WO2018103008A1

WO2018103008A1 - Digital communication system and bit error rate calculation method

Info

Publication number: WO2018103008A1
Application number: PCT/CN2016/108850
Authority: WO
Inventors: 尹瑞华; 张颖哲; 朱德友
Original assignee: 海能达通信股份有限公司
Priority date: 2016-12-07
Filing date: 2016-12-07
Publication date: 2018-06-14

Abstract

The present application provides a digital communication system and a bit error rate calculation method. The method comprises: receiving and storing first coded data sent by a sender device via a channel to be tested, wherein the first coded data is obtained by channel coding of source data; performing an error correction decoding operation on the first coded data; reverse encoding the source data, obtained after the error correction decoding of the first coded data is successful, to obtain second coded data; and calculating, on the basis of the first coded data and the second coded data, a bit error rate of the channel to be tested. The bit error rate calculation method provided in the application can calculate a bit error rate without requiring a receiver device to pre-store source data, thereby improving channel resource utilization.

Description

Digital communication system and calculation method of bit error rate

Technical field

The present application relates to the field of communications technologies, and in particular, to a digital communication system and a method for calculating a bit error rate.

Background technique

In digital communication systems, channel quality is an important basis for judging system performance. The bit error rate can be used to characterize the channel quality to some extent. The bit error rate is the ratio of the number of error bits to the number of all bits. If the bit error rate is large, the number of error bits is large, that is, the channel quality is poor; if the bit error rate is small, the number of error bits is small, that is, the channel quality is good; therefore, the bit error rate can be used to characterize the channel quality. .

In order to calculate the bit error rate, the usual method is: the sender device and the receiver device store the same source data in advance, and then the sender device transmits the source data to the receiver device through the channel, and then the receiver device will receive the source data. Compared with the pre-stored source data, the number of error bits in the received source data is determined, and finally, the quotient of the number of error bits and the number of bits of the source data is determined as the bit error rate.

Although using the bit error rate to determine channel quality is the most accurate. However, the current calculation of the error rate is based on the premise that both the sender device and the receiver device store the same source data in advance. For the receiver device, the source data to be transmitted by the sender device is known data. In a digital communication system, the transmission of known data by the communicating parties is a waste of channel resources, which affects the use of channel resources by other services.

Summary of the invention

In view of this, the present application provides a method for calculating a bit error rate so that the bit error rate can be calculated without the pre-stored source data in the receiver device, thereby improving channel resource utilization.

In order to achieve the above object, the present application provides the following technical means:

A method for calculating a bit error rate, including:

Receiving and storing first encoded data that is sent by the sending device through the channel to be tested; wherein the first encoded data is obtained by channel encoding the source data;

Performing an error correction decoding operation on the first encoded data;

After the error correction decoding of the first encoded data is successful, the source data obtained after the error correction decoding is inversely encoded to obtain the second encoded data;

Calculating a bit error rate of the channel to be tested based on the first encoded data and the second encoded data.

Preferably, the method further includes:

When the error correction decoding of the first encoded data fails, setting the error rate of the channel to be tested is a preset character.

Preferably, the method further includes:

When the error correction decoding of the first encoded data fails, it is determined whether the data type field can be decoded;

If the data type field is successfully decoded, and the data type field is a preset type, the first data symbol is obtained from the first encoded data;

Determining data content corresponding to the preset type, and performing inverse encoding on the data content to obtain a second data symbol;

Calculating the error of the channel to be tested based on the first data symbol and the second data symbol Code rate.

Preferably, the method further includes:

If the data type field is not successfully decoded, or the data type field obtained by the decoding is not a preset type, the error rate of the channel to be tested is set as a preset character.

Preferably, before performing the error correction decoding operation on the first encoded data, the method further includes: performing an operation of acquiring a frame synchronization data in the first encoded data;

If the error correction decoding of the first encoded data fails, or if the data type field is not successfully decoded, or if the data type field is successfully decoded but the data type field is not a preset type, it is determined whether the first encoded data is successfully obtained. One frame of synchronous data;

If the first frame synchronization data is successfully acquired in the first encoded data, storing the first frame synchronization data;

Determining the second frame synchronization data in the storage space;

And calculating a bit error rate of the channel to be tested based on the first frame synchronization data and the second frame synchronization data.

Preferably, the method further includes:

If the first frame synchronization data is not successfully obtained in the first encoded data, setting a bit error rate of the channel to be tested is a preset character.

Preferably, the method further includes:

Calculating multiple error rates of the channel to be tested;

The average error rate of the channel to be tested is determined based on the multiple error rates of the channel to be tested.

