CN104716999A - Code-division single antenna multithread information sending and receiving method, equipment and system - Google Patents
Code-division single antenna multithread information sending and receiving method, equipment and system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0625—Transmitter arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0631—Receiver arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a code-division single antenna multithread information sending and receiving method, equipment and system. At a sender side, serial-parallel conversion is carried out on input information streams, and M paths of parallel information streams are obtained; all the M paths of parallel information streams are multiplied by corresponding K-order orthogonal codes in a first preset K-order orthogonal code set respectively, and the obtained results are summed; a single path of baseband signals obtained after summarization are converted into a single path of radio frequency signals and then the single path of radio frequency signals are sent to a receiver; at the receiver side, the single path of radio frequency signals sent by the sender are received and converted into the single path of baseband signals; the single path of baseband signals are multiplied by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, corresponding integration is carried out on the obtained results, and N paths of parallel signal streams are obtained; serial-parallel conversion is carried out the N paths of parallel signal streams, and the obtained information streams are output. The requirements for realizing code-division MIMO communication are reduced, and equipment power consumption is reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a device, and a system for transmitting and receiving code division single-antenna multi-stream information.
Background
In the prior art, MIMO (Multiple Input Multiple Output) systems are implemented based on multi-antenna communication systems. An N x M antenna MIMO transceiver system is shown in figure 1.
The N-antenna MIMO transceiver is based on the principle that at the transmitter end, an information stream is converted into a parallel information stream through a serial-parallel conversion system (the serial-parallel conversion system may have space-time coding and other functions), and then the parallel information stream is modulated, amplified and the like and transmitted through multiple antennas. At the receiver end, the signal is received by multiple antennas and demodulated to a baseband signal, and then the information stream is restored by a parallel-to-serial conversion system (the parallel-to-serial conversion system may include space-time decoding or channel estimation).
Taking the system architecture shown in figure 1 as an example,
the transmitting antenna is set as follows: xM=[x1，x2，x3…xM] （1）
The receiving antenna is as follows: y isN=[y1，y2，y3…yN] （2）
If the radio frequency transmitter and the radio frequency receiver are in a linear working area and the gains of the paths are equal, then:
x1=Ax1′，x2=Ax2′…，xM=AxM′ （3）
y1′=By1，y2′=By2…，yN′=ByN （4）
wherein A and B are constants.
The channel matrix is:
then:
YN＝HN×M+XM （6）
where n is the channel noise vector.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
1) the performance to achieve MIMO spatial multiplexing must meet multipath channel conditions and be uncorrelated between the multiple antennas. From the formula (6), Y to be transmitted from the receiving antennaNRestore the receiving antenna end XMNeed to be aligned to the channel matrix HN×MTaking an inverse matrix, wherein if the channel is a strong correlation channel, the inverse matrix cannot be taken;
2) multiple radio frequency transceivers are required for multiple antenna MIMO transceivers, thus also resulting in a multiplied power consumption. Especially, the standby time is greatly shortened due to the multiple increase of the power consumption of the terminal product;
3) the index test of the multi-antenna MIMO product, especially the OTA index test, is a big problem in the industry. At present, in the industry, there are more than three testing methods for the OTA test of the multi-antenna MIMO product, and each testing method is complex and has high testing cost.
Disclosure of Invention
The invention provides a method, equipment and a system for sending and receiving code division single-antenna multi-stream information, which are used for reducing the requirement on realizing code division Multiple Input Multiple Output (MIMO) communication and reducing the power consumption of the equipment.
In order to achieve the above object, an embodiment of the present invention provides a method for sending code division single antenna multi-stream information, which is applied to a code division single antenna multi-stream information transceiving system including a transmitter and a receiver, and the method includes:
the transmitter carries out serial-parallel conversion on the input information flow to obtain M paths of parallel information flows;
the sender multiplies each information flow in the M parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and sums the obtained results; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
and the sender converts the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sends the single-path radio frequency signal to the receiver.
