JP2007258858A - Antenna transmission test system, method and program of wireless device, wireless device and antenna transmission test device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the speed of power measurement performed while switching a plurality of antennas. <P>SOLUTION: The antenna transmission test system of a wireless device has a plurality of transmission/reception antennas 301 and 302, and performs transmission/reception while switching to one transmission/reception antenna. The system is equipped with a circuit 201 for switching the plurality of antennas to one transmission/reception antenna, a wireless circuit 202 performing transmission/reception for the switched transmission/reception antenna, a test time control unit 203A for transmitting a transmission wave continuously on the time axis from the plurality of transmission/reception antennas switched sequentially in synchronism with the clock signal of the wireless device during transmission test, a test antenna 103 for receiving the transmission waves transmitted continuously on the time axis from the switched transmission/reception antenna, a tester 102 performing time analysis of the continuous transmission waves on the time axis received by the test antenna, and a test controller 104 for measuring the power of the plurality of transmission/reception antennas by analyzing the transmission wave data subjected to time analysis. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an antenna transmission test system for a radio having a plurality of antennas. In particular, the present invention relates to a radio antenna transmission test system, a method, a program, a radio, and an antenna transmission test apparatus that can shorten a test time.

Conventionally, it is well known that a single radio has a plurality of antennas, and for example, one antenna having the highest electric field level is selected and used.
As an example, in the inspection / shipment process of a radio having two antennas, the radio antenna is tested as follows.
FIG. 6 is a diagram for explaining a transmission test of a radio antenna, which is a premise of the present invention. As shown in this figure (a), the antenna switching control signal H (High) signal is switched to one of the two antennas A, and as shown in this figure (b), the ON / OFF of the radio wave to be transmitted is turned on. Then, the transmission radio wave is measured, and similarly, the L (Low) signal of the antenna switching control signal is switched to the other antenna B, the radio wave to be transmitted is turned ON / OFF, and the transmission radio wave is measured.

In this way, the command for the antenna switching operation of 2 is sent to the radio, and the transmission radio wave ON / OFF is sent one by one, and after switching to each antenna, the antenna test is performed by the procedure of measuring the transmission radio wave. I was going.
However, in the above method, if the time for sending the command, turning the transmission radio wave on or off, and measuring the transmission radio wave is a unit time, the test increases as the number of antennas increases from 2 to 3, 4, and so on. There is a problem that the time increases in proportion to three times the unit time, four times the unit time, etc. for one antenna. For this reason, there exists a subject that it is necessary to shorten test time.

As described above, there are the following conventional techniques for a radio having a plurality of antennas.
Conventionally, an adaptive array radio device receives an output from an array antenna and receives an output from an A / D converter and an A / D converter for converting an analog signal into a digital signal, and performs downsampling. A down-sampling device for performing the processing and an adaptive array processing unit for receiving the output of the synchronization position estimation device and performing the adaptive array processing, and adaptive array processing according to the timing adjustment signal performed on the down-sampling device The least square error signal is output from the unit, and by this, the transmission directivity calibration process of the adaptive array radio can be accurately performed (for example, see Patent Document 1).

However, in Patent Document 1, although an adaptive array radio having a plurality of antennas is calibrated, the speed of power measurement performed by switching the plurality of antennas is not increased.
Conventionally, a radio apparatus using a space diversity system and having a test function amplifies received signals from the first and second antennas in order to enable a distortion characteristic test without using a measuring instrument. First and second receiving units having variable gain amplifiers, a phase detector for detecting a phase difference between the output signals of the first and second receiving units, and first and second in accordance with detection signals of the phase detectors A delay circuit having a phase shift circuit that controls the phase of the output signal of the second receiver, and a combiner that combines the output signals of the first and second receivers whose phases are controlled by the phase shift circuit. The gain control unit has a configuration in which the setting can be changed according to the set value in the delay time according to the distortion width during the test, and the gain control unit configured to control the gain variable amplifier to the gain according to the distortion depth during the test, and the phase shift The position of the circuit according to the distortion frequency during the test There is one and a phase control unit configured to control (for example, see Patent Document 2).