Preferably, the determining, according to the multiple error rates of the channel to be tested, the average error rate of the channel to be tested, including:

Determining whether multiple error rates of the channel to be tested include preset characters;

If the multiple error rate of the channel to be tested does not include the preset character, the average value of the multiple bit error rates of the channel to be tested is determined as the average bit error rate of the channel to be tested.

Preferably, the method further includes:

If the multiple error rate of the channel to be tested includes a preset character, it is determined whether more than half of the preset characters are included in the multiple error rate;

If more than half of the preset characters are included in the multiple bit error rate, the bit error rate of the channel to be tested is set to a preset value.

Preferably, the method further includes:

If more than half of the preset characters are not included in the plurality of bit error rates, it is determined whether more than 1/4 of the preset characters are included in the plurality of bit error rates;

If a plurality of BERs include more than 1/4 of the preset characters, each preset character is assigned a value of 5%, and an average value is calculated with the error rate of the other non-preset characters, and the average value is determined as The average bit error rate of the channel to be tested;

If a plurality of BERs do not include more than 1/4 of the preset characters, after the preset characters are excluded, the average value of the error rate of the other non-preset characters is calculated, and the average value is determined as the channel to be tested. The average bit error rate.

A digital communication system comprising:

a sender device, configured to transmit first encoded data by using a channel to be tested; wherein the first encoded data is obtained by channel coding of the source data;

a receiving device, configured to receive and store the first encoded data, perform an error correction decoding operation on the first encoded data, and after decoding and decoding the first encoded data successfully, after decoding the error correction The obtained source data is inversely encoded to obtain second encoded data; and based on the first encoded data and the second encoded data, a bit error rate of the channel to be tested is calculated.

A method for calculating a bit error rate, including:

Receiving first encoded data that is sent by the sending device through the channel to be tested; wherein the first encoded data is obtained by channel encoding the source data;

Performing an operation of acquiring frame synchronization data in the first encoded data;

If the first frame synchronization data is successfully obtained in the first encoded data, storing the first frame synchronization data;

Determining the second frame synchronization data in the storage space;

Preferably, the method further includes:

A digital communication system comprising:

a receiving device, configured to receive, by using the first encoded data sent by the sending device by using the channel to be tested, performing an operation of acquiring frame synchronization data in the first encoded data; and successfully obtaining a first frame synchronization in the first encoded data Data, storing the first frame synchronization data; determining second frame synchronization data in the storage space; calculating a bit error rate of the channel to be tested based on the first frame synchronization data and the second frame synchronization data.

A method for calculating a bit error rate, including:

In the process of performing error correction decoding on the first encoded data, determining whether the data type field can be decoded;

If the data type field is successfully decoded and the data type field is a preset type, the first data symbol is obtained from the first encoded data;

Calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.

Preferably, the method further includes:

If the data type field is not successfully decoded, or the data type field is not a preset type, the bit error rate is set as a preset character.

A digital communication system comprising:

The receiving device is configured to receive the first encoded data sent by the sending device through the channel to be tested, and perform error correction decoding on the first encoded data to determine whether the data type field can be decoded; if the data is successfully decoded The type field and the data type field are preset types, the first data symbol is obtained from the first encoded data; the data content corresponding to the preset type is determined, and the data content is inversely encoded to obtain the first Two data symbols; calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.

A receiver device, comprising:

a first communication module, configured to receive first encoded data that is sent by the sending device by using the channel to be tested; where the first encoded data is obtained by channel encoding the source data;

a memory, configured to store first encoded data that is sent by the sending device through the channel to be tested;

a first processor, configured to perform an error correction decoding operation on the first encoded data, and after performing error correction decoding on the first encoded data, performing reverse coding on the source data obtained after error correction decoding to obtain a second Encoding data, based on the first encoded data and the second encoded data, calculating a bit error rate of the channel to be tested.

A receiver device, comprising:

a second communication module, configured to receive first encoded data that is sent by the sending device by using the channel to be tested; where the first encoded data is obtained by channel encoding the source data;

a second processor, configured to perform an operation of acquiring frame synchronization data in the first encoded data, and if the first frame synchronization data is successfully obtained in the first encoded data, storing the first frame synchronization data, and storing The second frame synchronization data is determined in the space; and the error rate of the channel to be tested is calculated based on the first frame synchronization data and the second frame synchronization data.

A receiver device, comprising:

a third communication module, configured to receive first encoded data that is sent by the sending device by using the channel to be tested; where the first encoded data is obtained by channel encoding the source data;

a third processor, in the process of performing error correction decoding on the first encoded data, determining whether the data type field can be decoded, and if the data type field is successfully decoded and the data type field is a preset type, Obtaining a first data symbol in an encoded data, determining a data content corresponding to the preset type, and performing inverse encoding on the data content to obtain a second data symbol, Calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.