The embodiment of the invention also provides a code division single-antenna multi-stream information receiving method, which is applied to a code division single-antenna multi-stream information receiving and transmitting system comprising a transmitter and a receiver, and comprises the following steps:
the receiver receives a single-path radio frequency signal sent by the sender and converts the single-path radio frequency signal into a single-path baseband signal; the single-channel radio frequency signal is obtained by the transmitter performing serial-parallel conversion on input information to obtain M channels of parallel information streams, multiplying each channel of information stream in the M channels of parallel information streams by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, summing obtained results and then converting the summed result; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the receiver multiplies the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performs corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N;
and the receiver performs parallel-serial conversion on the N paths of parallel signal streams and outputs the obtained information stream.
An embodiment of the present invention further provides a transmitter, which is applied to a code division single antenna multi-stream information transceiving system including a receiver, and the transmitter includes:
the serial-parallel conversion unit is used for performing serial-parallel conversion on the input information flow to obtain M paths of parallel information flows;
the processing unit is used for multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively and summing the obtained results; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
and the radio frequency transmitter unit is used for converting the single-path baseband signals obtained by summing the processing units into single-path radio frequency signals and then transmitting the single-path radio frequency signals to the receiver.
The embodiment of the invention also provides a receiver, which is applied to a code division single-antenna multi-stream information receiving and transmitting system comprising a transmitter, and the receiver comprises:
the radio frequency receiver unit is used for receiving a single-channel radio frequency signal sent by the sender and converting the single-channel radio frequency signal into a single-channel baseband signal; the single-channel radio frequency signal is obtained by the transmitter performing serial-parallel conversion on input information to obtain M channels of parallel information streams, multiplying each channel of information stream in the M channels of parallel information streams by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, summing obtained results and then converting the summed result; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the processing unit is used for multiplying the single-path baseband signal by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively and performing corresponding integration on the obtained results respectively to obtain N paths of parallel signal streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N;
and the parallel-serial conversion unit is used for performing parallel-serial conversion on the N paths of parallel signal streams and outputting the obtained information streams.
The embodiment of the invention also provides a code division single-antenna multi-stream information transceiving system, which comprises a transmitter and a receiver, wherein:
the transmitter is used for performing serial-parallel conversion on the input information flow to obtain M paths of parallel information flows; multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and summing the obtained results; converting the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sending the single-path radio frequency signal to a receiver; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the receiver is used for receiving the single-channel radio frequency signal sent by the sender and converting the single-channel radio frequency signal into a single-channel baseband signal; multiplying the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performing corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; performing parallel-serial conversion on the N paths of parallel signal streams, and outputting the obtained information streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N.
In the above embodiment of the present invention, for the sender side, the sender performs serial-to-parallel conversion on the input information stream to obtain M parallel information streams; multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and summing the obtained results; and converting the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sending the single-path radio frequency signal to a receiver. For the receiver side, the receiver receives the single-channel radio frequency signal sent by the sender and converts the single-channel radio frequency signal into a single-channel baseband signal; multiplying the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performing corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; and the N paths of parallel signal streams are subjected to parallel-serial conversion, and the obtained information streams are output, so that the requirement for realizing code division Multiple Input Multiple Output (MIMO) communication is reduced, and the power consumption of equipment is reduced.
Drawings
Fig. 1 is a schematic diagram of an M × N antenna MIMO transceiver system in the prior art;
fig. 2 is a flowchart illustrating a method for transmitting code division single antenna multi-stream information according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for receiving code division single-antenna multi-stream information according to an embodiment of the present invention;
fig. 4A is a schematic diagram of a code division single antenna information transmitter according to an embodiment of the present invention;
fig. 4B is a schematic diagram of a code division single antenna information receiver according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a transmitter according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a receiver according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a code division single-antenna multi-stream information transceiving system according to an embodiment of the present invention.
Detailed Description
To solve the above problems in the prior art, an embodiment of the present invention provides a technical scheme for transmitting and receiving code division single-antenna multi-stream information, and the technical scheme is applied to a code division single-antenna multi-stream information transceiving system including a transmitter and a receiver. In the technical scheme, for a sender side, the sender carries out serial-parallel conversion on an input information stream to obtain M paths of parallel information streams; multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and summing the obtained results; and converting the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sending the single-path radio frequency signal to a receiver. For the receiver side, the receiver receives the single-channel radio frequency signal sent by the sender and converts the single-channel radio frequency signal into a single-channel baseband signal; multiplying the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performing corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; and the N paths of parallel signal streams are subjected to parallel-serial conversion, and the obtained information streams are output, so that the requirement for realizing code division Multiple Input Multiple Output (MIMO) communication is reduced, and the power consumption of equipment is reduced.
