CN1039371C - Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals - Google Patents
Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals Download PDFInfo
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Abstract
The present invention relates to a radio communication device (21) which tests by using radio and optical test signals (RTS and OTS) being simultaneously transmitted by a test transmitter (22). Each test signal carries a data signal of a test digital. The device is provided with radio digital data recovering sections (23-25) which are used for recovering the data signal of the test digital from the radio test signal to be a first digital data signal; an optical digital data recovering section recovers the data signal of the test digital from the optical test signal to be a second digital data signal; comparison sections (48-52) generate bit coincidence signals when corresponding bits between the first and the second digital data signals are mutually coincident; a counter (54) carries out rising count to a count value so as to increase the count value at preset time interval according to the bit coincidence signal; indicators (30-32) indicate the increased count value as the sensitivity of the device.
Description
The present invention relates to radio communications set, this device is used for and the test receiver combination of measuring the sort of radio communications set, to measure the receiver sensitivity of the sort of radio communications set.The invention still further relates to test receiver.Though main the description pointed to radio paging receiver, the sort of radio communications set can be radio paging receiver, transceiver etc.
The radio paging receiver of the above-mentioned type is used for receiving the radiocommunication signals that is delivering the digital data signal of communicating by letter.Radio paging receiver generally includes the radiodigital data recovered part that is used for recovering the communication digital data signal from radiocommunication signals.Be linked to the data processing section on the radiodigital data recovered part, be used for the data-signal after the processing of number of communications digital data signal processing one-tenth.Be linked to the announcement part on the data processing section, be used for carrying out the announcement operation of making an announcement to the people who wears radio paging receiver according to the data-signal after handling.
Above-mentioned similar test receiver generally includes the measuring signal generator that is used for producing the test digital data signal.The testing radio signal emission part emission that is connected on the test generator is delivering the testing radio signal of testing digital data signal.
When the test radio paging receiver, utilize test receiver when measuring the receiver sensitivity of this radio paging receiver and the signal correction of number of communications digital data, make the identifier that the test digital data signal is represented this radio paging receiver special use.
When the testing radio signal had high electric field strength, radio paging receiver can correctly receive the test digital data signal of no error code.In this case, correctly recover the test digital data signal in the testing radio signal of radiodigital data recovered part from radio paging receiver.Data processing section will be tested the data-signal after digital data signal is processed into processing.The announcement part is correctly carried out the announcement operation.
When the testing radio signal had low electric field strength, radio paging receiver may receive the test digital data signal of error code.Because radio paging receiver is the acceptance test digital data signal correctly, in this case, data processing section can not produce the data-signal after the processing.The announcement part can not be carried out the announcement operation.
Usually, the receiver sensitivity of radio paging receiver is defined as the lowest electric field strength that radio paging receiver can be carried out the announcement operation.Because receiver sensitivity (being the lowest electric field strength of testing radio signal) is by judging whether radio paging receiver is carried out the announcement operation and determined, so need make the measuring signal generator of test receiver produce the test digital data signal of the identifier of this radio paging receiver special use of expression.When testing different radio paging receivers, need make measuring signal generator produce the test digital data signal of the different identifiers of expression different radio paging receiver special use.The increase that this causes the energy and time of receiver sensitivity measuring amount is proportional to the increase of radio paging receiver number.
In addition, when the testing radio signal has particular field strength between high electric field strength and low electric field strength, be difficult to know quantitatively correct bit number or wrong bit number in the test digital data signal that testing radio signal that radio paging receiver receives delivered.
Therefore, first purpose of the present invention be to provide a kind of can with the radio communications set of test receiver work in combination, this radio communications set can be measured quantitatively as correct bit number or faultless bit number in the test digital data signal receiver sensitivity of radio communications set, that the testing radio signal is delivered, this testing radio signal is when the testing radio signal has particular field strength, what radio communications set received.
Second purpose of the present invention is to provide the radio communications set of the above-mentioned type, wherein, do not need to make the measuring signal generator of test receiver to produce the test digital data signal of the identifier of this radio communications set special use of expression.
The 3rd purpose of the present invention is to provide the radio communications set of the above-mentioned type, wherein, can reduce the energy and time of the receiver sensitivity measurement of radio communications set.
The 4th purpose of the present invention is to provide the test receiver that is used in combination with radio communications set, this test receiver can be measured quantitatively as correct bit number in the test digital data signal radio communications set receiver sensitivity, that the testing radio signal is delivered, this testing radio signal is when the testing radio signal has particular field strength, what radio communications set received.
The 5th purpose of the present invention is to provide the test receiver of the above-mentioned type, wherein, do not need to make the measuring signal generator of test receiver to produce the test digital data signal of the identifier of this radio communications set special use of expression.
The 6th purpose of the present invention is to provide the test receiver of the above-mentioned type, wherein, can reduce the energy and time that the radio communication device receiver sensitivity is measured.
When the description below carrying out, other purpose of the present invention will become clear.