Through the above technical means, the following beneficial effects can be achieved:

The present application provides a method for calculating a bit error rate. The receiver of the present application obtains source data by error correction decoding based on the first encoded data, and does not need to store the source data in the receiving device; and then reverses the source data. The encoding obtains the second encoded data, and the error rate of the channel to be tested is obtained by comparing the first encoded data with the second encoded data.

Since the present application does not need to store source data in the recipient device, the recipient device does not know the source data transmitted by the sender device. That is, in the present application, the sender device and the receiver device do not transmit the known data, so no waste of channel resources is caused, so as to improve the utilization of channel resources.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1a-1c are schematic diagrams showing the structure of a digital communication system.

2 is a flowchart of a method for calculating a bit error rate provided by the present application;

3 is a flowchart of still another method for calculating a bit error rate provided by the present application;

4 is a flowchart of still another method for calculating a bit error rate provided by the present application;

FIG. 5 is a flowchart of still another method for calculating a bit error rate provided by the present application;

FIG. 6 is a flowchart of calculating a bit error rate based on multiple error rates provided by the present application.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

The application scenario of the present application is described below. In the digital communication system, the two parties are called a sender device and a receiver device. The solution provided by the present application may be set on the receiver device, so that the receiver device can determine the channel quality of the channel based on the data object after receiving the data object through the channel.

The following describes the communication parties in the digital communication system, so that those skilled in the art can clearly understand the application scenario of the present application.

Referring to FIG. 1a, the communication parties may be a base station and a terminal, and the base station (sender device) may send data to the terminal (receiver device) through the channel; the terminal (sender device) may also send data to the base station (receiver device) through the channel. .

Referring to FIG. 1b, the communication parties can also be terminals and a transfer station. The transfer station (sender device) can transmit data to the terminal (receiver device) through the channel; the terminal (sender device) can also transmit data to the transfer station (receiver device) through the channel.

Referring to FIG. 1c, the two communication parties may also be two terminals: a first terminal and a second terminal. The first terminal (sender device) may send data to the second terminal (receiver device) through the channel; The second terminal (sender device) may also transmit data to the first terminal (receiver device) through the channel.

The terminal in FIG. 1a - FIG. 1c is represented by a digital walkie-talkie in the illustration, but the scope of the terminal in the present application is not limited to a digital walkie-talkie, and may also be a device such as a smart phone, a tablet computer, or a desktop computer.

Of course, the two communication parties in the digital communication system may also have other implementation manners, which are not enumerated here.

There are multiple channels between the communicating parties in the digital communication system, and the process of determining the channel quality of each channel is consistent. Therefore, the present application takes a channel of multiple channels as an example to describe in detail the process of determining channel quality. For convenience of description, the channel is referred to as a channel to be tested.

In a digital communication system, a DMR frame in a Digital Mobile Radio (DMR) has a length of 60 ms, which occupies 2 time slots, and each time slot occupies 30 ms. One time slot is called a Protocol Data Unit (Protocol Data Unit), that is, each PDU frame occupies 30 ms.

If the error rate is calculated between the terminal and the terminal, the terminal corresponding to the receiver device can calculate only the error rate of one of the time slots, that is, the 30 ms source data. If the bit error rate between the terminal and the transfer station, or the bit error rate is calculated between the terminal and the base station, since the transfer station and the base station are transmitting data in both time slots of one DMR frame, the receiver The device may select one time slot in the DMR frame to calculate the error rate, and may also use the source data of the two time slots in the DME frame to calculate the bit error rate.

The present application provides various implementation manners of a method for calculating a bit error rate, and various implementation manners are respectively described in detail below.

The first implementation manner uses the first encoded data to calculate the bit error rate.

As shown in FIG. 2, this embodiment provides a first embodiment of a method for calculating a bit error rate, which specifically includes the following steps:

Step S201: The sender device sends the first coded data to the receiver device through the channel to be tested. The first encoded data is obtained by channel coding the source data.

The purpose of channel coding is to overcome the effects of noise and interference in the channel on the source data. The process of channel coding is to add some necessary supervised symbols in the symbols (artificial) of the information to be transmitted according to a certain (supervised) law. This can facilitate the receiver device to utilize the supervision rules between these supervised symbols and information symbols to find and correct errors, thereby improving the reliability of transmission of information symbols.

The technician can set the preset encoding rule before this step. The sender device may perform channel coding on the source data according to a preset coding rule, and obtain channel-coded first encoded data. The sender device can obtain the first encoded data, and then send the first encoded data to the receiving device through the channel to be tested.

Step S202: The receiver device receives and stores the first encoded data.

After receiving the first encoded data, the receiving device first stores the first encoded data for use in subsequent calculation of the error rate.

