CN104716999A - Code-division single antenna multithread information sending and receiving method, equipment and system - Google Patents

Abstract

The invention discloses a code division single antenna multi-stream information sending and receiving method, device and system. In the present invention, for the transmitter side, serial-to-parallel conversion is performed on the input information flow to obtain M parallel information flows; The corresponding K-order orthogonal codes in the set are multiplied, and the obtained results are summed; the single-channel baseband signal obtained by the summation is converted into a single-channel radio frequency signal and sent to the receiver. For the receiver side, the single-channel radio frequency signal sent by the transmitter is received, and the single-channel radio frequency signal is converted into a single-channel baseband signal; The order orthogonal codes are multiplied, and the obtained results are respectively integrated to obtain N parallel signal streams; parallel-to-serial conversion is performed on the N parallel signal streams, and the obtained information streams are output, reducing code division MIMO communication. implementation requirements and reduces device power consumption.

Description

A code division single antenna multi-stream information transmission and reception method, device and system

technical field

The invention relates to the field of communication technology, in particular to a code division single antenna multi-stream information sending and receiving method, device and system.

Background technique

In the prior art, the realization of the MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) system is based on the multi-antenna communication system. The N*M antenna MIMO transceiver system is shown in Figure 1.

The principle of the N-antenna MIMO transceiver is as follows: at the transmitter end, the information flow is transformed into a parallel information flow through a serial-to-parallel conversion system (the serial-to-parallel conversion system may include functions such as space-time coding), and then the parallel information is The stream is processed through modulation and amplification and sent through multiple antennas. At the receiver side, the signal is received by multiple antennas and converted into a baseband signal through demodulation and other processing, and then the information flow is restored through the parallel-serial conversion system (the parallel-serial conversion system may include functions such as space-time decoding or channel estimation) .

Taking the system architecture shown in Figure 1 as an example,

Let the transmitting antenna be: X _M =[x ₁ , x ₂ , x ₃ …x _M ] (1)

The receiving antenna is: Y _N =[y ₁ , y ₂ , y ₃ …y _N ] (2)

Assuming that the RF transmitter and RF receiver are in the linear working area, and the gains of each channel are equal:

x ₁ =Ax ₁ ′, x ₂ =Ax ₂ ′…, x _M =Ax _M ′ (3)

y ₁ ′=By ₁ , y ₂ ′=By ₂ ..., y _N ′=By _N (4)

Among them, A and B are constants.

The channel matrix is:

${\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; m</span>}}<span\; class="notranslate">\; =</span>\left[\begin{array}{cccc}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 11</span>}}& {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 12</span>}}& <span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>& {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}\mathrm{<span\; class="notranslate">\; m</span>}}\\ {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; one</span>}}& {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; two</span>}}& <span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>& {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; m</span>}}\\ <span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>& <span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>& <span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>& <span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span>\\ {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}& {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}& <span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span>& {\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; N\; M</span>}}\end{array}\right]<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span>$

but:

Y _N ＝H _N×M +X _M (6)

Among them, n is the channel noise vector.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

1) To realize the performance of MIMO spatial multiplexing, the multipath channel condition must be satisfied, and multiple antennas must be non-correlated. It can be seen from formula (6) that to restore the receiving antenna end X _M from the receiving antenna Y _N needs to take the inverse matrix of the channel matrix H _N×M , if the channel is a strongly correlated channel, the inverse matrix cannot be taken;

2) The multi-antenna MIMO transceiver needs to use multiple radio frequency transceivers, which also results in a multiplied increase in power consumption. Especially for the doubling of power consumption of terminal products, the standby time is greatly shortened;

3) The index test of multi-antenna MIMO products, especially the OTA index test, is a major problem in the industry. At present, there are more than three test methods for OTA testing of multi-antenna MIMO products in the industry, and each test method is relatively complicated and the test cost is high.

Contents of the invention

The invention provides a code division single antenna multi-stream information sending and receiving method, device and system, which are used to reduce the requirements for realizing code division MIMO communication and reduce power consumption of the equipment.