However, in the above-mentioned Patent Document 2, it is possible to test a distortion characteristic without using a measuring instrument with respect to a wireless device that applies a space diversity method and has a test function. It is not intended to speed up the power measurement performed by switching the antenna.
Further, conventionally, in order to provide a communication device that can detect the characteristics of individual operation parts including each radio unit and can perform a predetermined process related to transmission / reception, a plurality of radios provided corresponding to the antennas are provided. A plurality of signal processing units for receiving and assigning signals to any one of the assigned wireless units, and using one of the signal processing units as a reference And assigning one of the radio units to the signal processing unit as a reference, defining a signal processing unit for the inspection target, and setting one of the radio units as the inspection target for the signal processing unit for the inspection target There is an apparatus that performs a loopback inspection by allocating and connecting a reference wireless unit and an inspection target wireless unit (see, for example, Patent Document 3).

However, in Patent Document 3 described above, loopback inspection is performed in a wireless communication device having a plurality of antennas. However, as described above, the speed of power measurement performed by switching a plurality of antennas is not increased.
Conventionally, in order to obtain a wireless communication apparatus capable of selecting an optimum antenna in each communication slot, the directional coupler extracts a part of the received wave from the antenna and outputs it to the detection circuit. Compares the reception levels of the received waves and reports which antenna has the highest reception level to the arithmetic processing unit. The arithmetic processing unit controls the antenna switching unit to select the antenna with the highest reception level. In such a configuration, there is one that performs level comparison and antenna switching operation for each communication slot (see, for example, Patent Document 4).

However, in Patent Document 4 described above, an optimal antenna is selected in a wireless communication device having a plurality of antennas. However, as described above, it is not intended to increase the speed of power measurement performed by switching a plurality of antennas. .
Conventionally, in order to provide a self-diagnosis method and apparatus for a wireless communication device that can easily check the operation of the wireless device main body and the antenna device in a practical state after the installation of the wireless communication device, a plurality of antenna devices are provided. , A wireless communication apparatus accident diagnosis apparatus for use in a TDMA-TDD wireless communication system comprising a plurality of receivers and transmitters, and one connected to one wireless circuit or two transmitter circuits Connection of the antenna device, the transmission unit, and the reception unit during a loopback test in which a predetermined transmission signal transmitted through one antenna is received through a reception unit of another radio circuit connected to the other antenna Some control units perform a loopback test process by changing the combination of the above and a storage process for storing the loopback test result as table data. (E.g., see Patent Document 5).

However, in Patent Document 5 described above, self-diagnosis is performed using a wireless communication device having a plurality of antennas. However, as described above, the speed of power measurement performed by switching a plurality of antennas is not increased.
Also, conventionally, a technique for correcting phase mismatch and amplitude mismatch of a wireless device is provided in order to maintain channel symmetry when communicating with another device using multiple-input multiple output (MIMO) wireless communication, Amplitude and phase mismatch corrections between multiple transmitters and multiple receivers on a device can be performed at baseband using the digital logic of the receiver path, transmitter path, or both paths of that device. The amplitude offset and the phase offset are supplied to the transmitter of the first antenna path of the device and the radio signal is connected from the first antenna of the device to the second antenna path (the signal is sent to the second antenna path). Phase response and amplitude response when converted to lower frequencies by the associated receiver) By constant, it is intended to be determined among the plurality of radio transmitters path and a radio receiver path (e.g., see Patent Document 6).

  However, in Patent Document 6 described above, a radio apparatus having a plurality of antennas corrects the amount of phase and amplitude offset. However, as described above, the speed of power measurement performed by switching a plurality of antennas is increased. is not.

Re-specialized WO2003 / 073649 JP 2002-185412 A JP 2004-356842 A JP 2005-150864 A Japanese Patent Laid-Open No. 10-10774 JP 2005-538666 Gazette

  Accordingly, in view of the above-described problems, the present invention provides a radio antenna transmission test system, method, program, radio, and antenna transmission test apparatus for increasing the speed of power measurement performed by switching a plurality of antennas. Objective.

