CN2357444Y - Wireless fixed table - Google Patents

Abstract

The utility model relates to a multi-user fixed table of a wireless access system, which comprises an antenna feeder, a power supply module, a simulating user interface unit, a main control unit, and a modularized radio frequency unit. The utility model can provide services for multiple users, and is provided with an internal exchanging function. The utility model is formed by that a plurality of users share a plurality of wireless channels, which effectively reduces initial installation cost and operating cost for a user. The utility model can choose a stepping band frequency, which is suitable for a same band type, and is applicable to any aerial signalling mode of a channel associated aerial signalling mode or a common channel aerial signalling mode.

Description

Radio fixed station

The utility model relates to wireless access system, relates more specifically to a kind of terminal equipment---the radio fixed station of wireless access system.

Radio fixed station technology as the wireless access system terminal equipment was known already, the applicant's application number is the technical scheme that discloses a kind of single user radio fixed station in the utility model application of CN 96237984, this scheme comprises modular power supply, radio frequency and control section, and every generic module can use for the user by the same generic module that working frequency range is divided into different class; Control section is provided with the subscriber dialing of edge joint receipts, the signaling receipts/Power Generation Road of each dialing and the circuit that collects the digits are repeatedly transmitted with signaling method in the limit, and the speed that therefore continues is fast, calls out the reliability height; Other is provided with control line, thereby has improved billing accuracy by the reversed polarity order control phone interface circuit feed antipole that the base station issues.But the actual demand situation in wireless access market (rural area, mine etc.) is such: user distribution is more diffusing, but becomes piece to distribute, and internal traffic is bigger, and needs certain external world's contact.Each user's communication must be monopolized a channel in the such scheme, even take on the telephone between the inside, village, also will take valuable Radio Resource, and the telephone charges that has correspondingly also increased the user is used.In addition, also there is following shortcoming in this scheme: each user must install antenna feeder and power supply facilities independently, has improved greatly and has just dressed up this, and strengthened the workload of safeguarding; In adopting the system of channel associated signalling, synchronization has only a physical channel to be operated on the channel in the multichannel of setting, and the speed that continues is slower, also causes called call loss easily.

Therefore, the purpose of this utility model just provides a kind of above-mentioned shortcoming that overcome, and can service is provided and have the inner exchanging function, faster, the more reliable a kind of multi-user fixed station of the speed that continues for a plurality of users.

For achieving the above object, the utility model radio fixed station MSU comprises antenna feeder, radio frequency unit, main control unit, at least one analog subscriber interface unit and power module.Described radio frequency unit one end links to each other with described antenna feeder, and the other end links to each other with described main control unit, finishes the processing and the transfer of aerial signaling, the transmitting-receiving and the transmitting power of control radio frequency, and modulatedemodulate accesses the base band voice signal.Described main control unit also links to each other with described analog subscriber interface unit, finish control to described analog subscriber interface unit and described radio frequency unit, continuing in inner exchanging and the outside of control MSU, receives and store the various data settings to MSU, provide internal user required various signal tones.Described analog subscriber interface unit connects a plurality of users.Described power module provides required various voltage inputs for each unit.

Described radio frequency unit comprise at least one, separate signal processing channel RFCH, be used for receipts/emission signal frequently, be about to speech or signaling-information modulation back emission that described main control unit is sent here, deliver to main control unit after the signal demodulation that system base-station is sent, each described signal processing channel RFCH sends out/when receiving radiofrequency signal with different carrier frequency modulating/demodulatings.

