CN101098549A - Signal receiving method and device and wireless multi-mode broadband receiving set - Google Patents
Signal receiving method and device and wireless multi-mode broadband receiving set Download PDFInfo
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- CN101098549A CN101098549A CNA200610090845XA CN200610090845A CN101098549A CN 101098549 A CN101098549 A CN 101098549A CN A200610090845X A CNA200610090845X A CN A200610090845XA CN 200610090845 A CN200610090845 A CN 200610090845A CN 101098549 A CN101098549 A CN 101098549A
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Abstract
A signal receiving method is used to receive a target signal, wherein the target signal is stored in a wideband signal. And the method comprises that first, receiving a wideband signal, then removing the target signal from the wideband signal to obtain an interference signal, then converting the interference signal into phase-reverse interference signal, at least, combinging the wideband signal and the phase-reverse interference signal to obtain a target signal.
Description
Technical field
The present invention is relevant for a kind of signal acceptance method and device and WiMAX multimode receiving system, and particularly relevant for a kind of high efficiency signal acceptance method and device and WiMAX multimode receiving system.
Background technology
Modern age, radio communication technology was with the development of speed very fast, became the digital communication system of a large amount of multimedia messagess of transmission that are tending towards complicated today more from the single simulation communication system high speed development that can only carry elementary audio signal and Word message in early days.In addition, diversified communication protocol also is established to meet diversified communicating requirement.Now, more welcome communication protocol for example has PHS, GSM, GPRS, WCDMA, CDMA2000 or WLAN etc. to be used by the whole world.Yet different communication protocols is used in most region, so people can't travel around the world and use the communicator of single communication agreement to communicate by letter with others.In order to overcome this non-convenience, so develop the multi-mode radio communication device that to use the different communication agreement.
The multi-mode radio communication device comprises a multi-mode wireless receiver, in order to receive the signal of communication with the different types under the agreement of demodulation different communication.The structure of multi-mode wireless receiver improves along with the development of technology, tradition needs intermediater-frequency stage (Intermediate Frequency Stage, IF stage) superhet (super heterodyne) or double change type (dual conversion) structure, be substituted by direct conversion (direct conversion) or zero intermediate frequency (zero IF) or Low Medium Frequency (Low IF) structure recently, the signal that receives is by directly from the radio frequency conversion to the fundamental frequency.Because skip over intermediater-frequency stage, directly transformational structure has less zero, assembly compared to two transformational structures.
Please refer to Fig. 1, it represents the calcspar of traditional multi-mode wireless receiver.Multi-mode wireless receiver 10 comprises antenna 12, wireless multi-mode broadband receiving set 14,90 degree phase difference demodulator (quadraturedemodulator) 16 and digital baseband processors 18.Antenna 12 is from the open space receiving wide-band signal, and broadband signal is sent to wireless multi-mode broadband receiving set 14.Wireless multi-mode broadband receiving set 14 is used for amplified broad band signal and filtration interference signal wherein, and for example noise to obtain echo signal, transmits echo signal to nine ten degree phase difference demodulators 16 then.90 degree phase difference demodulators 16 enter two 90 degree phase paths with the echo signal that is received from the radio frequency conversion to the fundamental frequency and with Signal Separation: I path and Q path.The I analog signal also changed respectively by 90 degree phase difference demodulators 16 and the Q analog signal is the digital object signal and is sent to digital baseband processor 18.Digital baseband processor 18 is handled the digital object signal further, to propose the entrained data of digital object signal.In addition, digital baseband processor 18 also provides control signal such as model selection, low noise amplifier gain controlling and demodulator gain controlling etc.
Please refer to Fig. 2, the structure chart of its expression conventional wireless multi-mode broadband receiving set.Wireless multi-mode broadband receiving set 14 comprises that antenna handover module 20 and receiving system handover module 26 transmit via corresponding path according to the communication protocol of echo signal with the broadband signal that guiding is received.Corresponding to each signal path, one band pass filter (210,220,230,244 or 254) is arranged filtering an interference signal and a low noise amplifier (212,222,232,242 or 252) respectively with the amplification target signal, echo signal will by and interference signal will be filtered.In addition, if echo signal is a WCDMA signal or a CDMA2000 signal, then echo signal needs synchronous driving and receiver, so the signal leakage current that needs a duplexer (duplexer) (240 or 250) to be transmitted to avoid is gone into receiver.
