CN101814928A - Receiving device and method - Google Patents
Receiving device and method Download PDFInfo
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- CN101814928A CN101814928A CN201010131616A CN201010131616A CN101814928A CN 101814928 A CN101814928 A CN 101814928A CN 201010131616 A CN201010131616 A CN 201010131616A CN 201010131616 A CN201010131616 A CN 201010131616A CN 101814928 A CN101814928 A CN 101814928A
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Abstract
The invention discloses a receiving device and a receiving method. The device comprises a receiving front end unit and a processing unit; when the receiving device receives a first frequency band signal and a second frequency band signal, the receiving front end unit comprises a first filter, a second filter and a matching network; the first filter is used for filtering the first frequency band signal; the second filter is used for filtering the second frequency band signal; the matching network is connected with the first filter and the second filter respectively and used for realizing impedance match for the first frequency band signal filtered by the first filter and the second frequency band signal filtered by the second filter at the same time; and the processing unit is used for receiving and processing the signals after passing through the matching network. Because the first and second matching networks in the prior art are replaced by the matching network and two SP2Ts are not used any more, the technical scheme of the invention reduces the number of devices on a high frequency line, reduces the insertion loss of the receiving device, improves the receiving sensitivity and saves the cost at the same time.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of receiving system and method.
Background technology
Code division multiple access inserts (CDMA in the prior art, Code Division Multiple Access) device adopts the 60x5 design of Platform usually, two shared same receive paths of high band are arranged in this platform, promptly receive personal communication service (PCS, Personal Communication Service) in-band signal and reception advanced wireless service (AWS, Advance Wireless Service) in-band signal all are to utilize same receive path.In other words, in a moment, only allow to receive signal in one of them the frequency range of above-mentioned two frequency ranges in this receive path.Available technology adopting increases the gating that a plurality of single-pole double-throw switch (SPDT)s (SP2T, Single Pole two Throw) carry out frequency range in receive path.
As shown in Figure 1a, in the receiving system of CDMA mobile phone, PCS in-band signal or AWS in-band signal are input to signal in the low noise amplifier (LAN, Low Noise Amplifier) that is integrated among the U700 by a SP2T (being SP2T_4 among Fig. 1 a) control; Be output through the signal after the LNA processing, be the signal of handling back output through LNA as HB_18F among Fig. 1 b; If this signal is the PCS in-band signal, this signal is input to corresponding SAW (Surface Acoustic Wave) filter (SAW, Surface Acoustic Wave) by SP2T_3 control, in SAW_1 among Fig. 1 c; If this signal is the AWS in-band signal, then this signal is input among the corresponding SAW_2 by SP2T_3 control.The two paths of signals of exporting from each difference SAW is input among the U700 respectively through the control of two SP2T.Wherein, the output at each SAW has peripheral impedance matching network (be depicted as impedance matching network in the frame of broken lines in as Fig. 1 c, comprise: first matching network and second matching network).
It will be appreciated that, SP2T_1 and SP2T_2 are controlled at has only the two paths of signals of SAW_1 output output to be imported into U700 in a period of time, perhaps, SP2T_1 and SP2T_2 are controlled at and have only the two paths of signals of SAW_2 output output to be imported among the U700 in a period of time.It will be appreciated that also all SP2T can be the gatings of realizing frequency range by identical logic control signal (not embodying in the drawings).
In research and practice process to prior art, the present inventor finds, for the signal in PCS in-band signal and the AWS frequency range is separated, between the output of SAW and U700, increase SP2T, and at the output configurations match network of each SAW, make and disposed more device on the high frequency receiving lines, increased the insertion loss, reduced receiving sensitivity, too much device makes that the circuit board volume is bigger simultaneously, has increased the cost of production equipment.
Summary of the invention
The embodiment of the invention provides a kind of receiving system and method, adopt shared matching network to replace first, second matching network in the prior art, do not need to re-use two SP2T, reduced the quantity of device on the HF link, reduced the insertion loss of receiving system, improve receiving sensitivity, saved cost simultaneously.
The embodiment of the invention provides a kind of receiving system, described device comprises: receiving front-end unit and processing unit, when described receiving system receives first frequency band signals and second frequency band signals, described receiving front-end unit comprises: first filter, second filter and matching network;
Wherein, described first filter is used for described first frequency band signals is carried out filtering;
Described second filter is used for described second frequency band signals is carried out filtering;
Described matching network is connected respectively with described first filter and second filter, is used for second frequency band signals behind first frequency band signals behind described first filter filtering and described second filter filtering is realized impedance matching simultaneously;
Described processing unit is used to receive through the signal behind the described matching network and handles.