Described main control unit comprises switching network, primary processor, DTMF coding/decoding and signal tone maker, communication controler, variable connector, serial ports controller, the PCM coder, for each module in the described main control unit provides the clock circuit of clock signal, PCM line, and the memory of storing the program of described primary processor, DTMF coding/decoding and signal tone maker and communication controler.Be connected with described switching network, described DTMF coding/decoding and signal tone maker, described PCM encoder and described analog subscriber interface unit on the described PCM line, described switching network is finished the exchange of local internal traffic under the control of described primary processor; Described DTMF coding/decoding and signal tone maker carry out the coding/decoding of dtmf signal, produce the required various signal tones of internal user, and communicate by letter with described primary processor.Described communication controler is communicated by letter with described primary processor, transmitting the data of described analog subscriber interface unit gives described analog subscriber interface unit from the control information of described primary processor for described primary processor and forwarding, the information of reporting relevant described radio frequency unit to described primary processor, and link to each other with described variable connector with described serial ports controller, described analog subscriber interface unit.Described variable connector one end links to each other with described serial ports controller, and the other end links to each other with a plurality of described signal processing channels, certain signal processing channel of gating under the control of described communication controler.The described PCM coder other end links to each other with a plurality of described signal processing channels, when the local user gets an outside line, will after A/D is converted to digital signal, write in the time slot of certain regulation of PCM, and after D/A converts audio signal to, give described radio frequency unit the digital signal in the regulation time slot of PCM from the audio signal of described radio frequency unit.

Be not difficult to find out, compare, the utlity model has following advantage with single user's fixed station: shared several wireless channels of (1) a plurality of users, reduced user's installation fee effectively and used and cost of use; (2) concentrate and to set up antenna feeder, can adopt the low-loss feeder line, reduced system power dissipation, and helped the design on the engineering; (3) owing to be centralized configuration, can select big capacity reserve battery for use, prolong the outage back operating time effectively; (4) band inner exchanging function, the conversation between the inner wire user does not take radio channel resource, has increased power system capacity effectively; (5) adopt modularized design, increase the number of channel and only need carry additionally radio-frequency module (signal processing channel), dilatation is very convenient; (6) can scan a plurality of channels simultaneously, both accelerate the speed of continuing, also improve the reliability that continues effectively.

Existing accompanying drawings embodiment of the present utility model.Description of drawings is as follows:

Fig. 1 is the schematic diagram of explanation the utility model radio fixed station MSU position in wireless access system;

Fig. 2 A is the general structure block diagram of the utility model radio fixed station first embodiment;

Fig. 2 B is the general structure block diagram of the utility model radio fixed station second embodiment

Fig. 3 is the structured flowchart of main control unit shown in Fig. 2 A and Fig. 2 B;

Fig. 4 is the structured flowchart of PCM coder shown in Fig. 3;

Fig. 5 is the internal structure block diagram of radio frequency unit shown in Fig. 2 A and Fig. 2 B;

Fig. 6 is the theory diagram of the internal structure of individual signals treatment channel shown in Fig. 5;

Fig. 7 is the theory diagram of the built-in function of base band signal process circuit shown in the key diagram 6;

Fig. 8 is the structured flowchart of signal transmitting and receiving circuit shown in Fig. 6;

Fig. 9 is the internal structure theory diagram of channel controller shown in Fig. 2 B;

Figure 10 is the structured flowchart of air feedback unit shown in Fig. 2 B.

Fig. 2 A is depicted as first embodiment of the utility model radio fixed station.In this embodiment, the aerial signaling between radio fixed station and the base station adopts channel associated signaling, and the frequency of aerial signal employing different frequency range is received/sent out to radio fixed station, for example can adopt the frequency of 150M/450M frequency range.In first embodiment, radio fixed station comprises antenna part, power unit and host machine part.Antenna part comprises: reception antenna 201 and two transmitting antennas 203; Host machine part comprises: the splitter 202 that links to each other with reception antenna 201, two mixers 204 that link to each other with two transmitting antennas 203 respectively, radio frequency unit 205, main control unit 206, two analog subscriber interface units 207, and the small-sized distributing frame 208 that links to each other with analog subscriber interface unit 207; Power unit comprises power module 209, battery backup 210, alarm indicating module 211.Splitter 202 is a power divider, will be divided into four the tunnel from the radiofrequency signal of reception antenna 201 and give radio frequency unit 205; Mixer 204 is a power combiner, and each mixer is combined into one the tunnel with two-way from the signal of radio frequency unit 205 and gives transmitting antenna 203; Radio frequency unit 205 1 ends link to each other with mixer 202, splitter 204, and the other end links to each other with main control unit 206; Main control unit 206 also links to each other with two analog subscriber interface units 207, and it is the user circuit board of CC04ASL that analog subscriber interface unit 207 adopts the model of Huawei Company, can link to each other with a plurality of users.Power module 209 adopts AC/DC Switching Power Supply and DC/DC translation circuits, for host machine part provide ± 5VDC, 9VDC ,-the voltage input of 24VDC and 75VAC@25Hz; Employing is configured to the battery backup 210 of 24Ah for host machine part provides stand-by power supply, when the 220VAC power supply of input just often, electric power source pair of module battery backup charging; The alarm indicating circuit links to each other with power module, sends alarm signal when power module work undesired (as 220VAC outage, abnormal conditions such as storage battery over-discharge can, output short-circuit); In addition, power module also provides and adds the interface of battery backup 212, the host work time in the time of can prolonging outage.