In addition, echo signal is positioned at the frequency band of band pass filter (210,220,230,244 or 254), and interference signal can be divided into interference signal and outer interference signal two classes of frequency band in the frequency band.The outer interference signal of frequency band is outside the frequency band of band pass filter (210,220,230,244 or 254) and be filtered.Interference signal is then within the frequency band of band pass filter (210,220,230,244 or 254) and can't be filtered in the frequency band.Because interference signal can for example be a low noise amplifier by active element in the frequency band, if interference signal is enough powerful in the frequency band, then interference signal can produce nonlinear distortion at active element in the frequency band.These distorted signals are understood target approach signal bands and are become noise, make the usefulness of multi-mode wireless receiver 10 reduce; And desirable high freguency bandpass filter be difficult to the design, cause engineer's puzzlement.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of signal acceptance method and device thereof and WiMAX multimode receiving system exactly, the conversion interference signal is anti-phase interference signal, and in conjunction with broadband signal to obtain echo signal, the nonlinear distortion that excludes the interference signal and produced, the usefulness performance that improves WiMAX multimode receiving system.
According to purpose of the present invention, a kind of signal acceptance method is proposed, in order to the receiving target signal, echo signal is present in the broadband signal.Signal acceptance method comprises, at first, and receiving wide-band signal.Then, in broadband signal, remove echo signal to obtain interference signal.Then, the conversion interference signal is anti-phase interference signal.At last, in conjunction with broadband signal and anti-phase interference signal to obtain echo signal.
According to purpose of the present invention, other proposes a kind of signal receiving device, and in order to the receiving target signal, echo signal is present in the broadband signal, and broadband signal has first bandwidth, and echo signal occupies one second bandwidth in broadband signal.Signal receiving device comprises circulator, band pass filter, anti-phase device and colligator.Circulator receiving wide-band signal, circulator have first output and second output.Band pass filter couples first output of circulator, makes the echo signal in the broadband signal pass through band pass filter, and the signal by band pass filter forms interference signal feed-in first output.Anti-phase device couples second output of circulator, receives interference signal and is converted to anti-phase interference signal from second output.Colligator with broadband signal and anti-phase interference signal in conjunction with to obtain echo signal.
According to purpose of the present invention, reintroduce a kind of wireless multi-mode broadband receiving set, comprise antenna handover module, first duplexer, second duplexer, receiving system handover module, signal receiving device and wideband low noise amplifier.Antenna handover module receiving wide-band signal, broadband signal comprises echo signal.First duplexer is couple to the antenna handover module.Second duplexer is couple to the antenna handover module.The receiving system handover module is couple to antenna handover module, first duplexer and second duplexer, in order to from antenna handover module, first duplexer or the second duplexer receiving wide-band signal.Signal receiving device is couple to the receiving system handover module, in order to take out echo signal and export target signal from broadband signal.Wideband low noise amplifier is couple to signal receiving device, is the amplification target signal in order to the amplification target signal.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows:
Description of drawings
Fig. 1 represents the calcspar of traditional multi-mode wireless receiver.
Fig. 2 represents the structure chart of conventional wireless multi-mode broadband receiving set.
Fig. 3 represents the flow chart according to the signal acceptance method of preferred embodiment of the present invention.
Fig. 4 represents the calcspar according to the signal receiving device of preferred embodiment of the present invention.
Fig. 5 represents the calcspar according to the wireless multi-mode broadband receiving set of preferred embodiment of the present invention.
Fig. 6 represents the calcspar according to the software set wireless receiver of another embodiment of the present invention.