  In order to solve the above problems, the present invention provides a radio antenna transmission test system that has a plurality of transmission / reception antennas and performs transmission / reception by switching to one transmission / reception antenna. A switching circuit for switching, a wireless circuit for performing transmission / reception with respect to the transmission / reception antenna switched by the switching circuit, and sequentially switching the plurality of transmission / reception antennas in synchronization with a clock signal of the radio device during a transmission test A test switching control unit for controlling the switching circuit and controlling the radio circuit to transmit a transmission wave continuously on the time axis from the switched transmission / reception antenna, and the switched transmission / reception antenna The test antenna that receives the transmission wave transmitted continuously on the time axis from the time, and the time received by the test antenna A tester for time-analyzing a continuous transmission wave, and a test control device for processing the transmission wave data time-analyzed by the tester and measuring the power of radio waves of the plurality of transmitting and receiving antennas. A radio antenna transmission test system is provided.

Furthermore, when the measurement switching control unit repeatedly measures the power of radio waves from a plurality of transmission / reception antennas, a certain OFF period during which no transmission wave is transmitted is provided between the current measurement and the next measurement. .
Furthermore, the present invention provides an antenna transmission test method for a radio having a plurality of antennas and performing transmission / reception by switching to a single antenna, and sequentially transmitting the plurality of antennas in synchronization with a clock signal of the radio at the time of a transmission test. A step of switching, a step of transmitting a transmission wave continuously on the time axis from the switched antenna, a step of receiving a transmission wave continuously transmitted on the time axis from the switched transmission / reception antenna, and a reception And a step of time-analyzing transmission waves continuous on the time axis, and a step of processing time-analyzed transmission wave data to obtain electric power of the plurality of antennas. An antenna transmission test method is provided.

  Further, according to the present invention, in a program for executing an antenna transmission test of a radio having a plurality of antennas and performing transmission / reception by switching to one antenna by a computer, the plurality of the antennas are synchronized with a clock signal of the radio at the time of the transmission test. The procedure to switch the antennas in order, the procedure to transmit the transmission wave continuously on the time axis from the switched antenna, and the transmission wave transmitted continuously on the time axis from the switched transmission / reception antenna A procedure for time analysis of the received transmission wave that is continuous on the time axis, and a procedure for obtaining the power of the radio waves of the plurality of antennas by processing the transmission wave data subjected to the time analysis. Provided is a computer program for executing a radio antenna transmission test using a computer.

  Further, according to the present invention, in a radio having a plurality of transmission / reception antennas and performing transmission / reception by switching to one transmission / reception antenna, the switching circuit switches the plurality of antennas to one transmission / reception antenna, and the switching circuit switches the switching antenna. A radio circuit that performs transmission / reception with respect to the transmission / reception antenna, and controls the switching circuit to sequentially switch the plurality of transmission / reception antennas in synchronization with a clock signal of the radio device during a transmission test, and the radio Controls the circuit, transmits a transmission wave continuously on the time axis from the switched transmission / reception antenna, and receives a transmission wave transmitted continuously on the time axis from the switched transmission / reception antenna on the test antenna And let the tester analyze the time of the transmission wave that was received by the test antenna and continued on the time axis. Processing the signal wave data to provide a radio which is characterized in that a test time of switching control portion for measuring a radio wave power from said plurality of transmitting and receiving antenna in test controller.

Furthermore, the present invention provides a radio antenna transmission test apparatus that has a plurality of transmission / reception antennas and performs transmission / reception by switching to a single transmission / reception antenna, and continues on the time axis from the transmission / reception antenna switched by the radio. A test antenna that receives the transmitted transmission wave, a tester that time-analyzes the transmission wave that is received on the test antenna, and that is time-analyzed by the tester. An antenna transmission test apparatus comprising: a test control apparatus that processes and measures radio wave power of the plurality of transmitting and receiving antennas.
Further, the tester is a spectrum analyzer.

  As described above, according to the present invention, a plurality of antennas are sequentially switched in synchronization with a clock signal of a radio device during a transmission test, and transmission waves are continuously transmitted on the time axis from the switched antennas. Receives a transmission wave continuously transmitted on the time axis from the switched transmission / reception antenna, performs time analysis on the received transmission wave continuously on the time axis, and processes the transmission wave data subjected to time analysis As a result, the transmission power of the transmission waves from each transmitting / receiving antenna can be measured in a lump on the time axis, so the test time can be shortened and the power measurement speeded up. It has become possible.

