CN102684757A - Signal processing circuit and related communication method - Google Patents
Signal processing circuit and related communication method Download PDFInfo
- Publication number
- CN102684757A CN102684757A CN2011100561163A CN201110056116A CN102684757A CN 102684757 A CN102684757 A CN 102684757A CN 2011100561163 A CN2011100561163 A CN 2011100561163A CN 201110056116 A CN201110056116 A CN 201110056116A CN 102684757 A CN102684757 A CN 102684757A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- coupled
- antenna
- node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Transceivers (AREA)
Abstract
The invention discloses a signal processing circuit and a related communication method. According to one of the embodiments, the signal processing circuit comprises a first node coupled to a first antenna, a second node coupled to a second antenna, a third node for receiving and sending a first signal transmitted by a circuit, a fourth node coupled to a receiving circuit, a signal splitting circuit, a phase-shift circuit and a signal coalition circuit; the signal splitting circuit is used for splitting the first signal into a secondary signal and a third signal and transmitting the secondary signal to the first antenna; the phase-shift circuit is used for changing the phase position of the third signal so as to generate a fourth signal; the fourth signal can be used for offsetting at least one part of a coupling signal between the third node and the fourth node; and the signal coalition circuit is used for consolidating the fourth signal and a fifth signal received by the second antenna and transmitting the consolidated signal to the receiving circuit.
Description
Technical field
The present invention relates to a kind of signal processing circuit, relate in particular to a kind of signal processing circuit that is used for many antenna wireless communication device.
Background technology
In wireless communication system, can use a plurality of antenna transmission to reach space diversity (space diversity) and multiple-input and multiple-output (multiple-input-multiple-output, function such as MIMO), and can effectively promote system effectiveness.For example, support the device of IEEE 802.11n or Long Term Evolution industry standards such as (long term evolution), adopted a plurality of antennas that the function of multiple-input and multiple-output is provided.
Yet, use a plurality of antennas also possibly bring negative influence.For example, the signal that some antennas sent can be coupled to another antenna, noise when becoming the receiving circuit processing signals or interference signal.Therefore, when using a plurality of antenna, the excessive usefulness that can reduce system on the contrary of the signal that is coupled between antenna.
In some device, can be through increasing the distance between antenna, perhaps through using isolator devices such as (isolator), the influence of lowering coupled signal.Yet modern electronic equipment not only volume is simplified, and often needs to integrate more assembly, and the influence of coupled signal certainly will be more serious, and the usefulness of system is more worsened.Because the spendable space of electronic equipment is limited, the distance that increases between antenna is also infeasible.On the other hand, isolator not only need take many spaces, and the frequency range of isolator is limited, usually enough isolation features can't be provided.
Summary of the invention
Therefore, how in the communicator of many antennas, design the apparatus and method of the influence that can reduce coupled signal, be the difficult problem that industry is suffered from for a long time always.
This specification provides a kind of embodiment of signal processing circuit, includes: a first node, in order to be coupled to one first antenna; One Section Point is in order to be coupled to one second antenna; One the 3rd node is in order to receive one first signal that a transtation mission circuit is transmitted; One demultiplexing circuit is coupled to this first node and the 3rd node, in order to being a secondary signal and one the 3rd signal with this first Signal Separation, and this secondary signal is sent to this first antenna; One phase-shift circuit is coupled to this demultiplexing circuit, in order to the phase place that changes the 3rd signal to produce one the 4th signal; One adder is coupled to this phase-shift circuit and this Section Point, in order to merge the 4th signal and one the 5th signal that received of this second antenna certainly; And one the 4th node, in order to the 5th signal is sent to a receiving circuit, wherein the 4th signal can be in order to offset at least a portion of the 3rd node and the 4th an internodal coupled signal.
This specification provides a kind of embodiment of communication means in addition, includes: with one first Signal Separation is a secondary signal and one the 3rd signal; This secondary signal is sent to one first antenna; The phase place that changes the 3rd signal is to produce one the 4th signal; Receive one the 5th signal from one second antenna; Merge the 4th signal and the 5th signal; And at least a portion of using the coupled signal between this first antenna of the 4th signal cancellation and this second antenna.