In order to achieve the above object, the embodiment of the present invention provides a code division single antenna multi-stream information transmission method, which is applied to a code division single antenna multi-stream information sending and receiving system including a transmitter and a receiver. The method includes:

The transmitter performs serial-to-parallel conversion on the input information stream to obtain M parallel information streams;

The transmitter multiplies each of the M parallel information streams by the corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and sums the obtained results; Wherein, the first preset K-order orthogonal code includes M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams of each channel are different from each other, K and M are positive integers, and K is not less than M;

The transmitter converts the single baseband signal obtained by the summation into a single radio frequency signal and sends it to the receiver.

The embodiment of the present invention also provides a method for receiving code-division single-antenna multi-stream information, which is applied to a code-division single-antenna multi-stream information receiving and receiving system including a transmitter and a receiver. The method includes:

The receiver receives the single-channel radio frequency signal sent by the transmitter, and converts the single-channel radio frequency signal into a single-channel baseband signal; wherein, the single-channel radio frequency signal is serially paralleled by the transmitter to the input information M parallel information streams are obtained by conversion, each information stream in the M parallel information streams is multiplied by the corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and the obtained result is calculated After summing, the results obtained by summing are converted; wherein, the first preset K-order orthogonal code includes M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams of each channel are different from each other, K and M are positive integers, and K is not less than M;

The receiver multiplies the single-channel baseband signal by the corresponding K-order orthogonal code in the second preset K-order orthogonal code set, and performs corresponding integration on the obtained results to obtain N-channel parallel signals stream; wherein, the second preset K-order orthogonal code set includes N K-order orthogonal codes, and the first preset K-order orthogonal code set is the second preset K-order orthogonal code A subset of a set; N is a positive integer not less than M, and K is not less than N;

The receiver performs parallel-to-serial conversion on the N parallel signal streams, and outputs the obtained information streams.

The embodiment of the present invention also provides a transmitter, which is applied to a code-division single-antenna multi-stream information sending and receiving system including a receiver, and the transmitter includes:

A serial-to-parallel conversion unit, configured to perform serial-to-parallel conversion on the input information flow to obtain M parallel information flows;

A processing unit, configured to multiply each of the M parallel information streams by the corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and sum the obtained results; Wherein, the first preset K-order orthogonal code includes M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams of each channel are different from each other, K and M are positive integers, and K is not less than M;

The radio frequency transmitter unit is used to convert the single baseband signal obtained by summing the processing unit into a single radio frequency signal and send it to the receiver.

The embodiment of the present invention also provides a receiver, which is applied to a code-division single-antenna multi-stream information sending and receiving system including a transmitter, and the receiver includes:

The radio frequency receiver unit is used to receive the single-channel radio frequency signal sent by the transmitter, and convert the single-channel radio frequency signal into a single-channel baseband signal; wherein, the single-channel radio frequency signal is input by the transmitter pair Serial-to-parallel conversion of the information to obtain M parallel information streams, and multiply each information stream in the M parallel information streams by the corresponding K-order orthogonal codes in the first preset K-order orthogonal code set, and After the obtained results are summed, the results obtained by the summation are converted; wherein, the first preset K-order orthogonal code includes M K-order orthogonal codes; the corresponding information streams of each channel K-order orthogonal codes are different from each other, K and M are positive integers, and K is not less than M;

A processing unit, configured to multiply the single-channel baseband signal by the corresponding K-order orthogonal code in the second preset K-order orthogonal code set, and perform corresponding integration on the obtained results to obtain N-channel parallel Signal flow; wherein the second preset K-order orthogonal code set includes N K-order orthogonal codes, and the first preset K-order orthogonal code set is the second preset K-order orthogonal code A subset of a set; N is a positive integer not less than M, and K is not less than N;

The parallel-to-serial conversion unit is configured to perform parallel-to-serial conversion on the N parallel signal streams, and output the obtained information streams.

