CN104901752A - Method and device for calculating isolation bandwidth of combiner - Google Patents
Method and device for calculating isolation bandwidth of combiner Download PDFInfo
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- CN104901752A CN104901752A CN201510229717.8A CN201510229717A CN104901752A CN 104901752 A CN104901752 A CN 104901752A CN 201510229717 A CN201510229717 A CN 201510229717A CN 104901752 A CN104901752 A CN 104901752A
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Abstract
Embodiments of the invention disclose a method and a device for calculating the isolation bandwidth of a combiner, which relate to the technical field of communications and can solve the problem of resource waste of communication systems due to large isolation bandwidth when two adjacent communication systems are combined. The method comprises: determining the insertion loss and the port isolation degree of the combiner; calculating the total isolation bandwidth of an isolation strip in the combiner according to the insertion loss and the port isolation degree; determining protective bandwidths adjacent to the isolation strip in combined systems which are at least two communication systems combined by the combiner; and calculating the actual isolation bandwidth of the combiner according to the protective bandwidths of the combined systems and the total isolation bandwidth. The method is suitable for a calculating device.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of computational methods and device of mixer isolation bandwidth.
Background technology
Mixer is the Primary Component that indoor distributed system Multi net voting is shared, mainly as being that many communication system signals are closed road to a set of indoor distributed system, it forms fixed RF passage by two or more directional filter, only allow the frequency signal in passband to pass through, other frequency and reverse signal stop current.Filter passband Qu always has certain loss, and especially comparatively large in passband edge loss, the insertion loss of mixer can have influence on the efficiency of communication system; Further, in order to mobile communication system under ensureing common location situation is normally run, the requirement of the port isolation demand fulfillment agreement of mixer in indoor distributed system, so the insertion loss of mixer and interport isolation are the important indicators weighing mixer performance.Under the condition of prior art, mixer is when insertion loss and interport isolation reach requirement, certain isolation bandwidth is required between the passband of the communication system on involutory road, the size of isolation bandwidth is calculated by simulation software according to the value of insertion loss and interport isolation, for two communication systems that passband is adjacent, when it closes road by mixer, generally at least retain the isolation bandwidth of 5MHz.
In prior art, at least there are the following problems: along with the development of mobile communication, frequency resource is more and more nervous, the phenomenon that communication system frequency is adjacent gets more and more, in prior art, during adjacent two communication system integration roads, in order to the insertion loss and interport isolation that ensure mixer reach requirement, general road system interval of closing at least takies 5MHz frequency resource from bandwidth, and this wider isolation bandwidth can make the resource of communication system produce very large waste.
Summary of the invention
Embodiments of the invention provide a kind of computational methods and device of mixer isolation bandwidth, need wider isolation bandwidth when can solve two adjacent communication system integration roads, make the resource of communication system produce the problem of waste.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, embodiments of the invention provide a kind of computational methods of mixer isolation bandwidth, comprising:
Determine insertion loss and the interport isolation of mixer;
Total isolation bandwidth of described mixer is calculated according to described insertion loss and described interport isolation;
Determine the protection bandwidth of described conjunction road system;
According to the protection bandwidth sum of described conjunction road system, total isolation bandwidth calculates the actual isolation bandwidth of described mixer.
Second aspect, embodiments of the invention provide a kind of calculation element of mixer isolation bandwidth, comprising:
Determining unit, for determining insertion loss and the interport isolation of mixer;
Computing unit, for calculating total isolation bandwidth of described mixer according to described insertion loss and described interport isolation;
Described determining unit is also for determining the protection bandwidth of described conjunction road system;
Described computing unit also calculates the actual isolation bandwidth of described mixer for isolation bandwidth total according to the protection bandwidth sum of described conjunction road system.
