword pair can be used when the modulation end and the demodulation end normally communicate. The original signal is CDMA modulated to obtain a CDMA modulated signal.

S502. The modulation end sends the code division multiple access modulation signal to a demodulation end.

It can be seen that, in the solution of this embodiment, the modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal, and the code division multiple access modulation signal is obtained. Sending to the demodulation end to enable the demodulation end to demodulate the code divisional multiple access modulated signal in a conventional manner to obtain an original signal, the target modulation codeword being a second modulation codeword corresponding to the target transmitting end and precoding a product of coefficients, such that the target modulation codeword carries a channel characteristic of a transmission channel between the modulation end and the demodulation end, so that when the original signal is CDMA modulated using the target modulation codeword to obtain a CDMA signal and transmitted to the demodulation end When the demodulation end demodulates the CDMA by the conventional method, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal to noise ratio is high.

Optionally, in some possible implementation manners of the present disclosure, before the modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, the method Also includes:

Transmitting, by the modulation end, a second modulation codeword corresponding to the target sending end to the demodulation end;

Receiving, by the demodulation end, a chip of a second demodulation codeword corresponding to the target receiving end The second demodulation codeword is a demodulated codeword obtained after the second modulation codeword sent by the modulation end passes through a transmission channel between the modulation end and the demodulation end;

The precoding coefficient is calculated, and the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword.

In the embodiment of the present invention, the foregoing steps are completed in a training phase when the modulation end communicates with the demodulation end, and may be performed each time the modulation end and the demodulation end re-establish communication.

The second demodulated codeword refers to a non-strictive 1 and -1 sequence carrying the characteristics of the modulation end and the demodulation end channel.

For example, in some possible implementation manners of the present invention, if the second modulation codeword is (1, -1, 1, 1), after the modulation channel and the transmission channel of the demodulation end, the second demodulation codeword It becomes (0.9, -0.8, 0.85, 0.95), and the value of the chip of the second demodulated codeword is the respective values of the second demodulated codeword, that is, 0.9, -0.8, 0.85, and 0.95.

Specifically, when the modulation end calculates the precoding coefficient, the ratio of the second modulation codeword to the second demodulation codeword is calculated by using the value of each chip of the second demodulation codeword returned by the received demodulation end.

Specifically, in another possible implementation manner of the present invention, if the second modulation codeword Ct is (1, -1, 1, 1), after passing through the transmission channel of the modulation end and the demodulation end, The second demodulation codeword Cr becomes (0.9, -0.8, 0.85, 0.95), and when the demodulation end returns the value of each chip of the second demodulated codeword to the modulation end, the modulation terminal will receive each value. 0.9, -0.8, 0.85, 0.95. The precoding coefficient coef is coef=Ct/Cr, that is, (1/0.9, -1/-0.8, 1/0.85, 1/0.95), so that the target modulation codeword is Ct*coef, that is, Ct*Ct. /Cr, and since the coefficient of variation of the target modulation codeword will be Cr/Ct during channel transmission, the target modulation codeword will be changed again after being transmitted from the modulation end to the demodulation end according to the original channel. (Ct*Ct/Cr)*(Cr/Ct)=Ct, so that the original signal can be accurately restored when the demodulation end continues to use the second modulation codeword Ct for demodulation.

Optionally, in some possible implementation manners of the present disclosure, the transmitting end sends, to the demodulating end, a second modulation codeword corresponding to the target sending end, including:

Transmitting, by the modulation end, the second modulation codeword corresponding to the target transmitting end to the demodulation end in time series;

Or the modulation end frequency-distributes the second modulation codeword corresponding to the target transmitting end to the demodulation end.

It can be understood that transmitting the second modulation codeword corresponding to the target transmitting end by time division serial or frequency division will enable each modulation codeword to be separately transmitted according to the target transmitting end, thereby enabling the second demodulation received by the demodulating end. The codewords are distinguished according to the target receiving end, so that the finally obtained precoding coefficients can also be distinguished according to the target transmitting end.

Optionally, in some possible implementation manners of the present disclosure, the modulation end sends a second modulation codeword corresponding to the target sending end to the demodulating end, and receives the The value of the chip of the second demodulation codeword corresponding to the target receiving end includes:

Transmitting, by the modulation end, the second modulation codeword corresponding to the target transmitting end to the demodulating end at least twice; receiving the second solution corresponding to the target receiving end returned by the demodulating end at least twice The value of the chip of the codeword; the method further includes:

Calculating, according to the at least two received second demodulation codewords, an average second demodulation codeword corresponding to the target receiving end;

Calculating the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword, and includes:

The precoding coefficient is calculated, and the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword.

Optionally, in some possible implementation manners of the present disclosure, the modulation end sends a second modulation codeword corresponding to the target sending end to the demodulating end;

Transmitting, by the modulation end, the second modulation codeword corresponding to the target sending end to the demodulation end at least twice;

And receiving, by the demodulation end, a value of a chip of a second demodulation codeword corresponding to the target receiving end, where:

Receiving, by the demodulation end, a value of a chip of the average second demodulation codeword; the average second demodulation codeword being the second demodulation received by the demodulation terminal at least twice The average value of the codeword;

Calculating the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword, including:

It can be understood that the second modulation codeword is transmitted multiple times at the modulation end, and the demodulation end receives the plurality of times. Demodulating the codeword to calculate an average second demodulated codeword, and calculating the precoding coefficient by using the average second demodulated codeword to modify the second modulation codeword to obtain a target modulation codeword, which will enable the target modulation to be utilized After the codeword modulates the original signal to obtain the CDMA signal and transmits it to the demodulation end, the original signal obtained by the demodulation end using the conventional method for demodulation and reduction is more accurate, and the influence of the white Gaussian noise is reduced.

It can be understood that the average second demodulation codeword can be calculated by the modulation end, or the average second demodulation codeword can be calculated by the demodulation end, and the effects obtained by the two methods are consistent.

Referring to FIG. 6, FIG. 6 is a schematic flowchart diagram of a sixth embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 6, the sixth embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S601. The modulation end sends a second modulation codeword corresponding to the target sending end to the demodulation end.

S602. Receive a value of a chip of a second demodulation codeword corresponding to the target receiving end returned by the demodulation end.

The second demodulation codeword is a modulation codeword obtained after the second modulation codeword sent by the modulation end passes the transmission channel between the modulation end and the demodulation end.

S603. Calculate a precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword.

Optionally, in some possible implementation manners of the present invention, the ratio of the second modulation codeword to the second demodulation codeword may be directly calculated.