Step S203: The receiving device performs an error correction decoding operation on the first encoded data. If the error correction decoding is successful, the process proceeds to step S204. If the error correction decoding fails, the process proceeds to step S206.

Step S204: Perform reverse coding on the source data obtained after error correction decoding, and obtain the second series. Code data.

Since the first encoded data is affected by the channel to be tested during transmission, an error may occur. Therefore, after receiving the first encoded data, the receiving device performs error correction decoding on the first encoded data, so as to find the erroneous bits in the first encoded data in the process of restoring the first encoded data into the source data. The error bit is corrected to obtain error-corrected decoded source data.

In the present application, the source data obtained after error correction decoding is regarded as the correct source data. That is, the present application considers that the source data obtained after error correction decoding is consistent with the source data before the channel coding by the sender device.

Since the first encoded data encoded by the source data is transmitted in the channel to be tested, in order to calculate the error rate, after the error correction decoded source data is obtained in step S204, the error correction decoded is also performed. The source data is channel coded. The channel coding and the error correction decoding are mutually inverse processes. Therefore, the process of coding the channel data of the source data may also be referred to as reverse coding.

In order to distinguish from the first encoded data, the encoded data obtained in this step is referred to as second encoded data. The first encoded data is channel-encoded by the source data and transmitted through the channel to be tested; the second encoded data is channel-encoded by the source data (the correct source data). If the channel to be tested does not have interference and noise, the first encoded data and the second encoded data should be identical.

However, this is not the case. In the transmission process of the channel to be tested, the first coded data may be interfered by the channel to be tested and an erroneous bit may occur. The worse the channel quality of the channel to be tested is, the more error bits appear in the first encoded data, and the better the channel quality of the channel to be tested, the fewer error bits appear in the first encoded data.

Step S205: Calculate a bit error rate of the channel to be tested based on the first encoded data and the second encoded data.

In order to determine the channel quality, the first encoded data and the second encoded data may be compared. Since the second encoded data does not pass through the channel to be tested, it is considered that all bits in the second encoded data are correct.

The first encoded data and the second encoded data are compared to determine the number of erroneous bits in the first encoded data; then, the BER of the number of erroneous bits and the total number of bits of the second encoded data is used to calculate the bit error rate. If the bit error rate is large, the channel quality of the channel to be tested is poor. If the bit error rate is small, the channel quality of the channel to be tested is good.

Step S206: If the error correction decoding of the first encoded data fails, the error rate is set to a preset character.

At present, the receiving sensitivity is generally required to be -118dB to -120dB in the field of digital communication, and the corresponding bit error rate is about 5%. The first encoded data received in this case can be decoded by error correction. If the received first encoded data cannot pass the error correction encoding, the error rate is directly given as a preset character.

The meaning of the preset character is equivalent to the bit error rate exceeding 5%, that is, the wireless signal field strength is equivalent to -120dB. The default character can be represented by NULL, or by MAX, or by other symbols.

Corresponding to the method shown in FIG. 2, the present application further provides a receiver device, which specifically includes:

a first processor, configured to perform an error correction decoding operation on the first encoded data, in the first After the error correction decoding of the encoded data is successful, the source data obtained after the error correction decoding is inversely encoded to obtain the second encoded data, and the channel to be tested is calculated based on the first encoded data and the second encoded data. Bit error rate.

The second implementation: using frame synchronization data to calculate the bit error rate.

As shown in FIG. 3, this embodiment provides a second embodiment of a method for calculating a bit error rate, which specifically includes the following steps:

Step S301: The sender device sends the first encoded data to the receiver device through the channel to be tested. The first encoded data is obtained by channel coding the source data.

The execution process of this step is the same as that of step S201, and details are not described herein again.

Step S302: The receiving device receives the first encoded data, and performs the operation of acquiring the frame synchronization data in the first encoded data; if the frame synchronization data is successfully acquired, the process proceeds to step S303; otherwise, the process proceeds to step S306.

The frame synchronization data is data that the receiving device can distinguish between the start and end of the frame from the received first encoded data. In a time division multiple access system, each frame is 60 ms, divided into two time slots, each frame being a data frame or a voice frame. Each individual data frame is synchronized in the middle, and the middle of the first speech frame of each of the six speech frames is synchronized.

Because the first encoded data received by the receiving device is one frame of source data, or is one slot of source data, the receiving device receiving the first encoded data does not necessarily have frame synchronization data. The receiving device may acquire the frame synchronization data in the first encoded data. If the frame synchronization data can be successfully acquired, the process proceeds to step 303.

Step S303: If the first frame synchronization data is successfully obtained in the first encoded data, the storage office The first frame sync data is described.

