CN111092835B

CN111092835B - Sequence demodulation method, device, communication equipment and storage medium

Info

Publication number: CN111092835B
Application number: CN201911379736.3A
Authority: CN
Inventors: 周孔松
Original assignee: Ruijie Networks Co Ltd
Current assignee: Ruijie Networks Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2022-09-20
Anticipated expiration: 2039-12-27
Also published as: CN111092835A

Abstract

The embodiment of the application provides a sequence demodulation method, a sequence demodulation device, communication equipment and a storage medium, belongs to the technical field of communication, and is used for realizing high-reliability demodulation of sequences and improving effectiveness of sequence demodulation. The method comprises the following steps: receiving a first sequence; respectively normalizing the cross-correlation results obtained by cross-correlating the first sequence with each candidate sequence in the N candidate sequences to obtain N corresponding normalized results, wherein N is a positive integer; determining whether a maximum normalization value of the N normalization results is greater than a threshold; and when the maximum normalization value is larger than the threshold value, determining the information included by the first sequence according to the candidate sequence corresponding to the maximum normalization value.

Description

Sequence demodulation method, device, communication equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a sequence demodulation method and apparatus, a communication device, and a storage medium.

Background

Nowadays, the requirements of people on mobile terminals such as mobile phones, tablet computers and smart bracelets are increasingly deepened, the types and the number of the mobile terminals are increased, the fourth generation mobile communication system (4G) cannot meet the requirements of people on future communication, and the fifth generation mobile communication system (5G) gradually enters our lives. As a unified network and system, the 5G aims to meet the requirements and scenarios of multiple dimensions, including enhanced Mobile Broadband (eMBB) for large-traffic Mobile bandwidth services, Ultra-high Reliable Ultra-Low Latency Communications (URLLC), and large-connection internet of things (mtc) for large-scale internet of things services.

A Physical Uplink Control Channel (PUCCH) is mainly used to transfer Uplink Control Information (UCI), and is a basic component constituting a Physical layer of a 5G system. Taking the PUCCH as an example, compared with the PUCCH in the 4G Long Term Evolution (LTE) system, the 5G PUCCH is more flexible in type and structure to be suitable for various different scenarios. The 5G PUCCH formats include five formats of 0 to 4, where PUCCH format 0 (hereinafter abbreviated as PUCCH 0) may be used to carry 1bit (bit) or 2bit Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement (ACK)/Negative Acknowledgement (NACK) information and Scheduling ReQuest (SR) reQuest information, occupies 1 to 2 symbols in a time domain, occupies 1 Physical Resource Block (PRB) in a frequency domain, and supports multiplexing of 12 terminals on the same time-frequency Resource.

To ensure the normal operation of a communication system (e.g., LTE system), it is necessary to demodulate the sequences transmitted by various channels (e.g., PUCCH mentioned above) with high reliability, so how to effectively demodulate the sequences transmitted by various channels is a problem to be considered.

Disclosure of Invention

The embodiment of the application provides a sequence demodulation method, a sequence demodulation device, communication equipment and a storage medium, which are used for realizing high-reliability demodulation of a sequence and improving the effectiveness of sequence demodulation.

In a first aspect, a sequence demodulation method is provided, the method including:

receiving a first sequence;

respectively normalizing the cross-correlation results obtained by cross-correlating the first sequence with each candidate sequence in the N candidate sequences to obtain N corresponding normalized results, wherein N is a positive integer;

determining whether a maximum normalization value of the N normalization results is greater than a threshold;

and when the maximum normalization value is larger than the threshold value, determining the information included by the first sequence according to the candidate sequence corresponding to the maximum normalization value.

Optionally, the performing normalization processing on the cross-correlation result obtained by performing cross-correlation processing on the first sequence and each candidate sequence in the N candidate sequences respectively to obtain N normalization results includes:

the N normalization results are calculated according to the following formula:

wherein R (k, l, a) represents the first sequence, P _i (k, l) denotes the i-th candidate sequence, fRatio, of the N candidate sequences _i Expressing the ith normalization value in the N normalization results, wherein i is an integer from 1 to N; k represents an index of a subcarrier used for carrying the first sequence, and K represents that a Physical Resource Block (PRB) occupied by the first sequence comprisesL denotes a symbol index, a denotes an index of an antenna receiving the first sequence, L denotes a total number of occupied symbols, and a denotes a number of antennas receiving the first sequence.

Optionally, before determining whether a maximum normalized value of the N normalized results is greater than a threshold, the method further includes:

and determining the threshold according to the number of symbols occupied by the first sequence and the number of receiving antennas of the first sequence.

Optionally, before determining the threshold according to the number of symbols occupied by the first sequence and the number of receive antennas of the first sequence, the method further includes:

and configuring the threshold according to a simulation result of performing analog demodulation on a plurality of analog sequences under a preset analog environment to reach a specified demodulation index, wherein each analog sequence in the plurality of analog sequences has the same format as the first sequence, and the preset analog environment comprises a plurality of different combinations of symbol numbers and receiving antenna numbers to bear different analog sequences.

Optionally, before performing normalization processing on cross-correlation results obtained by performing cross-correlation processing on the first sequence and each candidate sequence of the N candidate sequences, the method further includes:

determining M local sequences corresponding to the format of the first sequence, wherein M is an integer greater than or equal to N;

determining the bit number occupied by the first sequence;

and determining the local sequence indicated by the sequence index corresponding to the bit number occupied by the first sequence in the M local sequences as the N candidate sequences according to the corresponding relation between the bit number and the sequence index.

Optionally, determining M local sequences corresponding to the format of the first sequence includes:

determining all types of messages transmitted in the format of the first sequence;

and respectively generating a corresponding message sequence according to the generation mode of each type of message in all types to obtain the M local sequences.

Optionally, determining information included in the first sequence according to the candidate sequence corresponding to the maximum normalization value includes:

determining a message type corresponding to the first sequence according to a pre-scheduled transmission resource;

and demodulating the candidate sequence corresponding to the maximum normalization value to obtain the sequence content corresponding to the message type.

In a second aspect, an apparatus for sequence demodulation is provided, the apparatus comprising:

a receiving module, configured to receive a first sequence;

the normalization module is used for respectively normalizing the cross-correlation results obtained by cross-correlating the first sequence with each candidate sequence in the N candidate sequences to obtain corresponding N normalization results, wherein N is a positive integer;

a judging module, configured to determine whether a maximum normalization value in the N normalization results is greater than a threshold;

and the demodulation module is used for determining the information included by the first sequence according to the candidate sequence corresponding to the maximum normalization value when the maximum normalization value is larger than the threshold value.

Optionally, the normalization module is configured to:

the N normalization results are calculated according to the following formula:

wherein R (k, l, a) represents the first sequence, P _i (k, l) denotes the i-th candidate sequence, fRatio, of the N candidate sequences _i Expressing the ith normalization value in the N normalization results, wherein i is an integer from 1 to N; k represents an index of a subcarrier used for carrying the first sequence, and K represents the number of Resource Elements (REs) included in a Physical Resource Block (PRB) occupied by the first sequenceL denotes a symbol index, a denotes an index of an antenna receiving the first sequence, L denotes a total number of occupied symbols, and a denotes a number of antennas receiving the first sequence.

