WO2018130041A1

WO2018130041A1 - Multiple access method and apparatus, and communication system, and computer storage medium

Info

Publication number: WO2018130041A1
Application number: PCT/CN2017/115996
Authority: WO
Inventors: 严春林; 袁志锋; 袁弋非; 李卫敏
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-01-12
Filing date: 2017-12-13
Publication date: 2018-07-19
Also published as: CN108306707A; CN108306707B

Abstract

Proposed are a multiple access method and apparatus, and a communication system and a computer storage medium. The method comprises: performing binary domain or multi-domain channel encoding on data streams to obtain a plurality of binary domain or multi-domain encoded data; performing binary domain or multi-domain spread spectrum on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data; mapping the binary domain or multi-domain spread spectrum data into modulated signals for sending; if the number of the data streams is singular, sending a modulated signal corresponding to the single data stream; and if the number of the data streams is multiple, performing constellation rotation and power scaling on the modulated signals for each path of data streams and then superimposing same together for sending. In order to increase flexibility and enhance performance, interleaver and scrambling can be further used to distinguish user and randomized multi-user interference. The present invention does not use repeated spread spectrum, but uses binary domain/multi-domain sequence spread spectrum, and uses binary domain/multi-domain channel encoding in channel encoding. The advantages of using multi-domain spread spectrum and multi-domain channel encoding are that extra modulation diversity gain can be obtained and a better performance than that based on the binary domain spread spectrum and the binary domain channel encoding is obtained, so that the overall performance of non-orthogonal multiple addresses is greatly improved. Using multi-stream transmission can effectively improve single-user spectrum efficiency.

Description

Method, device and communication system for multiple access, computer storage medium

Cross-reference to related applications

The present application is based on a Chinese patent application filed on Jan. 12, 2017, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, a communication system, and a computer storage medium for multiple access.

Background technique

Multiple access technology is one of the key technologies of wireless communication. In the era of 5G (5th-Generation, fifth-generation mobile communication technology), the Internet of Things will have a great development, and there will be 10 billion links in the future. In order to support such a large number of physical links, a new multiple access scheme is needed. After research, the industry has reached a consensus that non-orthogonal multiple access will be adopted to increase the number of concurrently accessible users.

At present, the non-orthogonal multiple access technology proposed by the domestic company mainly uses MUSA (Multi-user shared access) access method, SCMA (Sparse code multiple access) access method, PDMA (SDMA). Pattern division multiple access, access method and IDMA (Interleaver-division multiple access) access method.

Among them, MUSA uses a large number of multi-dimension short spreading sequences to spread user data and share the same resource block to transmit user data. With short spreading sequences, the user channel matrix has a lower dimension and less processing complexity. The conventional spreading sequence uses a binary spreading sequence. Figure 1 is a block diagram of MUSA. The user data is modulated by binary channel coding, and the modulated symbols are subjected to complex spreading. The use of binary sequences limits the number of low cross-correlation sequences that are generated, so it is difficult to support a large number of users. Access. With complex spreading sequences, a large number of low cross-correlation spreading sequences are easily generated, and low cross-correlation spreading sequences reduce interference between multiple users, which can support a large number of users.

However, MUSA uses binary channel coding, although the binary channel coding is very close to the Shannon limit, but this is achieved under the condition that the channel coding length is very long. Generally, the Internet of Things code is several hundred bits, and the binary channel coding is limited by the binary domain. At this time, the binary channel coding performance is limited.

Figure 2 is a block diagram of IDMA. Each user in IDMA uses a different interleaver. The interleaver is used to distinguish users. User data is encoded in binary sequence and repeated multiple times. Then different users use different interleaver pairs. The bit sequence is interleaved with the repeated sequence, and the interleaved data is modulated into a multiple access channel. Here, repetition can be regarded as a kind of spread spectrum, that is, spreading is performed using a sequence of all ones. According to the existing literature data, IDMA supports a large number of users, and the maximum number of users can be up to 64. It is an excellent non-orthogonal multiple access method. IDMA uses an interleaver to distinguish users. Since the length of the interleaver is long, it is easy to design a large number of interleavers. After the different user data passes through these interleavers, the interference is randomized and the useful signal is extracted.

IDMA uses an interleaver to distinguish users. It is subject to the differentiated user method. Although IDMA can reuse multiple users on the same resource block, the number of users is still not enough. Or a large number of users, but due to the use of repetitive coding, can not achieve additional performance gains, limiting the better performance of IDMA.

Application content

The present application uses the latest channel coding technology, which combines the advantages of other non-orthogonal multiple access methods, and provides a method, device, communication system and computer storage medium for multiple access.