The embodiment of the present invention also provides a code division single-antenna multi-stream information sending and receiving system, including a transmitter and a receiver, wherein:

The transmitter is used to perform serial-to-parallel conversion on the input information stream to obtain M parallel information streams; each information stream in the M parallel information streams is respectively combined with the first preset K-order orthogonal code set The corresponding K-order orthogonal codes are multiplied, and the obtained results are summed; the single-channel baseband signal obtained by the summation is converted into a single-channel radio frequency signal and then sent to the receiver; wherein, the first preset Assume that the K-order orthogonal codes include M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K and M are positive integers, and K is not less than M;

The receiver is configured to receive the single radio frequency signal sent by the transmitter, and convert the single radio frequency signal into a single baseband signal; Multiply the corresponding K-order orthogonal codes in the K-order orthogonal code set, and perform corresponding integration on the obtained results to obtain N parallel signal streams; perform parallel-to-serial conversion on the N parallel signal streams, and The obtained information flow is output; wherein, the second preset K-order orthogonal code set includes N K-order orthogonal codes, and the first preset K-order orthogonal code set is the second preset K-order orthogonal code set. A subset of the order orthogonal code set; N is a positive integer not less than M, and K is not less than N.

In the above embodiments of the present invention, for the sender side, the sender performs serial-to-parallel conversion on the input information flow to obtain M parallel information flows; Multiply the corresponding K-order orthogonal codes in the preset K-order orthogonal code set, and sum the obtained results; convert the single-channel baseband signal obtained by the summation into a single-channel radio frequency signal and send it to the receiver . For the receiver side, the receiver receives the single radio frequency signal sent by the transmitter, and converts the single radio frequency signal into a single baseband signal; The corresponding K-order orthogonal codes in the K-order orthogonal code set are multiplied, and the obtained results are respectively integrated to obtain N parallel signal streams; parallel-to-serial conversion is performed on the N parallel signal streams, and The obtained information stream output reduces the requirements for the realization of code division MIMO communication and reduces the power consumption of the equipment.

Description of drawings

FIG. 1 is a schematic diagram of an M*N antenna MIMO transceiver system architecture in the prior art;

FIG. 2 is a schematic flow diagram of a method for transmitting code-division single-antenna multi-stream information provided by an embodiment of the present invention;

3 is a schematic flow diagram of a code division single antenna multi-stream information receiving method provided by an embodiment of the present invention;

FIG. 4A is a schematic structural diagram of a code division single antenna information transmitter provided by an embodiment of the present invention;

FIG. 4B is a schematic structural diagram of a code division single antenna information receiver provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a transmitter provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a receiver provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a code division single antenna multi-stream information sending and receiving system provided by an embodiment of the present invention.

Detailed ways

In view of the above-mentioned problems in the prior art, the embodiment of the present invention provides a technical solution for sending and receiving code-division single-antenna multi-stream information, which is applied to a code-division single-antenna multi-stream information sending and receiving system including a transmitter and a receiver . In this technical solution, for the sender side, the sender performs serial-to-parallel conversion on the input information flow to obtain M parallel information flows; Multiply the corresponding K-order orthogonal codes in the K-order orthogonal code set, and sum the obtained results; convert the single-channel baseband signal obtained by the summation into a single-channel radio frequency signal and send it to the receiver. For the receiver side, the receiver receives the single radio frequency signal sent by the transmitter, and converts the single radio frequency signal into a single baseband signal; Multiply the corresponding K-order orthogonal codes in the K-order orthogonal code set, and perform corresponding integration on the obtained results to obtain N parallel signal streams; perform parallel-to-serial conversion on the N parallel signal streams, and The obtained information stream output reduces the requirements for the realization of code division MIMO communication and reduces the power consumption of the equipment.

Wherein, in the embodiment of the present invention, the first preset K-order orthogonal codes include M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other; the first Two preset K-order orthogonal code sets include 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 and N are positive integers, and K is not less than M and N, and N is not less than M.

The technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Apparently, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

As shown in FIG. 2 , it is a schematic flowchart of a method for transmitting code-division single-antenna multi-stream information provided by an embodiment of the present invention, which may include the following steps:

Step 201, the transmitter performs serial-to-parallel conversion on the input information flow to obtain M parallel information flows.

Specifically, the specific processing method for the transmitter to serially convert the input information flow into M parallel information flows is the same as the serial-parallel conversion processing method in the prior art, and will not be repeated here.

Wherein, 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 transmitter multiplies each of the M parallel information streams by the corresponding K-order orthogonal code in the 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 can combine it with the first Multiply the corresponding K-order orthogonal codes in a preset K-order orthogonal code set, and sum the results of multiplying each information flow in the M parallel information streams with the corresponding K-order orthogonal codes, To get a single baseband signal.

Wherein, the first preset set of K-order orthogonal codes includes M K-order orthogonal codes; the K-order orthogonal codes corresponding to the above information streams are different from each other, and K is a positive integer not less than M.

Step 203, the transmitter converts the single baseband signal obtained by the summation into a single radio frequency signal and sends it to the receiver.

Specifically, the transmitter obtains a single baseband signal after processing in step 202, and the transmitter may further perform frequency conversion processing on the single baseband signal to convert the single baseband signal into a single 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 will not be repeated here.

After processing in steps 201-203, the transmitter processes the input information flow into a single radio frequency signal and sends it to the receiver. After receiving the single-channel radio frequency signal, the receiver may restore the single-channel radio frequency signal, and its specific implementation may refer to FIG. 3 .

As shown in FIG. 3 , a schematic flow diagram of a code division single antenna multi-stream information receiving method provided by an embodiment of the present invention may include the following steps:

Step 301. The receiver receives a single radio frequency signal sent by a transmitter, and converts the single radio frequency signal into a single baseband signal.

Specifically, after receiving the single-channel radio frequency signal sent by the transmitter, the receiver can perform frequency conversion processing on the single-channel radio frequency signal to convert it into a single-channel baseband signal. The specific processing method is the same as that of the related process in the prior art. The processing method is the same and will not be repeated here.

Step 302: The receiver multiplies the single-channel baseband signal by the corresponding K-order orthogonal code in the second preset K-order orthogonal code set, and performs corresponding integration on the obtained results to obtain N-channel parallel signal flow.

Specifically, in the embodiment of the present invention, in order to restore and process the single radio frequency signal sent by the transmitter into an information stream, after converting the single radio frequency signal into a single baseband signal, the receiver can convert the single radio frequency signal into a single baseband signal. The signals are respectively multiplied by the corresponding K-order orthogonal codes in the second preset set, and the obtained results are respectively integrated correspondingly to obtain N parallel signal streams.

Wherein, the second preset K-order orthogonal code set includes 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.

Wherein, the receiver multiplies the single-channel baseband signal by the corresponding K-order orthogonal code in the second preset K-order orthogonal code set, and performs corresponding integration on the obtained results, which can be realized by the following formula:

${<span\; class="notranslate">\; \&Integral;</span>}_{\mathrm{<span\; class="notranslate">\; 0</span>}}^{\mathrm{<span\; class="notranslate">\; T</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \&times;</span>{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}^{\mathrm{<span\; class="notranslate">\; K</span>}}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; dt</span>}$

Among them, W _i ^K is the K-order orthogonal code in the second preset K-order orthogonal code set; T is K in the first preset K-order orthogonal code set and the second preset K-order orthogonal code set The period of the order orthogonal code, S is the single-channel baseband signal obtained after processing by the receiver, and 0≤i≤N-1.

because When i≠j, the value is 0, therefore, after the above integral processing, among the N channels of parallel signal streams obtained, only M channels are non-empty signal streams.

Step 303: The receiver performs parallel-to-serial conversion on the N parallel signal streams, and outputs the obtained information streams.

Specifically, after the receiver is processed in step 302, it obtains N parallel signal streams, and the transmitter can further perform parallel-to-serial conversion on the N parallel signal streams, and output the obtained single information stream. The specific implementation method The processing method is the same as that of the related process in the prior art, and will not be repeated here.