When describing will the putting of one aspect of the invention, be appreciated that radio communications set is used for receiving the radiocommunication signals that is delivering the digital data signal of communicating by letter and is delivering the testing radio signal of testing digital data signal.Radio communications set comprises the radiodigital Data Recapture Unit, is used for recovering the communication digital data signal and recovers the test digital data signal from radiocommunication signals from the wireless test signal, as first digital data signal.
According to the present invention, a kind of radio communications set and a kind of test receiver that the sensitivity of this radio communications set is tested are provided, wherein said radio communications set is used for receiving the radiocommunication signals that is delivering the digital data signal of communicating by letter, with delivering the testing radio signal of testing digital data signal, and data signal under test is by described test receiver emission, wherein radio communications set comprises: the radiodigital Data Recapture Unit, be used for from radiocommunication signals, recovering described communication digital data signal, and can also from the testing radio signal, recover described test digital data signal, as first digital data signal; Light recovering digital data device is used for recovering described test digital data signal from the optical tests signal, as second digital data signal; Be linked to the commutator pulse generating means on the light recovering digital data device, be used for producing the timing pulse signal synchronous with second digital data signal; Be linked to the comparison means on radio and the described smooth recovering digital data device, be used for first digital data signal is compared by bit with second digital data signal, when first and second digital data signals overlap by bit each other, then produce the bit coincidence impulse continuously; Be linked to first counter on the commutator pulse generating means, be used for from the initial value to the predetermined threshold, carrying out first liter of counting, when first liter of count value reaches threshold value, produce count stop signal according to timing pulse signal; With second counter that is linked on the comparison means and first counter, be used for according to the bit coincidence impulse from initial count value to the count value that has increased, until produce count stop signal, carry out second liter of counting, to produce the count signal of the count value that expression increased, as the receiver sensitivity of described radio communications set and the signal correction of number of communications digital data; Test receiver comprises: the measuring signal generator that is used for producing the test digital data signal; Be linked to the testing radio sender unit on the measuring signal generator, be used for launching and delivering the testing radio signal of testing digital data signal; With the optical tests sender unit that is linked on the radiodigital Data Recapture Unit, be used for launching the optical tests signal that is delivering the digital data signal after receiver recovers.
Fig. 1 is the block diagram of test receiver, base station and radio paging receiver combination according to first embodiment of the invention;
Fig. 2 is the signal format that is used to describe radio paging receiver work shown in Figure 1;
Fig. 3 is the sequential chart that is used to describe radio paging receiver work shown in Figure 1;
Fig. 4 is another sequential chart that is used to describe radio paging receiver work shown in Figure 1;
Fig. 5 is the block diagram according to the second embodiment of the invention radio paging receiver;
Fig. 6 is the block diagram according to the third embodiment of the invention radio paging receiver;
Fig. 7 be according to the fourth embodiment of the invention radio paging receiver with according to the combination block figure of fifth embodiment of the invention test receiver.
With reference to Fig. 1, according to first embodiment of the invention, radio paging system comprises base station 20, radio paging receiver 21, and other radio paging receiver (not shown) that is similar to radio paging receiver 21 in structure and operation.Base station 20 is used for transmitting radio signal of communication (being designated as RCS).Radio paging receiver 21 receives and handles radiocommunication signals RCS.Radio paging receiver 21 is used in combination with test receiver 22, and this test receiver 22 will be described hereinafter.
Turn to Fig. 2, there is shown radiocommunication signals RCS.Shown in radiocommunication signals RCS be the radio signal of POGSAG coding, this signal is set up by No. 584 resolutions of CCIR (Consultative Committee on International Radio (CCIR)).This radiocommunication signals RCS comprises a plurality of frames, and the frame structure of these frames is similar each other.
Each frame of radiocommunication signals RCS is all delivering synchronizing signal SYN and first to q subframe SF1 to SF8, and these subframes are connected in after the synchronizing signal SYN successively, and wherein q represents positive integer.Synchronizing signal SYN has predetermined bit number and is defined as predetermined bit architecture.
Other radio paging receiver of radio paging receiver 21 (Fig. 1) and radio paging system has identifier or the catchword that differs from one another, and can be divided into first to q and organize.First to the q group be assigned to respectively first frame first to q subframe SF1 to SFq.Suppose that radio paging receiver 21 belongs to first group, then base station 20 (Fig. 1) utilize the identifier of first subframe SF1 emission expression radio paging receiver, 21 special uses or catchword catchword signal CN, also the communication information signal CME of the communication information of radio paging receiver 21 is pointed in the emission expression.Wail signal CN and have first to the p bit, wherein P represents the natural number greater than 1.Communication information signal CME has the bit number of preliminary election.Among synchronizing signal SYN, catchword signal CN and the communication information signal CME each all is made of BCH (Bose-Cha Deheli-Huo Ke elder brother sea is female) code.