The computational methods of a kind of mixer isolation bandwidth that the embodiment of the present invention provides and device, first determine insertion loss and the interport isolation of mixer in the present invention, and calculate total isolation bandwidth of mixer according to insertion loss and interport isolation; Then determine the protection bandwidth of closing road system, and calculate the actual isolation bandwidth of mixer according to the total isolation bandwidth of protection bandwidth sum closing road system.So; calculation element can utilize the part of closing in the system of road and protecting bandwidth as total isolation bandwidth required during mixer conjunction road; reduce the frequency band isolation of closing between the system of road; thus minimizing isolation bandwidth needs the bandwidth of the Ge He road system taken; relative increases the bandwidth of each system for transmitting; avoid wasting frequency resource, improve the utilance of frequency resource.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The method flow diagram that Fig. 1 provides for one embodiment of the invention;
The method flow diagram that Fig. 2 provides for further embodiment of this invention;
The boundary belt position view that Fig. 3 provides for further embodiment of this invention;
The isolation bandwidth position view that Fig. 4 provides for further embodiment of this invention;
The apparatus structure schematic diagram that Fig. 5 provides for further embodiment of this invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
For making the advantage of technical solution of the present invention clearly, below in conjunction with drawings and Examples, the present invention is elaborated.
One embodiment of the invention provides a kind of computational methods of mixer isolation bandwidth, for calculation element, calculation element is for having the device or equipment that realize methodological function described in this large bright embodiment, can by installing related software or hardware makes it have the function realizing method described in the embodiment of the present invention in device or equipment, as shown in Figure 1, described method comprises:
101, the insertion loss of calculation element determination mixer and interport isolation.
102, calculation element calculates total isolation bandwidth of isolation strip in described mixer according to described insertion loss and described interport isolation.
Wherein, calculation element calculates total isolation bandwidth of described mixer mode according to described insertion loss and described interport isolation can adopt the method according to insertion loss and interport isolation simulation calculation isolation bandwidth in prior art, because all there is the simulation software of independent research or purchase in each company, so the method for emulation does not limit at this.
103, calculation element is determined to close protection bandwidth adjacent with described isolation strip in the system of road.
Wherein, closing road system is at least two communication systems of being closed road by described mixer, and the frequency band closing road system comprises work strip and boundary belt two kinds.Calculation element can determine the protection bandwidth of described conjunction road system according to the configuration information of described conjunction road system.
104, calculation element total isolation bandwidth according to described protection bandwidth sum calculates the actual isolation bandwidth of described mixer.
In the embodiment of the present invention, computer can according to formula: protection bandwidth+actual isolation bandwidth adjacent with isolation strip in total isolation bandwidth=conjunction road system, calculates the actual isolation bandwidth of described mixer.
It should be noted that; protect bandwidth as a part for the total isolation bandwidth of mixer in the system of embodiment of the present invention Zhong Jianghe road; reduce isolation bandwidth and need the bandwidth of operation taking Ge He road system, especially the scene that road system closes road is closed for adjacent frequency, avoid wasting frequency resource.Simultaneously, to needing 4G (the 4th Generation utilizing wider bandwidth realization high-speed data communication, forth generation mobile communication technology) wide-band communication system, the method in the embodiment of the present invention is all right reduces isolation strip to the impact of its high speed data transfer.
It should be noted that, the embodiment of the present invention can be applied to several scenes, such as, LTE (Long Term Evolution, Long Term Evolution) FDD (Frequency Division Duplexing, Frequency Division Duplexing (FDD)) adjacent frequency of system and LTE TDD system closes road, the adjacent frequency of LTE TDD (Time Division Duplexing, time division duplex) system and LTE TDD system closes road, LTE FDD system and LTE FDD system etc. the conjunction road of broadband near frequency system.