Fig. 2 B illustrates the radio fixed station general structure of the utility model second embodiment, and the aerial signaling between this radio fixed station and the base station adopts Common Channel Signaling, and the frequency of same frequency range, for example 450M band frequency are adopted in receipts/signalling.Among Fig. 2 B, main control unit 206 connects the command channel of simulation subscriber unit 207 and channel controller 222 by the main and subordinate node serial communication mode, the speech path that connects simulation subscriber unit 207 and channel controller 222 by the PCM time slot, establish switching network in the main control unit 206, to connect the speech path of the arbitrary channel of local user in to local user or local user to channel controller 222.Analog subscriber unit 207 connects main control units 206, finishes interface function and PCM codec functions with analog line, and connects substations by distributing frame 208.Channel controller 222 connects main control unit 206 and radio frequency units 205, finishes functions such as the control of encoding and decoding, radio frequency unit 205 of encoding and decoding, the PCM signal of signaling and detection.Radio frequency unit 205 connecting channel control units 222 and air feedback unit 221, baseband signal (comprising voice signal and MSK signaling-information) frequency modulation is modulated on the radio frequency, carry out power amplification and be sent to air feedback unit 221, radiofrequency signal from air feedback unit 221 becomes baseband signal after demodulation, be sent to channel controller 222.Air feedback unit 221 is finished the power division of the synthetic and received signal of the power of radio frequency transmissions, send radio frequency unit 205.Power module 209 provides the power supply of above-mentioned each construction unit, the power supply power supply when reserve battery 210 is provided at the AC power power down.Be connected backstage personal computer on the main control unit 206 and finish that the data load of main control unit 206 and channel controller 222, program load, ticket extracts and the maintenance test function.

Referring to Fig. 3, this illustrates the structured flowchart of main control unit shown in Fig. 2 A and Fig. 2 B.As seen from the figure: main control unit mainly comprises: switching network 301, primary processor 302, memory (303,305), DTMF coding/decoding and signal tone maker 304, parallel channel 306, communication controler 307, serial ports controller 308, serial port circuit 309, variable connector 310, article two, PCM line, and PCM coder 311 and clock circuit 312.Clock circuit 312 model for the control of 80188 primary processor 302 under for main control unit in other modules clock signal is provided.Switching network 301 models are MT8981, under the control of primary processor 302, finish the exchange of local internal traffic, switching network 301 links to each other with two analog subscriber interface units with two PCM lines (PCM0, PCM1), 32 time slots of PCM0 are used to transmit the voiceband user signal of local internal traffic, and the transmission of voiceband user signal, signal tone and the dtmf signal of outside line takies a plurality of time slots of PCM1.The program and the data of memory 303 storage primary processors 302; it comprises two flash memory (Flash Memory; a slice model is AM29F040 512K; another sheet model is AT29C010 128K) in order to the program of storage primary processor and need the data of power down protection and RAM that a slice model is 628128 128K in order to the variable data of storage host-processor program.DTMF coding/decoding and signal tone maker 304 models are TMS320C52, finish DTMF coding/decoding and signal tone and generate, and be that the 8bit parallel communications is carried out with primary processor 302 in the parallel channel 306 of EPLD7064 by model.The program of memory 305 storage DTMF coding/decodings and signal tone maker 304 and communication controler 307, adopting a slice model is the ROM of 27C256X2.Communication controler 307 models are 89C52, carry out the 8bit parallel communications by parallel channel 306 and primary processor 302, transmit the data of analog subscriber interface unit 207 and backstage PC213 and give the analog subscriber interface unit from the control information of primary processor for primary processor 302 and forwarding; Communication controler 307 is that the serial ports controller 308 of ST16C2552 links to each other with variable connector 310 by model also, variable connector 310 is certain signal processing channel in the gating radio frequency unit 205 (will describe in detail in conjunction with Fig. 4 hereinafter) under the control of communication controler 307, finishes the control of 308 pairs of radio frequency units of communication controler; In addition, communication controler is also communicated by letter with background PC computer 213 by serial ports controller 308, serial port circuit 309 (model is ADM232).PCM coder 311 is in the time slot that will write certain regulation of PCM1 under the clock signal control that clock circuit 312 provides from the audio signal of radio frequency unit 205 after A/D is converted to digital signal (TS8, TS10, TS12, TS14), when the local user gets an outside line, after converting audio signal to, gives D/A radio frequency unit 205 with the digital signal in the regulation time slot of PCM1.

