CN116208268A - Method, device, equipment and storage medium for testing satellite broadcast receiving equipment - Google Patents
Method, device, equipment and storage medium for testing satellite broadcast receiving equipment Download PDFInfo
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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Abstract
The application discloses a test method, a device, equipment and a storage medium of satellite broadcast receiving equipment, which belong to the technical field of communication equipment test. Splitting the encoded analog broadcast signals based on the preset sequence; splitting the commonly encoded signals, transmitting the split analog broadcast signals from the corresponding signal transmission channels to satellite broadcast receiving equipment, and testing the satellite broadcast receiving equipment. The original multi-signal testing function is not affected. Therefore, the method and the device solve the problem that multichannel coding occupies more LUT resources of a chip.
Description
Technical Field
The present disclosure relates to the field of communications device testing technologies, and in particular, to a method, an apparatus, a device, and a storage medium for testing a satellite broadcast receiving device.
Background
In the prior art, in the process of testing satellite broadcast receiving equipment, a real broadcast signal and a generated analog broadcast signal are required to be used as test signals, so that the influence on a test result caused by uncertainty existing in the process of testing by using only the real satellite signal can be avoided, and therefore, the conventional test equipment is provided with two signal transmission channels for transmitting the real broadcast signal and the analog broadcast signal.
However, due to limited resources of the chip, generating one encoder may occupy a part of LUT (Look-Up Table) resources, especially when using an LDPC (Low Density Parity Check Code ) encoder, which may occupy a large amount of LUT resources, and if signals are independently encoded in two channels, two encoders need to be generated, so that the LUT resources of the chip are insufficient.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
The main purpose of the application is to provide a method, a device, equipment and a storage medium for testing satellite broadcast receiving equipment, which aim to solve the technical problem that multi-channel coding occupies more chip resources.
In order to achieve the above object, the present application provides a method for testing a satellite broadcast receiving apparatus, which is applied to a testing device of the satellite broadcast receiving apparatus, the testing device of the satellite broadcast receiving apparatus including a plurality of signal transmission channels each for transmitting one of a real broadcast signal or an analog broadcast signal and an encoder for encoding the analog broadcast signal;
the method for testing the satellite broadcast receiving equipment comprises the following steps:
if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals, inputting the analog broadcast signals to the encoder according to a preset sequence for encoding;
splitting the encoded analog broadcast signals based on the preset sequence;
and sending the split analog broadcast signals to satellite broadcast receiving equipment from the corresponding signal transmission channels, and testing the satellite broadcast receiving equipment.
In one possible implementation manner of the present application, before the step of inputting the analog broadcast signals to the encoder in a preset sequence for encoding, the method further includes:
When receiving an instruction for generating broadcast signals, determining whether the plurality of signal transmission channels have idle transmission channels which do not need to transmit real broadcast signals;
if so, generating an analog broadcast signal corresponding to the number of idle transmission channels.
In one possible embodiment of the present application, the step of determining whether the plurality of signal transmission channels have an idle transmission channel that does not need to transmit a real broadcast signal includes:
if the instruction for sending the analog broadcast signals is determined to be received, inquiring the number of the real broadcast signals stored in advance;
and if the number of the real broadcast signals is less than the number of the signal transmission channels, determining that idle transmission channels exist.
In a possible embodiment of the present application, after the step of generating an analog broadcast signal corresponding to the number of idle transmission channels, the method further includes:
transmitting the generated analog broadcast signals through the idle transmission channels respectively;
and scrambling the analog broadcast signals in the corresponding idle transmission channels respectively.
In one possible implementation manner of the present application, after the step of querying the number of real broadcast signals stored in advance if it is determined that the instruction for transmitting the analog broadcast signals is received, the method further includes:
Transmitting the real broadcast signals through the signal transmission channels respectively;
and respectively performing spread spectrum processing and modulation processing in the corresponding signal transmission channels, respectively transmitting the signal transmission channels to satellite broadcast receiving equipment, and testing the satellite broadcast receiving equipment.
In a possible implementation manner of the present application, after the step of transmitting the stored real broadcast signals through the signal transmission channels, the method further includes:
and randomly scrambling the real broadcast signals in the corresponding signal transmission channels respectively.
In a possible embodiment of the present application, after the step of splitting the encoded analog broadcast signal based on the preset order, the method further includes:
the split analog broadcast signals are transmitted through corresponding idle transmission channels respectively;
and respectively performing spread spectrum processing and modulation processing on the analog broadcast signals in the corresponding idle transmission channels.
The application also provides a testing device of satellite broadcast receiving equipment, the device includes:
the coding module is used for inputting the analog broadcast signals to the coder according to a preset sequence for coding if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals;
The signal splitting module is used for splitting the analog broadcast signals which are subjected to coding based on the preset sequence;
and the signal transmitting module is used for transmitting the split analog broadcast signals from the corresponding signal transmission channels to satellite broadcast receiving equipment and testing the satellite broadcast receiving equipment.