The main element symbol description
10: the multi-mode wireless receiver
12,602: antenna
14: wireless multi-mode broadband receiving set
16: nine ten degree phase difference demodulators
18: the digital baseband processor
20,502,604: the antenna handover module
26,508: the receiving system handover module
210,220,230,244,254,410: band pass filter
212,222,232,242,252: low noise amplifier
240,250: duplexer
302-314: method flow
40: signal receiving device
402: local oscillator
404: the first frequency mixers
406: the first low pass filters
408: circulator
412: end device
414: the second frequency mixers
416: the second low pass filters
418: anti-phase device
420: colligator
50: wireless multi-mode broadband receiving set
504: the first duplexers
506: the second duplexers
510,606: wideband low noise amplifier
60: the software set wireless receiver
608: analog to digital converter
610: software set fundamental frequency processor
Embodiment
The invention provides a kind of signal acceptance method and device thereof and WiMAX multimode receiving system, in order to the conversion interference signal is anti-phase interference signal, and in conjunction with broadband signal to obtain echo signal, the nonlinear distortion that excludes the interference signal and produced, the usefulness performance that improves WiMAX multimode receiving system.
Please refer to Fig. 3, its expression is according to the flow chart of the signal acceptance method of preferred embodiment of the present invention.This signal acceptance method is used to receive an echo signal, and this echo signal is present in the broadband signal, and wherein, broadband signal has first bandwidth, and echo signal has second bandwidth, and first bandwidth is greater than second bandwidth.In addition, echo signal has a centre frequency in broadband signal.
At first, in step 302, receiving wide-band signal.Then, in step 304, according to a local oscillated signal with the broadband signal frequency reducing after the input one low pass filter, wherein the frequency of local oscillated signal is lower than the centre frequency that echo signal has in broadband signal.Afterwards, in step 306, via circulator (Circulator) input tape bandpass filter, the bandwidth that this band pass filter can pass through is greater than second bandwidth and less than first bandwidth with the output signal of low pass filter.Wherein, echo signal can be passed through band pass filter, and interference signal is the signal by band pass filter not.
Then, in step 308, the echo signal by band pass filter can be absorbed by the termination device that is coupled to band pass filter.Then, in step 310, interference signal is by the end output of circulator.Then, in step 312, according to local oscillated signal raising frequency interference signal, and will anti-phasely become anti-phase interference signal.At last, in step 314, in conjunction with broadband signal and anti-phase interference signal and obtain echo signal.
Please refer to Fig. 4, its expression is according to the calcspar of the signal receiving device of preferred embodiment of the present invention.Signal receiving device 40 is used for the receiving target signal, and echo signal is present in the broadband signal, and broadband signal has first bandwidth, and echo signal occupies second bandwidth in broadband signal, and first bandwidth is greater than second bandwidth.In addition, echo signal has a centre frequency in broadband signal.
Please refer to Fig. 5, its expression is according to the calcspar of the wireless multi-mode broadband receiving set of preferred embodiment of the present invention.Wireless multi-mode broadband receiving set 50 comprises antenna handover module 502, first duplexer 504, second duplexer 506, receiving system handover module 508, signal receiving device 40 and wideband low noise amplifier 510.Antenna handover module 502 is used for receiving wide-band signal, and broadband signal comprises an echo signal, and broadband signal has first bandwidth, and echo signal occupies second bandwidth in broadband signal, and first bandwidth is greater than second bandwidth.It is a WCDMA duplexer that first duplexer 504 is couple to antenna handover module 502, the first duplexers 504.It is a CDMA2000 duplexer that second duplexer 506 is couple to antenna handover module 502, the second duplexers 506.
Receiving system handover module 508 is couple to antenna handover module 502, first duplexer 504 and second duplexer 506, in order to from antenna handover module 502, first duplexer 504 or second duplexer, 506 receiving wide-band signals.Wherein, antenna handover module 502 and receiving system handover module 508 are according to the transfer path of echo signal decision broadband signal.Because WCDMA signal and synchronous driving of CDMA2000 signal demand and reception are a WCDMA signal so work as echo signal, then broadband signal is sent to receiving system handover module 508 via first duplexer 504.When echo signal is a CDMA2000 signal, broadband signal is sent to the receiving system handover module via second duplexer 506, otherwise antenna handover module 502 directly transmits broadband signal to receiving system handover module 508; This moment, the frequency of oscillation of local oscillator 402 also can selected echo signal and adjust.