The embodiment of the invention also provides a kind of method of reseptance, and described method is applied to first frequency band signals and the shared receiving system of second frequency band signals, and described method comprises:
Receive first frequency band signals and second frequency band signals;
Described first frequency band signals and second frequency band signals are carried out Filtering Processing;
Realize impedance matching simultaneously by first frequency band signals and second frequency band signals of same matching network after to described Filtering Processing;
Signal after the described impedance matching is received processing.
Realize impedance matching simultaneously by first frequency band signals and second frequency band signals of same matching network after in receiving system that the embodiment of the invention provides and the method to Filtering Processing, thereby make the shared same matching network of first frequency band signals and second frequency band signals, the signal that carries out impedance matching is imported into and receives processing in the processing unit, thereby realize that this matching network replaces in prior art first, second matching network, thereby reduced the quantity of matching network in the prior art, but also do not need to re-use two SP2T, reduced the quantity of device on the HF link, reduced the insertion loss of receiving system, improve receiving sensitivity, saved cost simultaneously.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 a is a LNA front stage circuits schematic diagram in the receiving system in the prior art;
Fig. 1 b is a LNA late-class circuit schematic diagram in the receiving system in the prior art;
Fig. 1 c be in the prior art in the receiving system behind the LNA level to the circuit theory diagrams between the U700;
Fig. 2 is a kind of receiving system schematic diagram that the embodiment of the invention provides;
Fig. 3 is the circuit theory diagrams of matching network in the receiving system that provides of the embodiment of the invention;
Fig. 4 is the receiving system partial circuit schematic diagram that the embodiment of the invention provides;
Fig. 5 is the flow chart of the method for reseptance that provides of the embodiment of the invention.
Embodiment
Be illustrated in figure 2 as the embodiment of the invention a kind of receiving system is provided, this receiving system comprises receiving front-end unit 10 and processing unit 20, receiving system receives first frequency band signals and second frequency band signals, also can be understood as, the shared receiving system of first frequency band signals and second frequency band signals also can be a shared receive path;
Wherein, receiving front-end unit 10 comprises first filter 101, second filter 102 and matching network 103; In embodiments of the present invention, first filter 101 is used for the signal of first frequency range is carried out filtering, and second filter 102 is used for the signal of second frequency range is carried out filtering; Matching network 103 is connected respectively with first filter 101 and second filter 102, is used for first filter, 101 filtered first frequency band signals and second filter, 102 filtered second frequency band signals are realized impedance matching simultaneously; Also can be understood as the shared same matching network 103 of first frequency band signals after the Filtering Processing and second frequency band signals.
Processing unit 20 is used for the signal by matching network 103 is received processing.
Wherein, can comprise in the receiving front-end unit 10: LNA, SP2T, the 3rd filter, the 4th filter, and matching network; Can also comprise: power supply circuits, biasing circuit, filter circuit etc.
Wherein, above-mentioned first filter, 101, the second filters, 102, the three filters, perhaps the 4th filter can be SAW, has saved the space on the receiving system (as mobile phone) on a lot of degree.
In this implementation column, matching network can be with reference to circuit structure shown in Figure 3, certainly, the circuit structure of matching network can also have a variety of, circuit structure shown in Figure 3 is just wherein a kind of, do not limit in the present invention, only need satisfy the signal of this matching network and first filter, the output of second filter and realize that simultaneously impedance matching gets final product.
In an embodiment of the present invention, this matching network comprises three resistance and an electric capacity, wherein, the two ends of electric capacity are electrically connected respectively with an end of two resistance respectively, the other end of two resistance that are connected with electric capacity is electrically connected respectively with the two ends of the 3rd resistance respectively, reference as shown in Figure 3, the first resistance L1, the second resistance L2, the 3rd resistance L3, and capacitor C, the two ends of capacitor C are electrically connected with the end of the first resistance L1 and the second resistance L2 respectively, and the other end of the first resistance L1 and the second resistance L2 is electrically connected respectively with the two ends of the 3rd resistance respectively.
In the present embodiment, the first resistance L1 can be electrically connected with the output of first filter respectively with the electric connection point of the 3rd resistance L3 with the electric connection point and the second resistance L2 of the 3rd resistance L3, in the present embodiment, the output of first filter can comprise two output ports, the first resistance L1 is electrically connected with one of them output port of first filter with the electric connection point of the 3rd resistance L3, the second resistance L2 is electrically connected with another output port of first filter with the electric connection point of the 3rd resistance L3, hence one can see that, and the signal of the output output of first filter can enter matching network;
The first resistance L1 can also be electrically connected with the output of second filter respectively with the electric connection point of the 3rd resistance L3 with the electric connection point and the second resistance L2 of the 3rd resistance L3, in the present embodiment, the output of second filter comprises two output ports, the first resistance L1 is electrically connected with one of them output port of second filter with the electric connection point of the 3rd resistance L3, the second resistance L2 is electrically connected with another output port of second filter with the electric connection point of the 3rd resistance L3, hence one can see that, and the signal of the output output of second filter can enter matching network;
As from the foregoing, the signal of first filter and the output of second filter output can enter matching network, i.e. the signal of first filter and second filter output output can shared same matching network.