The present application also provides a test apparatus of a satellite broadcast receiving apparatus, the apparatus comprising: a memory, a processor and a test program of a satellite broadcast receiving device stored on the memory and operable on the processor, the test program of the satellite broadcast receiving device being configured to implement the steps of the method of testing a satellite broadcast receiving device as claimed in any one of the preceding claims.
The present application also provides a storage medium having stored thereon a test program of a satellite broadcast receiving apparatus, which when executed by a processor, implements the steps of the method for testing a satellite broadcast receiving apparatus according to any one of the above.
Compared with the prior art that one encoder occupies a part of LUT (Look-Up-Table) resources, if signals are independently encoded in two channels respectively, two encoders need to be generated, so that the LUT resources of a chip are seriously insufficient. If the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals, inputting the analog broadcast signals to the encoder according to a preset sequence for encoding; it can be understood that at least two analog broadcast signals transmitted through different signal transmission channels are input to the same encoder according to a preset sequence, and the encoding of the analog broadcast signals transmitted by a plurality of signal transmission channels can be completed by adopting one encoder, especially when the used encoder is an LDPC encoder, the occupation of LUT resources of a chip can be reduced to a great extent. Splitting the encoded analog broadcast signals based on the preset sequence; splitting the commonly encoded signals, transmitting the split analog broadcast signals from the corresponding signal transmission channels to satellite broadcast receiving equipment, and testing the satellite broadcast receiving equipment. The original multi-signal testing function is not affected. Therefore, the method and the device solve the problem that multichannel coding occupies more LUT resources of a chip.
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Fig. 1 is a flowchart of a first embodiment of a testing method of a satellite broadcast receiving apparatus according to the present application;
fig. 2 is a logic architecture diagram of a test method of a satellite broadcast receiving apparatus according to a first embodiment of the present application;
fig. 3 is a schematic view of a first scenario of a testing method of a satellite broadcast receiving apparatus according to a first embodiment of the present application;
fig. 4 is a schematic diagram of a second scenario of a testing method of a satellite broadcast receiving apparatus according to the first embodiment of the present application;
fig. 5 is a schematic diagram of a third scenario of a testing method of a satellite broadcast receiving apparatus according to the first embodiment of the present application;
fig. 6 is a schematic diagram of a fourth scenario of a testing method of a satellite broadcast receiving apparatus according to the first embodiment of the present application;
fig. 7 is a schematic structural diagram of a test device of a satellite broadcast receiving device of a hardware operation environment according to an embodiment of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. Although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to separate information of the same type from each other. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein.
Referring to fig. 1, in this embodiment, a testing apparatus applied to a satellite broadcast receiving apparatus includes a plurality of signal transmission channels and an encoder, where each signal transmission channel is used to transmit one of a real broadcast signal and an analog broadcast signal, and the encoder is used to encode the analog broadcast signal;
the method for testing the satellite broadcast receiving equipment comprises the following steps:
step S10: if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals, inputting the analog broadcast signals to the encoder according to a preset sequence for encoding;
step S20: splitting the encoded analog broadcast signals based on the preset sequence;
step S30: and sending the split analog broadcast signals to satellite broadcast receiving equipment from the corresponding signal transmission channels, and testing the satellite broadcast receiving equipment.
As an example, the test method of the satellite broadcast receiving apparatus is applied to the test device of the satellite broadcast receiving apparatus, the test device of the satellite broadcast receiving apparatus is subordinate to the test device of the satellite broadcast receiving apparatus, and the test device of the satellite broadcast receiving apparatus is subordinate to the test system of the satellite broadcast receiving apparatus.
As an example, a broadcast satellite, also known as a broadcast communication satellite, is a communication satellite that directly relays television or sound broadcasts to the public. Satellite broadcasting is to transmit radio broadcasting data from a satellite to a satellite broadcasting receiving device, and in particular, the satellite broadcasting receiving device may be a home receiving terminal, a vehicle receiving terminal, or other portable receiving devices, etc., without being limited in particular.
As an example, in order to ensure that the satellite broadcast receiving device can correctly receive and parse the broadcast signal issued by the broadcast satellite, frequent function and performance tests need to be performed before the satellite broadcast receiving device is put into use, if only real satellite signals are used for testing, uncertainty exists in the types of the signals, the testing on the specific function of the terminal device is affected, and the efficiency is low and the cost is high.
Therefore, the problems can be effectively overcome by simulating the broadcast signals issued by the broadcast satellite to test the specific functions, and related work becomes more portable and efficient. The test device of the existing satellite broadcast receiving equipment is provided with two signal transmission channels, so that the transmission of two types of broadcast signals can be realized. The first is a real broadcast signal stored in advance, wherein the real broadcast signal is a signal issued by a broadcast satellite received by a testing device of satellite broadcast receiving equipment; the second is the generated analog broadcast signal, which can realize the targeted test of the function of the terminal receiving device.