For the subsequent description, the frame synchronization data in the first encoded data is referred to as first frame synchronization data. Since the first frame synchronization data exists in the first encoded data, after the first encoded data is transmitted through the channel to be tested, an error may occur in the first frame synchronization data. Therefore, the bit error rate can be calculated based on the first frame sync data.

Step S304: The receiver device determines the second frame synchronization data in the storage space.

Since the frame synchronization data is used for frame synchronization, the sender device and the receiver device have previously agreed on the specific values of the frame synchronization data, for example, 10110000. That is to say: the correct data value of the frame synchronization data is stored in the receiver device. In order to facilitate distinguishing the frame synchronization data stored in the receiver device, it is referred to as second frame synchronization data.

Step S305: Calculate a bit error rate of the channel to be tested based on the first frame synchronization data and the second frame synchronization data.

In order to determine the channel quality, the first frame sync data and the second frame sync data may be compared. Since the second frame sync data does not pass through the channel to be tested, it is considered that all bits in the second frame sync data are correct.

Comparing the first frame synchronization data and the second frame synchronization data to determine the number of error bits in the first frame synchronization data; and then calculating the quotient of the number of errors and the number of bits of the second frame synchronization data Bit error rate. If the bit error rate is large, the channel quality of the channel to be tested is poor. If the bit error rate is small, the channel quality of the channel to be tested is good.

Step S306: If the first frame synchronization data is not successfully obtained in the first encoded data, the error rate is set as a preset character. For details, refer to step S206, and details are not described herein again.

Corresponding to the method shown in FIG. 3, the present application further provides a receiver device, and a specific package. include:

The third implementation manner: calculating the bit error rate by using the data value corresponding to the preset type.

As shown in FIG. 4, this embodiment provides a third embodiment of a method for calculating a bit error rate, which specifically includes the following steps:

Step S401: The sender device sends the first encoded data to the receiver device through the channel to be tested. The first encoded data is obtained by channel coding the source data.

The process of step S401 is the same as the process of step S201, and details are not described herein again.

Step S402: The receiving device receives the first encoded data, and determines whether the data type field can be decoded in the process of performing error correction decoding on the first encoded data. If the data type field is successfully decoded, the process proceeds to step S403. If the data type field is not successfully decoded, the process proceeds to step S407.

A data type field used to indicate the type of source data. The sender device can send multiple types of source data to the receiver device, and one source data has only one data type. A variety of data types include: Boolean types, character types, integer types, IDLE types.

Step S403: determining whether the data type field is a preset type; if it is a preset type, entering Step S404, if it is not a preset type field, it proceeds to step S407.

Among the multiple types sent by the sender, the data content corresponding to some data types is determined. For example, IDLE type, IDLE type indicates idle data, that is, indicates an idle frame. The source data corresponding to the idle frame is predetermined. In the current digital communication system, only the source data corresponding to the IDLE type is determined, and it is not excluded that the subsequent source corresponding to other data types is determined.

Step S404: If the data type field is a preset type, the first data symbol is obtained from the first encoded data.

Since the first encoded data contains content such as data symbols and data type fields, the data symbols are obtained from the first encoded data for subsequent calculation of the bit error rate.

Step S405: The receiver device determines data content corresponding to the preset type, and performs inverse encoding on the data content to obtain a second data symbol.

Since the data content corresponding to the preset type is well-known by the sender device and the receiver device, the receiver device can determine the data content sent by the sender device according to the preset type. The data content is then inversely encoded and represented by the second symbol data for differentiation from the first data symbol.

Step S406: Calculate a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.

To determine channel quality, the first data symbol and the second data symbol can be compared. Since the second data symbol does not pass the channel to be tested, it is considered that all bits in the second data symbol are correct.

Comparing the first data symbol and the second data symbol to determine the first data symbol The number of erroneous bits; then, the BER of the number of erroneous bits and the total number of bits of the second data symbol is used to calculate the bit error rate. If the bit error rate is large, the channel quality of the channel to be tested is poor. If the bit error rate is small, the channel quality of the channel to be tested is good.

Step S407: setting the bit error rate as a preset character. For details, refer to step S206, and details are not described herein again.

Corresponding to the method described in FIG. 4, the present application further provides a receiver device, which specifically includes:

a third processor, in the process of performing error correction decoding on the first encoded data, determining whether the data type field can be decoded, and if the data type field is successfully decoded and the data type field is a preset type, Obtaining a first data symbol in an encoded data, determining a data content corresponding to the preset type, and performing inverse encoding on the data content to obtain a second data symbol, based on the first data symbol and The second data symbol calculates a bit error rate of the channel to be tested.

The fourth implementation manner: an integrated manner of the first implementation manner, the second implementation manner, and the third implementation manner.