This specification provides a kind of embodiment of communicator in addition, includes: a first node, in order to be coupled to one first antenna; One Section Point is in order to be coupled to one second antenna; One the 3rd node is in order to couple a transtation mission circuit; One the 4th node is in order to couple a receiving circuit; An and signal processing circuit; Be coupled to this first, this second, the 3rd and the 4th node; In order to receive from this transtation mission circuit one first signal, with this first Signal Separation be a secondary signal and one the 3rd signal, the phase place that changes the 3rd signal with produce one the 4th signal, merge the 4th signal and certainly one the 5th signal that received of this second antenna and will merge after signal be sent to this receiving circuit, wherein the 4th signal can be in order to offset at least a portion of the 3rd node and the 4th an internodal coupled signal.
One of advantage of previous embodiment is that the plant bulk of this kind reduction coupled signal is simplified, and can be applicable to the more applications environment.
Another advantage of previous embodiment is that the device of this kind reduction coupled signal is easy to adjustment, can be adjusted to only setting to different application.
Description of drawings
Fig. 1 is the functional block diagram after an embodiment of communicator of the present invention simplifies.
Fig. 2 is the functional block diagram after an embodiment of demultiplexing circuit among Fig. 1 simplifies.
Fig. 3 is the functional block diagram after another embodiment of demultiplexing circuit simplifies among Fig. 1.
Fig. 4 is the functional block diagram after another embodiment of demultiplexing circuit simplifies among Fig. 1.
The primary clustering symbol description
100 communicators, 120,140 antennas
160 signal processing circuits, 162 demultiplexing circuits
164 phase-shift circuits, 166 adders
170 transtation mission circuits, 190 receiving circuits
211,212,213,311-316,411-416 electric capacity
221,222,321,322,421-424 inductance
231,331,431 resistance
Embodiment
Below will cooperate correlative type that embodiments of the invention are described.In these were graphic, identical label was represented identical or similar assembly.In the middle of specification and follow-up claim, use some vocabulary to censure specific assembly, having common knowledge the knowledgeable in the affiliated field should understand, and possibly have different nouns and be used for calling same assembly.This specification and follow-up claim not with the difference of title as the mode of distinguishing assembly, but with the difference of assembly on function as the benchmark of distinguishing.Be open term mentioned " comprising ... " in the middle of specification and the follow-up claim in the whole text, should be construed to " comprise but be not limited to ... ".In addition, " couple " speech and comprise any indirect connection means that directly reach.Therefore; Be coupled to second device if describe first device in the literary composition; Then represent first device can directly connect (comprising), or be connected to second device through other device or the intersegmental electrical or signal that connects of connection hand in second device through signal connected modes such as electric connection, wire/wireless transmission or optical delivery.
Fig. 1 is the functional block diagram after the simplification of multi-antenna communication device 100 of one embodiment of the invention.Communicator 100 includes antenna 120 and 140, signal processing circuit 160, transtation mission circuit 170 and receiving circuit 190.Signal processing circuit 160 includes demultiplexing circuit 162, phase-shift circuit 164 and adder 166.For for purpose of brevity, omit other assembly and annexation among Fig. 1.
As shown in Figure 1, communicator 100 sends signal St through antenna 120, and receives signal Sr by antenna 140.Transtation mission circuit 170 is sent to demultiplexing circuit 162 with signal S0.In addition, coupled signal Sc representation signal S0 is coupled to the part of receiving circuit 190 by transtation mission circuit 170.The coupled signal Sc that is drawn among Fig. 1 is merely and is easy to explanation; In fact; Signal S0 can via antenna 120 and 140 on antenna, through transtation mission circuit 170 and receiving circuit 190 earth terminal (ground), or through other coupling path, and be coupled to receiving circuit 190 by transtation mission circuit 170.
In one embodiment, phase-shift circuit 164 uses resistor capacitor circuit (resistor-capacitor circuit), and signal S1 is produced needed phase change to produce signal S2.In another embodiment, phase-shift circuit 164 can use one or more transmission line, and the modes such as circuit of perhaps using passive component and/or driving component to form produce needed phase change to produce signal S2 to signal S1.
In one embodiment, adder 166 directly couples the transmission path of signal S2 and signal Sr, so that signal S2 and signal Sr are merged into signal S3.In another embodiment, adder 166 converts signal S2 and/or signal Sr into after the suitable form (for example, converting voltage form or current forms etc. into) earlier, and the signal after will changing is again merged into signal S3.