As an example, since the generated analog broadcast signal needs to be subjected to transcoding into a format that can be received by a satellite broadcast receiving apparatus, it is necessary to obtain a corresponding encoder using FPGA (Field Programmable Gate Array ) technology and to construct an encoding circuit by wiring on a chip to realize an encoding function. Because the LDPC encoding process involves a large number of data shifting and operation processes, encoders obtained through FPGA technology occupy excessive LUT resources of a chip, if two encoders are required to be generated based on two signal transmission channels respectively, double LUT resources are required to be occupied, and for LUT resources with limited chips, LUT resources which can be used for realizing other functions are limited.
The LDPC code is a linear block code with a sparse check matrix, so that the LDPC code has good performance approaching Shannon limit, low decoding complexity and flexible structure, and is widely applied to the fields of deep space communication, optical fiber communication, satellite digital video and audio broadcasting and the like. However, the LDPC encoding function occupies a large amount of LUT resources, so if two LDPC encoders are to be generated, the LUT resources of the chip will not be used enough, and the two channels cannot be independently encoded by the LDPC encoder; for example, if xczu7ev-ffvc1156-2-i is used as the chip, the number of LUT resources provided by the chip is 230400, and the number of LUT resources occupied by one LDPC encoder is about 169900, if one encoder is used for each of the two physical channels, the chip resources are severely insufficient.
The present embodiment aims at: at least two analog broadcast signals transmitted through different signal transmission channels are input to the same encoder according to a preset sequence, and encoding of the analog broadcast signals transmitted by a plurality of signal transmission channels can be completed by adopting one encoder, and particularly when the used encoder is an LDPC encoder, occupation of LUT resources of a chip can be reduced to a great extent.
The method comprises the following specific steps:
step S10: if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals, inputting the analog broadcast signals to the encoder according to a preset sequence for encoding;
in this embodiment, as shown in fig. 4, the test device of the satellite broadcast receiving apparatus includes a plurality of signal transmission channels and an encoder, each signal transmission channel is used for transmitting one of a real broadcast signal or an analog broadcast signal, that is, one signal transmission channel may be used for transmitting a real broadcast signal or an analog broadcast signal; the encoder is used for encoding the analog broadcast signals, that is, the one encoder may be used for encoding analog broadcast signals transmitted by one signal transmission channel, and may also be used for encoding analog broadcast signals transmitted by a plurality of signal transmission channels.
As an example, a plurality of signal transmission channels may simultaneously transmit h real broadcast signals and m analog broadcast signals, i.e., corresponding, a total of (h+m) signal transmission channels.
Specifically, h may be 1, and m may be 1; the h may be 2, m may be 5, etc., and is not particularly limited.
As an example, as shown in fig. 3, if the signals transmitted by the plurality of signal transmission channels include at least two analog broadcast signals, that is, if m is greater than or equal to 2, the same encoder is used to encode the m analog broadcast signals.
Specifically, the step of encoding the m analog broadcast signals using the same encoder is to input the analog broadcast signals to the encoder in a preset sequence for encoding.
As an example, the preset sequence may be to sequentially transmit m analog broadcast signals to the same encoder every 1 microsecond, or may be to input m analog broadcast signals to the same encoder every 0.5 microsecond according to the generation sequence of the analog broadcast signals. The encoder encodes the m analog broadcast signals according to the preset sequence.
Specifically, the embodiment adopts a coding module supporting 1/2LDPC coding and 7/8LDPC coding functions, both coding functions conform to coding rules introduced in CCSDS (Consultative Committee for Space Data Systems, international Commission on Council for space data systems) standards, and the two coding functions are integrated in one coding module, so that switching and double-channel sharing of the coding functions can be realized. And selecting according to the data length required to be encoded. When the encoded data length is 1024 bytes, 7/8LDPC encoding is selected, and when the encoded data length is 1032 bytes, 1/2LDPC encoding is selected, and both encoding functions are integrated in the encoding module and support multi-channel sharing. The embodiment will be described in detail taking the 7/8LDPC encoding rule as an example.
In particular, the linear block code is determined by (n, k), where n is the length of the codeword and k is the length of the information sequence. 7/8LDPC encoding, i.e., (8176, 7154) LDPC encoding. Since both current aerospace devices and ground terminals operate and process data at 32-bit computer word lengths, and the (8176, 7156) LDPC codes are not integer multiples of 32, the code lengths are shortened to (8160, 7136). In order to continue using the (8176, 7154) LDPC coding rule of the CCSDS standard, data padding with "0" is required, the LDPC coded check bit data length is 1022, the information bit data length is 7136, since 18 bits of "0" padded in the front end do not participate in coding, 18 bits of "0" are padded in the front end, that is, 18+7136+1022=8176, and after coding, the 18 bits of "0" are removed before outputting valid data. But 7136+1022=8158 is not an integer multiple of 32, so that 2 bits of "0" are filled at the end, that is, 7136+1022+2=8160 is an integer multiple of 32, and these two bits of "0" are output together with valid encoded data, so that encoding can be completed.