Optionally, in other possible implementation manners of the present invention, the ratio of the second modulation codeword to the second demodulation codeword may be calculated by using other calculation methods.

S604. The modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal; the target modulation codeword is an original modulation codeword and a pre-corresponding to the target transmitting end. The product of the coding coefficients.

S605. The modulation end sends the code division multiple access modulation signal to the demodulation end.

The steps of the fifth embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention are the same as those of the fourth embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention, and details are not described herein again.

It can be seen that, in the solution of this embodiment, the modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal, and the code division multiple access modulation signal is obtained. Sending to the demodulation end so that the demodulation end enters the code division multiple access modulation signal in a conventional manner Demodulating to obtain an original signal, the target modulation codeword is a product of a second modulation codeword corresponding to a target transmitting end and a precoding coefficient, so that the target modulation codeword carries a transmission channel between the modulation end and the demodulation end. Channel characteristics, such that when the original signal is CDMA modulated using the target modulation codeword to obtain a CDMA signal and sent to the demodulation end, the demodulation end can more accurately restore the original signal when the CDMA uses the conventional method for demodulation Improve signal transmission efficiency and high signal-to-noise ratio.

A code division multiple access demodulation method according to an embodiment of the present invention, a code division multiple access demodulation method includes: a demodulation end receives a second demodulation codeword corresponding to a target receiving end, and the second demodulation code The word is a demodulated codeword obtained after the second modulation codeword corresponding to the target transmitting end sent by the modulation end passes the transmission channel between the modulation end and the demodulation end; and sends the demodulation codeword to the modulation end a value of a chip of the second demodulated codeword; receiving a code division multiple access modulated signal modulated by the modulation terminal and using a target modulation codeword, where the target modulation codeword is a corresponding to the target transmitting end And a product of the second modulation codeword and the precoding coefficient; and demodulating the code division multiple access modulation signal by using the second modulation codeword to obtain an original signal.

Referring to FIG. 7, FIG. 7 is a schematic flowchart diagram of a seventh embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 7, the seventh embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S701. The demodulation end receives a second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is a second modulation codeword that is sent by the modulation end and corresponds to the target sending end, and passes through the modulation end. A demodulated codeword obtained after a transmission channel with the demodulation end.

S702. Send a value of a chip of the second demodulation codeword to the modulation end.

S703. Receive a code division multiple access modulated signal modulated by a target modulation codeword sent by a modulation end, where the target modulation codeword is a product of a second modulation codeword corresponding to a target transmitting end and a precoding coefficient.

S704. Demodulate the code division multiple access modulated signal by using the second modulation codeword to obtain an original signal.

Receiving, by the demodulation end, the second demodulation codeword corresponding to the target receiving end at least twice;

Calculating an average value of the at least two received second demodulation codewords to obtain an average second demodulation codeword;

Transmitting, by the modulation end, a value of a chip of the second demodulation codeword, including:

Transmitting, to the modulation terminal, a value of a chip of the average second demodulated codeword.

It can be understood that by receiving the second demodulated codeword multiple times and calculating the average second demodulated codeword, Returning the value of the chip of the average second demodulated codeword to the modulation end, so that the modulation end calculates the precoding coefficient by using the value of the chip of the average second demodulated codeword, which will make the precoding coefficient more accurate Carrying the channel characteristics, the modulation of the original signal by the subsequent modulation end and the demodulation of the original signal by the demodulation end are more accurate, and the influence of the white Gaussian noise is reduced.

Referring to FIG. 8, FIG. 8 is a schematic flowchart diagram of an eighth embodiment of a code division multiple access demodulation method according to an embodiment of the present invention. As shown in FIG. 8, the eighth embodiment of the code division multiple access demodulation method provided by the embodiment of the present invention may include the following steps:

S801. The modulation end sends a second modulation codeword corresponding to the target transmitting end to the demodulation end.

S802. The demodulation end receives a second demodulation codeword corresponding to the target receiving end.

The second demodulation codeword is a modulation codeword obtained after the second modulation codeword corresponding to the target transmitting end sent by the modulation end passes the transmission channel between the modulation end and the demodulation end.

S803. The demodulation end sends a value of a chip of the second demodulation codeword to the modulation end.

S804. The modulation end receives a value of a chip of the second demodulation codeword corresponding to the target receiving end returned by the demodulation end.

S805. The modulation end calculates the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword.

S806. The modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal; the target modulation codeword is an original modulation codeword and a pre-corresponding to the target transmitting end. The product of the coding coefficients.

S807. The modulation end sends a code division multiple access modulation signal to the demodulation end.

S808. The demodulation end receives the code division multiple access modulation signal modulated by the modulation terminal and modulated by the target modulation codeword.

S809. The demodulation end demodulates the code division multiple access modulation signal by using the second modulation codeword to obtain an original signal.

S810. The demodulation end sends the original signal to the target receiving end.

The embodiment of the invention further provides a demodulation end, the demodulation end comprising:

a first receiving module, configured to receive, by the demodulation end, a code division multiple access modulated signal sent by the modulation end;

a first demodulation module, configured to demodulate the code division multiple access modulation signal by using a first demodulation codeword corresponding to a target receiving end pre-stored by the demodulation end to obtain an original signal, where The first demodulated codeword is a solution obtained after the first modulation codeword corresponding to the target transmitting end that is sent by the modulation terminal passes through a transmission channel between the modulation end and the demodulation end. Code word

a first sending module, configured to send, by the demodulation end, the original signal to the target receiving end.

Specifically, please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a first embodiment of a demodulation end according to an embodiment of the present invention, which is used to implement a code division multiple access demodulation method disclosed in an embodiment of the present invention. As shown in FIG. 9, the demodulation end 100 can include:

The first receiving module 110, the first demodulation module 120, and the first sending module 130.

The first receiving module 110 is configured to receive, by the demodulation end, a code division multiple access modulated signal sent by the modulation end.

In a first embodiment of the invention, the CDMA signal is modulated using a 1 and -1 sequence for the modulation side. A CDMA signal obtained by modulating a user's data with a codeword.

The first demodulation module 120 is configured to demodulate the code division multiple access modulation signal by using the first demodulation codeword corresponding to the target receiving end pre-stored by the demodulation end to obtain an original signal. The first demodulation codeword is obtained after the first modulation codeword corresponding to the target transmitting end that is sent by the modulation terminal passes through a transmission channel between the modulation end and the demodulation end. Demodulate the codeword.