Fig. 4 illustrates the internal structure block diagram of the coder of PCM shown in Fig. 3 311.As shown in the figure, the PCM coder comprise four independently, an end links to each other with signal processing channel 501 (will describe in detail hereinafter), the other end is received the codec CODEC401 on the PCM1, each CODEC is corresponding with a signal processing channel respectively.Clock circuit provides four clock signal TSC0, TSC1, TSC2 and TSC3, give four CODEC respectively, CODEC0 will convert digital signal to from the audio signal of signal treatment channel RFCH0 under the control of TSC0, write the TS8 of PCM1, and convert the digital signal of TS8 to audio signal and give signal processing channel RFCH0; Remaining three CODEC also carries out identical processing, just the time slot difference of the PCM1 of each CODEC correspondence: CODEC1 correspondence TS10, the corresponding TS12 of CODEC2, the corresponding TS14 of CODEC3.

Fig. 5 illustrates the internal structure block diagram of radio frequency unit shown in Fig. 2 A and Fig. 2 B.By this figure as seen, radio frequency unit comprises four independently signal processing channel RFCH501 (0,1,2,3), be used for receipts/emission signal frequently, be about to speech or signaling-information modulation back that described main control unit sends here and send, the radiofrequency signal that system base-station is sent is demodulated to audio signal and delivers to described main control unit.Each signal processing channel 501 1 end links to each other with main control unit 206, and the other end links to each other with splitter 202 and mixer 204.Per two signal processing channels 501 link to each other with a mixer 204, as only adopting a signal processing channel, then without mixer, directly link to each other with transmitting antenna 203.

As shown in Figure 6, signal processing channel shown in Fig. 5 comprises microcontroller 601, base band signal process circuit 602, radiofrequency signal transmission circuit 603 and signaling process circuit 604.When aerial signaling adopts the MPT1327 signaling, signaling process circuit 604 adopts chip FX429A, the signaling frame that microcontroller 601 is sent here is modulated into MSK-Tx, give base band signal process circuit 602, and receive, decoding through radiofrequency signal transmission circuit 603 receive, signaling-information MSK-Rx after 602 demodulation of base band signal process circuit, decoded data is offered microcontroller 601.Microcontroller 501 models are D78P054, communicate by letter with the communication controler 307 of main control unit by variable connector 310, serial ports controller 308 with asynchronous serial port, report the state of this passage to main control unit, accept the configuration of main control unit; And link to each other with signaling receiving and transmission circuit 604, base band signal process circuit 602 and radiofrequency signal transmission circuit 603, from the base band signal process circuit, read the CTCSS signal in the signal that receives, receive and handle the MSK-Rx signaling from signaling process circuit 604, the MSK-Tx signaling that will send is sent to the signaling receiving and transmission circuit and the base band signal process circuit is carried out power supply control PSC; From the radiofrequency signal transmission circuit, read field intensity indication information RSSI in addition and it is carried out phase-locked loop control PLLC and radio-frequency power control RFPC.The base band signal process circuit links to each other with the radiofrequency signal transmission circuit, and in addition, the radiofrequency signal transmission circuit also links to each other with splitter 202 and mixer 204, and the base band signal process circuit also links to each other with PCM coder 311.Need illustrate that when aerial signaling adopted the FSK signaling, signal processing circuit 604 adopted integrated chip MT8888CS, receives the DTMF-Rx from level adjusting circuit 702D (will describe in detail hereinafter), gives microcontroller with decoded data after the decoding; The FSK signaling that need to send is produced by microcontroller, through delivering to the output of level adjusting circuit 701D (see for details in hereinafter) after a low-pass filtering and the attenuation network (not shown), gives radiofrequency signal transmission circuit 603.Can have two kinds of signaling process circuit (not shown)s in the signal processing channel 501 simultaneously, the signaling process circuit that provides a chip selection signal gating and aerial signaling to adapt by microcontroller 601.