Optionally, the apparatus further includes a first determining module, configured to determine the threshold according to the number of symbols occupied by the first sequence and the number of receiving antennas of the first sequence before the determining module determines whether a maximum normalization value in the N normalization results is greater than a threshold.

Optionally, the apparatus further includes a configuration module, configured to, before the first determining module determines the threshold according to the number of symbols occupied by the first sequence and the number of receiving antennas of the first sequence, configure the threshold according to a simulation result of performing simulation demodulation on a plurality of simulation sequences in a preset simulation environment so as to achieve a specified demodulation index, where each of the plurality of simulation sequences has a format that is the same as that of the first sequence, and the preset simulation environment includes different simulation sequences that are carried by a plurality of combinations of different numbers of symbols and numbers of receiving antennas.

Optionally, the apparatus further includes a second determining module, configured to determine M local sequences corresponding to the format of the first sequence before the normalizing module performs normalization processing on a cross-correlation result obtained by performing cross-correlation processing on the first sequence and each of N candidate sequences, where M is an integer greater than or equal to N; determining the bit number occupied by the first sequence; and determining the local sequence indicated by the sequence index corresponding to the bit number occupied by the first sequence in the M local sequences as the N candidate sequences according to the corresponding relation between the bit number and the sequence index.

Optionally, the second determining module is configured to:

determining all types of messages transmitted in the format of the first sequence; and respectively generating a corresponding message sequence according to the generation mode of each type of message in all types to obtain the M local sequences.

Optionally, the demodulation module is configured to determine, according to a pre-scheduled transmission resource, a message type corresponding to the first sequence; and demodulating the candidate sequence corresponding to the maximum normalization value to obtain the sequence content corresponding to the message type.

In a third aspect, a communication device is provided, the communication device comprising:

a memory for storing program instructions;

a processor for calling the program instructions stored in said memory and for executing the steps comprised in any of the methods of the first aspect in accordance with the obtained program instructions.

In a fourth aspect, there is provided a storage medium having stored thereon computer-executable instructions for causing a computer to perform the steps included in the method of any one of the first aspect.

In a fifth aspect, a computer program product containing instructions is provided, which when run on a computer causes the computer to perform the steps of the sequence demodulation method described in the various possible implementations described above.

In the embodiment of the present application, for a series (for example, a first sequence) that needs to be demodulated, a cross-correlation result obtained by performing cross-correlation on the first sequence and each candidate sequence in N candidate sequences is normalized to obtain N normalization results correspondingly, and then a maximum normalization value in the N normalization results is directly compared with a threshold, and when the maximum normalization value is greater than the threshold, information included in the first sequence is determined according to the candidate sequence corresponding to the maximum normalization value, that is, demodulation of the first sequence is implemented. In the method, the first sequence and each candidate sequence are subjected to cross-correlation calculation to obtain a result, then normalization processing is carried out, and demodulation of the sequences is realized according to comparison between the maximum normalization value and the corresponding threshold value, so that an effective demodulation mode aiming at the sequences is provided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of an application scenario in an embodiment of the present application;

fig. 2 is a flowchart of a sequence demodulation method provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a threshold corresponding to 1T2R and 1 symbol in the determination provided in the embodiment of the present application;

fig. 4 is a schematic diagram of a threshold corresponding to the determination of 1T2R and 2 symbols according to an embodiment of the present application;

FIG. 5 is a diagram illustrating simulation results provided in an embodiment of the present application;

FIG. 6 is another diagram illustrating simulation results provided by an embodiment of the present application;

FIG. 7 is another diagram illustrating simulation results provided by an embodiment of the present application;

FIG. 8 is another diagram illustrating simulation results provided by an embodiment of the present application;

FIG. 9 is another diagram illustrating simulation results provided by an embodiment of the present application;

FIG. 10 is another diagram illustrating simulation results provided by an embodiment of the present application;

fig. 11a is a block diagram of a sequence demodulation apparatus according to an embodiment of the present application;

fig. 11b is another block diagram of a sequence demodulation apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments and features of the embodiments of the present invention may be arbitrarily combined with each other without conflict. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

The terms "first" and "second" in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the term "comprises" and any variations thereof, which are intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

In the embodiment of the present invention, "a plurality" may mean at least two, for example, two, three, or more, and the embodiment of the present invention is not limited.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document generally indicates that the preceding and following related objects are in an "or" relationship unless otherwise specified.

Before describing the embodiments of the present application, some technical features of the present application will be described to facilitate understanding for those skilled in the art.

1) Terminal equipment, including equipment providing voice and/or data connectivity to a user, may include, for example, handheld devices having wireless connection capability, or processing devices connected to wireless modems. The terminal device may communicate with a core Network via a Radio Access Network (RAN), and exchange voice and/or data with the RAN. The terminal Device may include a User Equipment (UE), a wireless terminal Device, a Mobile terminal Device, a Device-to-Device communication (D2D) terminal Device, a V2X terminal Device, a Machine-to-Machine/Machine-Type communication (Machine-to-Machine/Machine-Type Communications, M2M/MTC) terminal Device, an Internet of Things (IoT) terminal Device, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile Station), a Remote Station (Remote Station), an Access Point (Access Point, AP), a Remote terminal (Remote terminal), an Access terminal (Access terminal), a User terminal (User terminal), a User agent (User agent), or a User Equipment (User Device), and the like. For example, mobile telephones (or so-called "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of the information sensing device include a barcode, a Radio Frequency Identification (RFID), a sensor, a Global Positioning System (GPS), and a laser scanner.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application function, and need to be matched with other equipment such as a smart phone for use, such as various smart bracelets, smart helmets, smart jewelry and the like for physical sign monitoring.

The various terminal devices described above, if located on a vehicle (e.g., placed in or installed in the vehicle), may be considered to be vehicle-mounted terminal devices, which are also referred to as on-board units (OBUs), for example.

2) A network device may refer to a device in an access network that communicates over the air with wireless terminal devices through one or more cells. The Network device may be a node in a Radio Access Network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). Currently, some examples of network devices are: a gNB, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home Base Station (e.g., home evolved Node B or home Node B, HNB), a Base Band Unit (BBU), or an Access Point (Access Point, AP) of Wireless Fidelity (WiFi). In addition, in one network configuration, the network devices may include Centralized Unit (CU) nodes and Distributed Unit (DU) nodes. In the structure, protocol layers of an eNB in a Long Term Evolution (LTE) system are separated, functions of part of the protocol layers are controlled in a CU in a centralized mode, functions of the rest or all of the protocol layers are distributed in a DU, and the DU is controlled in the CU in the centralized mode.