First determine insertion loss and the interport isolation of mixer in the present invention, and calculate total isolation bandwidth of mixer according to insertion loss and interport isolation; Then determine the protection bandwidth of closing road system, and calculate the actual isolation bandwidth of mixer according to the total isolation bandwidth of protection bandwidth sum closing road system.So; calculation element can utilize the part of closing in the system of road and protecting bandwidth as total isolation bandwidth required during mixer conjunction road; reduce the frequency band isolation of closing between the system of road; thus minimizing isolation bandwidth needs the bandwidth of the Ge He road system taken; relative increases the bandwidth of each system for transmitting; avoid wasting frequency resource, improve the utilance of frequency resource.
Further embodiment of this invention provides a kind of computational methods of mixer isolation bandwidth, for calculation element, such as, computer, mixer, for adjacent frequency mixer, needs the system of closing road to be that the first conjunction road system and second closes road system, as shown in Figure 2, described method comprises:
201, the insertion loss of calculation element determination adjacent frequency mixer.
Wherein, in the embodiment of the present invention, mixer carries out conjunction road to Liang Gehe road system, and passage corresponding to each conjunction road system has corresponding insertion loss value.The defining method of insertion loss does not limit at this, can first allow to fall up Insertion Loss corresponding to quick value according to the budget determination upstream sensitivity closing road system uplink sensitivity; Budget determination descending power link according to closing road system descending power link allows the descending Insertion Loss that pad value is corresponding; Then, the minimum value in up Insertion Loss and descending Insertion Loss is defined as the insertion loss closing road system respective channel.Above-mentioned up Insertion Loss and descending Insertion Loss directly can obtain from operator, such as, operator determines that the first conjunction road system uplink allows that the up Insertion Loss falling quick value corresponding is 0.8dB, the first descending Insertion Loss closing road system descending power link permission pad value corresponding is 1dB, then the insertion loss that the first conjunction paths that in mixer, the first conjunction road system is corresponding is allowed is defined as 0.8dB.
202, the interport isolation of calculation element determination adjacent frequency mixer.
Wherein, the mode that the interport isolation of adjacent frequency mixer is determined can be, closes when road system and second closes system conjunction road, road avoid disturbing required isolation determination interport isolation between system by first.
Such as, first conjunction road system is UNICOM 1.8GHz LTE FDD system, second system is telecommunications 1.8GHz LTE FDD system, first conjunction road system and second is closed road system and is positioned at same frequency range, close road system interference second for first and close road system, first interference of closing between road system and the second conjunction road system has two kinds, the first interference is the signal of the first conjunction road systems radiate closes road system transmitted passband by the passage interference in mixer second, the second interference is the signal of the first conjunction road systems radiate closes road system received passband by the passage interference in mixer second.The first interference comprises adjacent carrier wave mutual interference and standing wave interference, for adjacent carrier wave mutual interference, when operator's involutory road system carries out broadband configuration, standard in 3GPP agreement ensure that the first conjunction road system and second closes that road system can adjacent carrier wave be noiseless coexists, so do not need when determining isolation to consider adjacent carrier wave mutual interference, standing wave is disturbed, as long as the return loss that the decay of the standing wave that the isolation of mixer makes the first conjunction road system produce is corresponding more than the second conjunction road system standing wave thresholding, road system standing-wave ratio (VSWR is closed with second in the embodiment of the present invention, Voltage Standing Wave Ratio) thresholding be 1.5 for example, according to formula: it is 14dB that return loss=20*log10 [(VSWR+1)/(VSWR-1)]=14dB calculates now return loss, show after adding certain allowance (generally getting 6dB) on this basis again that return loss is 20dB, then can determine, in order to avoid first closes the standing wave interference of road system to the second conjunction road system, the isolation of mixer is at least 20dB.Closing road system due to the first conjunction road system and second is with frequency system, first closes road system RRU (Remote Radio Unit, remote radio unit (RRU)) duplexer mixer just can be made to avoid the second to disturb, even if so the interport isolation of mixer is 0 the second still can be avoided to disturb.In sum, the isolation of mixer is 20dB.