In the embodiment of the present invention, the first preset K-order orthogonal code includes M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; K. m, N is a positive integer, and K is not less than M and N, N is not less than M.
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are some, not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 2, a schematic flow chart of a method for sending code division single antenna multi-stream information according to an embodiment of the present invention may include the following steps:
step 201, the transmitter performs serial-to-parallel conversion on the input information stream to obtain M parallel information streams.
Specifically, the specific processing mode of the transmitter converting the input information stream into M parallel information streams in serial-parallel is the same as the serial-parallel conversion processing mode in the prior art, and is not described herein again.
Where M is a positive integer, and its specific value can be determined according to a specific application scenario (determined according to the processing performance of the transmitter).
Step 202, the sender multiplies each information flow in the M parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set, and sums the obtained results.
Specifically, in the embodiment of the present invention, after the transmitter converts the input information stream into M parallel information streams, for each information stream in the M parallel information streams, the transmitter may multiply the information stream by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set, and sum results of multiplication of each information stream in the M parallel information streams by the corresponding K-order orthogonal code, so as to obtain a single-channel baseband signal.
The first preset K-order orthogonal code set comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, and K is a positive integer not less than M.
Step 203, the sender converts the summed single-channel baseband signal into a single-channel radio frequency signal and sends the single-channel radio frequency signal to the receiver.
Specifically, the transmitter obtains a single-channel baseband signal after the processing in step 202, and the transmitter may further perform frequency conversion processing on the single-channel baseband signal to convert the single-channel baseband signal into a single-channel radio frequency signal. The specific processing method is the same as the processing method of converting the baseband signal into the radio frequency signal in the prior art, and is not described herein again.
After the processing of steps 201 to 203, the transmitter processes the input information stream into a single-channel radio frequency signal and transmits the single-channel radio frequency signal to the receiver. After receiving the single-channel rf signal, the receiver may perform reduction processing on the single-channel rf signal, and the specific implementation of the reduction processing may be as shown in fig. 3.
As shown in fig. 3, a flow chart of a method for receiving code division single antenna multi-stream information according to an embodiment of the present invention may include the following steps:
step 301, the receiver receives a single-channel radio frequency signal sent by the sender, and converts the single-channel radio frequency signal into a single-channel baseband signal.
Specifically, after receiving the single-channel rf signal sent by the sender, the receiver may perform frequency conversion on the single-channel rf signal, and convert the single-channel rf signal into a single-channel baseband signal, where a specific processing manner of the single-channel rf signal is the same as a processing manner of a related process in the prior art, and is not described herein again.
Step 302, the receiver multiplies the single baseband signal by a corresponding K-order orthogonal code in a second preset K-order orthogonal code set, and performs corresponding integration on the obtained result to obtain N paths of parallel signal streams.
Specifically, in the embodiment of the present invention, in order to restore the single rf signal sent by the transmitter into an information stream, after the single rf signal is converted into a single baseband signal, the receiver may multiply the single baseband signal by the corresponding K-order orthogonal codes in the second preset set, and perform corresponding integration on the obtained result, so as to obtain N parallel signal streams.
The second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer less than M, and K is not less than N.
The receiver multiplies the single-baseband signals by the corresponding K-order orthogonal codes in the second preset K-order orthogonal code set respectively, and performs corresponding integration on the obtained results respectively, which can be realized by the following formula:
wherein, Wi KThe K-order orthogonal codes in a second preset K-order orthogonal code set are obtained; t is the period of the K-order orthogonal codes in the first preset K-order orthogonal code set and the second preset K-order orthogonal code set, S is a single-channel baseband signal obtained after the receiver processes, and i is more than or equal to 0 and less than or equal to N-1.
Due to the fact thatSince the value is 0 in i ≠ j, only M of the N parallel signal streams obtained through the integration processing are non-null signal streams.
Step 303, the receiver performs parallel-to-serial conversion on the N parallel signal streams, and outputs the obtained information stream.