As an example, in an encoding module supporting 1/2LDPC encoding and 7/8LDPC encoding functions, two kinds of encoders share: the device comprises a function switch, a coding configuration, a data input interface and a data output interface. The encoding functions are enabled by the function switch, one of which is selected by the encoding configuration. Current devices support transmitting data of 1024 bytes and 1032 bytes in length. Both lengths of data are supplied to the encoding module by the data input interface. Since the data regions of the two lengths of data participating in encoding are different and the frame header is not encoded, the data input from the data input interface is subjected to frame header region identification. The data input interface shared by two coding functions has a bit width of 16 bits, a length (codeword length) of 1024 bytes, a length of a data frame header of 4 bytes, and a length of a data area (information sequence) of 892 bytes, so that the generated coded data has a length of 128 bytes, namely 7/8LDPC coding is adopted. After frame head identification, generating a frame head identification instruction of 2 clock cycles, and after the instruction is finished, sending the data into a 7/8LDPC coding module to start 7/8LDPC coding. Of the data of 1032 bytes in length (codeword length), the data frame header is 8 bytes in length and the data area (information sequence) is 512 bytes in length, so that the encoded data length is 512 bytes, i.e., 1/2LDPC encoding is adopted. After frame head identification, generating a frame head identification instruction of 4 clock cycles, and after the instruction is finished, sending the data into a 1/2LDPC coding module to start 1/2LDPC coding. The bit width of the data output interface shared by the two coding functions is 16 bits, and corresponding coded data is selected to be transmitted to the next module according to coding configuration.
Step S20: splitting the encoded analog broadcast signals based on the preset sequence;
as an example, since the periods of the encoding process are the same, the order of the encoded analog broadcast signals output when encoding is completed is the same as the order of the above-described input to the encoder, which is a standard for splitting.
As an example, as shown in fig. 3, the encoded analog broadcasting signal is split based on the preset order, and the encoded analog broadcasting signal may be corresponding to a signal transmission channel previously used to transmit the analog broadcasting signal.
Step S30: and sending the split analog broadcast signals to satellite broadcast receiving equipment from the corresponding signal transmission channels, and testing the satellite broadcast receiving equipment.
As an example, as shown in fig. 3, the split analog broadcast signal is transmitted from the corresponding signal transmission channel to a satellite broadcast receiving apparatus, which is tested. When the analog broadcast signals are transmitted by the plurality of physical channels, the analog broadcast signals of the plurality of physical channels are combined, encoded by the same encoder and then split, so that the multi-channel encoder is shared.
In this embodiment, the testing device of the satellite broadcast receiving apparatus includes a plurality of signal transmission channels, so that testing of a plurality of analog broadcast signals of multiple channels can be implemented, and testing efficiency is improved. Meanwhile, the test of a plurality of analog broadcast signals can be completed by using only one encoder, so that LUT resources of a chip are saved, and reusability of the encoding function is realized.
Further, based on the first embodiment of the present application, referring to fig. 2, in this embodiment, before the step of inputting the analog broadcast signals to the encoder in a preset order for encoding, the method further includes:
step S40: when receiving an instruction for generating broadcast signals, determining whether the plurality of signal transmission channels have idle transmission channels which do not need to transmit real broadcast signals;
in this embodiment, as shown in fig. 4, the testing apparatus of the satellite broadcast receiving device further includes an interface module and a storage module, where the interface module is configured to receive a real broadcast signal and generate a broadcast signal instruction, and the storage module is configured to store the real broadcast signal.
As an example, as shown in fig. 4, the testing device of the satellite broadcast receiving apparatus further includes a control module, where when receiving a message, the interface module determines a type of the message, and if the message is a control instruction type message, the control module issues a command, and selects a type of a signal to be sent. If the message is a data type message, the storage module extracts the effective data (real broadcast signal) in the message and stores the effective data in the local.
Specifically, the control module issues a command, the type of the signal selected to be sent can be preset, and if the real broadcast signal is stored locally, the real broadcast signal is selected to be sent; or if the real broadcast signals are stored locally, but the number of the real broadcast signals is smaller than the number of the total signal transmission channels, the real broadcast signals and the analog broadcast signals are selected to be transmitted simultaneously, which is not limited in particular.
As an example, when receiving an instruction for generating a broadcast signal, it is determined whether the plurality of signal transmission channels have idle transmission channels that do not need to transmit a real broadcast signal, and if there are no idle transmission channels, an analog broadcast signal is also generated, which may cause problems such as insufficient local storage space.
In this embodiment, the step of determining whether the plurality of signal transmission channels have an idle transmission channel that is not required to transmit a real broadcast signal includes:
step A1: if the instruction for sending the analog broadcast signals is determined to be received, inquiring the number of the real broadcast signals stored in advance;
in this embodiment, the interface module is further configured to receive an instruction to transmit an analog broadcast signal.