In order to achieve the above application purpose, the technical solution adopted by the present application is as follows:

A method of multiple access, comprising:

Performing binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain coded data;

Performing binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data;

The binary domain or multi-domain spread spectrum data is mapped to a modulated signal.

In an embodiment, the number of the user data streams is a single, and correspondingly,

Performing binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain coded data, including:

Performing binary domain or multi-domain channel coding on a single user data stream to obtain multiple binary domain or multi-domain coded data;

The method further includes:

A modulated signal of a single user data stream is transmitted.

In an embodiment, the number of the user data streams is multiple, and correspondingly,

Performing binary domain or multi-domain channel coding for each user data stream to obtain multiple binary domain or multi-domain coded data;

The method further includes:

The modulated signal for each user data stream is constelled and power scaled and then superimposed and transmitted.

In an embodiment, performing binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data includes:

The multi-domain coded data is subjected to multi-domain spreading using a binary domain or a multi-domain spreading sequence, and the binary domain or multi-domain spreading sequence used by the different data streams is different.

In an embodiment, the binary domain or multi-domain spreading sequence used by different data streams is the smallest cross-correlation or the binary or multi-domain spreading sequence has the least data at the same location.

In an embodiment, the binary domain or the multi-domain in which the binary domain or multi-domain spreading sequence is located and the dual domain or multi-domain in which the binary domain or multi-domain channel coding is located are in the same binary A domain or a multi-domain, or a sub-domain in a binary or multi-domain.

In an embodiment, before mapping the dual domain or multi-domain spread spectrum data to a modulated signal, the method further includes:

A binary domain or multi-domain scrambling code scrambling is performed on each of the binary domain or multi-domain spread spectrum data.

In an embodiment, performing binary domain or multi-domain scrambling scrambling on each of the binary domain or multi-domain spread spectrum data includes:

The binary domain or multi-domain spread spectrum data is scrambled by a binary domain or a multi-domain scrambling code using a binary domain or a multi-domain scrambling code sequence, and the binary domain or multi-domain scrambling sequence used by different data streams is different.

In an embodiment, the binary domain or multi-domain scrambling code sequence used by different data streams is the smallest cross-correlation or the binary or multi-domain scrambling code sequence has the least data at the same location.

In an embodiment, the binary domain or the multi-domain in which the binary domain or multi-domain scrambling code is located and the dual domain or multi-domain in which the binary domain or multi-domain channel coding is located are in the same dual domain or A multi-domain, or a sub-domain in a binary or multi-domain.

Each of the binary domain or multi-domain spread spectrum data is interleaved.

In an embodiment, after mapping the dual domain or multi-domain spread spectrum data to a modulated signal, the method further includes:

The modulated signals are interleaved.

In an embodiment, interleaving each of the binary domain or multi-domain spread spectrum data comprises:

The binary domain or multi-domain spread spectrum data is interleaved using an interleaving sequence, and the interleaving sequences used by different data streams are different.

In an embodiment, interleaving the modulated signal comprises:

The modulated signals are interleaved using an interleaving sequence that differs in the interleaving sequence used by the different data streams.

In an embodiment, the data is interleaved by different interleaving sequences and the same number at the same position According to at least.

To solve the above technical problem, the present application further provides a device for multiple access, including:

An encoder configured to perform binary domain or multi-domain channel coding on the data stream to obtain multiple binary domain or multi-domain coded data;

a spreader configured to perform binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data;

A modulator configured to map the binary domain or multi-domain spread spectrum data to a modulated signal.

In an embodiment, the number of the user data streams is a single.

The encoder is specifically configured to perform binary domain or multi-domain channel coding on a single user data stream to obtain multiple binary domain or multi-domain coded data;

The modulator is also configured to transmit a modulated signal of a single user data stream.

In an embodiment, the number of the user data streams is multiple.

The encoder is specifically configured to perform binary domain or multi-domain channel coding for each user data stream to obtain multiple binary domain or multi-domain coded data;

The apparatus also includes a constellation rotation and a power scaler configured to perform a constellation rotation and a power scaling of the modulated signals for each user data stream and superimposed and transmitted.

In an embodiment, the spreading, performing binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data includes:

In an embodiment, the device further includes:

And a scrambler configured to perform dual domain or multi-domain scrambling scrambling on each of the binary domain or multi-domain spread spectrum data.