Application scenarios of embodiments of the present application are described below.

Fig. 1 shows a schematic diagram of a possible application scenario according to an embodiment of the present application, where the application scenario includes a network device and a terminal device, where functions of the network device and the terminal device have been described in the foregoing, and are not described herein again. The terminal device is wirelessly connected with the network device, and data transmission can be performed between the terminal device and the network device, for example, data sent by the network device to the terminal device is called downlink transmission, and data sent by the terminal device to the network device is called uplink transmission. The application scenario shown in fig. 1 may be an application scenario in an NR system, or may be an application scenario in an LTE system, for example, if the application scenario shown in fig. 1 is an application scenario in an NR system, then the network device therein may be a gNB in the NR system, and the terminal device therein may be a terminal device in the NR system.

It should be noted that the scenario shown in fig. 1 should not limit the application scenario of the embodiment of the present application, and in an actual application, the scenario may include a plurality of network devices and a plurality of terminal devices. For example, one terminal device may perform data transmission only with one network device, or may perform data transmission with multiple network devices, or one network device may perform data transmission with one terminal device, or may perform data transmission with multiple terminal devices, that is, the number of the terminal devices and the number of the network devices in fig. 1 are only examples, and in practical applications, one network device may provide services for multiple terminal devices, which is not specifically limited in this embodiment of the present application.

As described above, how to effectively demodulate a sequence is a problem to be considered, taking PUCCH0 sequence in 5G system as an example, the following is a demodulation algorithm for PUCCH0 sequence in the related art.

Step 1: according to the generation process of PUCCH0 sequences, 12 PUCCH sequences are generated

The sequence generated is called the local sequence, denoted P _j (k, l), j is 0-11, i.e. j can be any one of 0-11, when j takes different values, 12 are corresponded

One sequence in the sequence, k and l respectively represent a sonCarrier index, symbol index.

Step 2: screening out P needing to be subjected to cross-correlation calculation according to the corresponding relation of different UCI bits carried in the PUCCH0 sequence generation process _i (k, l) sequence, P screened therein _i I e pCs and pCs in the (k, l) sequence contain different values according to different situations. pCs is [ 0] if only SR requests are carried](ii) a pCs is [0,6 ] when only carrying HARQ ACK/NACK information of 1 or 2bits]Or [0,3,9,6 ]](ii) a When carrying 1 or 2bits HARQ ACK/NACK and SR request at the same time, pCs is [0,6,3,9 ]]Or [0,3,9,6,1,4,10,7 ]]. That is, the messages transmitted by the root UCI are different, and the local sequences selected for the cross-correlation calculation are generally different, for example, P selected for the cross-correlation calculation _i Sequence index for (k, l) sequence corresponds to m _CS Denotes that m is in accordance with the various conditions listed above _CS The values of (a) can be eight possible values of 0,3, 6, 9, 1,4,10 and 7.

And 3, step 3: according to the formula

R(k,l,a)P _i (k,l) ^* And performing cross-correlation calculation, wherein R (k, l, a) represents received PUCCH0 frequency domain data, k, l, a respectively represent subcarrier indexes, symbol indexes and receiving antenna indexes, and L, A respectively represent the total number of occupied symbols and the number of receiving antennas. C _i Represents to the ith m _CS Value corresponding to P _i (k, l) performing a cross-correlation calculation.

And 4, step 4: finding the maximum correlation value

And the maximum correlation value

Corresponding index i _max 。

And 5: calculating a noise value:

wherein nCsNum represents allThe total number of local sequences participating in the cross-correlation calculation.

Step 6: calculating the ratio:

and 7: HARQ-ACK/SR detection: firstly, judging whether the ratio fRatio obtained in step 6 exceeds a threshold value gF0THR, where the threshold value gF0THR is, for example, 6.16 at 1T2R (i.e., 1 transmitting antenna, 2 receiving antennas) and at 1 symbol, or is, for example, 6.04 at 1T2R and at 2 symbol, and if the threshold value gF0THR is not exceeded, determining that the UE does not send PUCCH0, i.e., does not send HARQ ACK/NACK or SR request, or the network side does not successfully demodulate; if the threshold value gF0THR is exceeded, it is determined that the maximum correlation value is obtained in either of two cases (HARQ ACK/NACK is transmitted separately, HARQ ACK/NACK and SR are transmitted simultaneously)

And the HARQ ACK/NACK and SR values of the corresponding sequence are demodulated to obtain the HARQ ACK/NACK and SR information.

In the demodulation method, the function of separately detecting the SR is not provided, and if the function of separately detecting the SR is added, at least 2P are required _i The (k, l) sequence is cross-correlated with the received signal (since at least 2 correlation values are needed to calculate the noise value), i.e. as step 5 above, only 6 UEs can be multiplexed on the same PUCCH0 resource (in case that the UE transmits PUCCH0 by multiplexing the same time-frequency resource, the base station can transmit PUCCH0 by different m ₀ Demodulating PUCCH0 sequences sent by different UEs and m corresponding to different UEs by using the values (within the range of 0-11) ₀ Different values), and does not meet the requirement of the protocol for supporting the multiplexing of at most 12 UEs, so the demodulation algorithm does not meet the functional requirement specified by the protocol.

Secondly, through the demodulation algorithm, under the conditions of a Tapped Delay Line model C (TDLC) -300-100Low channel, 1T2R, 30kHz subcarrier spacing and 100MHz bandwidth, the PUCCH 0ACK detection performance at 1 symbol is 0.5dB better than 10dB specified by a protocol; the PUCCH 0ACK detection performance is 4.8dB worse than the 3.7dB specified by the protocol when the symbol is 2; the error detection performance of the demodulation method for ACK is about 0.05 when the number of the symbols is 1 and 2, and the error detection performance is worse than 0.01 specified by the protocol, so that the demodulation algorithm also does not meet the performance requirement of the protocol.

In view of this, an embodiment of the present application provides a sequence demodulation method, and in particular, for a series (for example, a first sequence) that needs to be demodulated, a cross-correlation result obtained by performing cross-correlation on the first sequence and each candidate sequence in N candidate sequences is normalized to obtain N normalized results correspondingly, and then a maximum normalized value in the N normalized results is directly compared with a threshold, and when the maximum normalized value is greater than the threshold, information included in the first sequence is determined according to the candidate sequence corresponding to the maximum normalized value, that is, demodulation of the first sequence is implemented. In the method, a first sequence and each candidate sequence are subjected to cross-correlation calculation, and the obtained cross-correlation result is subjected to normalization processing.

Taking PUCCH0 sequence in 5G as an example, if the foregoing demodulation scheme of the related art is adopted, at least two local sequences are needed, and in the embodiment of the present application, at least one local sequence may be used, and there are 12 local sequences at most, so that 12 UEs can be supported to perform multiplexing to meet the functional requirements specified by the protocol.

Before introducing the sequence demodulation method in the embodiment of the present application, a generation procedure of the PUCCH0 sequence is described below with reference to the PUCCH0 sequence in the 5G system as an example.

