CN202282776U - Receiver and base station system - Google Patents
Receiver and base station system Download PDFInfo
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- CN202282776U CN202282776U CN2011204183855U CN201120418385U CN202282776U CN 202282776 U CN202282776 U CN 202282776U CN 2011204183855 U CN2011204183855 U CN 2011204183855U CN 201120418385 U CN201120418385 U CN 201120418385U CN 202282776 U CN202282776 U CN 202282776U
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- filter
- receiver
- base station
- station system
- noise amplifier
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Abstract
The utility model provides a receiver. The receiver comprises an antenna, a first filter, a low-noise amplifier, a second filter, a mixer, an image inhibiting filter, a digital-to-analog converter and a baseband demodulation circuit which are connected in sequence. By adopting the receiver, the out-of-band strong blocking resistance of the receiver is enhanced, and the dynamic range of the receiver is enlarged, so as to reduce the sampling rate selection and the intermediate frequency selection of the digital-to-analog converter at the rear end of the receiver link and requirements on hardware design of the image inhibiting filter. The utility model also provides a base station system comprising the receiver, the outer blocking resistance of the base station system is improved via the receiver, and the dynamic range of the base station system is enlarged.
Description
Technical field
The utility model relates to mobile communication technology, particularly a kind of receiver and base station system.
Background technology
Barrage jamming can be referred to as when interference signal surpass to receive the maximal power level that function bears, to cause the saturation of receiver, the interference that causes receiver performance to descend.Barrage jamming is the most serious a kind of interference of influence in wireless communication system; Can cause the receiver can't operate as normal when serious; Influence the dynamic range of receiver, block the characteristic that to destroy Sensitive Apparatus in the receiver for a long time, cause the permanent decline of receiver performance.
Wherein, The dynamic range of receiver can be described as intuitively; Receiver is under the normal prerequisite of performance; Minimum that can receive and the scope between the maximal power level, wherein maximal power level can be regarded as the maximum obstruction signal that can bear, and Minimum Power Level can be referred to as to accept sensitivity.
Barrage jamming can be divided into band external blocking and band internal congestion.Whole world frequency range utilance is increasingly high, and interfering with each other between the successive bands is increasing, therefore in the receiver design, requires increasingly high for the inhibition of blocking.
Traditional receiver; In order to tackle the increasingly high barrage jamming problem that requires; Filter through high power levels is set suppresses band external blocking point; But because squareness factor and its insertion loss of passive filter are inverse relations, the filter of high power levels will inevitably increase the noise factor of link to the suppression characteristic with outer strong choke point.
And, for the receiving sensitivity of receiver
Sensitivity,Its formula is following:
Psen≥SNR+?(Pnoise-bw+NF)
Can find out that by above-mentioned formula the NF of sensitivity and link is an inverse relation.So traditional receiver also will inevitably cause accepting the decline of sensitivity to the outer strong inhibition technology of blocking of frequency band.
The utility model content
In order to address the above problem, the utility model provides a kind of receiver, is guaranteeing chain noise factor, is accepting under the impregnable prerequisite of sensitivity, has realized that receiver strong obstruction outside band comes the interim purpose of avoiding disturbing.
A kind of receiver comprises:
The antenna, first filter, low noise amplifier, second filter, frequency mixer, image-reject filter, digital to analog converter and the base band demodulating circuit that connect successively.
Compared with prior art, the receiver of the utility model slackens the signal that blocks frequency blocking to come temporarily through first filter, guarantees that low noise amplifier is operated in unsaturated state; Second filter slackens interference signal in the demodulation module acceptable scope of rear end, has improved the outer strong ability of blocking of anti-band of receiver, improves the dynamic range of receiver; Thereby the sample rate that has reduced the analog to digital converter of receiver link rear end is selected, intermediate frequency is selected and the hardware designs requirement of image-reject filter.
In order to address the above problem, the utility model provides a kind of base station system.