As seen from Figure 7, the circuit of base band signal process shown in Fig. 6 602 comprises audio frequency emission path 701, and audio frequency receives path 702, and infrasonic frequency busy-flash signal CTCSS testing circuit 703.Path 701 comprises the preemphasis circuit 701A in order to lifting voice signal VTx medium-high frequency component, raising signal to noise ratio that links to each other successively, the low-pass filter circuit 701B of filtering out-of-band noise, with the MSK signaling MSK-Tx and the synthetic adder 701C of audio signal of need transmission, and level adjusting circuit 701D.

Audio frequency receive path 702 by the out-of-band noise of bandwidth-limited circuit 702A elimination audio frequency (300-3000Hz) to isolate infrasonic frequency busy-flash signal CTCSS, in addition, receive path 702 and comprise that also deaccentuator 702A, amplifying circuit 702C, level adjusting circuit 702D are with demodulated voice signals VRx and signaling-information MSK-Rx or DTMF-Rx.

Need illustrate that voice signal and signaling-information do not exist simultaneously, therefore deliver to/can not crosstalk each other from the signaling-information and the voice signal of the PCM codec 311 in signaling process circuit 604 and the master control borad.

Infrasonic frequency busy-flash signal CTCSS is present in the communication process always, because modulation degree is lower, after buffer circuit 703A output, carries out filtering by high-order lowpass filter circuit 703B and amplifies, and shaping circuit 703C gives microcontroller 701 detections after being shaped to square wave.

Fig. 8 illustrates the transmission circuit 603 of radiofrequency signal shown in Fig. 6 and is divided into reception and emission two parts by function, the receiving unit operation principle is: the radiofrequency signal RF from splitter 202 enters low noise amplifier 802 behind band pass filter 801 filtering out of band signals, further after band pass filter 803 filtering image frequencies, enter first frequency mixer 804 after the amplification, its first local oscillation signal is provided by receive frequency synthesizer 805, behind difference frequency, produce first intermediate-freuqncy signal, this signal carries out narrow-band filtering with filtering second image frequency through bandwidth-limited circuit 807, after this first intermediate-freuqncy signal FIF is amplified into the IF processing unit 808 that model is MX3371 through filtering, obtain audio signal ARx and radio field intensity signal RSSI, audio signal ARx gives base band signal process circuit 802, and the radio field intensity signal RSSI give microcontroller 601.Radiating portion is shown in Fig. 7 the latter half, audio signal ATx and signaling-information through preemphasis and amplitude limit amplification from base band signal process circuit 602 are limited to input signal in the 300-3000Hz through low pass filter 813 in the lump, by voltage controlled oscillator VCO 812 it is modulated on the carrier frequency then, cushioning, be amplified into radio frequency power amplification modules 810 rate of doing works through exciting circuit 811 amplifies, give mixer 204 or directly give transmitting antenna 203 through behind the low pass filter 809 again, radio frequency power amplification modules is that linear amplifier circuit is to guarantee bandwidth of operation.Two phase-locked loop 806 in the present embodiment adopts phase-locked loop integrated package MB1519, accept the control of microcontroller 601 by serial ports, it mainly acts on is that control receive frequency synthesizer 805 and voltage controlled oscillator 812 produce respectively and receive first local oscillation signal and emission carrier signal, and receives feedback signal from frequency synthesizer 805 and voltage controlled oscillator 812 with the FEEDBACK CONTROL of adjustment to the two.