As shown in FIG. 5, this embodiment provides a fourth embodiment of a method for calculating a bit error rate, which specifically includes the following steps:

Step S501: The sender device sends the first encoded data to the receiver device through the channel to be tested. The first encoded data is obtained by channel coding the source data.

Step S502: The receiver device receives and stores the first encoded data.

Step S503: The receiving device performs an operation of acquiring a frame synchronization data in the first encoded data.

If the frame synchronization data is successfully acquired, the frame synchronization process is performed; if the frame synchronization data is not successfully acquired, the frame synchronization process is not performed.

Step S504: Perform error correction decoding on the first encoded data, if the error correction decoding is successful, proceed to step S505; if the first encoded data error correction decoding fails, proceed to step S506.

Step S505: Perform reverse coding on the source data obtained after error correction decoding of the first encoded data, obtain second encoded data, and calculate error codes of the channel to be tested based on the first encoded data and the second encoded data. rate.

Step S506: determining whether the first frame synchronization data is successfully acquired in step S503; if yes, proceeding to step S507; if not, proceeding to step S508.

Step S507: If the first frame synchronization data is successfully obtained in the first encoded data, storing the first frame synchronization data, determining the second frame synchronization data in the storage space, and based on the first frame synchronization data and the second Frame synchronization data, calculating the bit error rate of the channel to be tested.

Step S508: determining whether the data type field is error-corrected and decoding successfully; if successful, proceeding to step S509, otherwise proceeding to step S510.

Step S509: If the data type field is a preset type, the first data symbol is obtained from the first encoded data, and the receiver device determines the data content corresponding to the preset type, and reverses the data content. Encoding, obtaining a second data symbol, and calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.

Step S510: setting the error rate to a preset character.

The fifth implementation: obtain the bit error rate through the application interface.

Applicants have found an application interface that calculates a bit error rate in a digital communication system. Application The program interface may be set in the receiver device or on a third party device other than the receiver device and the sender device.

Therefore, after receiving the first encoded data, the receiving device may call an application program interface for calculating a bit error rate, and if the calling process is normal, the error rate is obtained; if an abnormality occurs during the calling process, if the error rate is set to a preset character .

In digital communication systems, source data has two types, data types and voice types. The two types of processing are slightly different, so the application interface for calculating the bit error rate has two: a standard error correction algorithm interface corresponding to the data type, and a codec interface in the vocoder corresponding to the voice type. .

The first implementation to the fifth implementation described above are merely a process of determining a bit error rate. It can be understood that the bit error rate determined according to one source data may be inaccurate. Therefore, the above process of calculating the bit error rate may be performed multiple times to obtain multiple bit error rates of the channel to be tested, and then based on multiple The bit error rate determines the average bit error rate of the channel to be tested, and the average bit error rate is the channel quality of the channel to be tested.

Referring to FIG. 6, a flow chart for determining a channel to be tested based on a plurality of bit error rates.

Step S601: Determine whether a plurality of error rates of the channel to be tested include a preset character. If no, the process proceeds to step S602, and if so, the process proceeds to step S603.

If the bit error rate is a preset character, the bit error rate has no determined value, so special processing is required. Therefore, in the case where there are a plurality of bit error rates, it is first determined whether or not a plurality of bit error rates include a preset character.

Step S602: If the preset error characters are not included in the multiple error rates, the average value of the multiple error rate is determined as the average error rate of the channel to be tested.

If the preset error characters are not included in the multiple bit error rates, the process of averaging is performed directly without special processing.

Step S603: If a plurality of error rates include preset characters, determine whether more than half of the preset characters are included in the plurality of error rates; if yes, proceed to step S604; otherwise, proceed to step S605.

If multiple error codes contain preset characters, special processing is performed. Due to the different number of preset characters, the processing is not the same. First, it is determined whether the preset characters in the plurality of bit error rates exceed more than half.

Step S604: Set the error rate of the channel to be tested to a preset value.

If the multiple error rate includes more than half of the preset characters, the error rate of the channel to be tested is very high, and the error rate of the channel to be tested can be directly set to a preset value. The preset value is a value indicating the maximum value of the channel error rate to be measured.

Step S605: determining whether a plurality of 1/4 or more preset characters are included in the plurality of error rates; if yes, proceeding to step S606; otherwise, proceeding to step S607.

Step S606: Assign each preset character to 5%, and calculate an average value with the error rate of other non-preset characters, and determine the average value as the average bit error rate of the channel to be tested.

The meaning of the preset character is equivalent to the error rate exceeding 5%. If multiple error rates include more than 1/4 of the preset characters, the default characters below 1/2. In this case, the channel to be tested has a certain bit error rate. In order to accurately calculate the error rate of the channel to be tested, the preset character is set to 5%, and then the average of all the bit error rates is calculated, thereby obtaining the average bit error rate of the channel to be tested.