It should be noted that, when first closes road system and the second conjunction road system is not same frequency range system, the value of interport isolation directly can be calculated by the relevant regulations of agreement and obtain; When first closes road system and the second conjunction road system is same frequency range system, need to consider above-mentioned two kinds of interference calculation methods.
It should be noted that, step 201 and step 202 can perform simultaneously, and also can successively perform, sequencing does not limit.
203, calculation element calculates total isolation bandwidth according to the interport isolation of the insertion loss of adjacent frequency mixer and adjacent frequency mixer.
Wherein, total isolation bandwidth is that the first conjunction road system and second closes the isolation bandwidth needed when road system closes road.Calculation element calculates total isolation bandwidth of mixer mode according to insertion loss and interport isolation can adopt the method according to insertion loss and interport isolation simulation calculation isolation bandwidth in prior art, because all there is the simulation software of independent research or purchase in each company, so the method for emulation does not limit at this.
204, calculation element determines that the protection bandwidth sum second of the first conjunction road system closes the protection bandwidth of road system respectively.
Wherein, as shown in Figure 3, boundary belt is that each system is in order to avoid producing interference, the bandwidth of each reserved one fixed width at the two ends of configured bandwidth to band external system.The protection bandwidth of each system might not be identical.
It should be noted that, step 201, step 202 and step 203 are the process calculating total isolation bandwidth, and process and step 204 can perform simultaneously, and also can successively perform, sequencing does not limit.
205, calculation element closes the actual isolation bandwidth of protection bandwidth sum total isolation bandwidth calculating adjacent frequency mixer of road system according to the protection bandwidth, second that first closes road system.
Wherein, the mode calculating the isolation bandwidth of adjacent frequency mixer can be: according to formula; total isolation bandwidth=the first is closed the protection bandwidth+isolation bandwidth+the second adjacent with isolation strip in the system of road and closes protection bandwidth adjacent with isolation strip in the system of road, calculates the isolation bandwidth of described mixer.As shown in Figure 4, be the position relationship that the bandwidth, second of the first conjunction road system closes the bandwidth sum isolation bandwidth of road system.
It should be noted that, the embodiment of the present invention can be applied to several scenes, such as, the adjacent frequency of LTE FDD system and LTE TDD system closes road, the adjacent frequency of LTE TDD system and LTE TDD system closes road, LTE FDD system and LTE FDD system etc. the conjunction road of broadband near frequency system.
It should be noted that; protect bandwidth as a part for the total isolation bandwidth of mixer in the system of embodiment of the present invention Zhong Jianghe road; reduce isolation bandwidth and need the bandwidth of operation taking Ge He road system, especially the scene that road system closes road is closed for adjacent frequency, avoid wasting frequency resource.Simultaneously, to needing 4G (the 4th Generation utilizing wider bandwidth realization high-speed data communication, forth generation mobile communication technology) wide-band communication system, the method in the embodiment of the present invention is all right reduces isolation strip to the impact of its high speed data transfer.
First determine insertion loss and the interport isolation of mixer in the present invention, and determine the protection bandwidth of closing road system; Then calculate total isolation bandwidth of mixer according to insertion loss and interport isolation, calculate the actual isolation bandwidth of mixer according to the total isolation bandwidth of protection bandwidth sum closing road system.So, calculation element can utilize a part of closing total isolation bandwidth required when the non-bandwidth for transmitting in road system closes road as mixer, reduce the frequency band isolation of closing between the system of road, thus minimizing isolation strip needs the bandwidth of the Ge He road system taken, relative increases the bandwidth of each system for transmitting, avoid wasting frequency resource, improve the utilance of frequency resource.
Further embodiment of this invention provides a kind of calculation element 30 of mixer isolation bandwidth, and as shown in Figure 5, described device 30 comprises:
Determining unit 31, for determining insertion loss and the interport isolation of mixer;
Computing unit 32, for calculating total isolation bandwidth of isolation strip in described mixer according to described insertion loss and described interport isolation;
Described determining unit 31 also closes protection bandwidth adjacent with described isolation strip in the system of road for determining, described conjunction road system is at least two communication systems of being closed road by described mixer;
Described computing unit 32 also calculates the actual isolation bandwidth of described mixer for isolation bandwidth total according to the protection bandwidth sum of described conjunction road system.