PUCCH0 in the 5G system may carry HARQ ACK/NACK bits and SR bits, and the specific form may be: and the method comprises the steps of independently transmitting the SR information, independently transmitting 1 or 2bits HARQ ACK/NACK information and simultaneously transmitting 1 or 2bits HARQ ACK/NACK + SR information.

The PUCCH0 sequence is an uplink sequence transmitted from the terminal device to the network side device (e.g., base station).

PUCCH0 generates x (n) sequence from the following formula (1), and maps the x (n) sequence to time-frequency resources of port p ═ 2000:

therein

Indicates the number of Resource Elements (REs) contained in one PRB, the REs can be understood as subcarriers,

also called low Peak to Average Power Ratio sequence (low-PAPR sequence), represented by the following equation (2), there is no correlation between different sequences:

for M _ZC E {6,12,18,24} (M for PUCCH 0) _ZC ＝12)，

The definition is as follows:

wherein the content of the first and second substances,

is used for calculating the sequence in the formula (2)

One of the parameters of (1) is called base sequence (base sequence). Sequence of each cell

Only one, the sequence is phase rotated, i.e. multiplied by e ^jαn Thereby deriving a plurality of mutually orthogonal sequences

The correlation of the respective orthogonal sequences is low. The number of the sequences is determined by the value of a parameter alpha, wherein the value of alpha is an integer from 0 to 11, and the total number of alpha is 12.

The values of (a) can be referred to 5G protocol 3GPP TS 38.211Table 5.2.2-2, which is shown in Table 1 below.

TABLE 1

Next, the base sequence in equation (3) will be described

Parameter u (also called sequence group, sequence group) and parameter v (also called sequence number, sequence number) of (c), and in equation (2)

The cyclic shift α parameter of (2) is calculated, wherein the cyclic shift α may be referred to as a cyclic shift parameter α.

The calculation of u and v is described below.

u can be understood as the row index in Table 1 above, indicating that the u-th row is taken

Parameter generation

Sequence, v, is not used in PUCCH0 and will not be described herein.

From the high-level parameter pucch-grouppoping, u ═ (f) can be determined _gh +f _ss ) mod 30 and v.

1) If pucch-grouphoping is equal to 'neither', then:

if the higher layer parameter hoppingId has configuration, n _ID H hoppingId, otherwise

2) If pucch-grouphoping is equal to 'enable', then:

initial values of pseudo-random sequences (i.e., pseudo-random sequence c (i))

If the higher layer parameter hoppingId, n is configured _ID hoppingId, otherwise

3) If pucch-groupHopping is equal to 'disable', then:

wherein the initial value of pseudo-random sequence c (i) is

If higher layer parameter hoppingId, n is configured _ID hoppingId, otherwise

If no frequency is hopped in a slot, the frequency hopping index (i.e. frequency hopping index) n _hop 0; n of the first hop if configured as frequency hopping within slot _hop 0, n of the second hop _hop ＝1。

The calculation process of the cyclic shift α parameter is described below.

The cyclic shift alpha parameter is determined by slot number, symbol and other parameters, and the calculation formula is as follows:

in the formula (7), since

The value of (a) is 12 (since PUCCH0 occupies 1 PRB in the frequency domain, and 1 PRB includes 12 REs), so α has 12 values in total. When in formula (2)

After the determination, then

The sequence is determined by α, so there are 12 different low-PAPR sequences, among which:

is the number of REs (i.e., subcarriers) contained in one PRB;

is the slot number in a frame;

l is the starting symbol index sent by the pucch;

l' is the offset relative to the first pucch symbol;

m ₀ m of PUCCH0 ₀ Is configured by Radio Resource Control (RRC) parameter initial Cyclic Shift, m ₀ The value of (a) is an integer of 0-11, and each UE can be configured with different m ₀ When a plurality of UEs multiplex the same time-frequency resource to transmit PUCCH0, the base station can transmit the PUCCH0 according to m of each UE ₀ Demodulate the corresponding SR orHARQ ACK/NACK bits;

m _CS m of PUCCH0 _CS The values of (a) are divided into three cases: only SR is sent (at this time m _CS 0), only 1 or 2bits HARQ ACK/NACK bits are transmitted, 1 or 2bits HARQ ACK/NACK bits and SR information are simultaneously transmitted, as shown in tables 2.1 to 2.4 below, where table 2.1 indicates that PUCCH0 transmits only 1bit HARQ-ACK information, table 2.2 indicates that PUCCH0 transmits only 2bits HARQ-ACK information, table 2.3 indicates that PUCCH0 simultaneously transmits 1bit HARQ-ACK information and SR request, and table 2.4 indicates that PUCCH0 simultaneously transmits 2bits HARQ-ACK information and SR request.

TABLE 2.1

HARQ-ACK Value	0	1
			Sequence cyclic shift	m _CS ＝0	m _CS ＝6

TABLE 2.2

HARQ-ACK Value	{0,0}	{0,1}	{1,1}	{1,0}
					Sequence cyclic shift	m _CS ＝0	m _CS ＝3	m _CS ＝6	m _CS ＝9

TABLE 2.3

HARQ-ACK Value	0	1
			Sequence cyclic shift	m _CS ＝3	m _CS ＝9

TABLE 2.4

HARQ-ACK Value	{0,0}	{0,1}	{1,1}	{1,0}
					Sequence cyclic shift	m _CS ＝1	m _CS ＝4	m _CS ＝7	m _CS ＝10

Thus, when using PUCCH0, m occupied when the UE only sends an SR request _CS M of 1, i.e. 12, UEs ₀ The data are sequentially matched to be 0-11, so that a total of 12 UEs can simultaneously multiplex the same PUCCH0 time-frequency resource; when the UE only sends 1bit or 2bits HARQ ACK/NACK information, the occupied m _CS The number of the UE groups is 2 or 4, so that 6 or 3 UE groups can simultaneously multiplex the same PUCCH0 time-frequency resource; when the UE sends HARQ ACK/NACK information of 1bit or 2bits and SR request at the same time (note that, the SR only has the opportunity to send, so m which only sends HARQ-ACK is needed _CS Situation considerations), occupied m _CS The number is 4 or 8, and then there may be 3 or 1 UE multiplexing the same PUCCH0 time-frequency resource at the same time.

Function n in formula _cs (n _c L) is defined as follows:

if the higher layer parameter hoppingId has configuration, n _ID hoppingId, otherwise

Initial value c of pseudo random sequence c (i) _init ＝n _ID 。

Through the above-described generation process of the PUCCH0 sequence, it can be seen that various cases of PUCCH0 carrying UCI bits, that is, how PUCCH0 carries UCI bit information can be clarified, and a maximum of 12 UEs can be multiplexed on the same video resource.