As an example, to avoid the occurrence of the absence of idle transmission channels, analog broadcast signals are also generated, which may cause problems such as insufficient local storage space. It is necessary to determine whether an instruction to transmit an analog broadcast signal is received, and if it is determined that the instruction to transmit an analog broadcast signal is received, the number of real broadcast signals stored in advance is queried.
Step A2: and if the number of the real broadcast signals is less than the number of the signal transmission channels, determining that idle transmission channels exist.
As an example, if the number of real broadcast signals is less than the number of signal transmission channels, it is determined that there are idle transmission channels. That is, if the number of locally stored real broadcast signals is less than (h+m), it is determined that there is an idle transmission channel.
Step S50: if so, generating an analog broadcast signal corresponding to the number of idle transmission channels.
As an example, as shown in fig. 4, the test apparatus of the satellite broadcast receiving device further includes a broadcast signal generation module that generates analog broadcast signals corresponding to the number of idle transmission channels if the idle transmission channels exist.
As an example, if there are x real broadcast signals stored locally, there are (h+m-x) idle transmission channels, and (h+m-x) analog broadcast signals are generated.
As an example, the generated analog broadcast signal is identical to the data frame format of the real broadcast signal, and the data frame size is also identical.
Specifically, the data frame length of the generated analog broadcast signal may be 1024 bytes, 1032 bytes, or the like, which is not specifically limited.
As an example, the generated analog broadcast signals may be generated according to functions or performances of the satellite broadcast receiving device, types of the generated analog broadcast signals are different, and the functions and performances of the generated analog broadcast signals are different in a targeted manner, so that the problems of single signal type and the like of the signals tested by only adopting the real broadcast signals can be solved, and the test result is more comprehensive and objective.
In this embodiment, by controlling the signal type of the transmission of the signal transmission channels, the adaptive generation of the maximum number of analog broadcast signals is realized, and under the condition that the number of signal transmission channels is fixed, the test of the specific function or performance of the satellite broadcast receiving device is ensured to the greatest extent. The test result is kept in a more comprehensive state.
Further, based on the first embodiment and the second embodiment in the present application, another embodiment of the present application is provided, in this embodiment, after the step of generating an analog broadcast signal corresponding to the number of idle transmission channels, the method further includes:
step S60: transmitting the generated analog broadcast signals through the idle transmission channels respectively;
as an example, the generated analog broadcast signals are transmitted through the idle transmission channels, respectively, that is, the generated analog broadcast signal 1 is transmitted through the signal transmission channel 1 in the idle state, the generated analog broadcast signal 2 is transmitted through the signal transmission channel 2 in the idle state, and so on.
Step S70: and scrambling the analog broadcast signals in the corresponding idle transmission channels respectively.
As an example, as shown in fig. 4, the test apparatus of the satellite broadcast receiving device further includes a scrambling module, which performs scrambling by using the generated pseudo random sequence to perform modulo-2 addition with the analog broadcast signal (performing modulo-2 addition of one bit of data in the pseudo random sequence with a corresponding bit of data in the analog broadcast signal), so that enough bit transitions are generated for the data to achieve bit synchronization of the receiving terminal. The specific scrambling function may be self-selected and the scrambling parameters may be self-defined.
As an example, the analog broadcast signals are scrambled in the corresponding idle transmission channels, respectively. Through scrambling processing, the interference signals can be randomized, and the occurrence of continuous 0 and continuous 1 is reduced, so that intersymbol interference and jitter are reduced, the anti-interference capability is improved, the clock extraction of satellite broadcast receiving equipment is facilitated, the frequency spectrum of baseband signals is expanded, the encryption effect is achieved, and the authenticity of analog broadcast signals is increased.
As an example, the method further includes the following steps after inputting the scrambled analog broadcast signal to the encoder in a preset order to perform encoding, and splitting the encoded analog broadcast signal based on the preset order.
In this embodiment, after the step of splitting the encoded analog broadcast signal based on the preset order, the method further includes:
step S80: the split analog broadcast signals are transmitted through corresponding idle transmission channels respectively;
step S90: and respectively performing spread spectrum processing and modulation processing on the analog broadcast signals in the corresponding idle transmission channels.
As an example, the split analog broadcast signals are transmitted through the corresponding idle transmission channels, that is, the original analog broadcast signal 1 is transmitted through the signal transmission channel 1, the original analog broadcast signal 2 is transmitted through the signal transmission channel 2, and the like, that is, the original transmission path is not changed.
As an example, as shown in fig. 4, the test apparatus of the satellite broadcast receiving device further includes a spread spectrum module and a modulation module.
As an example, the analog broadcast signal is subjected to spread spectrum processing and modulation processing in the corresponding idle transmission channel, respectively, that is, the analog broadcast signal 1 is subjected to spread spectrum processing and modulation processing in the signal transmission channel 1; the analog broadcast signal 2 is subjected to spread spectrum processing, modulation processing, and the like in the signal transmission channel 2.