Among Fig. 9, master microprocessor 901 with link to each other from microprocessor 902 and channel control logic module 903, finish control and signaling process function:, on the other hand each channel is controlled and the MSK signaling is handled on the one hand to controlling from microprocessor 902 and communicating by letter.Finish main and subordinate node serial communication function with main control unit 206 from microprocessor 902, and receive the order of master microprocessor 901, finish functions such as time slot allocation to each channel, gain controlling, channel transceiver frequency configuration.Channel control logic module 903 links to each other the control interface of the baseband processing module 905 of realization master microprocessor 901 and each channel on the other hand on the one hand with master microprocessor 901, link to each other from microprocessor 902 with PCM coding/decoding module 904.PCM coding/decoding module 904 is finished functions such as the encoding and decoding, gain controlling, time slot allocation of voice signal.Baseband processing module 905 1 ends link to each other with PCM coding/decoding module 904, the other end is connected on the radio frequency unit 205, mainly finish two big functions, one is the processing of voice signal, as increase the weight of, postemphasis, companding, separate functions such as companding, encryption, deciphering, gain controlling, quiet, amplitude limit, it two is the modulation and demodulation of msk signal, and voice signal and msk signal synthetic with function such as separate.For the down voice signal, speech time slot on the PCM holding wire is decoded into analogue voice signal through the PCM coding-decoding circuit and is sent to baseband signal processing module, synthesize baseband signal with msk signal after treatment in baseband signal processing module inside, after amplifying, buffering is sent to radio frequency unit 205 then, for the uplink baseband signal, baseband signal is after buffering is amplified, at baseband processing module 905 inner demodulation msk signals, be sent to master microprocessor 901 by channel control logic module 904, or carry out being sent to after speech is handled PCM coding/decoding module 904 and be encoded into the PCM signal and be sent to switching network module in the master microprocessor 901.

As a change to structure shown in Figure 9, the microprocessor of a connecting channel control logic module 903 and main control unit 206 can only be set in the channel controller 222, also microprocessor can be set, and share the microprocessor 302 that is arranged in main control unit 206.

As shown in figure 10, air feedback unit comprises power combiner A01, power divider A02 and duplexer A03.The power output signal of power combiner A01 synthesizing multi-path radio frequency unit.Power divider A02 will be assigned to each radio frequency unit from the radiofrequency signal of antenna.Because second embodiment is the radio fixed station with section, the frequency of same frequency range is adopted in receipts/signalling, therefore needs to adopt duplexer A03 to realize the isolation of receiving and transmitting signal.Adopting two slave antennas is in order to reduce the synthetic power loss of bringing of power.

Below describing composition of the present utility model in detail in conjunction with Fig. 1-10, is the course of work of the example simple declaration first embodiment radio fixed station with the aerial signaling for the MSK signaling below:

Caller: DTMF coding/decoding and signal tone maker 304 receive and detect the dtmf signal from analog subscriber interface unit 307, judge whether to be outside line, as are judged as "No", are finished the exchange of local internal traffic by primary processor 302 control switching networks; As be judged as "Yes", 205 scannings of notice radio frequency unit are to have judged whether idle channel, as there is not an idle channel, the notice subscriber's line is busy, if any idle channel, communication controler 307 is by this signal processing channel 501 of variable connector 310 gatings, called number is given the microcontroller 601 of this signal processing channel 501, to be modulated into MSK-Tx from the signaling-information of microcontroller 601 by signaling process circuit 604 and give base band signal process circuit 602, give mixer 204 after handling by radiofrequency signal transmission circuit 603 then, by 203 off-hooks of transmitting antenna etc.), main control unit 206 is notified this customer call failure; If callee's off-hook is replied, certain time slot of 302 of primary processors and the corresponding PCM1 of this signal processing channel (among TS8, TS10, TS12, the TS14 one) is distributed to this user, the PCM coder is finished the contact of radio frequency unit 206 and 307 voice signals of analog subscriber interface unit under the control of corresponding clock signals, thereby realizes local user's wireless access.