In an embodiment, the scrambler performs binary domain or multi-domain scrambling scrambling on each of the binary domain or multi-domain spread spectrum data, including:

Performing the binary domain or multi-domain spread spectrum data using a binary domain or a multi-domain scrambling sequence The meta domain or multi-domain scrambling code is scrambled, and the binary domain or multi-domain scrambling sequence used by different data streams is different.

In an embodiment, the device further includes:

A first interleaver configured to interleave each of the binary domain or multi-domain spread spectrum data.

In an embodiment, the device further includes:

A second interleaver configured to interleave the modulated signal.

In an embodiment, the interleaving of each of the binary domain or multi-domain spread spectrum data by the first interleaver includes:

In an embodiment, the interleaving the modulation signal by the second interleaver includes:

To solve the above technical problem, the present application further provides a multiple access access communication system, including: a multiple access device, a transmitting end, and a receiving end;

The multiple access device receives the data stream from the transmitting end, and performs binary domain or multi-domain channel coding on the data stream to obtain multiple binary domain or multi-domain encoded data;

Mapping the binary domain or multi-domain spread spectrum data into a modulated signal;

If the number of user data streams is a single, the modulated signal of the single data stream is sent to the receiving end;

If the number of user data streams is multiple, the modulated signals for each data stream are constelled and power-scaled and then superimposed and sent to the receiving end.

In order to solve the above technical problem, the present application further provides a computer storage medium storing a computer program configured to perform the above method of multiple access.

Compared with the prior art, the present application has the following beneficial effects:

The method and apparatus for multiple access of the present application does not use repeated spreading, but uses dual domain/multiple domain sequence spreading, channel coding uses binary domain/multivariate domain channel coding, and the advantage of using multi-domain channel coding is Better performance than binary domain channel coding can be achieved. In addition, the binary domain/multivariate domain spreading sequence is used, and when the multi-domain spreading is combined with the multi-domain channel coding, additional diversity modulation gain can be obtained, thereby greatly improving the overall performance of the non-orthogonal multiple access. The method and apparatus for multiple access in the present application uses a binary domain/multiple spreading sequence and/or a binary domain/multiple scrambling code and/or interleaving as a multi-user differentiation method. This can greatly expand the dimension of the user multiple access, reduce the collision probability generated by the user using the same spreading sequence and/or scrambling code and/or interleaving, and improve the performance of multi-user detection. The method for multiple access in the present application uses multiple independent data streams to transmit, which can effectively improve the efficiency of single-user spectrum.

DRAWINGS

1 is a schematic block diagram of a related art MUSA method;

2 is a schematic block diagram of a related art IDMA method;

3 is a flowchart of a method for multiple access in an embodiment of the present application;

4 is a schematic block diagram of a method for multiple access in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a device for multiple access according to an embodiment of the present application; FIG.

6 is a schematic block diagram of a process of multiple access according to Embodiment 1 of the present application;

7 is a schematic block diagram of a process of multiple access according to Embodiment 2 of the present application;

8 is a schematic block diagram of a process of multiple access according to Embodiment 3 of the present application;

9 is a schematic block diagram of a process of multiple access according to Embodiment 4 of the present application.

detailed description

In order to make the application, technical solutions and beneficial effects of the present application more clear, the embodiments of the present application will be described below with reference to the accompanying drawings, and it should be noted that, in the case of no conflict, The features in the embodiments and examples in the present application may be arbitrarily combined with each other.

As shown in FIG. 3 and FIG. 4, the embodiment of the present application provides a method for multiple access, including:

S101. Perform binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain coded data.

S102. Perform binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain multiple dual-domain or multi-domain spread spectrum data.

S103. Mapping the dual domain or multi-domain spread spectrum data into a modulated signal.

S104. If the number of the user data streams is a single, send a modulated signal of the single data stream.

S105. If the number of the user data streams is multiple, the modulated signals for each user data stream are constellation rotated and power scaled and then superimposed and transmitted.

In the above solution, step S104 and step S105 do not limit the execution order.

The method provided by the embodiment of the present application uses multi-domain channel coding. Generally, the multi-domain channel coding performs better than the binary domain channel coding when the code length is short. Therefore, the coding gain can be obtained by using the multi-domain channel coding. The method provided by the embodiment of the present application, after using the multi-domain channel coding, combined with the multi-domain spreading or spreading sequence, can obtain the modulation diversity gain, and the performance boundary that can be achieved is better than the binary domain channel coding. Obtain the performance that cannot be achieved by binary domain channel coding. Although the use of multi-domain channel coding and decoding complexity is also improved. To achieve a compromise between complexity and performance, binary domain channel coding can be used, and other parts use multi-domain signals, such as multi-domain spreading, multi-domain scrambling, to reduce interference between users.