The generation process of the PUCCH0 sequence on the terminal device side described above is existing in the 5G protocol, and a person skilled in the art can read relevant parts in the 5G protocol to understand. After the generation process of the PUCCH0 sequence at the terminal device side is described above, taking the PUCCH0 sequence as an example, the sequence demodulation method in the embodiment of the present application is described below with reference to fig. 2. The flow shown in fig. 2 is described as follows.

Step 201: a first sequence is received.

Taking as an example that the first sequence is a sequence of a PUCCH0 format, the first sequence is generated by the terminal device by using the method described above, and the first sequence is, for example, a PUCCH0 sequence.

The PUCCH0 sequence may carry HARQ ACK/NACK bits and SR bits, and the specific form may be: and the method comprises the steps of independently transmitting the SR information, independently transmitting 1 or 2bits HARQ ACK/NACK information and simultaneously transmitting 1 or 2bits HARQ ACK/NACK + SR information.

Step 202: from the M local sequences, N candidate sequences are selected.

After receiving the first sequence, the network device needs to demodulate the first sequence to clarify the information specifically included in the first sequence. The basic idea of the PUCCH0 sequence demodulation method in the embodiment of the present application is to perform frequency domain cross-correlation calculation on a local sequence and a received signal, perform normalization processing on an obtained cross-correlation result, and finally determine the normalization result to obtain final HARQ ACK/NACK or SR information.

First, the network device may generate M local sequences according to a sequence generation manner corresponding to the format of the first sequence, that is, all types of messages (i.e., sequences) transmitted in the format of the first sequence may be determined first, and then all types of messages (i.e., sequences) may be transmitted according to the format of the first sequence, respectivelyThe generation mode of each type of message in the type of messages generates a corresponding message sequence, for example, M local sequences are generated. The number of generated local sequences is related to the format of the first sequence, which is predefined in the protocol. For example, the first sequence is in a PUCCH0 format, and the network device may generate corresponding 12 local sequences according to a generation process of the PUCCH0 sequence

Is denoted by P _j (k, l), j is 0-11, i.e. j can be any one of 0-11, when j takes different values, 12 are corresponded

One of the sequences, k and l, respectively represent a subcarrier index and a symbol index.

Screening out P needing to be subjected to cross-correlation calculation according to the corresponding relation of different UCI bits carried in the PUCCH0 sequence generation process _i The (k, l) sequence pCs includes different values depending on the situation. If only SR request is carried, pCs is [ 0]](ii) a Carry only 1 or 2bits HARQ ACK/NACK information, pCs is [0,6 ]]Or [0,3,9,6 ]](ii) a Carries 1 or 2bits HARQ ACK/NACK and SR request at the same time, pCs is [0,6,3,9 ]]Or [0,3,9,6,1,4,10,7 ]]. That is, the messages transmitted by the root UCI are different, and the local sequences selected for the cross-correlation calculation are generally different, for example, P selected for the cross-correlation calculation _i Sequence index for (k, l) sequence corresponds to m _CS Denotes that m is in accordance with the various conditions listed above _CS The value of (b) can be eight values of 0,3, 6, 9, 1,4,10 and 7.

For a received first sequence to be demodulated, the network device may determine that the first sequence occupies several bits, and further determine, according to a correspondence between a bit number and a sequence index, a local sequence indicated by a sequence index corresponding to the bit number occupied by the first sequence in the M local sequences as a sequence to be subjected to cross-correlation calculation. For example, the first sequence is a PUCCH0 sequence, N candidate sequences selected from the 12 local sequences for performing the cross-correlation calculation may be 1,4 or 8, that is, N may be 1 or other positive integers.

Step 203: and respectively carrying out normalization processing on the cross-correlation results obtained by carrying out cross-correlation processing on the first sequence and each candidate sequence in the N candidate series to obtain corresponding N normalization results.

For each candidate sequence selected, for example, taking the ith candidate sequence as an example, the first sequence and the ith candidate sequence are subjected to cross-correlation calculation to obtain a cross-correlation result, and then the obtained cross-correlation result is subjected to normalization processing to obtain a normalization result corresponding to the ith candidate sequence. Thus, each candidate sequence is processed in this way, and N normalization results corresponding to the N candidate sequences can be obtained.

In a specific implementation, the N normalization results may be calculated according to the following formula (9), for example.

Wherein R (k, l, a) represents a first sequence, P _i (k, l) denotes the i-th candidate sequence of the N candidate sequences, fRatio _i Representing the ith normalization value in the N normalization results, wherein i is an integer from 1 to N in sequence; k denotes an index of a subcarrier used for carrying the first sequence, K denotes the number of REs included in the PRB occupied by the first sequence, L denotes a symbol index, a denotes an index of an antenna receiving the first sequence, L denotes a total number of occupied symbols, and a denotes the number of antennas receiving the first sequence.

The PUCCH0 sequence is an example, PUCCH0 only occupies one PRB in the frequency domain, and one PRB includes 12 REs, so when the first sequence is the PUCCH0 sequence, the value of K is 12, that is, the calculation formula for the PUCCH0 sequence is as follows:

in the formula (9), the numerator represents that the first sequence and each candidate sequence in each N candidate sequences are subjected to cross-correlation calculation to obtain a cross-correlation result, and then the cross-correlation result is subjected to denominator processing to represent that the cross-correlation result is subjected to normalization processing.

In the specific implementation process, the formula (9) can be appropriately deformed, and then cross-correlation and normalization processing can be performed through the deformed formula. For example, the square of the numerator and the square of the denominator in the formula (9) are simultaneously removed to obtain a first deformation formula, and then the normalization result is obtained by utilizing the first deformation formula; for another example, the numerator and the denominator in the formula (9) are both subjected to open square root processing to obtain a second deformation formula, and then the normalization result is obtained by utilizing the second deformation formula for calculation. That is, the formula (9) may be appropriately modified to obtain other formulas, and the formula obtained after the modification may be used to calculate the normalization value.

Step 204: it is determined whether a maximum normalized value of the N normalized results is greater than a threshold.

For the N normalized values obtained in step 203, the normalized values are represented by fRatio, and the largest normalized value can be found and recorded as

And i index of its corresponding candidate sequence

The threshold value for reference comparison is determined from the number of symbols occupied by the first sequence and the number of receiving antennas, and is referred to as a target threshold value, for example. For the cases that different numbers of symbols are occupied and the number of receiving antennas is different, different thresholds may be preset, the PUCCH0 sequence occupies 1 symbol or 2 symbols, the number of receiving antennas is generally 1, 2, 4, and 8, and various cases of the number of symbols and the number of receiving antennas are combined, so that 8 combination cases may be obtained, for example, 1 symbol +1 receiving antenna, 1 symbol +2 receiving antenna, 2 symbol +4 receiving antenna, and the like. Different thresholds are pre-configured for each combination of the number of symbols and the number of receive antennas, for example, 3.3206 for a 1 symbol +2 receive antenna and 2.5491 for a 2 symbol +2 receive antenna.