In one embodiment, the phase difference between the signal value of coupled signal Sc and coupled signal Sc and signal S0 can be measured in low interference or glitch-free laboratory, perhaps learns through software emulation.The signal value signalization split circuit 162 of the coupled signal Sc that measurement or simulation capable of using obtained; Coupled signal Sc that utilization is measured or simulation is obtained and the phase difference between signal S0 are provided with phase-shift circuit 164; Signal S2 is spent to the phase difference of 225 degree for having identical in fact signal value and about 135 with coupled signal Sc, and can reduce or offset the influence that coupled signal Sc is caused.In another embodiment, can be set to have identical in fact signal value by signal S2, and signal S2 is set to have with coupled signal Sc the phase difference of 180 degree with coupled signal Sc.
In another embodiment, communicator 100 sends signal St through antenna 140, and receives signal Sr by antenna 120.Transtation mission circuit 170 is coupled to antenna 140 to send signal St, and receiving circuit 190 is coupled to antenna 120 to receive signal Sr.
In another embodiment; If transtation mission circuit 170 and 190 of receiving circuits have a plurality of coupling paths; According to measuring or the signal value of the coupled signal Sc that simulation is obtained and the phase difference between coupled signal Sc and signal S0; Communicator 100 can use signal processing circuit 160 or use other signal processing circuit, with the coupled signal that reduces or offset 190 of transtation mission circuit 170 and receiving circuits to influence that system effectiveness was caused.For example,, can use signal processing circuit 160 to produce corresponding offseting signal, to reduce or to offset the influence that coupled signal is caused at receiving circuit 190 to the coupled signal of two coupling paths if when desire is eliminated the coupled signal of two coupling paths.In another embodiment, can use a plurality of signal processing circuits to produce offseting signal, with the influence that reduces or counteracting coupled signal Sc is caused at receiving circuit 190 corresponding to coupled signal Sc.
Fig. 2 is the functional block diagram after an embodiment of demultiplexing circuit 162 among Fig. 1 simplifies.In the embodiment of Fig. 2, use Wilkinson demultiplexing circuit (Wilkinson power dividing circuit) to realize local or whole function of demultiplexing circuit 162.As shown in the figure, demultiplexing circuit 162 includes electric capacity 211,212 and 213, inductance 221 and 222, and resistance 231.Demultiplexing circuit 162 is coupled to transtation mission circuit 170, antenna 120 and phase-shift circuit 164, to receive and to transmit corresponding signal respectively.
In one embodiment; The signal value that the signal value of coupled signal Sc is about signal S0 (for example; Magnitude of voltage, current value etc.)
so demultiplexing circuit 162 fraction (equally splitting) Wilkinson demultiplexing circuit such as can adopt, signal S0 is separated into the signal St and the S1 of two identical in fact sizes.For example; When near the frequency receiving and transmitting signal of communicator 100 2.4GHz; This moment, the electric capacity 211,212 and 213 of demultiplexing circuit 162 can be set to about 1.9pF, 1.0pF and 1.0pF respectively; Inductance 221 and 222 can be set to about 4.6nH, and resistance 216 can be set to about 100ohm, to produce the signal St and the S1 of two identical in fact sizes.
In another embodiment; The signal value of coupled signal Sc can adopt less than
of the signal value of signal S0 so demultiplexing circuit 162 and not wait fraction (unequally splitting) Wilkinson demultiplexing circuit, signal S0 is separated into the signal St and the S1 of two sizes that are different in essence.In some preferred embodiments, the signal value of the signal S1 that demultiplexing circuit 162 produces can be set to
between the signal value of signal S0 to 1/100.
Fig. 3 is the functional block diagram after another embodiment of demultiplexing circuit 162 simplifies among Fig. 1.In the embodiments of figure 3, user tropism's coupler circuit (directional coupler circuit) is realized local or whole function of demultiplexing circuit 162, produces signal St and S1 with basis signal S0.Demultiplexing circuit 162 in the present embodiment includes six electric capacity 311-316, inductance 321 and 322, and resistance 331.
Fig. 4 is the functional block diagram after another embodiment of demultiplexing circuit 162 simplifies among Fig. 1.In the embodiment of Fig. 4, use Combination coupler circuit (hybrid coupler circuit) to realize local or whole function of demultiplexing circuit 162, produce signal St and S1 with basis signal S0.Demultiplexing circuit 162 in the present embodiment includes six electric capacity 411-416, four inductance 421-424, and resistance 431.