Synchronizing signal SYN, wail being combined in this and will being called the digital data signal of communicating by letter of signal CN and communication information signal CME.The communication digital data signal is delivered by radiocommunication signals RCS.
Return Fig. 1 and continuation with reference to figure 2, will describe the work of radio paging receiver 21 when paging receiver 21 receives radiocommunication signals RCS below.Radiocommunication signals RCS is received and is delivered on the radio part 24 by antenna 23.Radio part 24 is changed radiocommunication signals RCS or be demodulated to the signal after base band or the demodulation.Be linked to first waveform shaper 25 on the radio part 24, the signal shaping after the demodulation become signal after the shaping of digital waveform.Signal after the shaping has communication digital data signal (being the combination of synchronizing signal SYN, catchword signal CN and communication information signal CME).
So the combination of antenna 23, radio part 24 and first waveform shaper 25 is as radiodigital data-signal recovered part.Radiodigital data recovered part (23,24,25) is used for recovering the communication digital data signal from radiocommunication signals RCS.
The communication digital data signal is delivered on the decoder 26, and decoder 26 detects synchronizing signal SYN, to set up bit synchronous and frame synchronization.After bit synchronous and frame synchronization are set up, first the PROM (programable read only memory), 27 co-operation in decoder 26 and the call number signal that has stored expression radio paging receiver 21 private identification number in advance to the P bit.That is to say that decoder 26 will be wailed signal CN and compare by bit with the call number signal.
When decoder 26 detects each bit of wailing signal CN and overlaps with index signal, decoder 26 is delivered to loudspeaker drive signal on the loud speaker 28 through loudspeaker drive 29, makes loud speaker 28 produce ring tone one period scheduled time, indicating call radio paging receiver 21.Simultaneously, decoder 26 is delivered to communication information signal CME on the signal processor 30.In response to communication information signal CME, signal processor 30 makes the communication information of display unit 31 display communication information signal CME by display driver 32.Display unit 31 for example is a LCD (LCD).
Like this, decoder 26 is used as the data processing section that is linked on the radiodigital data recovered part (23,24,25) with P-ROM27, loudspeaker drive 29, signal processor 30 and display driver 32.Signal (that is, loudspeaker drive signal and communication information signal CME) after data processing section (26,27,29,30,32) becomes to handle with number of communications digital data signal processing.Loud speaker 28 is used as the announcement part that is linked on the data processing section (26,27,29,30,32) with the combination of display unit 31.This announcement part (28,29) is carried out according to the data-signal after handling and is produced the announcement operation of handling the back data-signal.
Turn to Fig. 3, continue referring to Fig. 1, description will be from test receiver 22.Test receiver 22 is used to test radio paging receiver 21.Test receiver 22 is often carried by the engineer that keeps who is responsible for the radio paging system maintenance service.Test receiver 22 is used to launch the testing radio signal RTS of delivery digital data signal.Test receiver 22 also is used for launching optical tests signal OTS.Optical tests signal OTS delivery is similar to the test digital data signal of testing radio signal RTS.
The test digital data signal is shown in first row of Fig. 3.Shown in the test digital data signal comprise logical zero, " 1 ", " 1 ", " 0 ", " 0 ", " 1 " and level "0" continuously.
In Fig. 1, encoder 33 will be tested digital data signal and side by side be added to testing radio signal generator 34 and emission driver 35, to drive the photophore 36 such as LED (light-emitting diode), laser diode etc.
When adding the test digital data signal, testing radio signal generator 34 produces and is delivering the testing radio signal RTS that tests digital data signal.Testing radio signal RTS launches through attenuator 37 and antenna 38.
When adding the test digital data signal, emission driver 35 produces the switching drive signal of representing out respectively and closing when the test digital data signal has logical one and level "0".According to switching drive signal, photophore 36 sends the passage of scintillation light of indication test digital data signal logical one and level "0", because optical tests signal OTS is delivering the test digital data signal.More particularly, optical tests signal OTS is the passage of scintillation light that control of tested person digital data signal or modulation form indication test digital data signal logical one and level "0".
Continuation is described when utilizing test receiver 22 test radio paging receivers 21 work of radio paging receiver 21 with reference to figure 1 and 3.In this case, the service engineer pushes on-state with switch 39, and makes test receiver 22 transmitting radio and optical tests signal RTS and OTS.
Wireless test signal RTS is received and is delivered on the radio part 24 by antenna 23.Radio part 24 is changed testing radio signal RTS or be demodulated to the signal after base band or the demodulation.Signal after the demodulation is shown in second row of Fig. 3.When testing radio signal RTS has high electric field strength, shown in signal after the demodulation by 24 demodulation of radio part.