At the maximum normalized value

Then, the corresponding target threshold value can be determined according to the combination of the number of symbols occupied by the first sequence and the number of receiving antennas, and then the maximum normalization value is obtained

And comparing the size of the target threshold value with the determined target threshold value.

The threshold corresponding to each combination of the number of symbols and the number of receiving antennas may be obtained in advance through simulation, and specifically, a plurality of analog sequences having the same format as that of the first sequence may be transmitted, and each threshold may be determined according to a simulation result obtained by performing analog demodulation on the plurality of analog sequences in a preset simulation environment so as to achieve a specified demodulation index. The preset simulation environment comprises different simulation sequences carried by combinations of different symbol numbers and receiving antenna numbers. That is, the preset threshold may be determined by numerical simulation, and the specific simulation determination method is as follows:

1) performing ACK detection rate and ACK error detection rate at Signal to Noise Ratio (SNR) specified by protocol

Counting; under the conditions of TDLC-300-100Low channel, 30kHz subcarrier interval, 100MHz bandwidth and 1 transmission and 2 reception, the SNR required by the 1-symbol ACK detection performance (namely the ACK detection rate is more than or equal to 0.99 and the ACK error detection rate is less than or equal to 0.01) is 10dB, and the SNR required by the 2-symbol ACK detection performance is 3.7 dB.

2) According to statistics

A corresponding Cumulative Distribution Function (CDF) is plotted, as shown in fig. 3 and 4. Fig. 3 is a CDF curve corresponding to the ACK detection rate and the ACK error detection rate at 1 symbol and 10dB SNR, and more specifically, a CDF curve corresponding to the ACK detection rate and the ACK error detection rate at TDLC-300-100Low channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth, 10dB SNR and 1 symbol; fig. 4 is a CDF curve corresponding to the ACK detection rate and the ACK error detection rate at 3.7dB SNR with 2 symbols, and more specifically, a CDF curve corresponding to the ACK detection rate and the ACK error detection rate at 2 symbols with TDLC-300 and 100Low channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth, 3.7dB SNR.

Then according to the requirement that the ACK false detection probability is less than 0.01, the user finds the ACK false detection probability

Corresponding value fRatio when probability equals 0.99 _{falseDetect＝0.99} (estimated error rate 0.01 x 0.5 ═ 0.005). We correspond at the ACK detection rate

Find fRatio on the CDF curve of (1) _{falseDetect＝0.99} Checking whether the probability is less than or equal to 0.01 (the ACK detection rate is more than 0.99), if so, judging that the fRatio is in accordance with the requirement _{falseDetect＝0.99} Is defined as a threshold value.

3) From the analysis of step 2), in conjunction with fig. 3 and 4, it can be determined that the threshold value corresponding to symbol 1 is 3.3206 and the threshold value corresponding to symbol 2 is 2.5419.

Other thresholds may be similarly determined in the manner described above, and will not be described here.

Step 205: and when the maximum normalization value is larger than the threshold value, determining the information included by the first sequence according to the candidate sequence corresponding to the maximum normalization value.

If the maximum normalized value

And if the value is larger than the determined target threshold value, determining the information included in the first sequence according to the candidate sequence corresponding to the maximum normalization value. For the PUCCH0 sequence, if the maximum normalized value exceeds the threshold, it is determined that i is the case where one of three cases (SR is transmitted independently, HARQ ACK/NACK and SR are transmitted simultaneously) is transmitted _max (i.e., m) _CS ) And the HARQ ACK/NACK and SR values corresponding to the values are demodulated to obtain the HARQ ACK/NACK and SR information.

If the maximum normalized value

If the target threshold is not exceeded, that is, the maximum normalized value is less than or equal to the target threshold, the terminal device may be considered to transmit a sequence error, or to determine that demodulation fails, or the terminal device may be considered to not transmit HARQ ACK/NACK or SR request.

In the embodiment of the present application, for PUCCH0 sequence, when multiple UEs transmit SR requests using PUCCH0 in the same time-frequency resource position, because pCs ═ 0](i.e., m) _CS 0), only 1 candidate sequence (i.e. local sequence) is used to perform cross-correlation and normalization with the first sequence during demodulation, and the base station can perform cross-correlation and normalization according to m of different UEs ₀ (maximum 12 UEs, that is, maximum 12 UEs can be supported to multiplex the same time frequency resource to transmit PUCCH0 sequence, m, carrying only SR information ₀ 0-11) to demodulate the received multiplexed PUCCH0 signal, and obtain UCI bit information transmitted by each UE. Similarly, for the HARQ ACK/NACK information only transmitting 1bit or 2bits and the HARQ ACK/NACK + SR information simultaneously transmitting 1bit or 2bits, the number of UEs multiplexing the same time-frequency resource can also be analyzed by the same method, where for the former case, the number of multiplexed UEs is 6 or 3, and for the latter case, the number of multiplexed UEs is 3 or 1.

By adopting the sequence demodulation method provided by the embodiment of the application, better demodulation indexes can be achieved, and the following description is given through actual simulation verification.

The ACK missed detection performance requirement of the single-user PUCCH0 is determined by two parameters: the probability of false detection of ACK and the probability of detection of ACK. The added SNR is such that the detection probability reaches 0.99 and the false detection probability of ACK is equal to or less than 0.01. Wherein the false detection probability of ACK is defined as the probability of false detection of ACK when the input is only noise; the detection probability of ACK is defined as the probability that ACK is detected when there is an ACK signal. Some simulation parameters are listed in table 3.

TABLE 3

The following are simulation results.

The sequence demodulation method of the embodiment of the application aims at the ACK omission performance of a PUCCH0 sequence under a TDLC channel:

as shown in fig. 5, fig. 5 is a schematic diagram of PUCCH 0ACK detection performance at TDLC-300-100Low channel, 1T2R, 30kHz subcarrier spacing, and 100MHz bandwidth, where the delay spread of the TDLC-300-100Low channel is 300ns, the maximum doppler shift is 100Hz, and the Multiple-Input Multiple-Output (MIMO) correlation is Low. As can be seen from fig. 5, under the conditions of TDLC-300-100Low channel, 1 transmission and 2 reception (i.e. 1T2R), 30kHz subcarrier spacing, and 100MHz bandwidth, the SNR corresponding to PUCCH 0ACK detection performance in the embodiment of the present application at 1 symbol is 8dB, which is 2dB better than 10dB specified by the protocol; when the symbol 2 is used, the SNR corresponding to the PUCCH 0ACK detection performance in the embodiment of the present application is 1.2dB, which is 2.5dB better than 3.7dB specified by the protocol.

Referring to fig. 6 again, fig. 6 is a diagram of PUCCH 0ACK error detection performance in TDLC-300-100Low channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth. As can be seen from fig. 6, under the conditions of the TDLC-300-100Low channel, 1 transmission, 2 reception, 30kHz subcarrier spacing, and 100MHz bandwidth, the PUCCH 0ACK error detection performance in the embodiment of the present application is better than the 0.01 specified by the protocol when 1 symbol and 2 symbols are used.