Step S607: If a plurality of BERs do not include more than 1/4 of the preset characters, after excluding each preset character, calculate an average value of the error rate of the other non-preset characters, and determine the average value as The average bit error rate of the channel to be tested.

If more than 1/4 of the preset characters are included in the multiple bit error rate, the quality of the channel to be tested is good, and occasionally one or two preset characters may appear, which may be a special case. Therefore, in this case, the preset character can be excluded, and the remaining bit error rate is directly used to calculate the average bit error rate.

The following steps are described in detail in a specific example:

For example, obtain 10 error rate examples, assuming the default character is NULL.

If the number of NULLs is equal to or exceeds half (that is, the 5 bit error rate values are NULL), then no further calculation is needed, and the bit error rate is directly greater than 5% (bit error rate maximum), and the equivalent field strength is -120 dB. .

If there are 3 to 4 NULL values out of 10 bit error rates, each NULL value is given a 5% bit error rate and averaged with other bit error rates.

If there are 1 to 2 NULL values in the median of the 10 bit error rates, only the average of the other bit error rates is calculated when calculating the bit error rate value.

The functions described in the method of this embodiment are implemented in the form of software functional units and are independent When the product is sold or used, it can be stored in a readable storage medium of a computing device. Based on such understanding, a portion of the embodiments of the present application that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a The computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts of the respective embodiments may be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the application. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the application is not limited to the embodiments shown herein, but is to be accorded the broadest scope of the principles and novel features disclosed herein.

Claims

A method for calculating a bit error rate, comprising:

Receiving and storing first encoded data that is sent by the sending device through the channel to be tested; wherein the first encoded data is obtained by channel encoding the source data;

Performing an error correction decoding operation on the first encoded data;

After the error correction decoding of the first encoded data is successful, the source data obtained after the error correction decoding is inversely encoded to obtain the second encoded data;

Calculating a bit error rate of the channel to be tested based on the first encoded data and the second encoded data.
The method of claim 1 further comprising:

When the error correction decoding of the first encoded data fails, setting the error rate of the channel to be tested is a preset character.
The method of claim 1 further comprising:

When the error correction decoding of the first encoded data fails, it is determined whether the data type field can be decoded;

If the data type field is successfully decoded, and the data type field is a preset type, the first data symbol is obtained from the first encoded data;

Determining data content corresponding to the preset type, and performing inverse encoding on the data content to obtain a second data symbol;

Calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.
The method of claim 3, further comprising:

If the data type field is not successfully decoded, or the decoded data type field is not preset. Type, set the error rate of the channel to be tested as the default character.
The method according to claim 3, further comprising: performing an operation of acquiring a frame synchronization data in the first encoded data before performing an error correction decoding operation on the first encoded data; :

If the error correction decoding of the first encoded data fails, or if the data type field is not successfully decoded, or if the data type field is successfully decoded but the data type field is not a preset type, it is determined whether the first encoded data is successfully obtained. One frame of synchronous data;

If the first frame synchronization data is successfully acquired in the first encoded data, storing the first frame synchronization data;

Determining the second frame synchronization data in the storage space;

And calculating a bit error rate of the channel to be tested based on the first frame synchronization data and the second frame synchronization data.
The method of claim 5, further comprising:

If the first frame synchronization data is not successfully obtained in the first encoded data, setting a bit error rate of the channel to be tested is a preset character.
The method of any of claims 1-6, further comprising:

Calculating multiple error rates of the channel to be tested;

The average error rate of the channel to be tested is determined based on the multiple error rates of the channel to be tested.
The method according to claim 7, wherein the determining the average bit error rate of the channel to be tested based on the plurality of bit error rates of the channel to be tested comprises:

Determining whether multiple error rates of the channel to be tested include preset characters;

If multiple error rates of the channel to be tested do not include preset characters, multiple errors of the channel to be tested The average of the rates is determined as the average bit error rate of the channel to be tested.
The method of claim 8 further comprising:

If the multiple error rate of the channel to be tested includes a preset character, it is determined whether more than half of the preset characters are included in the multiple error rate;

If more than half of the preset characters are included in the multiple bit error rate, the bit error rate of the channel to be tested is set to a preset value.
The method of claim 9 further comprising:

If more than half of the preset characters are not included in the plurality of bit error rates, it is determined whether more than 1/4 of the preset characters are included in the plurality of bit error rates;

If a plurality of BERs include more than 1/4 of the preset characters, each preset character is assigned a value of 5%, and an average value is calculated with the error rate of the other non-preset characters, and the average value is determined as The average bit error rate of the channel to be tested;