The original signal refers to the original signal sent by the user transmitting end in the transmitting side, and reflected to the receiving side, the original signal is CDMA modulated to obtain a CDMA signal and sent to the receiving side, and the demodulating end demodulates the CDMA signal. The demodulated signal is sent to the receiving end of the user, and the demodulated signal is a signal similar to the original signal; in the embodiment of the present invention, the demodulated signal is collectively referred to as the original signal.

The first sending module 130 is configured to send, by the demodulation end, the original signal to the target receiving end.

It can be understood that the original is obtained by demodulating the code division multiple access modulated signal by using the first modulation codeword. The signal, the demodulation end sends the original signal to the corresponding user receiver.

It is to be understood that the functions of the functional modules of the demodulation end 100 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and details are not described herein again. .

It can be seen that, in the solution of this embodiment, after receiving the code division multiple access modulation signal sent by the modulation end, the demodulation end 100 uses the first demodulation codeword pair corresponding to the target receiving end pre-stored by the demodulation end 100. The code division multiple access modulated signal is demodulated to obtain an original signal, and the original signal is sent to the target receiving end. The first demodulated codeword is a modulation codeword obtained after the first modulation codeword used by the modulation end modulates the code division multiple access modulation signal passes through a transmission channel between the modulation end and the demodulation end, so the first The demodulated codeword will carry the characteristics of the transmission channel between the modulation end and the demodulation end, such that when the first demodulation codeword pair carrying the characteristics of the transmission channel between the modulation end and the demodulation end is used, code division multiple access is used. When the modulated signal is demodulated, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of a second embodiment of a demodulation end according to an embodiment of the present invention, which is used to implement the code division multiple access demodulation method disclosed in the embodiment of the present invention. The demodulation end shown in FIG. 10 is optimized by the demodulation end shown in FIG. The demodulation end shown in FIG. 10 has the following extensions in addition to the module including the demodulation end shown in FIG. 9:

Optionally, in some possible implementation manners of the present disclosure, the first receiving module 210 is further configured to:

Receiving, by the modulation end, the first demodulation codeword;

The demodulation end 200 further includes:

The storage module 240 is configured to store the first demodulated codeword according to the target receiving end.

In the embodiment of the present invention, the first demodulation codeword corresponding to the target receiving end is received, and the first demodulated codeword is stored according to the target transmitting end, and the training is performed each time the modulation end and the demodulating end communicate. The phase can be performed each time the modulation end and the demodulation end re-establish communication.

Optionally, in some possible implementation manners of the present disclosure, the storage module 240 is further configured to:

Optionally, in another possible implementation manner of the present invention, the storage module 240 is further configured to:

The demodulation end 200 further includes:

The first calculating module 250 is configured to calculate, according to the at least two received first demodulated codewords, an average first demodulation codeword corresponding to the target receiving end;

The first demodulation module 220 is further configured to:

Further, in some possible implementation manners of the present invention, when the demodulation end receives the first demodulation codeword sent by the modulation terminal at least twice, the modulation end may send the first modulation codeword multiple times. After that, the first demodulation codeword is received by the demodulation end multiple times; or after the modulation end sends the first modulation codeword once, the demodulation end receives the first demodulation codeword, and the modulation end transmits the first modulation. The codeword, the demodulation end receives the first demodulation codeword, and finally the demodulation terminal receives the first demodulation codeword at least twice.

It is to be understood that the functions of the functional modules of the demodulation end 200 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and details are not described herein again. .

It can be seen that, in the solution of this embodiment, the demodulation end 200 receives the code division multiple access tone transmitted by the modulation end. After the signal is generated, the first demodulated codeword corresponding to the target receiving end pre-stored by the demodulating terminal 200 is used to demodulate the code division multiple access modulated signal to obtain an original signal, and the original signal is sent to the target receiving end. . The first demodulated codeword is a modulation codeword obtained after the first modulation codeword used by the modulation end modulates the code division multiple access modulation signal passes through a transmission channel between the modulation end and the demodulation end, so the first The demodulated codeword will carry the characteristics of the transmission channel between the modulation end and the demodulation end, such that when the first demodulation codeword pair carrying the characteristics of the transmission channel between the modulation end and the demodulation end is used, code division multiple access is used. When the modulated signal is demodulated, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

An embodiment of the present invention further provides a modulation end, where the modulation end includes:

a second sending module, configured to: send, by the modulation end, a first modulation codeword corresponding to the target transmitting end to the demodulating end; the first modulation codeword passes through a transmission channel between the modulation end and the demodulating end Obtaining a first demodulation codeword, where the first demodulation codeword is a demodulation codeword used by the demodulation end to demodulate a code division multiple access modulated signal from the modulation end;

a first modulation module, configured to perform code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access modulation signal;

The second sending module is further configured to: send the code division multiple access modulation signal to the demodulation end.

Specifically, please refer to FIG. 11. FIG. 11 is a schematic structural diagram of a first embodiment of a modulation end according to an embodiment of the present invention, which is used to implement the code division multiple access demodulation method disclosed in the embodiment of the present invention. As shown in FIG. 11, the modulation terminal 300 may include:

The second sending module 310 and the first modulation module 320.

The second sending module 310 is configured to send, to the demodulation end, a first modulation codeword corresponding to the target transmitting end, where the first modulation codeword is obtained after the transmission channel between the modulation end and the demodulation end a first demodulation codeword, the first demodulation codeword being a demodulation codeword used by the demodulation terminal to demodulate a code division multiple access modulated signal from the modulation terminal.

Specifically, the second sending module 310 is configured to:

Transmitting, to the demodulation end, the first modulation codeword corresponding to the target transmitting end;

Or transmitting, to the demodulation end, the first modulation codeword corresponding to the target transmitting end.

In the embodiment of the present invention, the modulation end sends a first modulation codeword corresponding to the target transmitting end to the demodulation end to occur in a training phase in which the modulation end communicates with the demodulation end.

The first modulation module 320 is configured to perform code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access modulation signal.

The second sending module 310 is further configured to: send the code division multiple access modulation signal to the demodulation end.

It is to be understood that the functions of the functional modules of the modulating terminal 300 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments. For the specific implementation process, refer to the related description of the foregoing method embodiments, and details are not described herein again.