The performing multi-domain spreading on each of the multi-domain encoded data in step S102 includes:

The multi-domain coded data is subjected to binary domain or multi-domain spreading using a binary domain or a multi-domain spreading sequence, and the binary domain or multi-domain spreading sequence used by different data streams is different.

Wherein, the binary domain or multi-domain spreading sequence used by different data streams is the smallest cross-correlation or the dual-domain or multi-domain spreading sequence has the fewest elements at the same position.

The dual domain or multi-domain spreading sequence design principle in the embodiment of the present application is that the cross-correlation is the smallest or The spreading sequence has the fewest elements at the same location.

Based on the foregoing embodiment, the binary domain or the multi-domain in which the binary domain or multi-domain spreading sequence is located and the dual domain or multi-domain in which the binary domain or multi-domain channel coding is located are in the same dual domain or A multi-domain, or a sub-domain in a binary or multi-domain.

Step S103, before mapping the multi-domain spread spectrum data to the modulated signal, further includes:

A binary domain or multi-domain scrambling code scrambling is performed on each of the multi-domain spread spectrum data.

Specifically, performing binary domain or multi-domain scrambling scrambling on each of the dual domain or multi-domain spread spectrum data includes:

The binary domain or multi-domain spread spectrum data is subjected to binary domain or multi-domain scrambling using a binary domain or multi-domain scrambling sequence, and the binary domain or multi-domain scrambling sequence used by different data streams is different.

The binary domain or multi-domain scrambling code sequence used by different users is the smallest cross-correlation or the two elements of the binary domain or multi-domain scrambling code sequence are the same at the same position.

The binary domain or the multi-domain in which the binary domain or multi-domain scrambling code is located and the dual domain or multi-domain in which the binary domain or multi-domain channel coding is located are in the same dual domain or multi-domain, or in the second A subdomain of a metadomain or a multivariate domain.

The binary domain or multi-domain scrambling code design principle is that the cross-correlation is the smallest or all scrambling codes are the same at the same position.

Step S103, before mapping the dual domain or multi-domain spread spectrum data into a modulated signal, further includes:

Each of the binary domain or multi-domain spread spectrum data is interleaved.

Step S103, after mapping the dual domain or multi-domain spread spectrum data into a modulated signal, further includes:

The modulated signals are interleaved.

In the embodiment of the present application, the interleaving may be performed at any stage after the spreading, before or after the modulation, when there is a step of scrambling, before the scrambling or after the scrambling.

Interleaving each of the binary domain or multi-domain spread spectrum data includes:

The binary domain or multi-domain spread spectrum data is interleaved using an interleaving sequence, and different user data uses different interleaving sequences.

Interleaving the modulated signal includes:

The modulated signals are interleaved using an interleaving sequence, with different user data using different interleaving sequences.

After the data is interleaved by different interleaving sequences, the same elements in the same position are the least.

The principle of interleaving sequence design is that the sequences of the same sequence interleaved by different interleavers have the same number of elements at the same position.

After adding the scrambling code and/or interleaving, the method provided by the embodiment of the present application can not only use the dual domain or the multi-domain spreading sequence to perform multiple access, but also can perform multi-domain or multi-domain scrambling and/or interleaving. Address or any combination of the two to do multiple access. Multi-addressing using binary domain or multi-domain scrambling and/or interleaving can greatly increase the number of multi-users. When the interleaving is performed for multiple access, the multi-domain spreading sequence, the scrambling sequence, and the interleaving sequence in the embodiment of the present application can be used to distinguish users. If the two users have the same interleaving sequence, the user signals that are prone to interlace collisions cannot be used. The case of demodulation. At this time, the multi-domain spreading sequence can be used to distinguish users; when the multi-domain spreading sequence collides, the interleaving sequence can be used to distinguish users. This reduces the probability of a user's random collision. Add multi-domain scrambling code to do multiple access, which increases the dimension of multiple access, which can reduce the probability of random collision of users.

As shown in FIG. 5, the embodiment of the present application further provides an apparatus for multiple access, including:

The encoder 51 is configured to perform binary domain or multi-domain channel coding for the user data stream to obtain multiple binary domain or multi-domain coded data;

The frequency converter 52 is configured to perform binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data;

a modulator 53, mapping the binary domain or multi-domain spread spectrum data into a modulated signal;

In an embodiment, the number of the user data streams is a single.

The encoder 51 is specifically configured to perform binary domain or multi-domain channel coding on a single user data stream to obtain multiple binary domain or multi-domain encoded data.