  By switching between a plurality of transmission / reception antennas in synchronization with the transmission wave ON / OFF and the clock inside the radio, the transmission waves can be turned on and transmission waves can be transmitted from the plurality of transmission / reception antennas per unit time. This is because it becomes possible.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration example of a radio antenna transmission test system according to the present invention. The radio antenna transmission test system 100 shown in this figure operates under program control. As an example, the radio 101 is provided with two transmission / reception antennas 301 and 302, and one of the transmission / reception antennas 301 and 302 has one radio wave. Send and receive.

A switching circuit 201 is connected to the transmission / reception antennas 301 and 302, and the switching circuit 201 switches the transmission / reception antennas 301 and 302 in order to enable transmission / reception of radio waves.
A radio circuit 202 is connected to the switching circuit 201. The radio circuit 202 is shared by the transmission / reception antennas 301 and 302, modulates a transmission wave to the transmission / reception antennas 301 and 302, and receives from the transmission / reception antennas 301 and 302. Demodulate the wave.

  A control circuit 203 is connected to the radio circuit 202 and the switching circuit 201. The control circuit 203 performs overall control of the radio device 101 including the radio circuit 202 and the switching circuit 201, and further includes a test-time switching control unit 203A. The test switching control unit 203A performs transmission / reception ON / OFF control on the radio circuit 202 in synchronization with the clock signal of the clock incorporated in the radio 101 during the antenna transmission test, and controls the switching circuit 201. Controls switching.

In the inspection / shipment process of the wireless device 101, the test control device 104 is connected to the test-time switching control unit 203 A of the control circuit 203, and the test control device 104 is connected to the test antenna 103 via the tester 102.
The test antenna 103 receives a transmission wave from the transmission / reception antenna 301 or 302, and the tester 102 is realized by a spectrum analyzer or the like. The test antenna 103 receives the reception wave received by the test antenna 103, and with respect to the input power of the reception wave Time analysis.

The test control device 104 is realized by a personal computer (hereinafter referred to as a PC) or the like, and instructs the test time switching control unit 203A of the control circuit 203 in the wireless device 101 which is a device under test to perform an antenna transmission test. Based on the time analysis of the power of the received wave of the tester 102, the power of the radio wave transmitted from the transmitting and receiving antennas 301 and 302 is measured.
FIG. 2 is a time chart for explaining a transmission test operation example of the antenna transmission test system in FIG.

As shown in FIG. 4A, a transmission test start signal S0 is output from the test control device 104 to the test time switching control unit 203A of the control circuit 203 in the wireless device 101.
As shown in FIG. 4B, the clock signal S1 is generated by the clock built in the wireless device 101.
As shown in FIG. 4C, when the test switch control unit 203A has a transmission test start signal S0, it generates an antenna switch control signal S2 in synchronization with the clock signal and outputs it to the switch circuit 201.

That is, the antenna switching control signal S2 is set to H (High) at the rising edge of the clock signal, and set to L (Low) at the rising edge of the next clock signal, and this process is repeated.
The switching circuit 201 connects the antenna 301 to the radio circuit 202 when an H signal is input, and connects the antenna 302 to the radio circuit 202 when an L signal is input.
As shown in FIG. 4D, when the test switching control unit 203A receives the transmission test start signal S0, it generates a transmission control signal S3 in synchronization with the antenna switching control signal S2 and outputs it to the radio circuit 202. .

That is, the transmission control signal S3 is set to H at the rising edge of the antenna switching control signal S2, and the transmission control signal S3 is set to L at the rising edge of the next antenna switching control signal S2.
As shown in FIG. 5E, a transmission waveform S4 is output from the radio circuit 202 to the switching circuit 201 in response to the H transmission control signal S3.
That is, when the antenna switching control signal S2 is H, the transmission wave S4 is output from the transmission / reception antenna 301, and when the antenna switching control signal S2 is L, the transmission wave is output from the transmission / reception antenna 302. The

  When the transmission test is repeated, a certain OFF (L) period is required for the transmission waveform S4. After the first transmission test, if there is no next transmission test start signal S0 from the test control device 104, the transmission control signal S3 is held in the OFF (L) period even if the antenna switching control signal S2 rises. . When the transmission waveform S4 is in the OFF (L) period, the transmission wave is not transmitted regardless of which of the transmission / reception antennas 301 and 302 is selected. Thus, the reason for providing the OFF period for transmission is that the trigger is applied at the power level in order to measure the power level of the transmission wave on the tester 102 side. This is for determining the transmitted wave transmitted from and measuring the transmitted wave on the time axis.