In Fig. 1, first waveform shaper 25 is by comparing the signal after the demodulation with the intended threshold level that is shown in Fig. 3 second row, the signal shaping after the demodulation become the signal after first shaping of digital waveform.Signal after first shaping is called first digital data signal, is shown in the third line of Fig. 3.When the signal after the demodulation had amplitude greater than threshold level, first digital data signal had high level.When the signal after the demodulation had another amplitude of level of the threshold value of being not more than, first digital data signal had low level.Shown in first digital data signal identical with test digital data signal that encoder 33 produces on waveform.That is to say that radio paging receiver 21 correctly receives the test digital data signal of no error code.But,, between the test digital data signal and first digital data signal, produced time difference or time-delay inevitably owing to the circuit delay of radio part 24, first waveform shaper 25 etc.
Shown in Fig. 3 fourth line, when testing radio signal RTS had low electric field strength, the signal after the demodulation was by wireless portion 24 demodulation.In this case, first waveform shaper 25 produces first digital data signal shown in Fig. 3 fifth line.Shown in first digital data signal comprise logical zero, " 1 ", " 1 ", " 0 ", " 1 ", " 1 " and level "0" continuously.That is to say that radio paging receiver 21 receives the test digital data signal of error code.In the example shown, error code appears on the 5th bit of first digital data signal.
Like this, radiodigital data recovered part (23,24,25) further recovers the test digital data signal from testing radio signal RTS, as first digital data signal.
Optical-electrical converter 40 with optical tests signal OTS convert to after the conversion or demodulation after signal.Signal shaping after being linked to second waveform shaper 41 on the optical-electrical converter 40 and will changing become with test digital data signal second shaping identical, digital waveform after signal.Because optical tests signal OTS and electric field strength are irrelevant, so, can not have error code ground with the test digital data signal and receive optical tests signal OTS.The waveform of the signal after second shaping is identical with signal after the shaping shown in Fig. 3 the third line basically.
In Fig. 1, switch 39 has direct respectively ground connection and connects the negative terminal and the anode of voltage source through resistance 42.This voltage source is designated as+V, and positive voltage is added to anode.Negativing ending grounding voltage.Suppose, just with earth potential corresponding to logical one level and logical zero level.
Turn to Fig. 4, continue referring to Fig. 1, description will be from pushing switch 39 state of connection.As mentioned above, when utilizing test receiver 22 test radio paging receivers 21, the service engineer pushes on-state with switch 39.In this case, ground voltage (being the logical zero level) is added on the reverser 44 through switch 39.Because reverser 44 with the logical one level be added to second with circuit 45 on, then second second reshaping signal that second waveform shaper 41 produces is added on the delay circuit 46 with circuit 45.Delay circuit 46 is to the predetermined time-delay of signal after second shaping of second waveform shaper 41, so that first bit of signal overlaps with first bit of first digital data signal of first waveform shaper, 25 generations after 41 shapings of second waveform shaper.Delay circuit 46 produces the time delayed signal that is called second digital data signal thus.
So, optical-electrical converter 40, second waveform shaper 41, switch 39, voltage source+V, resistance 42, inverter 44, second and the combination of circuit 45 and delay circuit 46 work as light recovering digital data part.(39-42 ,+V 44-46) recover the test digital data signal as second digital data signal from optical tests signal OTS to light recovering digital data part.
In Fig. 4, the test digital data signal that encoder 33 produces is shown in first row.Shown in the test digital data signal first to the 7th bit have logical zero, " 1 ", " 1 ", " 0 ", " 0 ", " 1 " and level "0" respectively.
Shown in Fig. 4 second row, second digital data signal that the delay circuit 46 of light recovering digital data part produces has and the essentially identical waveform of test digital data signal.This is because as mentioned above, can not have error code ground with the test digital data signal and receive optical tests signal OTS.
First digital data signal that first waveform shaper 25 of radiodigital data recovered part (23,24,25) produces is shown in Fig. 4 the third line.Shown in first digital data signal identical with first digital data signal shown in Fig. 3 fifth line, and have the error code that appears at the 5th bit in first digital data signal, as mentioned above.
In Fig. 1, timing pulse generator 47 is linked to light recovering digital data part, and (39-42 ,+V is on the delay circuit 46 44-46).Timing pulse generator 47 produces the timing pulse signal with the second digital data signal bit synchronous.More particularly, timing pulse generator 47 produces first first to N commutator pulse to N bit bit synchronous with second digital data signal continuously, and stack up is as timing pulse signal.Timing pulse signal is shown in Fig. 4 fifth line.
In Fig. 1 and Fig. 4, the 3rd directly is linked on first waveform shaper 25, delay circuit 46 and the timing pulse generator 47 with circuit 48.When the n bit of first and second digital data signals and n commutator pulse overlapped each other, the 3rd produced first coincidence impulse continuously with 48 in circuit, and wherein n changes to N continuously from 1.In this case, when the n bit of the n bit of first digital data signal and second digital data signal has the logical one level jointly, produce each in first coincidence impulse.
When the bit in first and second digital data signals after the n bit reversal and n commutator pulse overlap each other, be linked to first waveform shaper 25 and delay circuit 46, and directly be linked to the 4th on the timing pulse generator 47 and produce second coincidence impulse continuously through reverser 49 and 50 respectively with 51 in circuit.In this case, when the n bit of the n bit of first digital data signal and second digital data signal has the logical zero level jointly, produce each in second coincidence impulse.