It can be seen that, in the solution of this embodiment, after receiving the code division multiple access modulation signal sent by the modulation terminal 300, the demodulation end uses the first demodulation codeword corresponding to the target receiving end pre-stored by the demodulation end. The code division multiple access modulated signal is demodulated to obtain an original signal, and the original signal is sent to the target receiving end. The first demodulated codeword is a modulation codeword obtained after the first modulation codeword used by the modulation end modulates the code division multiple access modulation signal passes through a transmission channel between the modulation end and the demodulation end, so the first The demodulated codeword will carry the characteristics of the transmission channel between the modulation end and the demodulation end, such that when the first demodulation codeword pair carrying the characteristics of the transmission channel between the modulation end and the demodulation end is used, code division multiple access is used. When the modulated signal is demodulated, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

a second modulation module, configured by the modulation end, performing code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal; the target modulation codeword is corresponding to the target transmitting end a product of the second modulation codeword and the precoding coefficient;

And a third sending module, configured to send, by the modulation end, the code division multiple access modulation signal to the demodulation end.

Specifically, please refer to FIG. 12. FIG. 12 is a schematic structural diagram of a second embodiment of a modulation end according to an embodiment of the present invention, which is used to implement the code division multiple access demodulation method disclosed in the embodiment of the present invention. Wherein, as shown in FIG. 12, the modulation terminal 400 may include:

The second modulation module 410 and the third transmission module 420.

The second modulation module 410 is configured to perform code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal; the target modulation codeword is a corresponding to the target transmitting end. The product of the second modulation codeword and the precoding coefficient.

The second modulation codeword is a strict 1 and -1 sequence modulation codeword used by the modulation end to perform CDMA modulation on the original signal in a conventional manner, and the original modulation signal is modulated by using the second modulation codeword. After the CDMA signal is sent to the demodulation end, since the transmission channel is not ideal, the demodulation end demodulates the CDMA signal using the strict 1 and -1 sequence modulation code words to make the restored signal signal noise. Than low.

The third sending module 420 is configured to send, by the modulation end, the code division multiple access modulation signal to the demodulation end.

It is to be understood that the functions of the functional modules of the modulation terminal 400 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments. For the specific implementation process, refer to the related description of the foregoing method embodiments, and details are not described herein again.

It can be seen that, in the solution of this embodiment, the modulation terminal 400 performs code division multiple access modulation on the original signal by using the target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, and the code division multiple access modulation is performed. The signal is sent to the demodulating end to enable the demodulating end to demodulate the code divisional multiple access modulated signal in a conventional manner to obtain an original signal, where the target modulation codeword is a second modulation code corresponding to the target transmitting end. a product of a word and a precoding coefficient, such that the target modulation codeword carries a channel characteristic of a transmission channel between the modulation terminal 400 and the demodulation end, so that when the original modulation signal is CDMA modulated using the target modulation codeword, a CDMA signal is obtained and transmitted. When the demodulation end is used, the demodulation end can more accurately restore the original signal when the CDMA is demodulated by the conventional method, thereby improving signal transmission efficiency and high signal to noise ratio.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of a third embodiment of a modulation end according to an embodiment of the present invention, which is used to implement a code division multiple access demodulation method disclosed in an embodiment of the present invention. The modulation end shown in FIG. 13 is optimized by the modulation end shown in FIG. The modulation terminal shown in Fig. 13 has the following extensions in addition to the module including the modulation terminal shown in Fig. 12:

Optionally, in some possible implementation manners of the present disclosure, the third sending module 520 is further configured to:

The modulation terminal 500 further includes:

a second receiving module 530, configured to receive a value of a chip of a second demodulation codeword corresponding to the target receiving end that is returned by the demodulation end, where the second demodulation codeword is sent by the modulation end a demodulated codeword obtained after the second modulation codeword passes through a transmission channel between the modulation end and the demodulation end;

The second calculating module 540 is configured to calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword.

In the embodiment of the present invention, the second calculating module 540 calculates the precoding coefficient and sends the precoding coefficient to the second modulation module 510 to calculate the target modulation codeword.

Specifically, in another possible implementation manner of the present invention, if the second modulation codeword Ct is (1, -1, 1, 1), after passing through the transmission channel of the modulation end and the demodulation end, The second demodulation codeword Cr becomes (0.9, -0.8, 0.85, 0.95), and then the demodulation end will slice each chip of the second demodulation codeword. After the value is returned to the modulation terminal, the modulation terminal will receive the values of 0.9, -0.8, 0.85, and 0.95. The precoding coefficient coef is coef=Ct/Cr, that is, (1/0.9, -1/-0.8, 1/0.85, 1/0.95), so that the target modulation codeword is Ct*coef, that is, Ct*Ct. /Cr, and since the coefficient of variation of the target modulation codeword will be Cr/Ct during channel transmission, the target modulation codeword will be changed again after being transmitted from the modulation end to the demodulation end according to the original channel. (Ct*Ct/Cr)*(Cr/Ct)=Ct, so that the original signal can be accurately restored when the demodulation end continues to use the second modulation codeword Ct for demodulation.

It can be understood that transmitting the second modulation codeword corresponding to the target transmitting end by time division serial or frequency division will enable each modulation codeword to be separately transmitted according to the target transmitting end, thereby enabling the second demodulation received by the demodulating end. The codewords are distinguished by the target sender, so that the resulting precoding coefficients can also be distinguished by the target sender.

The second receiving module 530 is further configured to: receive the value of the chip of the second demodulated codeword corresponding to the target receiving end that is returned by the demodulating end at least twice;

The second calculating module 540 is further configured to: calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword.

The second receiving module 530 is further configured to: receive the average second solution returned by the demodulation end a value of a chip of the codeword; the average second demodulation codeword is an average of the second demodulation codeword received by the demodulation terminal at least twice;

It can be understood that, by transmitting the second modulation codeword multiple times at the modulation end, and receiving the second demodulation codeword multiple times by the demodulation end, the average second demodulation codeword is calculated, and the average second demodulation code is utilized. The word is calculated by the precoding coefficient to correct the second modulation code word to obtain the target modulation code word, so that the original signal is modulated by the target modulation code word to obtain a CDMA signal and transmitted to the demodulation end, and the demodulation end is performed in a conventional manner. The original signal obtained by demodulation and reduction is also more accurate, reducing the influence of white Gaussian noise.

It is to be understood that the functions of the functional modules of the modulation terminal 500 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments. For the specific implementation process, reference may be made to the related description of the foregoing method embodiments, and details are not described herein again.