In the present embodiment, the first resistance L1 on the matching network, the second resistance L2, the 3rd resistance L3, the value that reaches capacitor C is adjustable, makes this matching network and first, second frequency band signals realize impedance matching simultaneously by adjusting these device values; In the present embodiment, if be first frequency band signals and be second frequency band signals from the signal of first filter output, make this matching network and first, second frequency band signals realize impedance matching simultaneously by adjusting these device values again from the signal of second filter output.
In the present embodiment, the first resistance L1 is electrically connected with processing unit respectively with the electric connection point of capacitor C with the electric connection point and the second resistance L2 of capacitor C.
Need to prove, the signal of the signal of first filter output in the present embodiment and the output of second filter can shared same matching network, the concrete syndeton of the matching network that this is shared and first filter, second filter and processing unit can be as shown in Figure 4, also can be other structure, should not be construed restriction herein the embodiment of the invention.The value of each circuit devcie is adjustable on the matching network, make this matching network and first, second frequency range realize impedance matching simultaneously by adjusting these device values, overcome in the prior art first matching network and second matching network and realized impedance matching with first, second frequency range respectively, must be with first, second frequency range two class signals separately by two SP2T.
It will be appreciated that above-mentioned first frequency range can be the AWS frequency range, second frequency range can be the PCS frequency range.
The LNA that receiving front-end unit 10 comprises, SP2T, power supply circuits, biasing circuit, the structure of parts such as filter circuit, annexation, and the effect of in this receiving system, bringing into play can with prior art in identical, in conjunction with Fig. 1 a, Fig. 1 b can learn easily, not describe in detail herein.Processing unit 20 comprises the chip of 60x5 platform at least, and processing unit 20 specifically can be 6055 chips, and pin D23 and E23 are used to receive the PCS in-band signal in this chip, perhaps are used to receive the AWS in-band signal.Can also comprise as the circuit between impedance matching network and processing unit 20 among Fig. 4 and to be used for impedance inverter circuit, can be that line impedance is changed to 100 ohm by 50 ohm, this impedance inverter circuit is same as the prior art, and concrete understanding please refer to prior art.
By the above-mentioned receiving system explanation that the embodiment of the invention is provided, in this receiving system by matching network after to first filter filtering first frequency band signals and second frequency band signals behind second filter filtering realize impedance matching simultaneously, thereby make the shared same matching network of first frequency band signals and second frequency band signals, the signal that carries out impedance matching is imported into and receives processing in the processing unit.This matching network replaces first, second matching network in the prior art, thereby reduced the quantity of matching network in the prior art, but also do not need to re-use two SP2T, reduced the quantity of device on the HF link, reduced the insertion loss of receiving system, improve receiving sensitivity, saved cost simultaneously.
It will be appreciated that also this receiving system can be specially the CDMA receiving system.
The embodiment of the invention also provides a kind of method of reseptance, and as shown in Figure 5, method is applied to first frequency band signals and the shared receiving system of second frequency band signals, also can be understood as and is applied to the CDMA receiving system, and method comprises:
Step S500 receives first frequency band signals and second frequency band signals; In the present embodiment, first frequency range is an advanced wireless service frequency range, and second frequency range is the personal communication service frequency range.
Step S502 carries out Filtering Processing to first frequency band signals and second frequency band signals; In the present embodiment, can distinguish Filtering Processing to first frequency band signals and second frequency band signals by SAW (Surface Acoustic Wave) filter.
Step S504 realizes impedance matching simultaneously by first frequency band signals and second frequency band signals of same matching network after to Filtering Processing; Also can be understood as the shared same matching network of first frequency band signals after the Filtering Processing and second frequency band signals.
Step S506 receives processing to the signal after the impedance matching.