Above-mentioned signal acceptance method and device thereof and WiMAX multimode receiving system, utilizing signal receiving device 40 conversion interference signals is anti-phase interference signal, and in conjunction with broadband signal to obtain echo signal, filter out all interference signals.Wherein, save a plurality of band pass filters and a plurality of low noise amplifier, reduce cost.And because the passband that the band pass filter in the signal receiving device sets is less, make all interference signals before entering wideband low noise amplifier, all be filtered, thus, the nonlinear distortion that can exclude the interference signal and on active element, to be produced, and do not have generating noise, improve the usefulness performance of WiMAX multimode receiving system 50, that is improve the usefulness performance of multi-mode wireless receiver.In addition, when total system did not have interference signal to exist, function that can the cut-off signals receiving system was to save power.
In addition, above-mentioned wireless multi-mode broadband receiving set 50 can also be applied to a software set wireless receiver.The software set wireless receiver can be under same hardware by software set to handle multiple communication protocol and band multiplex.The software set wireless receiver can be downloaded upgrading fast via simple software, and further finishes resetting of radio characteristics and function.The software set wireless receiver can be regarded a mobile phone, can also be as a radio network device downloading mail, or receive gps signal.In order to reach above-mentioned order ground, the wireless frequency end of software set wireless receiver has very large bandwidth and high sensitivity.
Please refer to Fig. 6, its expression is according to the calcspar of the software set wireless receiver of another embodiment of the present invention.Software set wireless receiver 60 comprises antenna 602, antenna handover module 604, signal receiving device 40, wideband low noise amplifier 606, analog to digital converter 608 and software set fundamental frequency processor 610.Antenna 602 and antenna handover module 604 are used for receiving wide-band signal.Signal receiving device 40 and wideband low noise amplifier 606 are used to reach the broadband demand to remove interference signal, and signal receiving device 40 passes through the height of local oscillator 402 adjustment frequencies of oscillation in order to the export target signal, wideband low noise amplifier 606 output amplification target signals.Analog to digital converter 608 is couple to wideband low noise amplifier 606, in order to being the digital object signal with the amplification target conversion of signals.Software set fundamental frequency processor 610 is couple to analog to digital converter 608, in order to the function by software set to receive the row operation of going forward side by side of digital object signal, to handle multiple communication protocol.
In sum; though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.
Claims (16)
1. a signal acceptance method is used to receive an echo signal, and this echo signal is present in the broadband signal, and this signal acceptance method comprises:
(A) receive this broadband signal;
(B) in this broadband signal, remove this echo signal to obtain an interference signal;
(C) changing this interference signal is an anti-phase interference signal; And
(D) reach this anti-phase interference signal to obtain this echo signal in conjunction with this broadband signal.
2. signal acceptance method as claimed in claim 1, this broadband signal have one first bandwidth, and this echo signal has one second bandwidth, and wherein this first bandwidth is greater than this second bandwidth.
3. signal acceptance method as claimed in claim 2, this step (B) comprising:
(B1) this broadband signal is imported a band pass filter, this echo signal is by this band pass filter, and wherein, this interference signal is not pass through the signal of this band pass filter.
4. signal acceptance method as claimed in claim 3, this step (B1) also comprises:
According to a local oscillated signal with this broadband signal frequency reducing after input one low pass filter frequently; And
The output signal of this low pass frequency filter is imported this band pass filter via a circulator, and wherein, this interference signal is via the end output of this circulator.
5. signal acceptance method as claimed in claim 3, this band pass filter couple one and end device, in order to absorb this echo signal.
6. signal acceptance method as claimed in claim 4 also comprises:
According to this local oscillated signal with this interference signal raising frequency, and anti-phase this anti-phase interference signal that becomes.
7. signal acceptance method as claimed in claim 6, this echo signal has a centre frequency in this broadband signal, and wherein the frequency of this local oscillated signal is lower than this centre frequency.
8. signal acceptance method as claimed in claim 3, wherein the bandwidth that can pass through of this band pass filter is greater than this second bandwidth and less than this first bandwidth.