It can be seen that, in the solution of this embodiment, the modulation end 500 performs code division multiple access modulation on the original signal by using the target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, and the code division multiple access modulation is performed. The signal is sent to the demodulation end to enable the demodulation end to demodulate the code divisional multiple access modulation signal in a conventional manner to obtain an original signal, where the target modulation codeword is a second modulation codeword corresponding to the target transmitting end a product of coding coefficients, such that the target modulation codeword carries a channel characteristic of a transmission channel between the modulation terminal 500 and the demodulation end, so that when the original modulation signal is CDMA modulated using the target modulation codeword, a CDMA signal is obtained and sent to the demodulation. When the terminal is demodulated, the demodulation end can more accurately restore the original signal, improve the signal transmission efficiency, and have a high signal to noise ratio.

a third receiving module, configured to receive a second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is a second modulation codeword sent by the modulation end and corresponding to the target sending end a demodulation codeword obtained after a transmission channel between the modulation end and the demodulation end;

a fourth sending module, configured to send, to the modulation end, a value of a chip of the second demodulated codeword;

The third receiving module is further configured to:

Receiving, by the modulation end, a code division multiple access modulated signal modulated by a target modulation codeword, The target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient;

And a second demodulation module, configured to demodulate the code division multiple access modulated signal by using the second modulation codeword to obtain an original signal.

Specifically, please refer to FIG. 14. FIG. 14 is a schematic structural diagram of a third embodiment of a demodulation end according to an embodiment of the present invention, which is used to implement the code division multiple access demodulation method disclosed in the embodiment of the present invention. Wherein, as shown in FIG. 14, the demodulation end 600 may include:

The third receiving module 610, the fourth sending module 620, and the second demodulating module 630.

The third receiving module 610 is configured to receive a second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is a second modulation codeword corresponding to the target sending end that is sent by the modulation end. a demodulated codeword obtained after a transmission channel between the modulation end and the demodulation end.

The fourth sending module 620 is configured to send, to the modulation end, a value of a chip of the second demodulated codeword.

The third receiving module is further configured to:

Receiving, by the modulation end, a code division multiple access modulated signal modulated by a target modulation codeword, where the target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient.

The second demodulation module 630 is configured to demodulate the code division multiple access modulated signal by using the second modulation codeword to obtain an original signal.

It is to be understood that the functions of the functional modules of the demodulation end 600 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and details are not described herein again. .

It can be seen that, in the solution of this embodiment, the demodulation end 600 performs code division multiple access modulation on the original signal by using the target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, and divides the code division multiple access. The modulated signal is sent to the demodulation terminal 600 to cause the demodulation terminal 600 to demodulate the code divisional multiple access modulated signal in a conventional manner to obtain an original signal, where the target modulation codeword is a second modulation code corresponding to the target transmitting end. The product of the word and the precoding coefficient. Therefore, the target modulation codeword carries a channel characteristic of a transmission channel between the modulation end and the demodulation end, so that when the original signal is CDMA-modulated using the target modulation codeword to obtain a CDMA signal and sent to the demodulation end, the solution can be solved. When the CDMA is demodulated by the conventional method, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

Referring to FIG. 15, FIG. 15 is a diagram of a fourth embodiment of a demodulation end according to an embodiment of the present invention. The schematic diagram is used to implement the code division multiple access demodulation method disclosed in the embodiment of the present invention. The demodulation end shown in FIG. 15 is optimized by the demodulation end shown in FIG. The demodulation end shown in Fig. 15 has the following extensions in addition to the module including the demodulation end shown in Fig. 14:

Optionally, in some possible implementation manners of the present disclosure, the third receiving module 710 is configured to:

The demodulation end 700 further includes:

a third calculating module 740, configured to calculate an average value of the at least two received second demodulated codewords to obtain an average second demodulated codeword;

The fourth sending module 720 is further configured to: send, to the modulation end, a value of a chip of the average second demodulated codeword.

It can be understood that, by receiving the second demodulated codeword multiple times and calculating the average second demodulated codeword, the value of the chip of the average second demodulated codeword is returned to the modulation end, so that the modulation end utilizes the average. Calculating the precoding coefficient by the value of the chip of the second demodulated codeword, so that the precoding coefficient can more accurately carry the channel characteristics, so that the modulation of the original signal by the subsequent modulation end and the demodulation of the original signal by the demodulation end are also more To be accurate, reduce the effects of Gaussian white noise.

It is to be understood that the functions of the functional modules of the demodulation end 700 of the present embodiment may be specifically implemented according to the method in the foregoing method embodiments, and the specific implementation process may refer to the related description of the foregoing method embodiments, and details are not described herein again. .

It can be seen that, in the solution of this embodiment, the demodulation end 700 performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, and divides the code division multiple access. The modulated signal is sent to the demodulation end 700 to cause the demodulation end 700 to demodulate the code divisional multiple access modulated signal in a conventional manner to obtain an original signal, the target modulation codeword being a second modulation code corresponding to the target transmitting end. The product of the word and the precoding coefficient. Therefore, the target modulation codeword carries a channel characteristic of a transmission channel between the modulation end and the demodulation end, so that when the original signal is CDMA-modulated using the target modulation codeword to obtain a CDMA signal and sent to the demodulation end, the solution can be solved. When the CDMA is demodulated by the conventional method, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

Referring to FIG. 16, FIG. 16 is a schematic structural diagram of a fifth embodiment of a demodulation end according to an embodiment of the present invention, which is used to implement a code division multiple access demodulation method disclosed in an embodiment of the present invention. Wherein the demodulation end 800 may include at least one bus 801, at least one processor 802 coupled to bus 801, and at least one memory 803 coupled to bus 801.

The processor 802 calls the code stored in the memory through the bus 801 for the demodulation end to receive the code division multiple access modulated signal sent by the modulation end; the demodulation end uses the pre-stored and target receiving by the demodulation end. The first demodulated codeword corresponding to the end demodulates the code division multiple access modulated signal to obtain an original signal, where the first demodulated codeword is sent by the modulation end corresponding to the target transmitting end a demodulated codeword obtained after the first modulation codeword passes through a transmission channel between the modulation end and the demodulation end; the demodulation end transmits the original signal to the target receiving end.

