CN109462460B - Multichannel testing method and device for system with AD9361 chip - Google Patents
Multichannel testing method and device for system with AD9361 chip Download PDFInfo
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- CN109462460B CN109462460B CN201811405718.3A CN201811405718A CN109462460B CN 109462460 B CN109462460 B CN 109462460B CN 201811405718 A CN201811405718 A CN 201811405718A CN 109462460 B CN109462460 B CN 109462460B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a multi-channel test method and a device of a system with an AD9361 chip.A AD9361 module is configured to enter a correction mode, and an orthogonal single tone signal is transmitted by a signal source; transmitting a tone signal by using a transmitting function of an AD9361 module, and simultaneously receiving correction data by using a plurality of AD9361 channels carried by the system; calculating the received data of all channels, entering a verification mode, and transmitting a single carrier signal by a signal source; performing parameter compensation on each channel by using transmitting and receiving verification data of an AD9361 module and using the delay, amplitude and phase value of each channel obtained by calculation; and receiving and observing verification data, and if the corresponding delay, amplitude and phase of the received signals are completely consistent, the testing method is effective. The method provided by the invention has high universality, does not need additional hardware design, and only needs to provide reasonable computing resources; the method provided by the invention is simple and easy to implement, and can meet the use requirements in various scenes.
Description
Technical Field
The invention relates to a channel parameter testing technology in a communication system, in particular to a multi-channel testing method and a multi-channel testing device for a system with an AD9361 chip.
Background
In a communication system, multiple transmit channels or receive channels are usually required to be used simultaneously to improve the system performance, and for this reason, it is necessary to ensure that channel parameters of multiple channels are consistent to ensure the system performance is normal.
At present, an AD9361 chip is commonly used as a transceiver channel of a commercial communication system. In order to ensure the consistency of channel parameters of a plurality of AD9361 channels, precise hardware design and communication protocol design are required to ensure. The method has high implementation difficulty, hardware design difficulty is high, particularly, accurate design is carried out on thousands of channels, the cost and the difficulty are very high, the consistency is difficult to guarantee, meanwhile, the required technical protocol is usually a commercial technical protocol, and the AD9361 has limitation in use and is difficult to popularize in the special communication field such as satellite communication.
The existing multichannel consistency design of a system aiming at an AD9361 chip needs complex and accurate hardware design, the cost is increased sharply along with the increase of the number of channels, a commercial communication technology protocol is often adopted for channel testing aiming at the AD9361 chip in the prior art, the limitation is large, and professional personnel and special test instruments and meters are usually needed for the channel testing of the AD9361 chip in the prior art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to reduce the difficulty to realize the system test of the self-contained AD9361 chip and provides a multi-channel test method and a device of the self-contained AD9361 chip system.
The invention solves the technical problems through the following technical scheme, and the multichannel testing method of the system with the AD9361 chip comprises the following steps:
(1) an AD9361 module is configured, and an IQ correction tracking function of a receiving channel of the AD9361 module is closed;
(2) entering a correction mode, and transmitting an orthogonal single tone signal with sin at path I and cos at path Q by a signal source;
(3) transmitting a tone signal by using a transmitting function of an AD9361 module, and simultaneously receiving correction data by using a plurality of AD9361 channels carried by the system;
(4) calculating the received data of all channels, wherein the data sampled by the ith channel are respectively
Wherein m is the final number of samples;
for the sampling number, sequentially and sequentially sampling N sampling values in a sliding manner, and calculating
Corresponding k where absolute value of | P (k) | is maximum*Value is pairCorresponding to the delay of the channel, | P (k)*) I is the amplitude of the corresponding channel, angle (P (k)*) Is the phase value of the corresponding channel;
(5) then entering a verification mode, and transmitting a single carrier signal with a single carrier in the path I and a single carrier signal with a single carrier in the path Q of 0 by a signal source;
(6) transmitting and receiving authentication data using the AD9361 module;
(7) performing parameter compensation on each channel by using the delay, amplitude and phase value of each channel obtained by calculation;
(8) and receiving and observing verification data, and if the corresponding delay, amplitude and phase of the received signals are completely consistent, the testing method is effective.
In the step (2), the orthogonal single-tone signal adopts 8 times of sampling rate, the number of the single-tone signal points is N, wherein N can be adjusted according to the signal-to-noise ratio received by the system, and the larger N is, the better the calculation performance of the system is.
In the step (3), the receiving is 8 times of the sampling rate.
The testing method is the same for different systems, and the appropriate channel testing method for different systems and different signal-to-noise ratios can be obtained only by adjusting the sampling data N value of the signal source module.
The device for testing by using the multi-channel testing method of the system with the AD9361 chip comprises a signal source module, an AD9361 module, a parameter calculating module, a parameter compensating module and an observing module;
the signal source module generates a single-tone signal for channel correction and a single-carrier signal for verification;
the AD9361 module utilizes an AD9361 chip to realize the signal receiving of the signal source module and sends the signal to the parameter calculation module;
the parameter calculation module is used for calculating the delay, phase and amplitude parameters corresponding to each channel;
the parameter compensation module performs parameter compensation on the verification signal by using the measured delay, phase and amplitude parameters of each channel;
the observation module determines whether the channel correction is successful by observing the verification data of each channel.