As shown in FIG. 5F, since the transmission waveforms received from the transmission / reception antennas 301 and 302 via the test antenna 103 are continuous on the time axis, the tester 102 has a transmission waveform continuous on the time axis. Time analysis.
Note that the test control device 104 processes the transmission waveform data time-analyzed by the tester 102 and measures the radio waves output from the transmitting and receiving antennas 301 and 302.

  FIG. 3 is a diagram for explaining comparison with FIG. As shown in the figure, by providing a series of controlled antenna switching control signals S2, the transmission / reception antennas 301 and 302 can be switched at high speed to transmit radio waves transmitted from the transmission / reception antennas 301 and 302, respectively. At the same time, it is possible to measure the power of radio waves transmitted from each of the transmitting and receiving antennas 301 and 302 on the tester 102 side. The measurement time can be shortened, and a radio wave power measurement test can be performed at high speed.

  FIG. 4 is a block diagram showing a schematic configuration example of a radio antenna transmission test system, which is a modification of FIG. As shown in this figure, the two antennas are expanded to N in comparison with FIG. 1, and the wireless device 101 is provided with a plurality of transmission / reception antennas 301, 302,. One of 302,..., 30N is used for transmission / reception of radio waves. In the radio inspection / shipment process, a transmission test is performed as follows.

FIG. 5 is a time chart for explaining an example of a transmission test operation of the antenna transmission test system of FIG. As shown in this figure, compared with FIG. 2, antenna 301 when antenna switching control signal S21 is H, antenna 302 when antenna switching control signal S22 is H,... Antenna when antenna switching control signal SN is H Assume that 30N is selected and transmitted.
As shown in (f), (e), (d), and (c) of this figure, the antenna switching signals S21, S22,..., S2N are in turn synchronized with the clock signal S1 shown in (b) of this figure. Assume that H.

While the antenna switching signals S21, S22,..., S2N sequentially become H, the transmission control signal S3 becomes H as shown in (g) of this figure, and the transmission waveform S4 becomes as shown in (h) of this figure. The signal is output from the wireless circuit 202 to the switching circuit 201.
As shown in FIG. 5I, in the tester 102, the transmission waveform S5 from the transmission / reception antennas 301, 302,..., 30N received by the test antenna 103 becomes continuous on the time axis and is subjected to time analysis. The test control device 104 processes the transmission waveform data processed by the tester 102 to measure the power of the radio waves transmitted from the transmission / reception antennas 301, 302,..., 30N, and collectively measures in one unit time. It can be carried out, the measurement time can be shortened, and the radio wave measurement test can be performed at high speed.

In the above description, the radio apparatus in general has been described. However, the present invention is applied to all portable radio apparatuses including a mobile phone having a plurality of antennas, a PHS (simple mobile phone), and a PDA (personal digital assistant). Is possible.
Also, in the above description, transmission / reception is performed by switching antennas with a radio device having a plurality of antennas. Similarly, in the antenna transmission test, a transmission wave is output by switching antennas, but without changing the antenna of the radio device. Even when transmission / reception is performed, the present invention can be used when the transmission test is performed by switching the antenna in the antenna transmission test.

It is a block diagram which shows the schematic structural example of the antenna transmission test system of the radio | wireless machine which concerns on this invention. It is a time chart explaining the example of a transmission test operation | movement of the antenna transmission test system in FIG. It is a figure for demonstrating the comparison with FIG. FIG. 9 is a block diagram illustrating a schematic configuration example of a radio antenna transmission test system, which is a modification of FIG. 1. 5 is a time chart for explaining an example of a transmission test operation of the antenna transmission test system of FIG. 4. It is a figure explaining the transmission test of the antenna of the radio | wireless machine used as the premise of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Radio antenna transmission test system 101 ... Radio | wireless machine 102 ... Tester 103 ... Test antenna 301,302, 30N ... Transmission / reception antenna 104 ... Test control apparatus 201 ... Switching circuit 202 ... Radio circuit 203 ... Control circuit 203A ... Test Time switching control unit