Optionally, in some possible implementation manners of the present invention, before the demodulating end of the processor 802 receives the code division multiple access modulated signal sent by the modulation end, the method is further configured to:

Receiving, by the modulation end, the first demodulation codeword;

Optionally, in some possible implementation manners of the present invention, the processor 802 is further configured to:

The demodulating end of the processor 802 demodulates the code division multiple access modulated signal by using a first demodulated codeword corresponding to the target receiving end pre-stored by the demodulating end to obtain an original signal, including:

Alternatively, the processor 802 calls the code stored in the memory through the bus 801 for the demodulation end to receive the second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is sent by the modulation end. Demodulating a codeword obtained after the second modulation codeword corresponding to the target transmitting end passes the transmission channel between the modulation end and the demodulation end; and transmitting the second demodulation codeword to the modulation end a value of the chip; receiving, by the modulation end, a code division multiple access modulation signal modulated by a target modulation codeword, where the target modulation codeword is a second modulation codeword and a precoding coefficient corresponding to the target transmitting end The product of the code division multiple access modulated signal is demodulated by the second modulation codeword to obtain an original signal.

Transmitting, by the processor 802, the value of the chip of the second demodulated codeword to the modulation end, including:

Referring to FIG. 17, FIG. 17 is a schematic structural diagram of a fourth embodiment of a modulation end according to an embodiment of the present invention, which is used to implement a code division multiple access demodulation method disclosed in an embodiment of the present invention. The modulation terminal 900 can include: at least one bus 901, at least one processor 902 connected to the bus 901, and at least one memory 903 connected to the bus 901.

The processor 902, by using the bus 901, calls a code stored in the memory for the modulation end to send a first modulation codeword corresponding to the target transmitting end to the demodulation end; the first modulation codeword passes through the modulation end and a first demodulation codeword is obtained after the transmission channel between the demodulation ends, and the first demodulation codeword is a solution used by the demodulation end to demodulate a code division multiple access modulated signal from the modulation end a code division word; performing code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access modulation signal; and transmitting the code division multiple access modulation signal to the demodulation end.

Optionally, in some possible implementation manners of the present invention, the modulating end of the processor 902 sends a first modulation codeword corresponding to the target sending end to the demodulating end, including:

Alternatively, the processor 902 calls the code stored in the memory through the bus 901 for the modulation end to perform code division multiple access modulation on the original signal using the target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal; The target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient; the modulation end transmits the code division multiple access modulation signal to the demodulation end.

Optionally, in some possible implementation manners of the present disclosure, the processor 902 is configured to perform code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal. Previously, it was also used to:

Optionally, in some possible implementation manners of the present invention, the processor 902 is configured to send, by the modulation end, the second modulation codeword corresponding to the target sending end to the demodulating end, including:

Optionally, in some possible implementation manners of the present disclosure, the processor 902 is configured to send, by the modulation end, a second modulation codeword corresponding to the target sending end to the demodulating end; and receive the solution The value of the chip of the second demodulated codeword corresponding to the target receiving end returned by the terminal includes:

Transmitting, by the modulation end, the second modulation codeword corresponding to the target transmitting end to the demodulating end at least twice; receiving the second solution corresponding to the target receiving end returned by the demodulating end at least twice The value of the chip of the codeword; the processor 902 is further configured to:

The processor 902 calculates the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword, and includes:

Optionally, in some possible implementation manners of the present disclosure, the processor 902 is configured to send, by the modulation end, the second modulation codeword corresponding to the target sending end to the demodulating end;

The value of the chip used by the processor 902 to receive the second demodulated codeword corresponding to the target receiving end returned by the demodulation end includes:

Receiving a value of a chip of the average second demodulated codeword returned by the demodulation end; the average second Demodulating a codeword is an average value of the second demodulated codeword received by the demodulation terminal at least twice;

The processor 902 is configured to calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword, and includes:

Referring to FIG. 18, FIG. 18 is a schematic diagram of a code division multiple access demodulation system according to an embodiment of the present invention. As shown in FIG. 18, a code division multiple access demodulation system according to an embodiment of the present invention may specifically include: a modulation end 101, a demodulation end 820, and a target receiving end 830.

The demodulation end 820 is configured to receive a code division multiple access modulated signal sent by the modulation end;

And demodulating the code division multiple access modulated signal by using a first demodulated codeword corresponding to the target receiving end 830 pre-stored by the demodulating end to obtain an original signal, where the first demodulated codeword is a demodulation codeword obtained by the modulation end after the first modulation codeword corresponding to the target transmitting end passes through a transmission channel between the modulation end and the demodulation end;

The original signal is sent to the target receiving end 830.

Before the demodulation terminal 820 receives the code division multiple access modulated signal sent by the modulation end, it is also used to:

Receiving, by the modulation end, the first demodulation codeword;

The demodulating end 820 is further configured to receive the first demodulated codeword sent by the modulation end at least twice;

Calculating, according to the at least two received first demodulation codewords, an average first demodulation codeword corresponding to the target receiving end 830;

The demodulating end 820 demodulates the code division multiple access modulated signal by using a first demodulated codeword corresponding to the target receiving end 830 pre-stored by the demodulating end to obtain an original signal, including:

The modulation end 810 is configured to send, by the modulation end, a first modulation codeword corresponding to the target transmitting end to the demodulation end, where the first modulation codeword passes a transmission channel between the modulation end and the demodulation end. And obtaining a first demodulation codeword, where the first demodulation codeword is a demodulation codeword used by the demodulation end to demodulate a code division multiple access modulated signal from the modulation end;

Performing code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access Modulated signal;

Transmitting the code division multiple access modulated signal to the demodulation end.

The modulation end 810 is configured to send, to the demodulation end, a first modulation codeword corresponding to the target sending end, including:

Or, the modulation end 810 is configured to perform code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal; the target modulation codeword is a second corresponding to the target transmitting end. The product of the modulation codeword and the precoding coefficient;

Transmitting the code division multiple access modulated signal to a demodulation terminal.

The modulation terminal 810 performs code division multiple access modulation on the original signal using the target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, and is further used for:

Receiving, by the demodulation end, a value of a chip of a second demodulation codeword corresponding to the target receiving end 830; the second demodulation codeword is a second modulation codeword sent by the modulation end a demodulation codeword obtained after the transmission channel between the modulation end and the demodulation end;

The modulation end 810 is configured to send a second modulation codeword corresponding to the target sending end, including:

The modulation end 810 is configured to send, to the demodulation end, a second modulation codeword corresponding to the target sending end, and receive a second demodulation codeword corresponding to the target receiving end 830 returned by the demodulation end The value of the chip includes:

The modulation end transmits a second modulation codeword corresponding to the target receiving end 830 to the demodulation end at least twice; and receives at least two times corresponding to the target receiving end 830 returned by the demodulation end The value of the chip of the second demodulated codeword;

The modulation end 810 is further configured to calculate, according to the at least two received second demodulation codewords, an average second demodulation codeword corresponding to the target receiving end 830;

The modulation end 810 is configured to calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword, and includes:

a modulation end 810, configured to send, to the demodulation end, a second modulation codeword corresponding to the target sending end;

The modulation end 810, configured to receive, by the demodulation end, a value of a chip of the second demodulation codeword corresponding to the target sending end, where:

The modulation end 810 is configured to calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword, and includes:

The demodulation end 820 is configured to receive a second demodulation codeword corresponding to the target receiving end 830, where the second demodulation codeword is a second modulation codeword corresponding to the target receiving end 830 sent by the modulation end. a modulation code word obtained after the transmission channel between the modulation end and the demodulation end;

Transmitting, to the modulation end, a value of a chip of the second demodulated codeword;

Receiving, by the modulation end, a code division multiple access modulation signal modulated by a target modulation codeword, where the target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient;

Demodulating the code division multiple access modulated signal with the second modulation codeword to obtain an original signal.