Further, described computing unit 32 is specifically for according to formula: protection bandwidth+actual isolation bandwidth adjacent with isolation strip in total isolation bandwidth=conjunction road system, calculates the actual isolation bandwidth of described mixer.
Further, described conjunction road system is near frequency system; Avoid between system, disturbing required isolation to determine described interport isolation when described determining unit 31 is specifically for closing road according to described conjunction road system.
Further, described determining unit 31 is specifically for determining the protection bandwidth of described conjunction road system according to the configuration information of described conjunction road system.
Further, described determining unit 31 specifically for determine according to the budget of described conjunction road system uplink sensitivity with upstream sensitivity allow up insertion loss corresponding to quick value falls; And, for determining the descending insertion loss corresponding with the permission pad value of descending power link according to the budget of described conjunction road system descending power link; And, for the minimum value in described up Insertion Loss and described descending Insertion Loss is defined as described insertion loss.
First determine insertion loss and the interport isolation of mixer in the present invention, and determine the protection bandwidth of closing road system; Then calculate total isolation bandwidth of mixer according to insertion loss and interport isolation, calculate the actual isolation bandwidth of mixer according to the total isolation bandwidth of protection bandwidth sum closing road system.So, calculation element 30 can utilize a part of closing total isolation bandwidth required when the non-bandwidth for transmitting in road system closes road as mixer, the isolation bandwidth of mixer reality is diminished, thus minimizing isolation strip needs the bandwidth of the Ge He road system taken, relative increases the bandwidth of each system for transmitting, avoid wasting frequency resource, improve the utilance of frequency resource.
The calculation element of the mixer isolation bandwidth that the embodiment of the present invention provides can realize the above-mentioned embodiment of the method provided, and concrete function realizes the explanation referred in embodiment of the method, does not repeat them here.The computational methods of the mixer isolation bandwidth that the embodiment of the present invention provides and device, go for calculation element, but be not limited only to this.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. computational methods for mixer isolation bandwidth, is characterized in that, comprising:
Determine insertion loss and the interport isolation of mixer;
Total isolation bandwidth of isolation strip in described mixer is calculated according to described insertion loss and described interport isolation;
Determine to close protection bandwidth adjacent with described isolation strip in the system of road, described conjunction road system is at least two communication systems of being closed road by described mixer;
According to the protection bandwidth sum of described conjunction road system, total isolation bandwidth calculates the actual isolation bandwidth of described mixer.
2. method according to claim 1, is characterized in that, the described isolation bandwidth that total isolation bandwidth calculates described mixer according to the protection bandwidth sum of described conjunction road system comprises:
According to formula: protection bandwidth+actual isolation bandwidth adjacent with isolation strip in total isolation bandwidth=conjunction road system, calculates the actual isolation bandwidth of described mixer.
3. method according to claim 1 and 2, is characterized in that, describedly determines that the interport isolation of mixer comprises:
Avoid between system, disturbing required isolation to determine described interport isolation when closing road according to described conjunction road system.
4. method according to claim 1 and 2, is characterized in that, describedly determines that the insertion loss of mixer comprises:
According to the budget of described conjunction road system uplink sensitivity determine with upstream sensitivity allow up insertion loss corresponding to quick value falls;
The descending insertion loss corresponding with the permission pad value of descending power link is determined in budget according to described conjunction road system descending power link;
Minimum value in described up insertion loss and described descending insertion loss is defined as described insertion loss.
5. method according to claim 1 and 2, is characterized in that, describedly determines that the protection bandwidth of described conjunction road system comprises:
The protection bandwidth of described conjunction road system is determined according to the configuration information of described conjunction road system.