Claims (7)

In an antenna transmission test system for a radio that has a plurality of transmission / reception antennas and performs transmission / reception by switching to one transmission / reception antenna,
A switching circuit for switching a plurality of antennas to one transmitting / receiving antenna;
A radio circuit for performing transmission / reception with respect to the transmission / reception antenna switched by the switching circuit;
The switching circuit is controlled so as to sequentially switch the plurality of transmission / reception antennas in synchronization with a clock signal of the radio unit during a transmission test, and the radio circuit is controlled, and a time axis is determined from the switched transmission / reception antennas. A test switching control unit for continuously transmitting a transmission wave on the top;
A test antenna for receiving a transmission wave continuously transmitted on the time axis from the switched transmission / reception antenna;
A tester for time analysis of a continuous transmission wave on the time axis received by the test antenna;
An antenna transmission test system for a radio, comprising: a test control device that processes transmission wave data time-analyzed by the tester and measures radio wave power of the plurality of transmitting and receiving antennas. When the test switching control unit repeatedly measures the power of radio waves from a plurality of transmission / reception antennas, a certain OFF period during which transmission waves are not transmitted is provided between the current measurement and the next measurement. 2. The radio antenna transmission test system according to claim 1, wherein In an antenna transmission test method for a radio device having a plurality of antennas and performing transmission / reception by switching to one antenna,
A step of sequentially switching the plurality of antennas in synchronization with a clock signal of the radio device during a transmission test;
A step of continuously transmitting a transmission wave on the time axis from the switched antenna;
Receiving a transmission wave continuously transmitted on the time axis from the switched transmission / reception antenna;
A step of time-analyzing the received transmission wave continuously on the time axis;
And a step of processing transmission wave data subjected to time analysis to obtain electric power of radio waves of the plurality of antennas. In a program for executing an antenna transmission test of a wireless device that has a plurality of antennas and performs transmission / reception by switching to one antenna on a computer,
A procedure for sequentially switching the plurality of antennas in synchronization with the clock signal of the wireless device during a transmission test,
A procedure for continuously transmitting a transmission wave on the time axis from the switched antenna;
A procedure for receiving a transmission wave continuously transmitted on the time axis from the switched transmission / reception antenna;
A procedure for time analysis of received transmission waves that are continuous on the time axis, and
A program for executing an antenna transmission test of a radio with a computer, comprising: a step of processing transmission wave data subjected to time analysis to obtain power of radio waves of the plurality of antennas. In a radio that has a plurality of transmission / reception antennas and performs transmission / reception by switching to one transmission / reception antenna,
A switching circuit for switching a plurality of antennas to one transmitting / receiving antenna;
A radio circuit for performing transmission / reception with respect to the transmission / reception antenna switched by the switching circuit;
The switching circuit is controlled so as to sequentially switch the plurality of transmission / reception antennas in synchronization with a clock signal of the radio unit during a transmission test, and the radio circuit is controlled, and a time axis is determined from the switched transmission / reception antennas. The transmission wave is continuously transmitted on the time axis, the transmission wave continuously transmitted on the time axis from the switched transmission / reception antenna is received by the test antenna, and is received by the test antenna on the time axis. Test-time switching control for causing the tester to perform time analysis on the continuous transmission waves, processing the transmission wave data time-analyzed by the tester, and measuring the power of the radio waves from the plurality of transmitting and receiving antennas with a test control device And a radio. In an antenna transmission test apparatus for a radio that has a plurality of transmission / reception antennas and performs transmission / reception by switching to one transmission / reception antenna,
A test antenna for receiving a transmission wave continuously transmitted on a time axis from a transmission / reception antenna switched by the wireless device;
A tester for time analysis of a continuous transmission wave on the time axis received by the test antenna;
An antenna transmission test apparatus, comprising: a test control apparatus that processes transmission wave data time-analyzed by the tester and measures electric power of radio waves of the plurality of transmission / reception antennas. The radio antenna transmission test system according to claim 1, wherein the tester is a spectrum analyzer.

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