As an example, spreading is mainly to improve the interference immunity of analog broadcast signals. The present embodiment employs a CDMA (Code Division Multiple Access ) system, which is a communication system based on a code division technique (spread spectrum technique) and a multiple access technique, which allocates each user with a specific address code. The address codes have mutual quasi orthogonality, so that the address codes can be overlapped in time, space and frequency; information data with a certain signal bandwidth to be transmitted is modulated by a pseudo-random code with a bandwidth far larger than the signal bandwidth, so that the bandwidth of the original data signal is expanded, and then the satellite broadcast receiving equipment performs despreading, thereby enhancing the anti-interference capability.
Specifically, as shown in fig. 5, 4 sets of pseudo-random sequences are first generated, and the polynomials of the pseudo-random sequences, the initial phases, and the lengths can be modified. And after each generation of the pseudo-random sequence with the fixed length n, the pseudo-random sequence value returns to the initial phase to continue the cyclic generation. The I-way corresponds to 2 groups and the Q-way corresponds to 2 groups. The I-path and the Q-path are two types of analog broadcast signals, and specifically, scrambling, spreading and modulation modes for the I-type and the Q-type analog broadcast signals are different.
As an example, 2 sets of pseudo random sequences of the I-channel are subjected to modulo-2 addition according to the bits, a broadcast signal after 1-bit encoding is taken, the broadcast signal after 1-bit encoding and the pseudo random sequences of n-bit are subjected to modulo-2 addition according to the bits, data after n-bit spread spectrum are generated, then the next cycle is started, the next broadcast signal is taken to perform the same operation, the Q-channel is the same as the I-channel, and after the process is executed, the 1-bit broadcast signal is spread into n-bits. It should be noted that the pseudo-random sequence needs to be generated continuously because of the need for subsequent modulation, and the start bits of the pseudo-random sequence and the start bits of the broadcast signal need to be aligned.
As an example, modulation is the conversion of an analog broadcast signal to be transmitted into a signal suitable for transmission by the signal transmission channel.
Specifically, in this embodiment, BPSK (Binary Phase Shift Keying ) modulation is performed on the spread broadcast signal, and as shown in fig. 6, when the serial bit stream in the I-channel broadcast signal is 1, the initial phase of the corresponding BPSK modulated carrier is 0 °; when the serial bit stream is 0, the initial phase of the corresponding BPSK modulated carrier is 180 °; when the serial bit stream in the broadcast signal of the Q paths is 1, the initial phase of the corresponding BPSK modulation carrier wave is 90 degrees; when the serial bit stream is 0, the initial phase of the corresponding BPSK modulated carrier is 270 °. For the satellite broadcast receiving device to be able to receive the QPSK (Quadrature Phase Shift Keying ) constellation map in order to analyze the analog broadcast signal.
As an example, as shown in fig. 4, the test apparatus of the satellite broadcast receiving device includes a driving module: the driving module generates driving signals of the peripheral chips and outputs the driving signals to the corresponding chips through SPI (Serial Peripheral Interface ) interfaces so as to drive the chips to work.
As an example, as shown in fig. 4, the test apparatus of the satellite broadcast receiving device includes a radio frequency module: after the radio frequency module converts the broadcast signal from the intermediate frequency to the radio frequency, the radio frequency module and an antenna connected with a transmitting interface realize wireless transmission to satellite broadcast receiving equipment.
In this embodiment, by scrambling, spreading, modulating, and radio frequency processing the analog broadcast signal, the anti-interference capability of the analog broadcast signal can be improved, and the analog broadcast signal can be smoothly delivered to the satellite broadcast receiving device, so as to implement a test on the satellite broadcast receiving device.
In this embodiment, after the step of querying the number of real broadcast signals stored in advance if it is determined that the instruction to transmit the analog broadcast signal is received, the method further includes:
step S100: transmitting the real broadcast signals through the signal transmission channels respectively;
step S110: and respectively performing spread spectrum processing and modulation processing in the corresponding signal transmission channels, respectively transmitting the signal transmission channels to satellite broadcast receiving equipment, and testing the satellite broadcast receiving equipment.
As an example, if it is determined that the instruction for transmitting the analog broadcast signal is received, the real broadcast signals are transmitted through the signal transmission channels, and the real broadcast signals can be transmitted without encoding, so that the test on the satellite broadcast receiving device can be completed by performing spread spectrum processing and modulation processing in the corresponding signal transmission channels and transmitting the signals from the corresponding signal transmission channels to the satellite broadcast receiving device, respectively.
In this embodiment, after the step of transmitting the stored real broadcast signals through the signal transmission channels, the method further includes:
step S120: and randomly scrambling the real broadcast signals in the corresponding signal transmission channels respectively.