Further, in the embodiment of the present invention, when the transmitter performs serial-to-parallel conversion on the input information stream, it can also perform space-time coding on the obtained information streams, and further, the obtained M channels of space-time coded Each information flow in the parallel information flow is multiplied by the corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and the obtained results are summed.

Correspondingly, after the receiver processes the received single radio frequency signal into N parallel signal streams, if the N parallel signal streams are space-time coded parallel signal streams, the receiver also needs to Space-time decoding is performed on the space-time coded parallel signal streams, parallel-to-serial conversion is performed on the space-time decoded N parallel signal streams, and the obtained information streams are output.

In order to better understand the technical solutions provided by the embodiments of the present invention, the technical solutions provided by the embodiments of the present invention will be described in more detail below in conjunction with specific application scenarios.

In this embodiment, taking N=M=K as an example for description, the first preset K-order orthogonal code set and the second preset K-order orthogonal code set are both

in, is an M-order orthogonal code, which satisfies the following conditions:

When m=n, ${\&Integral;}_0^T(W_m^m\&times;W_{\mathrm{no}}^m)\mathrm{dt}=1$

When m≠n, ${\&Integral;}_0^T(W_m^m\&times;W_{\mathrm{no}}^m)\mathrm{dt}=0$

Wherein, m and n are integers, and 0≤m, n≤M-1.

Referring to Fig. 4A, in this embodiment, after the transmitter receives the input information stream, it can serially convert it into M parallel signal streams x _1C ", x _2C ", x _3C ",...x _MC ", and the M parallel signals are respectively combined with the M-order orthogonal code Multiply by M1 to get .After the summation by C, a single baseband signal x _C ′ is obtained, and then a radio frequency conversion is performed to obtain a single radio frequency signal x _C .

Referring to Figure 4B, taking signal transmission in an ideal state as an example (that is, without considering the interference of various factors such as noise), after the receiver receives the single-channel RF signal x _C sent by the transmitter, it can be converted into a single-channel baseband signal x _C ’, and then the single baseband signal and and make points Obtain y _1C ′, y _2C ′, y _3C ′,...y _NC ′, and then obtain a single information flow output through parallel-to-serial conversion.

Among them, since when m=n, When m≠n, Therefore, it can be obtained that y _kC ′=x _kC ″; k is a positive integer not greater than N.

It can be seen from the above description that in the embodiment of the present invention, for the transmitter side, the transmitter performs serial-to-parallel conversion on the input information flow to obtain M parallel information flows; each of the M parallel information flows The information streams of the channels are respectively multiplied by the corresponding K-order orthogonal codes in the first preset K-order orthogonal code set, and the obtained results are summed; the single-channel baseband signal obtained by the summation is converted into a single-channel The radio frequency signal is then sent to the receiver. For the receiver side, the receiver receives the single radio frequency signal sent by the transmitter, and converts the single radio frequency signal into a single baseband signal; Multiply the corresponding K-order orthogonal codes in the K-order orthogonal code set, and perform corresponding integration on the obtained results to obtain N parallel signal streams; perform parallel-to-serial conversion on the N parallel signal streams, and The obtained information stream output reduces the requirements for the realization of code division MIMO communication and reduces the power consumption of the equipment.

Based on the same technical concept, the embodiment of the present invention also provides a transmitter, which can be applied to the above method embodiment.

As shown in Figure 5, it is a schematic structural diagram of a transmitter provided by an embodiment of the present invention. The transmitter can be applied to a code-division single-antenna multi-stream information transceiver system including a receiver. The transmitter can include:

A serial-to-parallel conversion unit 51, configured to perform serial-to-parallel conversion on the input information flow to obtain M parallel information flows;

A processing unit 52, configured to multiply each of the M parallel information streams by the corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and sum the obtained results ; Wherein, 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, K and M are positive integers, and K Not less than M;

The radio frequency transmitter unit 53 is configured to convert the single baseband signal obtained by summing the processing units into a single radio frequency signal and send it to the receiver.