Specifically, after the receiver performs the processing in step 302, N parallel signal streams are obtained, and the transmitter may further perform parallel-to-serial conversion on the N parallel signal streams and output the obtained single information stream.
Further, in the embodiment of the present invention, when the transmitter performs serial-to-parallel conversion on the input information stream, the transmitter may further perform space-time coding on each obtained information stream, further multiply each information stream in the obtained M channels of space-time coded parallel information streams with a corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and sum the obtained results.
Correspondingly, after the receiver processes the received single-channel radio frequency signal into N parallel signal streams, if the N parallel signal streams are space-time coded parallel signal streams, the receiver further needs to perform space-time decoding on the N space-time coded parallel signal streams, perform parallel-to-serial conversion on the space-time decoded N parallel signal streams, and output the obtained information stream.
In order to better understand the technical solution provided by the embodiment of the present invention, the technical solution provided by the embodiment of the present invention is described in more detail below with reference to a specific application scenario.
In this embodiment, taking N = M = K as an example, the first predetermined K-th order orthogonal code set and the second predetermined K-th order orthogonal code set are both described
Wherein,is an M-order orthogonal code, and satisfies the following conditions:
when m is equal to n, the compound is, <math>
<mrow>
<msubsup>
<mo>∫</mo>
<mn>0</mn>
<mi>T</mi>
</msubsup>
<mrow>
<mo>(</mo>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mi>M</mi>
</msubsup>
<mo>×</mo>
<msubsup>
<mi>W</mi>
<mi>n</mi>
<mi>M</mi>
</msubsup>
<mo>)</mo>
</mrow>
<mi>dt</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
</math>
when m is not equal to n, the number of the n, <math>
<mrow>
<msubsup>
<mo>∫</mo>
<mn>0</mn>
<mi>T</mi>
</msubsup>
<mrow>
<mo>(</mo>
<msubsup>
<mi>W</mi>
<mi>m</mi>
<mi>M</mi>
</msubsup>
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<msubsup>
<mi>W</mi>
<mi>n</mi>
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</msubsup>
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<mo>=</mo>
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</mrow>
</math>
wherein M and n are integers, M is more than or equal to 0, and M-1 is more than or equal to n.
Referring to fig. 4A, in this embodiment, after receiving the input information stream, the transmitter can convert the input information stream into M parallel signal streams x in serial-parallel manner1C″,x2C″,x3C″,...xMCAnd respectively connecting the M paths of parallel signals with M-order orthogonal codesMultiplying the phase M1 to obtainAnd C, summing the signals to obtain a single-path baseband signal xC', further performing RF conversion to obtain a single RF signal xC。
Referring to fig. 4B, taking signal transmission in an ideal state as an example (i.e. interference caused by various factors such as noise is not considered), the receiver receives a single-channel rf signal x sent by the transmitterCThen, it can be converted into a single-path baseband signal xC' and further the single-channel baseband signal is respectively connected withAnd integratedTo obtain y1C′,y2C′,y3C′,...yNC' and then obtaining single-path information stream output through parallel-serial conversion.
Wherein, when m is equal to n,when m is not equal to n, the number of the n,thus, y can be derivedkC′＝xkC"; k is a positive integer not greater than N.
As can be seen from the above description, in the embodiment of the present invention, for the sender side, the sender performs serial-to-parallel conversion on the input information stream to obtain M parallel information streams; multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and summing the obtained results; and converting the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sending the single-path radio frequency signal to a receiver. For the receiver side, the receiver receives the single-channel radio frequency signal sent by the sender and converts the single-channel radio frequency signal into a single-channel baseband signal; multiplying the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performing corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; and the N paths of parallel signal streams are subjected to parallel-serial conversion, and the obtained information streams are output, so that the requirement for realizing code division Multiple Input Multiple Output (MIMO) communication is reduced, and the power consumption of equipment is reduced.
Based on the same technical concept, the embodiment of the invention also provides a transmitter, which can be applied to the method embodiment.