In summary, the sequence demodulation algorithm provided in the embodiment of the present application can demodulate the PUCCH0 sequence to meet and exceed the protocol requirement, and the performance is improved by about 2.5 dB.

Second, the sequence demodulation method according to the embodiment of the present application has ACK missing detection performance for a PUCCH0 sequence in an Additive White Gaussian Noise (AWGN) channel:

as shown in fig. 7, fig. 7 is a diagram of PUCCH 0ACK detection performance in AWGN channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth. As can be seen from fig. 7, under the conditions of AWGN channel, 1 transmission and 2 reception, 30kHz subcarrier spacing, and 100MHz bandwidth, the SNR corresponding to the PUCCH 0ACK detection performance in the embodiment of the present application reaches-0.5 dB at 1 symbol; and when the symbol is 2, the SNR corresponding to the PUCCH 0ACK detection performance in the embodiment of the application reaches-3 dB.

As shown in fig. 8, fig. 8 is a diagram of PUCCH 0ACK error detection performance in AWGN channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth. As can be seen from fig. 8, under the conditions of AWGN channel, 1 transmission, 2 reception, 30kHz subcarrier spacing, and 100MHz bandwidth, PUCCH 0ACK error detection performance in the embodiment of the present application is better than 0.01 specified by the protocol for both 1 symbol and 2 symbols.

Thirdly, the sequence demodulation method of the embodiment of the application aims at the time offset resistance of the PUCCH0 sequence under the AWGN channel:

as shown in fig. 9, fig. 9 is a diagram of PUCCH0 time offset resistance performance in AWGN channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth, 20dB SNR. As can be seen from fig. 9, under the conditions of AWGN channel, 1 transmission and 2 reception, 30kHz subcarrier spacing, 100MHz bandwidth, and 20dB SNR (common signal-to-noise ratio), the 1-symbol time offset range is about [ -180,180] samples, and the 2-symbol time offset range is [ -210,210] samples. The time offset of a general 5G system is within 100 sampling points, and thus it can be seen that the time offset tolerance of the sequence demodulation algorithm in the embodiment of the present application is strong.

Fourthly, the sequence demodulation method of the embodiment of the application aims at the frequency offset resistance of the PUCCH0 sequence under the AWGN channel:

as shown in fig. 10, fig. 10 is a schematic diagram of the anti-frequency offset performance of PUCCH0 in AWGN channel, 1T2R, 30kHz subcarrier spacing, 100MHz bandwidth, demodulation threshold SNR. As can be seen from fig. 10, under the conditions of AWGN channel, 1 transmission, 2 reception, 30kHz subcarrier spacing, 100MHz bandwidth, and demodulation threshold SNR (1 symbol is-0.5 dB, 2 symbol is-3 dB), the frequency offset resistance range is about-2400,2400 Hz for 1 symbol, and about-2400,2400 Hz for 2 symbol. The frequency offset of the 5G system is required to be within 0.1ppm, and calculated by the central frequency of 2.565GHz, the frequency offset range is far smaller than the range of [ -256.5,256.5] Hz in the embodiment of the present application, so that the frequency offset tolerance of the sequence demodulation algorithm in the embodiment of the present application is strong.

From the above analysis, it can be known that the sequence demodulation algorithm (for example, demodulation for the PUCCH0 sequence) provided in the embodiment of the present application can guarantee correct demodulation of PUCCH0 under severe conditions (i.e., fading channel, low signal-to-noise ratio, high time offset, and high frequency offset), and meet the functional requirement and performance requirement specified by the protocol.

Based on the same inventive concept, embodiments of the present application provide an information transmission apparatus, where the sequence demodulation apparatus may be, for example, the network device described in the foregoing embodiments, and the sequence demodulation apparatus may be implemented by a chip system, and the chip system may be formed by a chip, or may include a chip and other discrete devices. Referring to fig. 11a, a sequence demodulation apparatus in the embodiment of the present application includes a receiving module 1101, a normalizing module 1102, a determining module 1103, and a demodulating module 1104, where:

a receiving module 1101, configured to receive a first sequence;

a normalization module 1102, configured to perform normalization on cross-correlation results obtained by performing cross-correlation on the first sequence and each candidate sequence in the N candidate sequences, respectively, to obtain N corresponding normalization results, where N is a positive integer;

a determining module 1103, configured to determine whether a maximum normalization value in the N normalization results is greater than a threshold;

and a demodulation module 1104, configured to determine information included in the first sequence according to the candidate sequence corresponding to the maximum normalization value when the maximum normalization value is greater than the threshold.

In one possible implementation, the normalization module 1102 is configured to:

n normalization results are obtained by calculation according to the following formula:

wherein R (k, l, a) represents a first sequence, P _i (k, l) denotes the i-th candidate sequence of the N candidate sequences, fRatio _i Representing the ith normalization value in the N normalization results, wherein i is an integer from 1 to N in sequence; k denotes an index of a subcarrier used to carry the first sequence, K denotes the number of REs included in the PRB occupied by the first sequence, L denotes a symbol index, a denotes an index of an antenna receiving the first sequence, L denotes the total number of occupied symbols, and a denotes the number of antennas receiving the first sequence.

In a possible implementation manner, please refer to fig. 11b, the sequence demodulation apparatus in this embodiment further includes a first determining module 1105, configured to determine a threshold according to the number of symbols occupied by the first sequence and the number of receiving antennas of the first sequence before the determining module 1103 determines whether the maximum normalized value of the N normalized results is greater than the threshold.

In a possible implementation manner, please refer to fig. 11b, the sequence demodulation apparatus in this embodiment further includes a configuration module 1106, configured to, before the first determining module 1105 determines the threshold according to the number of symbols occupied by the first sequence and the number of receiving antennas of the first sequence, perform analog demodulation according to a plurality of analog sequences in a preset analog environment to achieve an analog result of a specified demodulation index, and configure the threshold, where each analog sequence in the plurality of analog sequences has the same format as the first sequence, and the preset analog environment includes carrying different analog sequences by a plurality of different combinations of the number of symbols and the number of receiving antennas.

In a possible implementation manner, please refer to fig. 11b, the sequence demodulation apparatus in this embodiment further includes a second determining module 1107, configured to determine M local sequences corresponding to the format of the first sequence before the normalizing module 1102 performs normalization processing on the cross-correlation result obtained by performing cross-correlation processing on the first sequence and each candidate sequence of the N candidate sequences, where M is an integer greater than or equal to N; determining the bit number occupied by the first sequence; and determining the local sequence indicated by the sequence index corresponding to the bit number occupied by the first sequence in the M local sequences as N candidate sequences according to the corresponding relation between the bit number and the sequence index.

In a possible implementation, a second determining module 1107 is used to determine all types of messages transmitted in the format of the first sequence; and respectively generating a corresponding message sequence according to the generation mode of each type of message in all types to obtain M local sequences.