Be linked to third and fourth with circuit 48 and 51 on or circuit 52 produce first and second coincidence impulses, as the bit coincidence impulse.In Fig. 4, the bit coincidence impulse is shown in fifth line.
Like this, third and fourth with circuit 48 and 51, reverser 49 and 50 or the combination of circuit 52, as being linked to radiodigital data recovered part (23,24,25) and light recovering digital data partly (39-42,44,45 ,+rating unit on V).Rating unit (48-52) is compared with second digital data signal first digital data signal by bit, when first and second digital data signals overlap by bit each other, then produce the bit coincidence impulse continuously.More particularly, rating unit (48-52) is compared with first of second digital data signal first digital data signal and first to the N bit respectively to the N bit, when the n bit of first and second digital data signals overlaps each other, then produce the bit coincidence impulse continuously, wherein, n changes to N continuously from 1.
In Fig. 1, first counter 53 is linked on the timing pulse generator 47.First counter 53 carries out first liter of counting according to timing pulse signal from the initial value to the predetermined threshold, when first count value reaches threshold value, produce count stop signal.This threshold ratio initial value goes out one second integer M greatly, and M is greater than 1 and be not more than first Integer N.More particularly, first counter 53 carries out first liter of counting according to the part in first to N commutator pulse at least, produces count stop signal when first meter digital increases to threshold value.
Be linked to rating unit (48-52) or the circuit 52 and first counter 53 on second counter 54, according to the bit coincidence impulse from null initial value to the count value that has increased, up to producing count stop signal, carry out second liter of counting, to produce the count signal of the count value that expression increased, as the receiving sensitivity of radio paging receiver 21 with the signal correction of number of communications digital data.More particularly, second counter 54 according to when n from the 1 bit coincidence impulse of generation when N changes continuously, carry out second liter of counting.Second counter 54 produces count signal.
Be linked to the count value that the signal processor 30 on second counter 54 shows display unit 31 to increase in the count signals through display driver 32, as the receiver sensitivity of radio paging receiver 21.Suppose that the second integer M equals 100, then the number of the bit coincidence impulse that produces in the duration that display unit 31 shows corresponding to 100 commutator pulses.In this case, display unit 31 shows when testing radio signal RTS has particular field strength, the percentage of correct number of bits in the test digital data signal that radio signal RTS delivered that radio paging receiver 21 receives.
Like this, the combination of signal processor, display driver 32 and display unit 31 is worked as being linked to the indicating section on second counter 54.The increase that indicating section (30,31,32) indication counter signal is represented count value, as the receiver sensitivity of radio paging receiver 21.
In Fig. 1, radio paging receiver 21 also comprises photophore 55, for example, is linked to lamp on the signal processor 30 through photophore driver 56.When signal processor 30 driven for emitting lights devices 55, photophore 55 illuminates display unit 31 with illumination light.As mentioned above, when switch 39 pushed open position, the output signal of second waveform shaper 41 was through giving signal processor 30 with circuit 43.Because when switch 39 pushed open position, the service engineer did not make test receiver 22 emission optical tests signal OTS, so optical tests signal OTS does not deliver on the optical-electrical converter 40, but the surround lighting of paging receiver 21 is delivered on the optical-electrical converter 40.When environmental light brightness or intensity were low, the output signal of second waveform shaper 41 had the logical one level.When environmental light brightness or intensity were high, the output signal of second waveform shaper 41 had the logical zero level.That is to say that when the environment deepening of radio paging receiver 21, the output signal of second waveform shaper 41 has the logical one level.When signal processor 30 drives display unit 31, when making display unit 31 show the communication information CME (Fig. 2) of decoder 26 recoveries, if signal processor 30 through first output signal of receiving the logical one level from second waveform shaper 41 with circuit 43 (promptly, the environment deepening of radio paging receiver 21, then signal processor 30 driven for emitting lights devices 55 make photophore 55 utilize illumination light to illuminate display unit 31.
Turn to Fig. 5, description will be from the radio paging receiver 60 according to second embodiment of the invention.Radio paging receiver 60 comprises the like that marks with same numeral.This radio paging receiver comprises the mode selector 61 that is used for selecting normal and test job mode.Normal and test mode is indicated by N and T respectively.First is linked on the mode selector 61 to third selector 62,63,64.When mode selector 61 was selected normal mode N, first each all selected normal operation mode N to third selector 62 to 64.When mode selector 61 was selected test mode T, first each all selected test job mode T to third selector 62 to 64.
The mode selector 61 and first combination to third selector 62 to 64 are called mode and select part to be used for selecting normal and test job mode.
Suppose that the service engineer makes mode selector 61 select test mode T, and test receiver 22 transmitting radio and optical tests signal RTS and OTS.In this case, first to third selector 62 to 64 selection test mode T.