The modulator 53, is also configured to transmit a modulated signal of a single data stream.

In another embodiment, the number of the user data streams is multiple.

The encoder 51 is specifically configured to perform binary domain or multi-domain channel coding on each user data stream to obtain multiple binary domain or multi-domain coded data.

The apparatus also includes a constellation rotation and power scaler 54 configured to perform a constellation rotation and a power scaling of the modulated signals for each user data stream and superimposed and transmitted.

The performing, by the spreader, performing binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data includes:

In an embodiment, the device further includes:

The scrambler performs binary domain or multi-domain scrambling scrambling on each of the binary domain or multi-domain spread spectrum data, including:

In an embodiment, the device further includes:

A second interleaver configured to interleave the modulated signal.

Specifically, the first interleaver interleaving each of the binary domain or multi-domain spread spectrum data includes:

Specifically, the interleaving the modulation signal by the second interleaver includes:

The embodiment of the present application further provides a multiple access access communication system, including: a multiple access device, a transmitting end, and a receiving end;

The apparatus for multiple access access receives a user data stream from a transmitting end, and performs binary domain or multi-domain channel coding on the user data stream to obtain a plurality of binary domain or multi-domain encoded data;

If the number of user data streams is single, transmitting the modulated signal of the single user data stream to the receiving end;

If the number of user data streams is multiple, the modulated signals for each user data stream are subjected to constellation rotation and power scaling and then superimposed and transmitted to the receiving end.

The multiple access access communication system in the embodiment of the present application may be applied to uplink communication or downlink communication, where when the multiple access communication system is applied to uplink communication, the transmitting end is a terminal, and the receiving end is For the base station, when the multiple access communication system is applied to downlink communication, the transmitting end is a base station, and the receiving end is a terminal.

The embodiment of the present application further provides an apparatus for multiple access, including one or more (only one shown) processors (the processor may include but not limited to a Micro Controller Unit (MCU) or may A processing device such as a Programmable Gate Array (FPGA), a memory for storing data, and a transmission device for a communication function. One of ordinary skill in the art will appreciate that the terminal may also include more or fewer components.

The memory can be used to store software programs and modules of the application software, such as program instructions/modules corresponding to the method in the embodiment of the present invention, and the processor executes various functional applications and data processing by running software programs and modules stored in the memory. That is, the above method is implemented. The memory may include a high speed random access memory, and may also include a nonvolatile memory such as one or more Magnetic storage, flash memory, or other non-volatile solid state memory. In some examples, the memory can further include memory remotely located relative to the processor, which can be connected to the terminal over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device is for receiving or transmitting data via a network. The above specific network example may include a wireless network provided by a communication provider of the terminal. In one example, the transmission device includes a Network Interface Controller (NIC) that can be connected to other network devices through the base station to communicate with the Internet. In one example, the transmission device can be a radio frequency (RF) module for communicating with the Internet wirelessly.

Example 1

6 is a schematic block diagram of a process for performing multiple access according to a method for multiple access according to an embodiment of the present application. As shown in (a), user data is coded through a binary domain or a multi-domain channel, and then binary Domain or multi-domain spreading. The spreading sequence of each user is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation sequence of the spreading sequence is the smallest or the number of elements of the two-two sequence differing at the same position is the least. The multi-domain coding may be performed on a multi-domain (which may be a Galois field in this embodiment), such as GF (16), and the multi-domain spreading sequence also needs to be generated in the same domain or its sub-domains, such as GF (16). ) or GF (4) or GF (2). Modulation can use QPSK, 16QAM or other constellations. When multi-domain channel coding and multi-domain spreading are both on GF(16), when QPSK modulation is used, each element on the spread GF(16) is mapped to two QPSK symbols. When multi-domain channel coding and multi-domain spreading are both on GF(16), when 16QAM modulation is used, each element on the spread GF(16) is mapped to a 16QAM symbol. As shown in (b), the difference between (b) and (a) is that processing is performed for a plurality of data streams, and constellation rotation and power scaling processing are required for the modulated signals corresponding to the plurality of data.