As shown in fig. 5, a schematic structural diagram of a transmitter according to an embodiment of the present invention, where the transmitter is applicable to a code division single antenna multi-stream information transceiving system including a receiver, the transmitter may include:
a serial-to-parallel conversion unit 51, configured to perform serial-to-parallel conversion on an input information stream to obtain M parallel information streams;
the processing unit 52 is configured to multiply each of the M parallel information streams by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set, and sum the obtained results; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
and the radio frequency transmitter unit 53 is configured to convert the single-channel baseband signal obtained by summing the processing units into a single-channel radio frequency signal, and send the single-channel radio frequency signal to the receiver.
The serial-parallel conversion unit 51 is specifically configured to perform serial-parallel conversion on an input information stream, and perform space-time coding on M parallel information streams obtained through serial-parallel conversion to obtain M parallel information streams subjected to space-time coding;
the processing unit 52 is specifically configured to multiply each information stream in the M channels of space-time coded parallel information streams with a corresponding K-order orthogonal code in a first preset K-order orthogonal code set, and sum an obtained result.
Based on the same technical concept, the embodiment of the invention also provides a receiver which can be applied to the method embodiment.
As shown in fig. 6, a schematic structural diagram of a receiver according to an embodiment of the present invention, where the receiver is applicable to a code division single antenna multi-stream information transceiving system including a transmitter, and the receiver may include:
a radio frequency receiver unit 61, configured to receive a single-channel radio frequency signal sent by a transmitter, and convert the single-channel radio frequency signal into a single-channel baseband signal; the single-channel radio frequency signal is obtained by the transmitter performing serial-parallel conversion on input information to obtain M channels of parallel information streams, multiplying each channel of information stream in the M channels of parallel information streams by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, summing obtained results and then converting the summed result; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the processing unit 62 is configured to multiply the single-channel baseband signal by a corresponding K-order orthogonal code in a second preset K-order orthogonal code set, and perform corresponding integration on the obtained results to obtain N channels of parallel signal streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N;
and a parallel-to-serial conversion unit 63, configured to perform parallel-to-serial conversion on the N parallel signal streams, and output an obtained information stream.
The parallel-to-serial conversion unit 63 is specifically configured to, when the N parallel signal streams are space-time coded parallel signal streams, perform space-time decoding on the N space-time coded parallel signal streams, perform parallel-to-serial conversion on the space-time decoded N parallel signal streams, and output an obtained information stream.
Based on the same technical concept, the embodiment of the invention also provides a code division single-antenna multi-stream information transceiving system, which can be applied to the method embodiment.
As shown in fig. 7, a schematic structural diagram of a code division single-antenna multi-stream information transceiving system according to an embodiment of the present invention may include: a transmitter 71 and a receiver 72, wherein:
the transmitter 71 is configured to perform serial-to-parallel conversion on an input information stream to obtain M parallel information streams; multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and summing the obtained results; converting the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sending the single-path radio frequency signal to a receiver; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the receiver 72 is configured to receive the single-channel radio frequency signal sent by the sender, and convert the single-channel radio frequency signal into a single-channel baseband signal; multiplying the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performing corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; performing parallel-serial conversion on the N paths of parallel signal streams, and outputting the obtained information streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling a terminal device (which may be a mobile phone, a personal computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (9)
1. A code division single antenna multi-stream information sending method is applied to a code division single antenna multi-stream information receiving and sending system comprising a sender and a receiver, and the method comprises the following steps:
the transmitter carries out serial-parallel conversion on the input information flow to obtain M paths of parallel information flows;
the sender multiplies each information flow in the M parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and sums the obtained results; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
and the sender converts the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sends the single-path radio frequency signal to the receiver.
2. The method of claim 1,
the transmitter performs serial-to-parallel conversion on the input information stream to obtain M parallel information streams, specifically:
the transmitter carries out serial-parallel conversion on the input information stream and carries out space-time coding on the M paths of parallel information streams obtained by the serial-parallel conversion to obtain M paths of parallel information streams after the space-time coding;
the sender multiplies each information flow in the M parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and sums the obtained results, specifically:
and the transmitter multiplies each path of information flow in the M paths of space-time coded parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and sums the obtained results.