At test mode T, timing pulse generator 47 is linked on second waveform shaper 41 of light recovering digital data part (40,41) through the first selector 62 of mode selection portion branch (61-64).As a result, timing pulse generator 47 produce continuously that second waveform shaper with light recovering digital data part (40,41) is 41 that recover, first first to N commutator pulse in second digital data signal to N bit bit synchronous.
At test mode T, second counter 54 is linked on the rating unit 65 through the third selector 64 of mode selection portion branch (61-64).Identical with radio paging receiver 21, second counter 54 carries out second liter of counting, until first counter 53 is according to till when bit coincidence impulse that n produces when 1 changes to N continuously produces count stop signal.Second counter 54 produces the count signal of the count value that expression increased, as the receiver sensitivity of radio paging receiver 60.
At metering system T, be linked on the mode selector 61 and make display unit 31 show the count value that count signals have increased, as the receiver sensitivity of radio paging receiver 60 in response to the signal processor 30 of count signal.
Suppose that mode selector 61 selection normal mode N and radio paging receiver 60 receive radiocommunication signals RCS rather than radio and optical tests signal RTS and OTS.In this case, first to third selector 62 to 64 selection normal mode N.
As mentioned above, the communication digital data signal is delivered by radiocommunication signals RCS, and comprises having the first catchword signal CN (Fig. 2) to the P bit.P-ROM27 produce comprise continuously with the digital data signal of communicating by letter in first first the digital data signal to the special use of P bit to P bit bit synchronous.First of this special digital data-signal is represented the identifier of radio paging receiver 60 special uses to the stack up of P bit.
At normal mode N, timing pulse generator 47 is linked on first waveform shaper 25 of radiodigital data recovered part (23-25) through the first selector 62 of mode selection portion branch (61-64), and is added on the P-ROM27 through signal link 66.As a result, timing pulse generator 47 produce continuously with radiodigital data recovered part (23-25) in first waveform shaper 26 recover, first first to P commutator pulse in the digital data signal of communicating by letter to P bit bit synchronous.
More particularly, radio paging receiver 21 in Fig. 1, and P-ROM27 is storing in the signal of the call number of representing radio paging receiver 60 private identification number first to the P bit.Signal link 66 is linked on timing pulse generator 47 and the P-ROM27, be used for first to P commutator pulse delivered on the P-ROM27, make P-ROM27 produce with first to the call number signal of P commutator pulse bit synchronous first to the P bit, as in the special digital data-signal first to the P bit.
At normal mode N, private counter 67 is linked on the rating unit 65 through the third selector 64 of mode selection portion branch (61-64), and directly is linked on the timing pulse generator 47.According to the digital data signal of communicating by letter in first first to P commutator pulse to P bit bit synchronous, private counter 67 counting is according to the first output coincidence impulse that produces to the P bit in the special digital data-signal.Private counter 67 is the generation coincidence signal thus, and this number coincidence signal is pointed out: first of communication digital data signal is represented the identifier of radio paging receiver 60 special uses to the P bit.
Turn to Fig. 6, description will be from the radio paging receiver 70 of the 3rd implementation column according to the present invention.This radio paging receiver 70 comprises the like that marks with same numeral.
Similar to the radio paging receiver of Fig. 1, switch 39 is in off-state usually, and test is during radio paging receiver 70, and this switch 39 pushes on-state.Switch 39 is corresponding to the mode selector 61 of Fig. 5 and to be similar to the method work of mode selector 61.
In radio paging receiver 70, first of Fig. 5 realizes with logical circuit with following method to third selector 62 to 64 and rating unit 65.With circuit 71,72 and or circuit 73 constitute Fig. 5 first selector 62, and to be similar to the method work of first selector 62 among Fig. 5.Constitute second selector 63 among Fig. 5 with another of circuit 74,75 and another or circuit 76, and to be similar to the method work of second selector 63 among Fig. 5.With third selector 64 in the various combination pie graph 5 of circuit 77 and 78, and to be similar to the method work of third selector 64 among Fig. 5.With circuit 48 and 51, reverser 49 and 50 and or circuit 52 constitute rating unit 65 among Fig. 5, and to be similar to the method work of radio paging receiver 21 among Fig. 1.
Reading circuit 79 is corresponding to the signal link 86 of Fig. 5, and to be similar to the method work of signal link 66 among Fig. 5.Just, reading circuit 79 is linked on timing pulse generator 47 and the P-ROM27, and first to P commutator pulse delivered on the P-ROM27, to read the call number signal first from P-ROM27 to P bit (this call number signal indication and first the identifier) to the radio paging receiver 70 of P commutator pulse bit synchronous, as the special digital data-signal first to the P bit, and on first of special digital data-signal delivered to corresponding with the parts of second selector 63 among Fig. 5 and circuit 74 to the P bit.