Wherein, the serial-to-parallel conversion unit 51 is specifically configured to perform serial-to-parallel conversion on the input information stream, and perform space-time encoding on the M parallel information streams obtained by the serial-to-parallel conversion, to obtain M-channel space-time encoded parallel information flow;

The processing unit 52 is specifically configured to multiply each of the information streams in the M space-time coded parallel information streams by the corresponding K-order orthogonal codes in the first preset K-order orthogonal code set, and sum the obtained results.

Based on the same technical concept, the embodiment of the present invention also provides a receiver, which can be applied to the above method embodiment.

As shown in Figure 6, it is a schematic structural diagram of a receiver provided by an embodiment of the present invention. The receiver can be applied to a code-division single-antenna multi-stream information sending and receiving system including a transmitter. The receiver can include:

The radio frequency receiver unit 61 is used to receive the single-channel radio frequency signal sent by the transmitter, and convert the single-channel radio frequency signal into a single-channel baseband signal; wherein, the single-channel radio frequency signal is generated by the transmitter. The input information is serial-to-parallel converted to obtain M parallel information streams, and each information stream in the M parallel information streams is multiplied by the corresponding K-order orthogonal code in the first preset K-order orthogonal code set, and After summing the obtained results, converting the summed results; wherein, the first preset K-order orthogonal codes include M K-order orthogonal codes; the information streams correspond to The K-order orthogonal codes of are different from each other, K and M are positive integers, and K is not less than M;

The processing unit 62 is configured to multiply the single-channel baseband signal by the corresponding K-order orthogonal code in the second preset K-order orthogonal code set, and perform corresponding integration on the obtained results to obtain N-channel Parallel signal flow; wherein the second preset K-order orthogonal code set includes N K-order orthogonal codes, and the first preset K-order orthogonal code set is the second preset K-order orthogonal code set A subset of the code set; N is a positive integer not less than M, and K is not less than N;

A parallel-to-serial conversion unit 63, configured to perform parallel-to-serial conversion on the N parallel signal streams, and output the obtained information streams.

Wherein, the parallel-to-serial conversion unit 63 is specifically configured to perform space-time decoding on the N space-time encoded parallel signal streams when the N parallel signal streams are space-time encoded parallel signal streams, And perform parallel-to-serial conversion on the N parallel signal streams after space-time decoding, and output the obtained information streams.

Based on the same technical concept, the embodiment of the present invention also provides a code division single-antenna multi-stream information sending and receiving system, which can be applied to the above-mentioned method embodiment.

As shown in FIG. 7, a schematic structural diagram of a code division single antenna multi-stream information transceiving system provided by an embodiment of the present invention may include: a transmitter 71 and a receiver 72, wherein:

The transmitter 71 is used to perform serial-to-parallel conversion on the input information stream to obtain M parallel information streams; each information stream in the M parallel information streams is respectively combined with the first preset K-order orthogonal code Multiply the corresponding K-order orthogonal codes in the set, and sum the obtained results; convert the single-channel baseband signal obtained by the summation into a single-channel radio frequency signal and send it to the receiver; wherein, the first The preset K-order orthogonal codes include M K-order orthogonal codes; the K-order orthogonal codes corresponding to the information streams are different from each other, K and M are positive integers, and K is not less than M;

The receiver 72 is configured to receive the single-channel radio frequency signal sent by the transmitter, and convert the single-channel radio frequency signal into a single-channel baseband signal; Assume that the corresponding K-order orthogonal codes in the K-order orthogonal code set are multiplied, and the obtained results are respectively integrated to obtain N parallel signal streams; parallel-to-serial conversion is performed on the N parallel signal streams, and Output the obtained information flow; wherein, the second preset K-order orthogonal code set includes N K-order orthogonal codes, and the first preset K-order orthogonal code set is the second preset A subset of the K-order orthogonal code set; N is a positive integer not less than M, and K is not less than N.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A terminal device (which may be a mobile phone, a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection 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.