By the above-mentioned method of reseptance that the embodiment of the invention is provided, realize impedance matching simultaneously by first frequency band signals and second frequency band signals of a matching network after to Filtering Processing, thereby make the shared same matching network of first frequency band signals and second frequency band signals, the letter that carries out after the impedance matching is received processing, even matching network replaces in the prior art first, second matching network, thereby reduced the quantity of matching network in the prior art, but also do not need to re-use two SP2T, reduced the quantity of device on the HF link, reduced the insertion loss of receiving system, improve receiving sensitivity, saved cost simultaneously.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding equipment of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. receiving system, described device comprises: receiving front-end unit and processing unit, it is characterized in that when described receiving system receives first frequency band signals and second frequency band signals, described receiving front-end unit comprises: first filter, second filter and matching network;
Wherein, described first filter is used for described first frequency band signals is carried out filtering;
Described second filter is used for described second frequency band signals is carried out filtering;
Described matching network is connected respectively with described first filter and second filter, is used for second frequency band signals behind first frequency band signals behind described first filter filtering and described second filter filtering is realized impedance matching simultaneously;
Described processing unit is used to receive through the signal behind the described matching network and handles.
2. receiving system according to claim 1 is characterized in that, described first frequency range is an advanced wireless service frequency range, and described second frequency range is the personal communication service frequency range.
3. receiving system according to claim 1 is characterized in that, described receiving system is a CDMA receiving device.
4. receiving system according to claim 1 is characterized in that, described first filter is a SAW (Surface Acoustic Wave) filter, and perhaps described second filter is a SAW (Surface Acoustic Wave) filter.
5. a method of reseptance is characterized in that, described method is applied to first frequency band signals and the shared receiving system of second frequency band signals, and described method comprises:
Receive first frequency band signals and second frequency band signals;
Described first frequency band signals and second frequency band signals are carried out Filtering Processing;
Realize impedance matching simultaneously by first frequency band signals and second frequency band signals of same matching network after to described Filtering Processing;
Signal after the described impedance matching is received processing.
6. method of reseptance according to claim 5 is characterized in that, described first frequency range is an advanced wireless service frequency range, and described second frequency range is the personal communication service frequency range.
7. method of reseptance according to claim 5 is characterized in that, described receiving system is a CDMA receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010131616A CN101814928A (en) | 2010-03-23 | 2010-03-23 | Receiving device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010131616A CN101814928A (en) | 2010-03-23 | 2010-03-23 | Receiving device and method |
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| CN101814928A true CN101814928A (en) | 2010-08-25 |
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| CN201010131616A Pending CN101814928A (en) | 2010-03-23 | 2010-03-23 | Receiving device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420625A (en) * | 2011-11-23 | 2012-04-18 | 中兴通讯股份有限公司 | Matching circuit, matching circuit network and signal transmit-receive device |
| CN105376352A (en) * | 2014-08-29 | 2016-03-02 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN105591660A (en) * | 2014-10-23 | 2016-05-18 | 展讯通信（上海）有限公司 | Radio frequency transceiver and mobile terminal |
| CN115485977A (en) * | 2021-03-31 | 2022-12-16 | 华为技术有限公司 | Signal transmission method, device, storage medium and chip system |
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| CN1507164A (en) * | 2002-12-11 | 2004-06-23 | 富士康(昆山)电脑接插件有限公司 | RF front-end circuit |
| US20080273579A1 (en) * | 2007-05-02 | 2008-11-06 | Broadcom Corporation, A California Corporation | Programmable antenna assembly and applications thereof |
| CN101340601A (en) * | 2008-08-15 | 2009-01-07 | 北京航空航天大学 | Measurement receiver for digital television |
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2010
- 2010-03-23 CN CN201010131616A patent/CN101814928A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507164A (en) * | 2002-12-11 | 2004-06-23 | 富士康(昆山)电脑接插件有限公司 | RF front-end circuit |
| US20080273579A1 (en) * | 2007-05-02 | 2008-11-06 | Broadcom Corporation, A California Corporation | Programmable antenna assembly and applications thereof |
| CN101340601A (en) * | 2008-08-15 | 2009-01-07 | 北京航空航天大学 | Measurement receiver for digital television |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420625A (en) * | 2011-11-23 | 2012-04-18 | 中兴通讯股份有限公司 | Matching circuit, matching circuit network and signal transmit-receive device |
| CN102420625B (en) * | 2011-11-23 | 2014-04-30 | 中兴通讯股份有限公司 | Matching circuit, matching circuit network and signal transmit-receive device |
| CN105376352A (en) * | 2014-08-29 | 2016-03-02 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN105376352B (en) * | 2014-08-29 | 2019-11-26 | 展讯通信（上海）有限公司 | Mobile terminal |
| CN105591660A (en) * | 2014-10-23 | 2016-05-18 | 展讯通信（上海）有限公司 | Radio frequency transceiver and mobile terminal |
| CN115485977A (en) * | 2021-03-31 | 2022-12-16 | 华为技术有限公司 | Signal transmission method, device, storage medium and chip system |
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Application publication date: 20100825 |