The demodulating end 820 is further configured to receive the second demodulated codeword corresponding to the target receiving end 830 at least twice;

Calculating an average value of the at least two received second demodulation codewords to obtain an average second demodulation code word;

The demodulating end 820 is configured to send, to the modulation end, a value of a chip of the second demodulated codeword, including:

It can be seen that, in the solution of this embodiment, the demodulation end 820 receives the code division multiple access modulation signal sent by the modulation terminal 810, and then uses the first demodulation code word corresponding to the target receiving end pre-stored by the demodulation terminal 820. The code division multiple access modulated signal is demodulated to obtain an original signal, and the original signal is sent to the target receiving end. The first demodulated codeword is a modulation codeword obtained after the first modulation codeword used by the modulation end modulates the code division multiple access modulation signal passes through a transmission channel between the modulation end and the demodulation end, so the first The demodulated codeword will carry the characteristics of the transmission channel between the modulation end and the demodulation end, such that when the first demodulation codeword pair carrying the characteristics of the transmission channel between the modulation end and the demodulation end is used, code division multiple access is used. When the modulated signal is demodulated, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

Alternatively, it can be seen that the modulation terminal 810 performs code division multiple access modulation on the original signal by using the target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, and sends the code division multiple access modulated signal to the solution. The terminal 820 is configured to cause the demodulation terminal 810 to demodulate the code divisional multiple access modulated signal in a conventional manner to obtain an original signal, where the target modulation codeword is a second modulation codeword corresponding to the target transmitting end and a precoding coefficient. product. Therefore, the target modulation codeword carries a channel characteristic of a transmission channel between the modulation end and the demodulation end, so that when the original signal is CDMA-modulated using the target modulation codeword to obtain a CDMA signal and sent to the demodulation end, the solution can be solved. When the CDMA is demodulated by the conventional method, the original signal can be restored more accurately, the signal transmission efficiency is improved, and the signal-to-noise ratio is high.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of the code division multiple access modulation method described in the foregoing method embodiments.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the several embodiments provided herein, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or some of the technical features are replaced by equivalents; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

A code division multiple access demodulation method, characterized in that the method comprises:

The demodulation end receives the code division multiple access modulation signal transmitted by the modulation end;

The demodulating end demodulates the code division multiple access modulated signal by using a first demodulated codeword corresponding to the target receiving end pre-stored by the demodulating end to obtain an original signal, where the first demodulation The codeword is a demodulated codeword obtained after the first modulation codeword corresponding to the target transmitting end that is sent by the modulation end passes the transmission channel between the modulation end and the demodulation end;

The demodulation end transmits the original signal to the target receiving end.
The method according to claim 1, wherein before the demodulating end receives the code division multiple access modulated signal sent by the modulation end, the method further includes:

Receiving, by the modulation end, the first demodulation codeword;

And storing the first demodulated codeword corresponding to the target receiving end.
The method according to claim 1 or 2, wherein the method further comprises:

Receiving the first demodulated codeword sent by the modulation terminal at least twice;

Calculating, according to the at least two received first demodulation codewords, an average first demodulation codeword corresponding to the target receiving end;

The demodulating end demodulates the code division multiple access modulated signal by using a first demodulated codeword corresponding to the target receiving end pre-stored by the demodulating end to obtain an original signal, including:

The demodulation end demodulates the code division multiple access modulated signal by using the average first demodulation codeword to obtain an original signal.
A code division multiple access demodulation method, characterized in that the method comprises:

The modulation end sends a first modulation codeword corresponding to the target transmitting end to the demodulation end; the first modulation codeword passes the transmission channel between the modulation end and the demodulation end to obtain a first demodulation codeword The first demodulation codeword is a demodulation codeword used by the demodulation end to demodulate a code division multiple access modulated signal from the modulation end;

Performing code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access modulation signal;

Transmitting the code division multiple access modulated signal to the demodulation end.
A code division multiple access demodulation method, characterized in that the method comprises:

The modulation end performs code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulation signal; the target modulation codeword is a second modulation codeword corresponding to the target transmitting end and the pre-modulation Product of the coding coefficient;

The modulation end transmits the code division multiple access modulation signal to a demodulation end.
The method according to claim 5, wherein the method further performs code division multiple access modulation on the original signal using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal, the method further include:

Transmitting, by the modulation end, a second modulation codeword corresponding to the target sending end to the demodulation end;

Receiving, by the demodulation end, a value of a chip of a second demodulation codeword corresponding to the target receiving end; the second demodulation codeword is a second modulation codeword sent by the modulation end a demodulation codeword obtained after a transmission channel between the modulation end and the demodulation end;

The precoding coefficient is calculated, and the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword.
The method according to claim 6, wherein the modulation end transmits a second modulation codeword corresponding to the target transmitting end to the demodulating end; and receives the target returned by the demodulating end and the target The value of the chip of the second demodulation codeword corresponding to the receiving end includes:

Transmitting, by the modulation end, the second modulation codeword corresponding to the target transmitting end to the demodulating end at least twice; receiving the second solution corresponding to the target receiving end returned by the demodulating end at least twice The value of the chip of the codeword; the method further includes:

Calculating, according to the at least two received second demodulation codewords, an average second demodulation codeword corresponding to the target receiving end;

Calculating the precoding coefficient, where the precoding coefficient is the second modulation codeword and the The ratio of the second demodulated codeword includes:

The precoding coefficient is calculated, and the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword.
The method according to claim 6, wherein the modulation end sends a second modulation codeword corresponding to the target transmitting end to the demodulation end;

Transmitting, by the modulation end, the second modulation codeword corresponding to the target sending end to the demodulation end at least twice;