A kind of base station system comprises above-mentioned receiver.
Compared with prior art, the base station system of the utility model has improved the outer strong block capability of anti-band of base station system through above-mentioned receiver, improves the dynamic range of base station system.
Description of drawings
Fig. 1 is the structural representation of the receiver of the utility model;
Fig. 2 is the structural representation of an embodiment of the receiver of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the receiver of the utility model is described in detail.
See also Fig. 1, Fig. 1 is the structural representation of the receiver of the utility model; Comprise:
The antenna, first filter, low noise amplifier, second filter, frequency mixer, image-reject filter, digital to analog converter and the base band demodulating circuit that connect successively.
Said second filter comprises and is used for interference signal is impaired to the filter in the preset scope of rear end base band demodulating module that preferably, said second filter comprises high cavity body filter or the high dielectric filter that suppresses of suppressing.
Be designed to high cavity body filter or the high dielectric filter that suppresses of suppressing; Realized the high suppression characteristic that mirror filter can't be realized to the strong obstruction in band edge place; Substituted traditional technology (promptly regulating front-end gain attenuator protection analog to digital converter automatically) that analog to digital converter overflows that prevents; Improved the gain of low noise amplifier, its high performance that suppresses can slacken interference signal in the base band demodulating circuit acceptable scope of rear end in strong the obstruction temporarily.
Said first filter comprises the filter that is used to weaken obstruction frequency signal, and preferably, said first filter is low Insertion Loss cavity body filter.
Be designed to low loss filter, greatly reduce, blocking to come temporarily, slacken the signal that blocks frequency, thereby guarantee that low noise amplifier is operated in unsaturated state receiving the chain noise factor.
First filter is mainly used its low Insertion Loss performance, and second filter is mainly used its highly inhibited ability.
For example certain obstruction index is designed with following requirement to receiver: the inhibition of the outer 1.2MHz demand 40dB of (passband is a 700MHz LTE frequency range) band; The passband Insertion Loss is less than 1dBm.
Then for above-mentioned designing requirement; In one embodiment, can choose Insertion Loss less than 1dB, suppressing at the outer 1.2MHz of band is that the cavity body filter of 10dB is as first filter; Choose the outer 1.2MHz of band inhibition greater than 30dB, Insertion Loss less than cavity (or medium) filter of 5dB as second filter.
See also Fig. 2, Fig. 2 is the structural representation of an embodiment of the receiver of the utility model.
Preferably, receiver also comprises the amplifier that is connected between said second filter and the said frequency mixer.This amplifier has been realized signal is further amplified as second level amplifier.
Preferably, receiver also comprises the gain control circuit that is connected between said amplifier and the said frequency mixer.This gain control circuit has been realized the gain-adjusted to signal.
As a kind of execution mode, first filter in the receiver, second filter and low noise amplifier are connected in the integrated duplexer, and this integrated duplexer also comprises the downstream filter that is used for downstream signal is carried out filtering.
To the outer strong block techniques problem of the above-mentioned band that solves, a kind of method for designing of receiver system link hardware of the utility model below is provided, mainly may further comprise the steps:
Through actual measurement/calculating,, confirm the outer strong maximum level value of blocking of band that receiver possibly face perhaps according to the requirement of standard and technical specification book; Calculate the chain noise factor of the maximum that link requires then when minimum receiving sensitivity.
Choose low noise amplifier; Confirm the maximal input value of the obstruction frequency that low noise amplifier can bear under the prerequisite that noise factor does not worsen according to emulation and technical specification book; Combining amplifier maximum linear input and output power points is designed the technical indicator of first filter.
The least gain that calculating receiver link need satisfy and the maximum input level of analog to digital converter in conjunction with the obstruction power level after suppressing through first filter, are designed the technical indicator of second filter.
Through the gain of analog to digital converter front end and the sample rate of blocking suppression characteristic combination analog to digital converter, choose best IF-FRE, the technical indicator of image-reject filter is proposed simultaneously.