As an example, the actual broadcast signals may be selected to be further scrambled in advance so that the interference resistance of the actual broadcast signals is increased, specifically, the actual broadcast signals are randomly scrambled in the corresponding signal transmission channels, respectively.
In this embodiment, by processing such as scrambling, spreading, modulation, and radio frequency, not only a true broadcast signal but also an analog broadcast signal can be used to test the satellite broadcast receiving device, so as to improve the authenticity of the result of testing the satellite broadcast receiving device and the richness of the test types.
Referring to fig. 7, fig. 7 is a schematic device structure diagram of a hardware running environment according to an embodiment of the present application.
As shown in fig. 7, the test device of the satellite broadcast receiving device may include: a processor 1001, a memory 1005, and a communication bus 1002. The communication bus 1002 is used to enable connected communication between the processor 1001 and the memory 1005.
Optionally, the test device of the satellite broadcast receiving device may further include a user interface, a network interface, a camera, an RF (Radio Frequency) circuit, a sensor, a WiFi module, and the like. The user interface may include a Display, an input sub-module such as a Keyboard (Keyboard), and the optional user interface may also include a standard wired interface, a wireless interface. The network interface may include a standard wired interface, a wireless interface (e.g., WI-FI interface).
It will be appreciated by those skilled in the art that the testing device structure of the satellite broadcast receiving device shown in fig. 7 does not constitute a limitation of the testing device of the satellite broadcast receiving device, and may include more or less components than illustrated, or may combine certain components, or a different arrangement of components.
As shown in fig. 7, a memory 1005 as one storage medium may include therein an operating system, a network communication module, and a test program of the satellite broadcast receiving apparatus. The operating system is a program that manages and controls the test device hardware and software resources of the satellite broadcast receiving device, supporting the test program of the satellite broadcast receiving device and the execution of other software and/or programs. The network communication module is used to implement communication between components inside the memory 1005 and between other hardware and software in the test system of the satellite broadcast receiving apparatus.
In the test apparatus of the satellite broadcast receiving apparatus shown in fig. 7, the processor 1001 is configured to execute a test program of the satellite broadcast receiving apparatus stored in the memory 1005, and implement the steps of the test method of the satellite broadcast receiving apparatus described in any one of the above.
The specific implementation manner of the testing device of the satellite broadcast receiving device is basically the same as each embodiment of the testing method of the satellite broadcast receiving device, and is not repeated here.
The application also provides a testing device of satellite broadcast receiving equipment, the device includes:
the coding module is used for inputting the analog broadcast signals to the coder according to a preset sequence for coding if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals;
the signal splitting module is used for splitting the analog broadcast signals which are subjected to coding based on the preset sequence;
and the signal transmitting module is used for transmitting the split analog broadcast signals from the corresponding signal transmission channels to satellite broadcast receiving equipment and testing the satellite broadcast receiving equipment.
Optionally, in a possible implementation manner of the present application, before the step of inputting the analog broadcast signals to the encoder in a preset sequence for encoding, the apparatus further includes:
The idle transmission channel determining module is used for determining whether the plurality of signal transmission channels exist idle transmission channels which do not need to send real broadcast signals or not when receiving an instruction for generating broadcast signals;
and the analog broadcast signal generation module is used for generating analog broadcast signals corresponding to the number of the idle transmission channels if the analog broadcast signals exist.
Optionally, in one possible embodiment of the present application, the idle transmission channel determining module includes:
a real broadcast signal inquiring unit, configured to inquire the number of real broadcast signals stored in advance if it is determined that the instruction for transmitting the analog broadcast signal is received;
and the idle transmission channel determining unit is used for determining that the idle transmission channel exists if the number of the real broadcast signals is less than the number of the signal transmission channels.
Optionally, in a possible implementation manner of the present application, after the step of generating an analog broadcast signal corresponding to the number of idle transmission channels if the analog broadcast signal exists, the apparatus further includes:
the first analog broadcast signal transmission module is used for transmitting the generated analog broadcast signals through the idle transmission channels respectively;
And the first scrambling processing module is used for scrambling the analog broadcast signals in the corresponding idle transmission channels respectively.
Optionally, in a possible implementation manner of the present application, after the step of querying the number of real broadcast signals stored in advance if it is determined that the instruction to send the analog broadcast signal is received, the apparatus further includes:
the real broadcast signal transmission module is used for respectively transmitting the real broadcast signals through the signal transmission channels;
the first test module is used for performing spread spectrum processing and modulation processing in the corresponding signal transmission channels respectively, and sending the spread spectrum processing and the modulation processing from the corresponding signal transmission channels to the satellite broadcast receiving equipment respectively, and testing the satellite broadcast receiving equipment.
Optionally, in a possible implementation manner of the present application, after the step of transmitting the stored real broadcast signals through the signal transmission channels, the apparatus further includes:
and the second scrambling processing module is used for randomly scrambling the real broadcast signals in the corresponding signal transmission channels respectively.