In Fig. 6, optical-electrical converter 40 usefulness collector electrodes or emitter are linked to the phototransistor 80 on ground and realize.Collector electrode is linked on voltage source+V through resistance 81.The collector voltage of phototransistor 80 collector electrodes is delivered on second waveform shaper 41.Optical-electrical converter 40 with Fig. 1 in similarly method work.
Turn to Fig. 7, description will be from according to the radio paging receiver 82 of fourth embodiment of the invention with according to the test receiver 83 of fifth embodiment of the invention.Radio paging receiver 82 and test receiver 83 all comprise the like that marks with same numeral.
Like this, the combination of testing radio signal generator 34, attenuator 37 and antenna 38 is as the testing radio signal emission part.Testing radio signal emission part (34,37,38) emission is delivering the testing radio signal RTS that tests digital data signal.
Like this, the combination of photophore driver 35 and photophore 36 can be used as and is linked to the optical tests signal emission part on the radiodigital data recovered part and works.The emission of optical tests signal emission part is delivering the optical tests signal OTS of the digital data signal after receiver recovers.
Delay circuit 46 ' be added with test digital data signal from encoder 33.This delay circuit 46 ' make test digital data signal produces predetermined time-delay, makes that first bit overlaps in the digital data signal after first bit in the test digital data signal of encoder 33 and the transmitter recovery that second waveform shaper 41 produces.Test digital data signal after delay circuit 46 ' generation is delayed time thus.
Like this, encoder 33 and delay circuit 46 ' combination as measuring signal generator.Measuring signal generator (33,46 ') produces the test digital data signal after test digital data signal and the time-delay.
Timing pulse generator 47 be linked to delay circuit 46 ' on, and produce with delay time after the timing pulse signal of test digital data signal bit synchronous.
Be linked to display unit 31 on second counter 54 and show the represented count value that has increased of count signals, as the receiver sensitivity of radio paging receiver 82.
Claims (7)
1. a radio communications set and a kind of test receiver that the sensitivity of this radio communications set is tested, wherein said radio communications set is used for receiving the radiocommunication signals that is delivering the digital data signal of communicating by letter and is delivering the testing radio signal of testing digital data signal, and data signal under test is by described test receiver emission, it is characterized in that:
Described radio communications set comprises:
The radiodigital Data Recapture Unit is used for recovering described communication digital data signal from described radiocommunication signals, and can also recover described test digital data signal from described testing radio signal, as first digital data signal;
Light recovering digital data device is used for recovering described test digital data signal from described optical tests signal, as second digital data signal;
Be linked to the commutator pulse generating means on the described smooth recovering digital data device, be used for producing and the synchronous timing pulse signal of described second digital data signal;
Be linked to the comparison means on described radio and the described smooth recovering digital data device, be used for described first digital data signal is compared by bit with described second digital data signal, whenever described first and described second digital data signal when overlapping by bit each other, then produce the bit coincidence impulse continuously;
Be linked to first counter on the described commutator pulse generating means, be used for from the initial value to the predetermined threshold, carrying out first liter of counting, when described first liter of count value reaches described threshold value, produce count stop signal according to described timing pulse signal; With
Be linked to second counter on described comparison means and described first counter, be used for according to described bit coincidence impulse from initial count value to the count value that has increased, until produce described count stop signal, carry out second liter of counting, to produce the count signal of the described count value that has increased of expression, as the receiver sensitivity of described radio communications set and the signal correction of described number of communications digital data;
Described test receiver comprises:
Be used for producing the measuring signal generator of test digital data signal;
Be linked to the testing radio sender unit on the described measuring signal generator, be used for launching the testing radio signal that is delivering described test digital data signal; With
Be linked to the optical tests sender unit on the described radiodigital Data Recapture Unit, be used for launching the optical tests signal that is delivering the digital data signal after described receiver recovers.
2. radio communications set as claimed in claim 1 and test receiver is characterized in that described radio communications set also comprises:
Be linked to the data processing equipment on the described radiodigital Data Recapture Unit, be used for the signal after the processing of described number of communications digital data signal processing one-tenth; With
Be linked to the means for signalling on the described data processing equipment, be used for announcing the generation of the data-signal after the described processing according to the data-signal after the described processing.
3. radio communications set as claimed in claim 1 and test receiver, it is characterized in that: described test digital data signal comprises first continuously to the N bit, wherein, N represents first integer greater than 1, the described initial value of described threshold ratio goes out one second integer greatly, this second integer is greater than 1 and be not more than described first integer, wherein:
Described commutator pulse generating means be used for producing continuously with described second digital data signal in first first to N commutator pulse to N bit bit synchronous, stack up is as described timing pulse signal;
Described comparison means is used for and will first first compares to the N bit respectively with in described second digital data signal to the N bit in described first digital data signal, when the n bit of described first and second digital data signals overlaps each other, then produce described bit coincidence impulse continuously, wherein, n changes to N continuously from 1;
Described first counter is used for carrying out described first liter of counting according to a part in described first to N commutator pulse at least, when described first count value increases to described threshold value, produces described count stop signal;
Described second counter be used for according to when n from the 1 bit coincidence impulse that when N changes, produces continuously, carry out described second liter of counting, up to the described count stop signal of generation, described second counter produces described count signal.