And receiving, by the demodulation end, a value of a chip of a second demodulation codeword corresponding to the target receiving end, where:

Receiving, by the demodulation end, a value of a chip of the average second demodulation codeword; the average second demodulation codeword being the second demodulation received by the demodulation terminal at least twice The average value of the codeword;

Calculating the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword, and includes:

The precoding coefficient is calculated, and the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword.
A code division multiple access demodulation method, characterized in that the method comprises:

The demodulation end receives a second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is a second modulation codeword that is sent by the modulation end and corresponds to the target transmitting end, passes through the modulation end and the Demodulating code words obtained after the transmission channel between the demodulation terminals;

Transmitting, to the modulation end, a value of a chip of the second demodulated codeword;

Receiving, by the modulation end, a code division multiple access modulation signal modulated by a target modulation codeword, where the target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient;

Demodulating the code division multiple access modulated signal with the second modulation codeword to obtain an original signal.
The method of claim 9 wherein the method further comprises:

Receiving, by the demodulation end, the second demodulation codeword corresponding to the target receiving end at least twice;

Calculating an average value of the at least two received second demodulation codewords to obtain an average second demodulation code word;

Transmitting, by the modulation end, a value of a chip of the second demodulation codeword, including:

Transmitting, to the modulation terminal, a value of a chip of the average second demodulated codeword.
A demodulation end, wherein the demodulation end comprises:

a first receiving module, configured to receive a code division multiple access modulated signal sent by the modulation end;

a first demodulation module, configured to demodulate the code division multiple access modulation signal by using a first demodulation codeword corresponding to a target receiving end pre-stored by the demodulation end to obtain an original signal, where a demodulated codeword is a demodulated codeword obtained after the first modulation codeword corresponding to the target transmitting end sent by the modulation end passes through a transmission channel between the modulation end and the demodulation end;

And a first sending module, configured to send the original signal to the target receiving end.
The demodulation end according to claim 11, wherein the first receiving module is further configured to:

Receiving, by the modulation end, the first demodulation codeword;

The demodulation end further includes:

And a storage module, configured to store the first demodulated codeword corresponding to the target receiving end.
The demodulation end according to claim 11 or 12, wherein the first receiving module is further configured to:

Receiving the first demodulated codeword sent by the modulation terminal at least twice;

The demodulation end further includes:

a first calculating module, configured to calculate, according to the at least two received first demodulated codewords, an average first demodulated codeword corresponding to the target receiving end;

The first demodulation module is further configured to:

The code division multiple access modulated signal is demodulated using the average first demodulated codeword to obtain an original signal.
A modulation end, wherein the modulation end comprises:

a second sending module, configured to send, to the demodulation end, a first modulation codeword corresponding to the target sending end; The first modulation codeword is obtained by the transmission channel between the modulation end and the demodulation end to obtain a first demodulation codeword, and the first demodulation codeword is demodulated from the demodulation end from the a demodulation codeword used by the code division multiple access modulation signal at the modulation end;

a first modulation module, configured to perform code division multiple access modulation on the original signal by using the first modulation codeword to obtain the code division multiple access modulation signal;

The second sending module is further configured to: send the code division multiple access modulation signal to the demodulation end.
A modulation end, wherein the modulation end comprises:

a second modulation module, configured to perform code division multiple access modulation on the original signal by using a target modulation codeword corresponding to the target transmitting end to obtain a code division multiple access modulated signal; the target modulation codeword is a second corresponding to the target transmitting end The product of the modulation codeword and the precoding coefficient;

And a third sending module, configured to send the code division multiple access modulated signal to the demodulation end.
The modulation terminal according to claim 15, wherein the third sending module is further configured to:

Transmitting, to the demodulation end, a second modulation codeword corresponding to the target transmitting end;

The modulation end further includes:

a second receiving module, configured to receive a value of a chip of a second demodulation codeword corresponding to the target receiving end returned by the demodulation end; the second demodulation codeword is sent by the modulation end a demodulated codeword obtained after the second modulation codeword passes through a transmission channel between the modulation end and the demodulation end;

And a second calculating module, configured to calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the second demodulation codeword.
The modulation terminal according to claim 16, wherein the third sending module is further configured to:

Transmitting, to the demodulation end, the second modulation codeword corresponding to the target transmitting end at least twice;

The second receiving module is further configured to: receive the value of the chip of the second demodulated codeword corresponding to the target receiving end that is returned by the demodulating end at least twice;

The second calculating module is further configured to: calculate the precoding coefficient, the precoding coefficient And is a ratio of the second modulation codeword to the average second demodulation codeword.
The modulation terminal according to claim 16, wherein the third sending module is further configured to:

Transmitting, to the demodulation end, the second modulation codeword corresponding to the target transmitting end at least twice;

The second receiving module is further configured to: receive a value of a chip of the average second demodulation codeword returned by the demodulation end; and the average second demodulation codeword is at least the demodulation end The average value of the second demodulated codeword received twice;

The second calculating module is further configured to: calculate the precoding coefficient, where the precoding coefficient is a ratio of the second modulation codeword to the average second demodulation codeword.
A demodulation end, wherein the demodulation end comprises:

a third receiving module, configured to receive a second demodulation codeword corresponding to the target receiving end, where the second demodulation codeword is a second modulation codeword sent by the modulation end and corresponding to the target sending end a demodulation codeword obtained after a transmission channel between the modulation end and the demodulation end;

a fourth sending module, configured to send, to the modulation end, a value of a chip of the second demodulated codeword;

The third receiving module is further configured to:

Receiving, by the modulation end, a code division multiple access modulation signal modulated by a target modulation codeword, where the target modulation codeword is a product of a second modulation codeword corresponding to the target transmitting end and a precoding coefficient;

And a second demodulation module, configured to demodulate the code division multiple access modulated signal by using the second modulation codeword to obtain an original signal.
The demodulation end according to claim 19, wherein the third receiving module is configured to:

Receiving the second demodulation codeword corresponding to the target receiving end at least twice;

The demodulation end further includes:

a third calculating module, configured to calculate an average value of the at least two received second demodulated codewords to obtain an average second demodulated codeword;

The fourth sending module is further configured to: send the average second demodulation codeword to the modulation end The value of the chip.
A code division multiple access demodulation system, characterized in that the system comprises:

The demodulation end according to any one of claims 11 to 13, and the modulation end according to claim 14;

Or the modulation end according to any one of claims 15 to 18, and the demodulation end according to claim 19 or claim 20.