Called: as when radio frequency unit 205 detects the signaling-information of sending here with wireless mode, will call out sign indicating number and give main control unit 206, and reply the calling party, and to being exhaled ringing-signal feeding, as being exhaled off-hook, main control unit to distribute the time slot on the PCM1, enters talking state; If do not have in the said process and call out sign indicating number, call out invalid, caller no response when replying the calling party, all re-execute said process, arrive and unmanned off-hook as the ring time limit, then discharge channel, re-execute said process.

Though more than describe the utility model radio fixed station in conjunction with the embodiments in detail; but obvious protection range of the present utility model is not limited to this; the professional person of this area also may make all conspicuous changes, and therefore, protection range of the present utility model is determined by claims.

Claims (20)

1, a kind of radio fixed station, comprise antenna feeder (201,203), link to each other, finish the radio frequency unit (205) that radiofrequency signal is received and dispatched with described antenna feeder, can it is characterized in that with multi-user's analog subscriber interface unit (207) with for each described unit provides the power module (209) of required various voltages inputs: also comprise with described radio frequency unit (205) linking to each other, control the main control unit (206) that continues in described fixed station inner exchanging and outside.

2, radio fixed station as claimed in claim 1 is characterized in that: described antenna feeder comprises reception antenna (201) and transmitting antenna (203).

3, radio fixed station as claimed in claim 2 is characterized in that: also comprise an end and described antenna feeder (201,203) links to each other, the other end links to each other with described radio frequency unit (205) splitter (202) and mixer (204).

4, radio fixed station as claimed in claim 2 is characterized in that: comprise that also an end links to each other with described main control unit (206), the channel controller (222) that the other end links to each other with described radio frequency unit (205).

5, radio fixed station as claimed in claim 4, it is characterized in that described channel controller (222), comprise: channel control logic module (903), PCM coding/decoding module (904), and baseband processing module (905), described PCM coding/decoding module (904) one ends link to each other with described channel control logic module (903), and the other end links to each other with described baseband processing module 905, and described baseband processing module (905) links to each other with described radio frequency unit (205).

6, radio fixed station as claimed in claim 5, the described channel controller of its feature (222) comprises that also a main microprocessing unit (901) and one are from microprocessing unit (902), described main microprocessing unit (901), describedly interconnect between microprocessing unit (902) and described channel control logic module (903) three, described channel control logic module (903) links to each other with described main control unit (206) by described microprocessing unit (902).

7, radio fixed station as claimed in claim 2, it is characterized in that: comprise that also one one end links to each other with described antenna feeder, the air feedback unit that the other end links to each other with described radio frequency unit, described air feedback unit comprises: a duplexer (A03), two power combiners (A01), and power divider (A02), described duplexer (A03) end is connected with antenna feeder, and the other end links to each other with described radio frequency unit (205) with described power divider (A02) by a power combiner (A01) respectively; Another power combiner (A01) end is connected with antenna feeder, and the other end links to each other with described radio frequency unit (205).

8, as claim 3 or 6 or 7 described radio fixed stations, it is characterized in that: described radio frequency unit (205) comprise at least one, separate signal processing channel (501).

9, radio fixed station as claimed in claim 8, it is characterized in that: described main control unit (206) comprises switching network (301), primary processor (302), DTMF coding/decoding and signal tone maker (304), PCM coder (311), PCM line (313) and the clock circuit (312) that clock signal is provided for each module in the described main control unit (206), be connected with described switching network (301) on the described PCM line (313), described DTMF coding/decoding and signal tone maker (304) and described analog subscriber interface unit (207), described switching network (301) is finished the exchange of local internal traffic; Described DTMF coding/decoding and signal tone maker (304) carry out the coding/decoding of dtmf signal, produce various signal tones, and communicate by letter with described primary processor (302); Described PCM coder (311) other end links to each other with described signal processing channel (501), finishes the transmission of voice signal between described analog subscriber interface unit (207) and described radio frequency unit (205).