Example 2

7 is a schematic block diagram of a process for performing multiple access according to a method for multiple access according to an embodiment of the present application, and as shown in (a), a case of a user single stream, that is, a number of user data streams is described. For a single, a total of dk users of a single data stream, the data stream through the binary domain or multi-domain channel coding, after the binary domain or multi-domain spread spectrum, using the binary domain or multi-domain scrambling code for scrambling. Different user scrambling codes can be the same or different. The spreading sequence of each user is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation sequence of the spreading sequence is the smallest or the number of elements of the two-two sequence differing at the same position is the least. When different user scrambling codes are different, the scrambling code design principle may be the same as or different from the spreading sequence. User differentiation can be through multiple spreading sequences, and/or multi-domain scrambling. Multi-domain channel coding can be performed on the Galois field. For example, GF(16), multi-domain spreading sequences and multi-domain scrambling codes also need to be generated in the same domain or its sub-domains, such as GF(16) or GF(4). ) or GF(2). Modulation can use QPSK, 16QAM or other constellations. When multi-domain channel coding and multi-domain spreading sequences are used, the non-binary domain scrambling codes are all on GF(16). When QPSK modulation is used, the elements on each scrambled GF(16) are mapped into two QPSK symbols. When multi-domain channel coding and multi-domain spreading, the multi-domain scrambling code is on GF(16). When 16QAM modulation is used, each scrambled element on GF(16) is mapped to a 16QAM symbol. The positions of the spreading sequence and the scrambling code in this block diagram can be interchanged. As shown in (b), the difference between (b) and (a) is that the user is described as multi-stream, that is, the number of one user data stream is multiple, and one user has a total of dM data streams. In this case, constellation rotation and power scaling processing are required for the modulated signals of the plurality of data streams. It is worth noting that Figure (b) only illustrates the case of a user's multi-stream, multiple users are the same as a user.

Example 3

8 is a schematic block diagram of a process for performing multiple access in a method for multiple access according to an embodiment of the present application. As shown in (a), a case of a single stream of a user, that is, a number of user data streams is described. For a single, there are a total of dk users of a single data stream, the data stream is encoded by a binary domain or a multi-domain channel, and after spreading in a binary domain or a multi-domain, the interleaved signal is interleaved using an interleaver. Do not It can be the same or different from the user interleaver. The spreading sequence of each user is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation sequence has the smallest cross-correlation or the two-two sequence has the fewest number of elements at the same position. When different users use different interleavers, the interleaver design principle is that the signals after the same signal are interlaced and the signals overlap at the same position. User differentiation can be through multi-domain spreading sequences, and/or interleavers. The channel coding can be performed on a binary domain or a multi-domain (which may be a Galois field in this embodiment). If channel coding is performed on the multivariate domain, such as GF(16), the multi-domain spreading sequence is to be generated on the same domain or its subfields, such as GF(16) or GF(4) or GF(2). Modulation can use QPSK, 16QAM or other constellations. When the multi-domain channel coding and the multi-domain spreading sequence are both on GF(16), when QPSK modulation is used, the elements on GF(16) after each spread-interleaving are mapped into two QPSK symbols. When multi-domain channel coding and multi-domain spreading are both on GF(16), when 16QAM modulation is used, the elements on GF(16) after each spread-interleaving are mapped to one 16QAM symbol. The position of the spreading sequence and the interleaver in this block diagram can be interchanged. As shown in (b), the difference between (b) and (a) is that the user is described as multi-stream, that is, the number of one user data stream is multiple, and one user has a total of dM data streams. In this case, constellation rotation and power scaling processing are required for the modulated signals of the plurality of data streams. It is worth noting that Figure (b) only illustrates the case of a user's multi-stream, multiple users are the same as a user.

Example 4

9 is a schematic block diagram of a process for performing multiple access according to a method for multiple access according to an embodiment of the present application. As shown in FIG. (a), a case of a single stream of a user, that is, a number of user data streams is described. For a single, a total of dk users of a single data stream, the data stream is subjected to binary domain or multi-domain channel coding, after the binary domain or multi-domain spread spectrum, the binary domain or multi-domain scrambling code is used for scrambling, each The user scrambling codes may be the same or different, and the scrambled signals are interleaved using an interleaver. Different user interleavers may be the same or different. The spreading sequence of each user is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation sequence has the smallest cross-correlation or/and the two-two sequences are in the same position. Set the number of different elements to a minimum. When different users use different scrambling codes, the scrambling code design principle is to minimize the elements with the same scrambling code at the same position. The interleaver design principle is that the signals after the interleaving have the least overlap at the same position. User differentiation may be through multi-domain spreading sequences, and/or multi-domain scrambling, and/or interleavers. The multi-domain channel coding may be performed on the multi-domain (which may be a Galois field in this embodiment), such as GF (16), the multi-domain spreading sequence and the multi-domain scrambling code are to be generated in the same domain or its sub-domains, Such as GF (16) or GF (4) or GF (2). Modulation can use QPSK, 16QAM or other constellations. When the multi-domain channel coding, the multi-domain spreading sequence, and the multi-domain scrambling code are all on GF(16), when QPSK modulation is used, the elements on GF(16) after each scrambled interleaving are mapped into two QPSK symbols. When multi-domain channel coding, multi-domain spreading sequence and multi-domain scrambling code are all on GF(16), when 16QAM modulation is used, the elements on GF(16) after each scrambled interleaving are mapped to one 16QAM symbol. In this block diagram, the spread spectrum sequence, scrambling code, and interleaver positions can be interchanged. As shown in (b), the difference between (b) and (a) is that the user is described as multi-stream, that is, the number of one user data stream is multiple, and one user has a total of dM data streams. In this case, constellation rotation and power scaling processing are required for the modulated signals of the plurality of data streams. It is worth noting that Figure (b) only illustrates the case of a user's multi-stream, multiple users are the same as a user.