Compared with the prior art, the invention has the following advantages: the method provided by the invention has high universality, does not need additional hardware design, and only needs to provide reasonable computing resources; the method provided by the invention has the advantages that the test means are very common, and the AD9361 chip can be supported to be applied to a plurality of special communication fields, including satellite communication and the like; the method provided by the invention is simple and easy to implement, and can meet the use requirements in various scenes.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a system flow diagram of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
As shown in fig. 1, the present embodiment includes a signal source module, an AD9361 module, a parameter calculating module, a parameter compensating module, and an observing module. The signal source module can generate a single tone signal for channel correction and a single carrier signal for verification;
the AD9361 module corresponds to a transceiving channel realized by an AD9361 chip in a general system;
the parameter calculation module is used for calculating the delay, phase and amplitude parameters corresponding to each channel;
the parameter compensation module performs parameter compensation on the verification signal by using the measured delay, phase and amplitude parameters of each channel;
the observation module determines whether the channel correction is successful by observing the verification data of each channel.
As shown in fig. 2, the multi-channel testing method of the present embodiment includes the following steps:
(1) starting a communication system, configuring AD9361 parameters, and closing an IQ correction tracking function of an AD9361 receiving channel;
(2) configuring a signal source module to be in a correction state, transmitting orthogonal single tone signals with sin as a path I and cos as a path Q, and adopting 8 times of sampling rate, wherein the number of the single tone signal points is N, N can be adjusted according to the signal-to-noise ratio received by the system, and the larger N is, the better the calculation performance of the system is;
(3) transmitting a tone signal by using a transmitting function of an AD9361 module, and simultaneously receiving correction data by using a plurality of AD9361 channels of a system, wherein the receiving rate is 8 times of the sampling rate;
(4) and calculating the received data of all channels by using a parameter calculation module. Wherein the data sampled by the ith channel are respectively
Where m is the final number of samples. For the sampling number, sequentially and sequentially sampling N sampling values in a sliding manner, and calculating
Corresponding k where absolute value of | P (k) | is maximum*The value is the delay of the corresponding channel, | P (k)*) L is the amplitude value of the corresponding channel, and angle (P (k)) is the phase value of the corresponding channel;
(5) after the calculation is completed, the signal source module is configured to be in a verification mode, a single carrier signal with a single carrier in the path I and a single carrier signal with a 0 value in the path Q is sent, sampling is carried out at 8 times of speed, and the number of sampling points is N;
(6) sending and receiving verification data by using an AD9361 module;
(7) starting a parameter compensation module, and performing parameter compensation on each channel by using the delay, amplitude and phase value of each channel calculated in the step (4);
(8) and starting the observation module, receiving and observing the verification data after passing through the parameter compensation module, and if the corresponding delay, amplitude and phase of the received signal are completely consistent, indicating that the test method is effective.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A multi-channel test method of a system with an AD9361 chip is characterized by comprising the following steps:
(1) an AD9361 module is configured, and an IQ correction tracking function of a receiving channel of the AD9361 module is closed;
(2) entering a correction mode, and transmitting an orthogonal single tone signal with sin at path I and cos at path Q by a signal source;
(3) transmitting tone signals by using the transmitting function of the AD9361 module, and simultaneously receiving the tone signals by using a plurality of AD9361 channels carried by the system;
(4) calculating the received data of all channels, wherein the data sampled by the ith channel are respectively
Wherein m is the final number of samples;
for the sampling number, sequentially and sequentially sampling N sampling values in a sliding manner, and calculating
Corresponding k where absolute value of | P (k) | is maximum*The value is the delay of the corresponding channel, | P (k)*) I is the amplitude of the corresponding channel, angle (P (k)*) Is the phase value of the corresponding channel;
(5) then entering a verification mode, and transmitting a single carrier signal with a single carrier in the path I and a single carrier signal with a single carrier in the path Q of 0 by a signal source;
(6) transmitting and receiving a single carrier signal by using an AD9361 module;
(7) performing parameter compensation on each channel by using the delay, amplitude and phase value of each channel obtained by calculation;
(8) and receiving and observing verification data, and if the corresponding delay, amplitude and phase of the received signals are completely consistent, the testing method is effective.
2. The method of claim 1, wherein in the step (2), the orthogonal tone signal has a sampling rate 8 times, and the number of the tone signal points is N, where N can be adjusted according to the snr received by the system, and the larger N is, the better the system computation performance is.
3. The method for multi-channel testing of a system with an AD9361 chip as claimed in claim 2, wherein in the step (3), the receiving is 8 times of the sampling rate.
4. An apparatus for testing by using the multi-channel testing method of the system with the AD9361 chip as set forth in claim 1, wherein the system comprises a signal source module, an AD9361 module, a parameter calculating module, a parameter compensating module and an observing module;
the signal source module generates a single-tone signal for channel correction and a single-carrier signal for verification;
the AD9361 module utilizes an AD9361 chip to realize the signal receiving of the signal source module and sends the signal to the parameter calculation module;
the parameter calculation module is used for calculating the delay, phase and amplitude parameters corresponding to each channel;
the parameter compensation module performs parameter compensation on the verification signal by using the measured delay, phase and amplitude parameters of each channel;
the observation module determines whether the channel correction is successful by observing the verification data of each channel.
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