Above diagram and embodiment have simplified to be easy to explanation, are not the claim in order to limitation the present invention.For example, circuit 160,162,164,166,170 and/or 190 can use one or more circuit to realize that communicator 100 also can include variations such as more antenna and corresponding circuits.
In aforesaid different embodiment, the numerical value of the passive component of demultiplexing circuit 162 can be considered and in addition suitable setting according to different design.For example, according to the required demands such as frequency range of the frequency of the size of coupled signal Sc, the frequency of sending signal and frequency range, reception signal and frequency range and/or demultiplexing circuit 162, and the numerical value of corresponding adjustment passive component.Therefore, circuit designers can be adjusted to only setting with demultiplexing circuit 162 to different application environments.
Because the circuit that signal processing circuit 160 can only use passive component (for example, electric capacity, resistance and/or inductance etc.) to be formed is realized, therefore can reduce shared area.In addition, consider according to design such as the size of coupled signal and required frequency range, can be through the suitable numerical value that passive component is set, and obtain required signal processing circuit 160, therefore have bigger design flexibility.Signal processing circuit 160 also can merge and use with other the mode (for example, isolator and increase distance between antenna etc.) of removal coupling effect, to promote system effectiveness.
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (16)
1. signal processing circuit includes:
One first node is in order to be coupled to one first antenna;
One Section Point is in order to be coupled to one second antenna;
One the 3rd node is in order to receive one first signal that a transtation mission circuit is transmitted;
One demultiplexing circuit is coupled to said first node and said the 3rd node, in order to being a secondary signal and one the 3rd signal with said first Signal Separation, and said secondary signal is sent to said first antenna;
One phase-shift circuit is coupled to said demultiplexing circuit, in order to the phase place that changes said the 3rd signal to produce one the 4th signal;
One adder is coupled to said phase-shift circuit and said Section Point, in order to one the 5th signal that merges said the 4th signal and received from said second antenna; And one the 4th node, in order to said the 5th signal is sent to a receiving circuit,
Wherein, said the 4th signal can be in order to offset at least a portion of said the 3rd node and the said the 4th an internodal coupled signal.
2. signal processing circuit according to claim 1; Wherein, the signal value of said the 4th signal is that the signal value of said first signal
is to 1/100.
3. signal processing circuit according to claim 1, wherein, said the 4th signal has identical in fact signal value with said coupled signal.
4. signal processing circuit according to claim 1, wherein, the phase difference of said the 4th signal and said coupled signal is between between 135 degree to 225 degree.
5. signal processing circuit according to claim 1, wherein, said demultiplexing circuit include a Wilkinson demultiplexing circuit, a directional coupler circuit and a Combination coupler circuit at least one of them.
6. signal processing circuit according to claim 1, wherein, said phase-shift circuit includes one or more transmission line and/or one or more resistor capacitor circuit.
7. communication means includes:
With one first Signal Separation is a secondary signal and one the 3rd signal;
Said secondary signal is sent to one first antenna;
The phase place that changes said the 3rd signal is to produce one the 4th signal;
Receive one the 5th signal from one second antenna;
Merge said the 4th signal and said the 5th signal; And
Use at least a portion of the coupled signal between said first antenna of said the 4th signal cancellation and said second antenna.
8. communication means according to claim 7, other includes:
The signal value of said the 4th signal is set to
of signal value of said first signal to 1/100.
9. communication means according to claim 7, other includes:
Said the 4th signal is set to have identical in fact signal value with said coupled signal.
10. communication means according to claim 7, other includes:
The phase difference of said the 4th signal and said coupled signal is set between between 135 degree to 225 degree.
11. communication means according to claim 7, wherein, the flow process of separating said first signal includes in addition:
Utilize a Wilkinson demultiplexing circuit, a directional coupler circuit and a Combination coupler circuit at least one of them, be said secondary signal and said the 3rd signal with said first Signal Separation.
12. communication means according to claim 7, wherein, the flow process that changes the phase place of said the 3rd signal includes in addition:
Utilize one or more transmission line and/or one or more resistor capacitor circuit, the phase place that changes said the 3rd signal is to produce said the 4th signal.