9. a signal receiving device is used to receive an echo signal, and this echo signal is present in the broadband signal, and this broadband signal has one first bandwidth, and this echo signal occupies one second bandwidth in this broadband signal, and this signal receiving device comprises:
One circulator is used to receive this broadband signal, and this circulator has one first output and one second output;
One band pass filter couples first output of this circulator, makes this echo signal in this broadband signal by this band pass filter, and the signal by this band pass filter does not form this first output of an interference signal feed-in;
One anti-phase device couples second output of this circulator, receives this interference signal and is converted to an anti-phase interference signal from this second output; And
One colligator reaches this anti-phase interference signal combination to obtain this echo signal with this broadband signal.
10. signal receiving device as claimed in claim 9 also comprises:
One local oscillator is used to produce a local oscillated signal;
One first frequency mixer, according to this local oscillated signal with this broadband signal frequency reducing; And
One first low pass filter is couple to this first frequency mixer, receives this broadband signal, and exports this broadband signal to this circulator.
11. signal receiving device as claimed in claim 9 also comprises:
One ends device, is couple to this band pass filter, in order to absorb this echo signal.
12. signal receiving device as claimed in claim 9 also comprises:
One second frequency mixer is couple to this circulator, according to this local oscillated signal with this interference signal raising frequency; And
One second low pass filter receives this interference signal and exports this interference signal to this anti-phase device.
13. signal receiving device as claimed in claim 9, wherein the bandwidth that can pass through of this band pass filter is greater than this second bandwidth and less than this first bandwidth.
14. signal receiving device as claimed in claim 10, this echo signal has a centre frequency in this broadband signal, and wherein the frequency of this local oscillated signal is lower than this centre frequency.
15. a wireless multi-mode broadband receiving set comprises:
One antenna handover module is used to receive a broadband signal, and this broadband signal comprises an echo signal;
One first duplexer is couple to this antenna handover module;
One second duplexer is couple to this antenna handover module;
One receiving system handover module is couple to this antenna handover module, this first duplexer and this second duplexer, in order to receive this broadband signal from this antenna handover module, this first duplexer or this second duplexer;
One signal receiving device is couple to this receiving system handover module, in order to take out this echo signal from this broadband signal and to export this echo signal; And
One wideband low noise amplifier is couple to this signal receiving device, is an amplification target signal in order to amplify this echo signal.
16. wireless multi-mode broadband receiving set as claimed in claim 15, wherein, this broadband signal has one first bandwidth, and this echo signal occupies one second bandwidth in this broadband signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA200610090845XA CN101098549A (en) | 2006-06-26 | 2006-06-26 | Signal receiving method and device and wireless multi-mode broadband receiving set |
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| CNA200610090845XA CN101098549A (en) | 2006-06-26 | 2006-06-26 | Signal receiving method and device and wireless multi-mode broadband receiving set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843116A (en) * | 2012-07-16 | 2012-12-26 | 中兴通讯股份有限公司 | Wideband filter device and method for multimode receiver |
| WO2014161322A1 (en) * | 2013-07-25 | 2014-10-09 | 中兴通讯股份有限公司 | Apparatus and method for receiving wireless communication signal |
| TWI502926B (en) * | 2013-08-05 | 2015-10-01 | Hon Hai Prec Ind Co Ltd | Duplexer and cable modem using the duplexer |
-
2006
- 2006-06-26 CN CNA200610090845XA patent/CN101098549A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843116A (en) * | 2012-07-16 | 2012-12-26 | 中兴通讯股份有限公司 | Wideband filter device and method for multimode receiver |
| CN102843116B (en) * | 2012-07-16 | 2019-01-04 | 中兴通讯股份有限公司 | Wideband filtered device and method for multimode rake receiver |
| WO2014161322A1 (en) * | 2013-07-25 | 2014-10-09 | 中兴通讯股份有限公司 | Apparatus and method for receiving wireless communication signal |
| CN104348497A (en) * | 2013-07-25 | 2015-02-11 | 中兴通讯股份有限公司 | Wireless communication signal reception device and method |
| TWI502926B (en) * | 2013-08-05 | 2015-10-01 | Hon Hai Prec Ind Co Ltd | Duplexer and cable modem using the duplexer |
| US9479115B2 (en) | 2013-08-05 | 2016-10-25 | Hon Hai Precision Industry Co., Ltd. | Duplexer and cable modem using a duplexer |
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Open date: 20080102 |