Optionally, in a possible implementation manner of the present application, after the step of splitting the encoded analog broadcast signal based on the preset sequence, the apparatus further includes:
The first analog broadcast signal transmission module is used for respectively transmitting the split analog broadcast signals through corresponding idle transmission channels;
and the second test module is used for performing spread spectrum processing and modulation processing on the analog broadcast signals in the corresponding idle transmission channels respectively.
The specific implementation manner of the testing device of the satellite broadcast receiving apparatus is basically the same as each embodiment of the testing method of the satellite broadcast receiving apparatus, and is not repeated herein.
The present application also provides a storage medium having stored thereon a test program of a satellite broadcast receiving apparatus, which when executed by a processor, implements the steps of the method for testing a satellite broadcast receiving apparatus according to any one of the above.
The specific implementation manner of the storage medium is basically the same as that of each embodiment of the test of the satellite broadcast receiving device, and is not repeated here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above, including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. A method of testing a satellite broadcast receiving apparatus, characterized by being applied to a testing device of a satellite broadcast receiving apparatus, the testing device of the satellite broadcast receiving apparatus comprising a plurality of signal transmission channels each for transmitting one of a real broadcast signal or an analog broadcast signal and an encoder for encoding the analog broadcast signal;
the method for testing the satellite broadcast receiving equipment comprises the following steps:
if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals, inputting the analog broadcast signals to the encoder according to a preset sequence for encoding;
splitting the encoded analog broadcast signals based on the preset sequence;
and sending the split analog broadcast signals to satellite broadcast receiving equipment from the corresponding signal transmission channels, and testing the satellite broadcast receiving equipment.
2. The method for testing a satellite broadcast receiving apparatus according to claim 1, wherein before the step of inputting the analog broadcast signals to the encoder in a preset order for encoding processing, the method further comprises:
When receiving an instruction for generating broadcast signals, determining whether the plurality of signal transmission channels have idle transmission channels which do not need to transmit real broadcast signals;
if so, generating an analog broadcast signal corresponding to the number of idle transmission channels.
3. The method of testing a satellite broadcast receiving apparatus according to claim 2, wherein the step of determining whether there are idle transmission channels that do not need to transmit a real broadcast signal exists in the plurality of signal transmission channels comprises:
if the instruction for sending the analog broadcast signals is determined to be received, inquiring the number of the real broadcast signals stored in advance;
and if the number of the real broadcast signals is less than the number of the signal transmission channels, determining that idle transmission channels exist.
4. The method of testing a satellite broadcast receiving apparatus according to claim 2, wherein after the step of generating analog broadcast signals corresponding to the number of idle transmission channels if present, the method further comprises:
transmitting the generated analog broadcast signals through the idle transmission channels respectively;
and scrambling the analog broadcast signals in the corresponding idle transmission channels respectively.
5. The method for testing a satellite broadcast receiving apparatus according to claim 3, wherein after the step of querying a number of real broadcast signals stored in advance if it is determined that the instruction to transmit the analog broadcast signal is received, the method further comprises:
transmitting the real broadcast signals through the signal transmission channels respectively;
and respectively performing spread spectrum processing and modulation processing in the corresponding signal transmission channels, respectively transmitting the signal transmission channels to satellite broadcast receiving equipment, and testing the satellite broadcast receiving equipment.
6. The method for testing a satellite broadcast receiving apparatus according to claim 5, wherein after the step of transmitting the stored true broadcast signals through the signal transmission channels, respectively, the method further comprises:
and scrambling the real broadcast signals in the corresponding signal transmission channels respectively.
7. The method for testing a satellite broadcast receiving apparatus according to claim 1, wherein after the step of splitting the encoded analog broadcast signal based on the preset order, the method further comprises:
The split analog broadcast signals are transmitted through corresponding idle transmission channels respectively;
and respectively performing spread spectrum processing and modulation processing on the analog broadcast signals in the corresponding idle transmission channels.
8. A test apparatus for a satellite broadcast receiving device, the apparatus comprising:
the coding module is used for inputting the analog broadcast signals to the coder according to a preset sequence for coding if the signals transmitted by the signal transmission channels comprise at least two analog broadcast signals;
the signal splitting module is used for splitting the analog broadcast signals which are subjected to coding based on the preset sequence;
and the signal transmitting module is used for transmitting the split analog broadcast signals from the corresponding signal transmission channels to satellite broadcast receiving equipment and testing the satellite broadcast receiving equipment.
9. A test apparatus for a satellite broadcast receiving apparatus, the apparatus comprising: a memory, a processor and a test program of a satellite broadcast receiving device stored on the memory and executable on the processor, the test program of the satellite broadcast receiving device being configured to implement the steps of the method of testing a satellite broadcast receiving device according to any one of claims 1 to 7.
10. A storage medium having stored thereon a test program of a satellite broadcast receiving apparatus, which when executed by a processor, implements the steps of the method of testing a satellite broadcast receiving apparatus according to any one of claims 1 to 7.
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