3. A code division single antenna multi-stream information receiving method is characterized in that the method is applied to a code division single antenna multi-stream information receiving and sending system comprising a sender and a receiver, and the method comprises the following steps:
the receiver receives a single-path radio frequency signal sent by the sender and converts the single-path radio frequency signal into a single-path baseband signal; the single-channel radio frequency signal is obtained by the transmitter performing serial-parallel conversion on input information to obtain M channels of parallel information streams, multiplying each channel of information stream in the M channels of parallel information streams by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, summing obtained results and then converting the summed result; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the receiver multiplies the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performs corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N;
and the receiver performs parallel-serial conversion on the N paths of parallel signal streams and outputs the obtained information stream.
4. The method according to claim 3, wherein the receiver performs parallel-to-serial conversion on the N parallel signal streams and outputs the obtained information streams, specifically:
and when the N paths of parallel signal streams are space-time coded parallel signal streams, the receiver performs space-time decoding on the N paths of space-time coded parallel signal streams, performs parallel-serial conversion on the space-time decoded N paths of parallel signal streams, and outputs the obtained information streams.
5. A transmitter for use in a code division single antenna multiple stream messaging system including a receiver, the transmitter comprising:
the serial-parallel conversion unit is used for performing serial-parallel conversion on the input information flow to obtain M paths of parallel information flows;
the processing unit is used for multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively and summing the obtained results; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
and the radio frequency transmitter unit is used for converting the single-path baseband signals obtained by summing the processing units into single-path radio frequency signals and then transmitting the single-path radio frequency signals to the receiver.
6. The transmitter of claim 5,
the serial-parallel conversion unit is specifically used for performing serial-parallel conversion on the input information stream and performing space-time coding on the M parallel information streams obtained through the serial-parallel conversion to obtain M parallel information streams subjected to space-time coding;
the processing unit is specifically configured to multiply each information stream in the M channels of space-time coded parallel information streams with a corresponding K-order orthogonal code in a first preset K-order orthogonal code set, and sum an obtained result.
7. A receiver for use in a code division single antenna multiple stream messaging system including a transmitter, the receiver comprising:
the radio frequency receiver unit is used for receiving a single-channel radio frequency signal sent by the sender and converting the single-channel radio frequency signal into a single-channel baseband signal; the single-channel radio frequency signal is obtained by the transmitter performing serial-parallel conversion on input information to obtain M channels of parallel information streams, multiplying each channel of information stream in the M channels of parallel information streams by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, summing obtained results and then converting the summed result; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the processing unit is used for multiplying the single-path baseband signal by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively and performing corresponding integration on the obtained results respectively to obtain N paths of parallel signal streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N;
and the parallel-serial conversion unit is used for performing parallel-serial conversion on the N paths of parallel signal streams and outputting the obtained information streams.
8. The receiver of claim 7,
the parallel-to-serial conversion unit is specifically configured to, when the N parallel signal streams are space-time coded parallel signal streams, perform space-time decoding on the N space-time coded parallel signal streams, perform parallel-to-serial conversion on the space-time decoded N parallel signal streams, and output an obtained information stream.
9. A code division single antenna multiple stream information transceiving system, comprising a transmitter and a receiver, wherein:
the transmitter is used for performing serial-parallel conversion on the input information flow to obtain M paths of parallel information flows; multiplying each path of information flow in the M paths of parallel information flows by a corresponding K-order orthogonal code in a first preset K-order orthogonal code set respectively, and summing the obtained results; converting the single-path baseband signal obtained by summation into a single-path radio frequency signal and then sending the single-path radio frequency signal to a receiver; the first preset K-order orthogonal code comprises M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K, M is a positive integer, and K is not less than M;
the receiver is used for receiving the single-channel radio frequency signal sent by the sender and converting the single-channel radio frequency signal into a single-channel baseband signal; multiplying the single-path baseband signals by corresponding K-order orthogonal codes in a second preset K-order orthogonal code set respectively, and performing corresponding integration on obtained results respectively to obtain N paths of parallel signal streams; performing parallel-serial conversion on the N paths of parallel signal streams, and outputting the obtained information streams; the second preset K-order orthogonal code set comprises N K-order orthogonal codes, and the first preset K-order orthogonal code set is a subset of the second preset K-order orthogonal code set; n is a positive integer not less than M, and K is not less than N.
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