Through the receiver system link simulation, require index to be the basis with noise factor and the outer strong obstruction of band, in conjunction with other index (like OIP3, reserve gain attenuator etc.), the technical indicator of other each module of distribute links or device.
In sum, the design's method mainly is the technical indicator demand through receiver, with the barrage jamming of band edge and accept sensitivity as the core design target, each building block technique index in the distribute links.Through each frequency range receiver is blocked the index demand analysis by force; Solved the outer strong very little performance of interim receiver sensitivity deterioration of blocking to come of band that traditional receiver can't be realized; Be applicable to that band efficiency is high; The receiver that the band edge barrage jamming is strong designs, and is applicable to the communication system of any standard, like GSM, WCDMA, CDMA, CDMA2000, LTE etc.
Set forth the embodiment of the base station system of the utility model below.
A kind of base station system comprises above-mentioned receiver.Improve the outer strong block capability of anti-band of base station system through this receiver, improved the dynamic range of base station system.
Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.The modification of being done within any spirit and principle at the utility model, be equal to replacement and improvement etc., all should be included within the claim protection range of the utility model.
Claims (9)
1. receiver comprises antenna, low noise amplifier, the frequency mixer, image-reject filter, digital to analog converter and the base band demodulating circuit that connect successively; It is characterized in that, also comprise:
Be connected first filter between antenna and the low noise amplifier;
Be connected second filter between low noise amplifier and the frequency mixer.
2. receiver according to claim 1 is characterized in that, said second filter is high cavity body filter or the high dielectric filter that suppresses of suppressing.
3. receiver according to claim 1 is characterized in that, said first filter is low Insertion Loss cavity body filter.
4. according to each described receiver of claim 1 to 3, it is characterized in that, also comprise the amplifier that is connected between said second filter and the said frequency mixer.
5. receiver according to claim 4 is characterized in that, also comprises the gain control circuit that is connected between said amplifier and the said frequency mixer.
6. receiver according to claim 5 is characterized in that, said first filter, second filter and low noise amplifier are connected in the integrated duplexer.
7. receiver according to claim 1 is characterized in that, said first filter comprises the filter that is used to weaken obstruction frequency signal.
8. receiver according to claim 1 is characterized in that, said second filter comprises and is used for interference signal is impaired to the filter in the preset scope of rear end base band demodulating module.
9. a base station system is characterized in that, comprises like each described receiver of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204183855U CN202282776U (en) | 2011-10-28 | 2011-10-28 | Receiver and base station system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204183855U CN202282776U (en) | 2011-10-28 | 2011-10-28 | Receiver and base station system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282776U true CN202282776U (en) | 2012-06-20 |
Family
ID=46228926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204183855U Expired - Lifetime CN202282776U (en) | 2011-10-28 | 2011-10-28 | Receiver and base station system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282776U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052558A (en) * | 2014-07-07 | 2014-09-17 | 中国船舶重工集团公司第七二四研究所 | Test method for out-of-band rejection of high-sensitivity digital receiver |
| CN109861653A (en) * | 2018-12-28 | 2019-06-07 | 成都燎原星光电子有限责任公司 | A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect |
| CN110138412A (en) * | 2019-06-03 | 2019-08-16 | 维沃移动通信有限公司 | A kind of electronic equipment |
-
2011
- 2011-10-28 CN CN2011204183855U patent/CN202282776U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052558A (en) * | 2014-07-07 | 2014-09-17 | 中国船舶重工集团公司第七二四研究所 | Test method for out-of-band rejection of high-sensitivity digital receiver |
| CN109861653A (en) * | 2018-12-28 | 2019-06-07 | 成都燎原星光电子有限责任公司 | A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect |
| CN110138412A (en) * | 2019-06-03 | 2019-08-16 | 维沃移动通信有限公司 | A kind of electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |
|
| CX01 | Expiry of patent term |