If a plurality of BERs do not include more than 1/4 of the preset characters, after the preset characters are excluded, the average value of the error rate of the other non-preset characters is calculated, and the average value is determined as the channel to be tested. The average bit error rate.
A digital communication system, comprising:

a sender device, configured to transmit first encoded data by using a channel to be tested; wherein the first encoded data is obtained by channel coding of the source data;

a receiving device, configured to receive and store the first encoded data, perform an error correction decoding operation on the first encoded data, and obtain a source obtained after error correction decoding after successfully decoding and decoding the first encoded data. The data is inversely encoded to obtain second encoded data; and based on the first encoded data and the second encoded data, a bit error rate of the channel to be tested is calculated.
A method for calculating a bit error rate, comprising:

Receiving first encoded data that is sent by the sending device through the channel to be tested; wherein the first encoded data is obtained by channel encoding the source data;

Performing an operation of acquiring frame synchronization data in the first encoded data;

If the first frame synchronization data is successfully obtained in the first encoded data, storing the first frame synchronization data;

Determining the second frame synchronization data in the storage space;

And calculating a bit error rate of the channel to be tested based on the first frame synchronization data and the second frame synchronization data.
The method of claim 12, further comprising:

If the first frame synchronization data is not successfully obtained in the first encoded data, setting a bit error rate of the channel to be tested is a preset character.
A digital communication system, comprising:

a sender device, configured to transmit first encoded data by using a channel to be tested; wherein the first encoded data is obtained by channel coding of the source data;

a receiving device, configured to receive, by using the first encoded data sent by the sending device by using the channel to be tested, performing an operation of acquiring frame synchronization data in the first encoded data; and successfully obtaining a first frame synchronization in the first encoded data Data, storing the first frame synchronization data; determining second frame synchronization data in the storage space; calculating a bit error rate of the channel to be tested based on the first frame synchronization data and the second frame synchronization data.
A method for calculating a bit error rate, comprising:

Receiving first encoded data that is sent by the sending device through the channel to be tested; wherein the first encoded data is obtained by channel encoding the source data;

In the process of performing error correction decoding on the first encoded data, determining whether the data type field can be decoded;

If the data type field is successfully decoded and the data type field is a preset type, the first data symbol is obtained from the first encoded data;

Determining data content corresponding to the preset type, and performing inverse encoding on the data content to obtain a second data symbol;

Calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.
The method of claim 15 further comprising:

If the data type field is not successfully decoded, or the data type field is not a preset type, the bit error rate is set as a preset character.
A digital communication system, comprising:

a sender device, configured to transmit first encoded data by using a channel to be tested; wherein the first encoded data is obtained by channel coding of the source data;

The receiving device is configured to receive the first encoded data sent by the sending device through the channel to be tested, and perform error correction decoding on the first encoded data to determine whether the data type field can be decoded; if the data is successfully decoded The type field and the data type field are preset types, the first data symbol is obtained from the first encoded data; the data content corresponding to the preset type is determined, and the data content is inversely encoded to obtain the first Two data symbols; based on the first data symbol And the second data symbol, calculating a bit error rate of the channel to be tested.
A receiver device, comprising:

a first communication module, configured to receive first encoded data that is sent by the sending device by using the channel to be tested; where the first encoded data is obtained by channel encoding the source data;

a memory, configured to store first encoded data that is sent by the sending device through the channel to be tested;

a first processor, configured to perform an error correction decoding operation on the first encoded data, and after performing error correction decoding on the first encoded data, performing reverse coding on the source data obtained after error correction decoding to obtain a second Encoding data, based on the first encoded data and the second encoded data, calculating a bit error rate of the channel to be tested.
A receiver device, comprising:

a second communication module, configured to receive first encoded data that is sent by the sending device by using the channel to be tested; where the first encoded data is obtained by channel encoding the source data;

a second processor, configured to perform an operation of acquiring frame synchronization data in the first encoded data, and if the first frame synchronization data is successfully obtained in the first encoded data, storing the first frame synchronization data, and storing The second frame synchronization data is determined in the space; and the error rate of the channel to be tested is calculated based on the first frame synchronization data and the second frame synchronization data.
A receiver device, comprising:

a third communication module, configured to receive first encoded data that is sent by the sending device by using the channel to be tested; where the first encoded data is obtained by channel encoding the source data;

a third processor, in the process of performing error correction decoding on the first encoded data, determining whether the data type field can be decoded, and if the data type field is successfully decoded and the data type field is a preset type, Obtaining a first data symbol in an encoded data, determining the preset type Corresponding data content, and inversely encoding the data content, obtaining a second data symbol, and calculating a bit error rate of the channel to be tested based on the first data symbol and the second data symbol.