In a possible implementation manner, the demodulation module 1104 is configured to determine a message type corresponding to the first sequence according to a pre-scheduled transmission resource; and demodulating the candidate sequence corresponding to the maximum normalization value to obtain the sequence content corresponding to the message type.

All relevant contents of each step related to the foregoing embodiment of the sequence demodulation method can be cited to the functional description of the functional module corresponding to the sequence demodulation apparatus in the embodiment of the present application, and are not described herein again.

The division of the units in the embodiments of the present application is schematic, and only one logic function division is used, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more units. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Based on the same inventive concept, embodiments of the present application provide a communication device, which is a network device such as a base station capable of demodulating a sequence. Referring to fig. 12, the communication device includes at least one processor 1201 and a memory 1202 connected to the at least one processor, a specific connection medium between the processor 1201 and the memory 1202 is not limited in this embodiment, in fig. 12, the processor 1201 and the memory 1202 are connected by a bus 1200 as an example, the bus 1200 is shown by a thick line in fig. 12, and a connection manner between other components is only schematically illustrated and is not limited. The bus 1200 may be divided into an address bus, a data bus, a control bus, etc., and is shown in fig. 12 with only one thick line for ease of illustration, but does not represent only one bus or type of bus.

The communication device in this embodiment of the application may further include a communication interface 1203, where the communication interface 1203 is, for example, a network port, and the computing device may transmit data through the communication interface 1203, for example, receive a data packet or a message sent by another communication device, or may send a data packet or a message to another communication device.

In the embodiment of the present application, the memory 1202 stores instructions executable by the at least one processor 1201, and the at least one processor 1201 can execute the steps included in the foregoing sequence demodulation method by executing the instructions stored in the memory 1202.

The processor 1201 is a control center of the communication device, and may connect various parts of the entire computing device by using various interfaces and lines, and perform various functions and process data of the computing device by operating or executing instructions stored in the memory 1202 and calling data stored in the memory 1202, thereby performing overall monitoring of the computing device. Optionally, the processor 1201 may include one or more processing units, and the processor 1201 may integrate an application processor and a modem processor, wherein the application processor mainly handles operating systems, application programs, and the like, and the modem processor mainly handles wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 1201. In some embodiments, the processor 1201 and the memory 1202 may be implemented on the same chip, or in some embodiments, they may be implemented separately on separate chips.

The processor 1201 may be a general-purpose processor, such as a Central Processing Unit (CPU), digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like, that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the sequence demodulation method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

Memory 1202, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 1202 may include at least one type of storage medium, and may include, for example, a flash Memory, a hard disk, a multimedia card, a card-type Memory, a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Programmable Read Only Memory (PROM), a Read Only Memory (ROM), a charge Erasable Programmable Read Only Memory (EEPROM), a magnetic Memory, a magnetic disk, an optical disk, and so on. The memory 1202 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 1202 in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

Further, the communication device includes a basic input/output system (I/O system) 1204, a mass storage device 1208 for storing an operating system 1205, application programs 1206, and other program modules 1207 that facilitate the transfer of information between the various devices within the communication device.

The basic input/output system 1204 includes a display 1209 for displaying information and an input device 1210 such as a mouse, keyboard, etc. for user input of information. Where a display 1209 and an input device 1210 are connected to the processor 1201 through the basic input/output system 1204 connected to the system bus 1200. The basic input/output system 1204 may also include an input/output controller for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, an input-output controller may also provide output to a display screen, a printer, or other type of output device.

The mass storage device 1208 is connected to the processor 1201 through a mass storage controller (not shown) connected to the system bus 1200. The mass storage device 1208 and its associated computer-readable media provide non-volatile storage for the server package. That is, the mass storage device 1208 may include a computer-readable medium (not shown) such as a hard disk or CD-ROM drive.

According to various embodiments of the present application, the communication device package may also operate with a remote computer connected to a network via a network, such as the Internet. That is, the communication device may be connected to the network 1211 via the communication interface 1203 connected to the system bus 1200, or the communication interface 1203 may be used to connect to another type of network or a remote computer system (not shown). The communication interface 1203 is implemented as a receiver, a transmitter, or a transceiver integrating transceiving functions.

By programming the processor 1201, the code corresponding to the sequence demodulation method described in the foregoing embodiment may be fixed in the chip, so that the chip can execute the steps of the sequence demodulation method when running, and how to program the processor 1201 is a technique known by those skilled in the art, and is not described herein again.

Based on the same inventive concept, the present application also provides a storage medium, such as a computer readable storage medium, which stores computer instructions that, when executed on a computer, cause the computer to perform the steps of the sequence demodulation method as described above.

In some possible embodiments, the various aspects of the sequence demodulation method provided herein may also be implemented in the form of a program product comprising program code for causing a communication device to perform the steps of the sequence demodulation method according to various exemplary embodiments of the present application described above in this specification, when the program product is run on the communication device.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for sequence demodulation, the method comprising:

receiving a first sequence;

respectively normalizing the cross-correlation results obtained by cross-correlating the first sequence and each of the N candidate sequences to obtain N corresponding normalized results, wherein N is a positive integer;

2. The method of claim 1, wherein the normalizing the cross-correlation results obtained by cross-correlating the first sequence with each of the N candidate sequences to obtain N normalized results comprises:

the N normalization results are obtained by calculation according to the following formula:

wherein R (k, l, a) represents the first sequence, P _i (k, l) denotes the i-th candidate sequence, fRatio, of the N candidate sequences _i Expressing the ith normalization value in the N normalization results, wherein i is an integer from 1 to N; k represents an index of a subcarrier used for carrying the first sequence, and K represents a physical resource block PRB occupied by the first sequenceThe number of included resource elements RE, L represents a symbol index, a represents an index of an antenna receiving the first sequence, L represents a total number of occupied symbols, and a represents the number of antennas receiving the first sequence.

3. The method of claim 1, wherein prior to determining whether a maximum normalized value of the N normalized results is greater than a threshold value, the method further comprises:

4. The method of claim 3, wherein prior to determining the threshold based on the number of symbols occupied by the first sequence and the number of receive antennas of the first sequence, the method further comprises:

5. The method of claim 1, wherein before normalizing the cross-correlation results obtained by cross-correlating the first sequence with each of the N candidate sequences, the method further comprises:

determining the bit number occupied by the first sequence;

6. The method of claim 5, wherein determining M local sequences corresponding to the format of the first sequence comprises:

7. The method of claim 1, wherein determining the information included in the first sequence according to the candidate sequence corresponding to the maximum normalization value comprises:

8. An apparatus for sequence demodulation, the apparatus comprising:

a receiving module, configured to receive a first sequence;

9. A communication device, characterized in that the communication device comprises:

a memory for storing program instructions;

a processor for calling program instructions stored in said memory and for executing the steps comprised in the method of any one of claims 1 to 7 in accordance with the obtained program instructions.

10. A storage medium storing computer-executable instructions for causing a computer to perform the steps comprising the method of any one of claims 1-7.