4. radio communications set as claimed in claim 3 and test receiver is characterized in that: described radio communications set also comprises the mode choice device that is used for selecting normal and test job mode, wherein:
In described test mode, described commutator pulse generating means is linked on the described mode choice device, to produce described first continuously to described N commutator pulse;
In described test mode, described comparison means is linked on the described mode choice device, to first first compare to the N bit respectively with in described second digital data signal to the N bit in described first digital data signal, whenever described first and the n bit of described second digital data signal when overlapping each other, then produce described bit coincidence impulse continuously;
In described test mode, described second counter is linked on the described mode choice device, with according to the bit coincidence impulse that produces when 1 changes to N continuously as n, carries out described second liter of counting, until produce described count stop signal, described second counter produces described count signal.
5. radio communications set as claimed in claim 4 and test receiver is characterized in that: described communication digital data signal comprises first continuously to the P bit, and wherein P represents the natural number greater than 1, and described radio communications set also comprises:
Storing apparatus, be used for producing comprise continuously with the described digital data signal of communicating by letter in first the special digital data-signal to P bit bit synchronous, first represents the identifier of described radio communications set special use to the stack up of P bit in the described special digital data-signal;
Wherein:
In described normal mode, described commutator pulse generating means is linked on described radiodigital Data Recapture Unit and the described storing apparatus, with produce continuously with the described digital data signal of communicating by letter in first first to P commutator pulse to P bit bit synchronous;
In described normal mode, described comparison means is linked on the described storing apparatus, to first first compare to the P bit respectively with in the described special digital data-signal to the P bit in the described communication digital data signal, the P bit overlaps each other in described communication and described special digital data-signal, then produce the output coincidence impulse continuously, wherein, p changes to P continuously from 1;
In described normal mode, described radio communications set comprises the private counter that is linked on described mode choice device and the described comparison means, be used for counting according to first the output coincidence impulse in the special digital data-signal to the generation of P bit, with the generation coincidence signal, this number coincidence signal is pointed out: first of described communication digital data signal is represented described identifier to the P bit.
6. radio communications set as claimed in claim 5 and test receiver is characterized in that described storing apparatus comprises:
Memory, be used for storing number signal of representing described identifier first to the P bit; With
Be linked to the signal bringing device on described commutator pulse generating means and the described memory, be used for being added on the described memory to described P commutator pulse with described first, make described memory produce with described first to the described signal of described P commutator pulse bit synchronous first to the P bit, as described special digital data-signal first to the P bit.
7. radio communications set as claimed in claim 1 and test receiver, it is characterized in that described test digital data signal comprises first continuously to the N bit, wherein, N represents first integer greater than 1, digital data signal after described transmitter recovers comprises first continuously to the N bit, the described initial value of described threshold ratio goes out one second integer greatly, and this second integer is greater than 1 and be not more than described first integer;
Wherein:
Described commutator pulse generating means be used for producing continuously with described second digital data signal in first first to N commutator pulse to N bit bit synchronous, stack up is as described timing pulse signal;
First first compares to the N position respectively with in the described test digital data signal to the N bit in the digital data signal after described comparison means is used for described transmitter recovered, when the digital data signal after described transmitter recovers and the n bit of described test digital data signal overlap each other, then produce described bit coincidence impulse continuously, wherein n changes to N continuously from 1;
Described first counter is used for carrying out described first liter of counting according to the part in described first to N commutator pulse at least, when described first count value increases to described threshold value, produces described count stop signal;
Described second counter be used for according to when n from the 1 bit coincidence impulse that when N changes, produces continuously, carry out described second liter of counting, up to the described count stop signal of generation, described second counter produces described count signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93102102A CN1039371C (en) | 1993-03-01 | 1993-03-01 | Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93102102A CN1039371C (en) | 1993-03-01 | 1993-03-01 | Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1091875A CN1091875A (en) | 1994-09-07 |
| CN1039371C true CN1039371C (en) | 1998-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93102102A Expired - Fee Related CN1039371C (en) | 1993-03-01 | 1993-03-01 | Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals |
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| Country | Link |
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| CN (1) | CN1039371C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457671A (en) * | 2013-07-02 | 2013-12-18 | 青岛海信宽带多媒体技术有限公司 | Method and device for determining sensitivity of light receiver |
-
1993
- 1993-03-01 CN CN93102102A patent/CN1039371C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457671A (en) * | 2013-07-02 | 2013-12-18 | 青岛海信宽带多媒体技术有限公司 | Method and device for determining sensitivity of light receiver |
| CN103457671B (en) * | 2013-07-02 | 2016-04-27 | 青岛海信宽带多媒体技术有限公司 | The defining method of optical receiver sensitivity and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1091875A (en) | 1994-09-07 |
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