Embodiments of the invention may also be stored in a computer readable storage medium if implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, an embodiment of the present invention further provides a computer storage medium in which a calculation is stored. The computer program is configured to perform the method of multiple access of an embodiment of the present invention.

The embodiments disclosed in the present application are as described above, but the contents thereof are only for the purpose of facilitating understanding of the technical solutions of the present application, and are not intended to limit the present application. Any modification or variation in the form and details of the implementation may be made by those skilled in the art without departing from the scope of the present invention. It is subject to the scope defined by the appended claims.

Industrial applicability

The technical solution of the embodiment of the present application does not use repeated spreading, but uses dual domain/multiple domain sequence spreading, and channel coding uses binary domain/multivariate domain channel coding. The advantage of using multi-domain channel coding is that the ratio can be obtained. The binary domain channel coding has better performance. In addition, the binary domain/multivariate domain spreading sequence is used, and when the multi-domain spreading is combined with the multi-domain channel coding, additional diversity modulation gain can be obtained, thereby greatly improving the overall performance of the non-orthogonal multiple access. The method and apparatus for multiple access in the present application uses a binary domain/multiple spreading sequence and/or a binary domain/multiple scrambling code and/or interleaving as a multi-user differentiation method. This can greatly expand the dimension of the user multiple access, reduce the collision probability generated by the user using the same spreading sequence and/or scrambling code and/or interleaving, and improve the performance of multi-user detection.

Claims

A method of multiple access, comprising:

Performing binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain coded data;

Performing binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data;

The binary domain or multi-domain spread spectrum data is mapped to a modulated signal.
The method of claim 1 wherein: the number of said user data streams is a single, correspondingly

Performing binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain coded data, including:

Performing binary domain or multi-domain channel coding on a single user data stream to obtain multiple binary domain or multi-domain coded data;

The method further includes:

A modulated signal of a single user data stream is transmitted.
The method of claim 1 wherein: the number of said user data streams is plural, and accordingly,

Performing binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain coded data, including:

Performing binary domain or multi-domain channel coding for each user data stream to obtain multiple binary domain or multi-domain coded data;

The method further includes:

The modulated signal for each user data stream is constelled and power scaled and then superimposed and transmitted.
The method of claim 1 wherein: said each of said binary domain or multivariate domain The binary data or the multi-domain spreading of the code data includes:

The multi-domain coded data is subjected to multi-domain spreading using a binary domain or a multi-domain spreading sequence, and the binary domain or multi-domain spreading sequence used by the different data streams is different.
The method of claim 4, wherein said binary domain or multi-domain spreading sequence used by different data streams is minimized cross-correlation or said binary domain or multi-domain spreading sequence has the same minimum data at the same location .
The method of claim 5, wherein the binary domain or multivariate domain in which the binary domain or multivariate domain spreading sequence is located and the binary domain or multivariate domain in which the binary domain or multivariate domain channel coding is located are The same binary domain or multivariate domain, or in a subdomain of a binary domain or a multivariate domain.
The method of claim 1 wherein mapping the binary domain or multi-domain spread spectrum data to a modulated signal further comprises:

A binary domain or multi-domain scrambling code scrambling is performed on each of the binary domain or multi-domain spread spectrum data.
The method of claim 7 wherein performing binary domain or multi-domain scrambling scrambling on each of said binary domain or multi-domain spread spectrum data comprises:

The binary domain or multi-domain spread spectrum data is scrambled by a binary domain or a multi-domain scrambling code using a binary domain or a multi-domain scrambling code sequence, and the binary domain or multi-domain scrambling sequence used by different data streams is different.
The method of claim 8 wherein said binary domain or multi-domain scrambling code sequence used by different data streams is minimal cross-correlation or said binary domain or multi-domain scrambling code sequence is identical in data at the same location. .
The method of claim 9, wherein the binary domain or multivariate domain in which the binary domain or multivariate domain scrambling code is located is in the same binary domain or multivariate domain in which the binary domain or multivariate domain channel coding is located A binary domain or a multivariate domain, or a subdomain of a binary domain or a multivariate domain.
The method according to claim 1 or 7, wherein before mapping the binary domain or multi-domain spread spectrum data to a modulated signal, the method further comprises:

Each of the binary domain or multi-domain spread spectrum data is interleaved.
The method of claim 1 or 7, wherein mapping the binary domain or multi-domain spread spectrum data to a modulated signal further comprises:

The modulated signals are interleaved.
The method of claim 11 wherein interleaving each of said binary domain or multivariate domain spread spectrum data comprises:

The binary domain or multi-domain spread spectrum data is interleaved using an interleaving sequence, and the interleaving sequences used by different data streams are different.
The method of claim 12 wherein interleaving the modulated signal comprises:

The modulated signals are interleaved using an interleaving sequence that differs in the interleaving sequence used by the different data streams.
The method of claim 13 or 14, wherein the data is interleaved with different interleaved sequences and the same data at the same location is minimized.
A device for multiple access, comprising:

An encoder configured to perform binary domain or multi-domain channel coding on the user data stream to obtain multiple binary domain or multi-domain encoded data;

a spreader configured to perform binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data;

A modulator configured to map the binary domain or multi-domain spread spectrum data to a modulated signal.
The apparatus of claim 16 wherein: said number of said user data streams is a single,

The encoder is specifically configured to perform binary domain or multi-domain channel coding on a single user data stream to obtain multiple binary domain or multi-domain coded data;

The modulator is also configured to transmit a modulated signal of a single user data stream.
The apparatus of claim 16 wherein: said number of said user data streams is Multiple,

The encoder is specifically configured to perform binary domain or multi-domain channel coding for each user data stream to obtain multiple binary domain or multi-domain coded data;

The apparatus also includes a constellation rotation and a power scaler configured to perform a constellation rotation and a power scaling of the modulated signals for each user data stream and superimposed and transmitted.
The apparatus of claim 16 wherein: said spreading unit performing binary domain or multi-domain spreading for each of said binary domain or multi-domain encoded data comprises:

The multi-domain coded data is subjected to multi-domain spreading using a binary domain or a multi-domain spreading sequence, and the binary domain or multi-domain spreading sequence used by the different data streams is different.
The apparatus of claim 16 further comprising:

And a scrambler configured to perform dual domain or multi-domain scrambling scrambling on each of the binary domain or multi-domain spread spectrum data.
The apparatus of claim 20, wherein said scrambler performs binary domain or multi-domain scrambling scrambling on each of said binary domain or multi-domain spread spectrum data comprises:

The binary domain or multi-domain spread spectrum data is scrambled by a binary domain or a multi-domain scrambling code using a binary domain or a multi-domain scrambling code sequence, and the binary domain or multi-domain scrambling sequence used by different data streams is different.
The device according to claim 16 or 21, further comprising:

A first interleaver configured to interleave each of the binary domain or multi-domain spread spectrum data.
The device according to claim 16 or 21, further comprising:

A second interleaver configured to interleave the modulated signal.
The apparatus of claim 23, wherein the interleaving of each of the binary domain or multi-domain spread spectrum data by the first interleaver comprises:

The binary domain or multi-domain spread spectrum data is interleaved using an interleaving sequence, and the interleaving sequences used by different data streams are different.
The apparatus of claim 23 wherein said second interleaver pairs said modulation Signal interleaving includes:

The modulated signals are interleaved using an interleaving sequence that differs in the interleaving sequence used by the different data streams.
A multiple access communication system includes: a multiple access device, a transmitting end, and a receiving end;

The apparatus for multiple access access receives a user data stream from a transmitting end, and performs binary domain or multi-domain channel coding on the user data stream to obtain a plurality of binary domain or multi-domain encoded data;

Performing binary domain or multi-domain spreading on each of the binary domain or multi-domain encoded data to obtain a plurality of binary domain or multi-domain spread spectrum data;

Mapping the binary domain or multi-domain spread spectrum data into a modulated signal;

If the number of user data streams is a single, the modulated signal of the single data stream is sent to the receiving end;

If the number of user data streams is multiple, the modulated signals for each data stream are constelled and power-scaled and then superimposed and sent to the receiving end.
A computer storage medium having stored therein computer executable instructions configured to perform the method of multiple access according to any of claims 1-15.