6. a calculation element for mixer isolation bandwidth, is characterized in that, comprising:
Determining unit, for determining insertion loss and the interport isolation of mixer;
Computing unit, for calculating total isolation bandwidth of isolation strip in described mixer according to described insertion loss and described interport isolation;
Described determining unit also closes protection bandwidth adjacent with described isolation strip in the system of road for determining, described conjunction road system is at least two communication systems of being closed road by described mixer;
Described computing unit also calculates the actual isolation bandwidth of described mixer for isolation bandwidth total according to the protection bandwidth sum of described conjunction road system.
7. device according to claim 6, is characterized in that, described computing unit is specifically for according to formula: protection bandwidth+actual isolation bandwidth adjacent with isolation strip in total isolation bandwidth=conjunction road system, calculates the actual isolation bandwidth of described mixer.
8. the device according to claim 6 or 7, is characterized in that, described conjunction road system is near frequency system; Avoid between system, disturbing required isolation to determine described interport isolation when described determining unit is specifically for closing road according to described conjunction road system.
9. the device according to claim 6 or 7, is characterized in that, described determining unit specifically for determine according to the budget of described conjunction road system uplink sensitivity with upstream sensitivity allow up insertion loss corresponding to quick value falls; And, for determining the descending insertion loss corresponding with the permission pad value of descending power link according to the budget of described conjunction road system descending power link; And, for the minimum value in described up Insertion Loss and described descending Insertion Loss is defined as described insertion loss.
10. the device according to claim 6 or 7, is characterized in that, described determining unit is specifically for determining the protection bandwidth of described conjunction road system according to the configuration information of described conjunction road system.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229717.8A CN104901752B (en) | 2015-05-07 | 2015-05-07 | Method and device for calculating isolation bandwidth of combiner |
| EP16789343.7A EP3293813B1 (en) | 2015-05-07 | 2016-05-07 | Method and device for combining minimum isolation bandwidths |
| AU2016258645A AU2016258645B2 (en) | 2015-05-07 | 2016-05-07 | Method and Device for Combining with a Minimum Isolation Bandwidth |
| PCT/CN2016/081356 WO2016177349A1 (en) | 2015-05-07 | 2016-05-07 | Method and device for combining minimum isolation bandwidths |
| US15/683,072 US10419951B2 (en) | 2015-05-07 | 2017-08-22 | Method and device for setting an isolation bandwidth of a combiner |
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| CN201510229717.8A CN104901752B (en) | 2015-05-07 | 2015-05-07 | Method and device for calculating isolation bandwidth of combiner |
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| CN104901752B CN104901752B (en) | 2017-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016177349A1 (en) * | 2015-05-07 | 2016-11-10 | 中国联合网络通信集团有限公司 | Method and device for combining minimum isolation bandwidths |
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| CN101034922A (en) * | 2007-04-19 | 2007-09-12 | 华为技术有限公司 | Signal mixing method, device and same-frequency band and common antenna feedback system for different systems |
| CN101998704A (en) * | 2009-08-20 | 2011-03-30 | 中国计量学院 | Signal combination system |
| CN102291159A (en) * | 2011-08-29 | 2011-12-21 | 中兴通讯股份有限公司 | Multiband intermediate-radio frequency device, emitting and receiving method and transceiver |
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| CN101034922A (en) * | 2007-04-19 | 2007-09-12 | 华为技术有限公司 | Signal mixing method, device and same-frequency band and common antenna feedback system for different systems |
| CN101998704A (en) * | 2009-08-20 | 2011-03-30 | 中国计量学院 | Signal combination system |
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| WO2016177349A1 (en) * | 2015-05-07 | 2016-11-10 | 中国联合网络通信集团有限公司 | Method and device for combining minimum isolation bandwidths |
| US10419951B2 (en) | 2015-05-07 | 2019-09-17 | China United Network Communications Group Company Limited | Method and device for setting an isolation bandwidth of a combiner |
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