10, radio fixed station as claimed in claim 9, it is characterized in that: described main control unit (206) also comprises parallel channel (306), the communication controler (307) that links to each other with described analog subscriber interface unit (207), the serial ports controller (308) that links to each other with described communication controler (307), and the variable connector (310) that links to each other with described serial ports controller (308), described communication controler (307) is by described parallel channel (306) communicate by letter with described primary processor (302), transmitting the data of described analog subscriber interface unit (207) gives described analog subscriber interface unit (207) from the control information of described primary processor (302) for described primary processor (302) and forwarding, report the information of relevant described radio frequency unit (205) to described primary processor (302), in addition, described communication controler (307) also links to each other with described variable connector (310), and described radio frequency unit (205) is controlled.

11, radio fixed station as claimed in claim 10 is characterized in that: described main control unit (206) also comprises the program and the memory of data (303,305) of storing described primary processor (302), described DTMF coding/decoding and signal tone maker (304) and described communication controler (307).

12, radio fixed station as claimed in claim 11, it is characterized in that: described signal processing channel (501) comprises the microcontroller (601) that links to each other with described variable connector (310), the base band signal process circuit (602) that links to each other with described PCM coder (311) with described microcontroller (601), be connected between described microcontroller (601) and the described base band signal process circuit, and the radiofrequency signal transmission circuit (603) that links to each other with described mixer (204) with described splitter (202), and be connected signaling process circuit (604) between the opposite side of described microprocessor (601) and described base band signal process circuit (602), described microcontroller (601) is reported the state of this passage to described main control unit (206), accept the configuration of described main control unit (206), receive and control from the signal of other described circuit in the described signal processing channel (501) and to each described circuit.

13, radio fixed station as claimed in claim 12 is characterized in that: described microcontroller (601) links to each other with described variable connector (310) with asynchronous serial port.

14, as claim 12 or 13 described radio fixed stations, it is characterized in that: described base band signal process circuit (602) comprises audio frequency emission path (701), and audio frequency receives path (702), and infrasonic frequency busy-flash signal CTCSS testing circuit (703).

15, radio fixed station as claimed in claim 14 is characterized in that:: described signaling process circuit (604) is a MSK signaling process circuit.

16, radio fixed station as claimed in claim 15 is characterized in that: described signal processing channel (501) also comprises FSK signaling process circuit.

17, as claim 15 or 16 described radio fixed stations, it is characterized in that: described audio frequency emission path (701) comprises the preemphasis circuit (701A) in order to lifting speech medium-high frequency component, raising signal to noise ratio that links to each other successively, the low-pass filter circuit of filtering out-of-band noise (701B), with signaling and the synthetic adder (701C) of audio signal, and level adjusting circuit (701D).

18, radio fixed station as claimed in claim 17 is characterized in that: described audio frequency receives path (702) and comprises that the elimination voiced band external noise that links to each other successively is to isolate band pass filter (702A), the deaccentuator (702A) in order to demodulated voice signals and signaling-information, amplifying circuit (702C), the level adjusting circuit (702D) of infrasonic frequency busy-flash signal CTCSS.

19, radio fixed station as claimed in claim 18 is characterized in that: described infrasonic frequency busy-flash signal CTCSS testing circuit (703) comprises buffer circuit (703A), high-order lowpass filter circuit (703B) and the shaping circuit (703D) that links to each other successively.

20, radio fixed station as claimed in claim 13, it is characterized in that: described radiofrequency signal transmission circuit (603) comprises receiving unit and radiating portion, wherein receiving unit comprises the band pass filter (801) of the filtering noise that links to each other successively, low noise amplifier (802), the band pass filter of filtering image frequency (803), difference frequency produces first frequency mixer (804) of first intermediate-freuqncy signal, the band pass filter (807) of filtering second image frequency, be used for the IF processing unit (808) that demodulation produces audio signal (ARx) and radio field intensity signal (RSSI), and the receive frequency synthesizer (805) that first local oscillation signal is provided for described first frequency mixer (804), control described receive frequency synthesizer (805) and produce the two phase-locked loop (806) that receives local oscillator; Described radiating portion comprises the low pass filter (813) that limits the input bandwidth, voice signal and signaling-information is modulated at radio frequency power amplification modules (810) and the band pass filter (809) that VCXO (812), RF excited circuit (811), the rate of doing work on the transmitting carrier frequency are amplified, and described two phase-locked loop (806) is also controlled described VCXO (812) and produced and launch carrier signal.

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