13. a communicator includes:
One first node is in order to be coupled to one first antenna;
One Section Point is in order to be coupled to one second antenna;
One the 3rd node is in order to couple a transtation mission circuit;
One the 4th node is in order to couple a receiving circuit; And
One signal processing circuit; Be coupled to said first, said second, the said the 3rd and said the 4th node; In order to receive from said transtation mission circuit one first signal, with said first Signal Separation be a secondary signal and one the 3rd signal, the phase place that changes said the 3rd signal with produce one the 4th signal, merge said the 4th signal and from one the 5th signal that said second antenna is received and the signal after will merging be sent to said receiving circuit
Wherein, said the 4th signal can be in order to offset at least a portion of said the 3rd node and the said the 4th an internodal coupled signal.
14. communicator according to claim 13; Wherein, the signal value of said the 4th signal is that the signal value of said first signal
is to 1/100.
15. communicator according to claim 13, wherein, said the 4th signal has identical in fact signal value with said coupled signal.
16. communicator according to claim 13, wherein, the phase difference of said the 4th signal and said coupled signal is between between 135 degree to 225 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110056116.3A CN102684757B (en) | 2011-03-08 | Signal processing circuit and relevant communication means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110056116.3A CN102684757B (en) | 2011-03-08 | Signal processing circuit and relevant communication means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102684757A true CN102684757A (en) | 2012-09-19 |
| CN102684757B CN102684757B (en) | 2016-12-14 |
Family
ID=
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0905914A2 (en) * | 1997-08-27 | 1999-03-31 | Shin-A Telecom | Apparatus for cancelling radio frequency interference between transmitting antenna and receiving antenna, repeating system and transmitting and receiving system using the same |
| EP0957587A2 (en) * | 1998-05-13 | 1999-11-17 | Lucent Technologies Inc. | Method and apparatus to reduce transmitter overload in a transmit scanning receiver |
| CN1513231A (en) * | 2001-06-18 | 2004-07-14 | ض� | Method and device for passive interference cancellation |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0905914A2 (en) * | 1997-08-27 | 1999-03-31 | Shin-A Telecom | Apparatus for cancelling radio frequency interference between transmitting antenna and receiving antenna, repeating system and transmitting and receiving system using the same |
| EP0957587A2 (en) * | 1998-05-13 | 1999-11-17 | Lucent Technologies Inc. | Method and apparatus to reduce transmitter overload in a transmit scanning receiver |
| CN1513231A (en) * | 2001-06-18 | 2004-07-14 | ض� | Method and device for passive interference cancellation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106537689B (en) | For sending and receiving the transceiver apparatus and method of electromagnetic signal in mimo systems | |
| US7983645B2 (en) | Method and device for radio reception using a plurality of antennas | |
| CN106571538B (en) | Antenna assembly, antenna control method and electronic equipment | |
| CN102576932A (en) | Antenna and terminal | |
| US20120207235A1 (en) | Signal processing circuit and method thereof | |
| WO2013143604A1 (en) | Transmission system | |
| US9337534B2 (en) | Method and device for radio reception using an antenna tuning apparatus and a plurality of antennas | |
| EP3905552B1 (en) | Radio-frequency channel correcting method and apparatus, antenna, and base station | |
| US8019304B2 (en) | Communication system for WiFi and WiMAX signal transmission | |
| JP2013172172A (en) | Decoupling circuit | |
| WO2019013812A1 (en) | Antenna ports including switch type radio frequency connectors | |
| US20170201008A1 (en) | Mobile terminal | |
| CN103051363A (en) | Multiple-input multiple-output wireless communication system with expansion module | |
| CN104092026A (en) | Antenna transmission device, mobile terminal and antenna design method | |
| CN210899166U (en) | Radio frequency control circuit and electronic equipment | |
| CN102684757A (en) | Signal processing circuit and related communication method | |
| WO2023072153A1 (en) | Antenna control method and related device | |
| US20170201009A1 (en) | Mobile terminal and external antenna | |
| CN104113355A (en) | Electronic device | |
| CN102684757B (en) | Signal processing circuit and relevant communication means | |
| CN217363063U (en) | 5G NR frequency shift double-channel MIMO power self-balancing system | |
| CN105552520A (en) | Antenna and electronic terminal comprising same | |
| CN203675437U (en) | Circuit board and electronic device comprising same | |
| CN103887606B (en) | Antenna device and method for making antenna device | |
| KR102079436B1 (en) | Design of mimo system with uniform circular array over los channel and designing apparatus and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |