CN101505151B - Full frequency band frequency generator - Google Patents
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Abstract
The invention relates to a frequency generator for wireless communication systems. The frequency generator comprises a local oscillator for generating electronic signals, a driving frequency divider, a selector, a frequency mixer and the like, wherein the signals generated by the oscillator generate a plurality of intermediate frequencies through the frequency-dividing operation of the frequency divider; the selector and the frequency mixer can selectively mix the intermediate frequencies so as to generate fourteen frequencies; and needed orthogonal signals satisfying fourteen carrier frequencies or partial carrier frequencies of a UWB system are generated through division-by-two operation. The frequency generator generates the needed orthogonal signals at a frequency final-output end so as to turn the phase error and amplitude imbalance of the orthogonal signals into minimum but ensure hardware complexity and cost equivalent or superior to the prior proposal.
Description
Technical field
The present invention relates to the broadband RF communication system, particularly satisfy the frequency synthesizer field of MB-OFDM ultra broadband standard.
Background technology
Recent years, transfer of data research for two-forty in the short distance is very hot, countries such as America and Europe, Japan and China have opened 3～10GHz in succession and 60GHz freely licenses frequency range, and numerous enterprises and research institute of colleges and universities actively set up project, study the design of the silica-based circuit in the above-mentioned frequency range.This is wherein rapid with ultra broadband (UWB) technical development that works in 3～10GHz.
The wireless UWB technology is mainly used in and realizes short distance, superfast radio communication, and generally in 10m, transmission rate can reach 480Mbps even higher to its transmission range at present.UWB high transfer rate, low-power consumption and do not disturb the characteristics of existing wireless system make UWB become now and the focus in the coming five years.
FCC is that the spectral range that UWB divides is 3.1GHz～10.6GHz, and transmit power spectral density must not be greater than-41.2dBm/MHz.In view of the restriction of technology and the design difficulty of high frequency, initial interest concentrates on the application of 3.1GHz～4.9GHz.The Mb-ofdm ultra broadband of WiMedia alliance (hereinafter to be referred as MB-OFDM UWB) standard code, ofdm signal is become by 128 sub carrier group, and these carrier occupancies 528MHz is so subcarrier spacing is 4.125MHz.Because the carrier spacing is 4.125MHz, causing the OFDM symbol lengths must be 1/4.125e6=242.42ns.Consider intersymbol interference, preferably total OFDM symbol lengths is 312.5ns.5 band edges of 128 subcarriers are set to zero, thereby actual occupied bandwidth only is 507.375MHz (slightly being wider than desired 500MHz).
The UWB frequency spectrum is divided into 14 frequency bands from 3.1～10.6GHz, and each frequency band differs 528MHz, 14 carrier frequencies are arranged.These frequencies are further divided into groups, and every group has two or three adjacent frequency bands, see also shown in Figure 1.
So far, external research about MB-OFDM UWB frequency synthesizer can be divided into 3 classes basically: (1) each frequency all needs an independently PLL, and the switching between the frequency realizes by MUX; (2) only use 1 or 2 PLL, realize the generation of each required frequency by adopting frequency mixer, the switching between the last frequency realizes by MUX; (3) scheme is similar to (2), and difference has been to avoid the use of MUX, the substitute is Direct Digital Synthesizer (Direct Digital Synthesizer is called for short DDS) technology.
The most challenging part is a frequency synthesizer in the UWB design.This frequency synthesizer need can jump to another carrier wave from a carrier wave in 9.47ns when keeping spectral purity.
The phase-locked ring type frequency synthesizer that traditional dependence changes frequency dividing ratio realization frequency synthesis can't satisfy the requirement of Multiband UWB less than the 9ns frequency hopping time, can adopt the method for direct frequency synthesis: the frequency that promptly directly obtains each band by the method for mixing and frequency division, the frequency hopping time of this frequency combining method is only depended on the time of switch, can satisfy the fast frequency-hopped requirement of UWB.
And employed frequency mixer is generally monolateral band (Single SideBand is called for short SSB) frequency mixer in direct frequency combining method.The SSB frequency mixer also typically produces and contains the significantly output signal of " burr " (being the unwanted frequency composition) except having considerable area and energy requirement.When multichannel SSB frequency mixer was cascaded connection, unwanted burr composition was greatly improved.In addition, because once produce only single required frequency, be effective and stable in needs so requirement of system design is forced to guarantee emending frequency.
At present industrial quarters a kind of realize 14 carrier frequencies main stream approach as shown in Figure 2, the 16.896GHz signal that is produced by local phase-locked loop (not shown) produces 8.448GHz orthogonal differential signal through removing two-divider 201, this differential signal drives next stage and removes two-divider 202, this orthogonal differential signal drives the first MUX MUX 208 (Multiplexer is called for short MUX) simultaneously; 8.448GHz signal produces 4.224GHz orthogonal differential signal through removing two-divider 202, this differential signal drives next stage and removes two-divider 203, and this orthogonal differential signal drives the first MUX MUX 208 and the second MUX MUX 207 simultaneously; 4.224GHz signal produces 2.112GHz orthogonal differential signal through removing two-divider 203, this differential signal drives next stage and removes two-divider 204, and this orthogonal differential signal drives the second MUX MUX 207 simultaneously; 2.112GHz signal produces 1.056GHz orthogonal differential signal through removing two-divider 204, this differential signal drives next stage and removes two-divider 205, and this orthogonal differential signal drives the second MUX MUX 207 simultaneously; 1.056GHz signal produces 0.528GHz orthogonal differential signal through removing two-divider 205, this differential signal drives next stage respectively and removes two-divider 210 and produce 0.264GHz and 0.066GHz signal respectively except that eight frequency dividers 206, and this orthogonal differential signal drives a SSB frequency mixer 211 simultaneously; Another input of the one SSB frequency mixer 211 is in three frequencies of 4.224GHz, 2.112GHz, 1.056GHz of the second MUX MUX 207 output, and described frequency is selected decision by three road high-low levels of control end; The output of the one SSB frequency mixer 211 removes two-divider 212 through one and produces the orthogonal differential output signal, gives the 3rd MUX MUX 209; Another input of the 3rd MUX MUX 209 is the 0.264GHz signal that produces above; The output signal of the second MUX MUX 208 and the 3rd MUX MUX 209 is sent in the 2nd SSB frequency mixer 213, by carrying out frequency addition and reducing mutually, thereby finally produce 14 frequencies of orthogonal differential output, the concrete operations relation is seen the frequency inverted relation table of Fig. 7, no longer describes in detail.Such scheme is applied to satisfying the ECMA-368 standard-required in the Alereon AL5000 chip.The shortcoming of this scheme is that the accuracy of orthogonal signalling relies on single sideband mixer, and the mismatch of domain and the factors such as deviation of technology all may make the quadrature phase offset and the amplitude imbalance of carrier signal.And the orthogonal signalling of carrier wave is inaccurate, to increase design difficulty, the deterioration receiver performance of Direct Conversion Receiver on the one hand, also can influence transmitter performance on the other hand, make EVM value (Error Vector Magnitude is called for short EVM) be discontented with the pedal system requirement.
Therefore, be necessary very much to make frequency synthesizer to produce the carrier frequency of 14 quadratures output accurately, meanwhile power consumption and cost are lower, also satisfy frequency hopping time requirement fast.
Summary of the invention
Main purpose of the present invention is, a kind of full rate generator that is used for wireless communication system is provided.This full rate generator produces some intermediate frequencies by the divide operation of frequency divider, and selector and frequency mixer carry out optionally mixing operation with described intermediate frequency, thereby produces the orthogonal signalling that satisfy 14 required carrier frequencies of UWB system.
Another purpose of the present invention is, a kind of full rate generator that is used for wireless communication system is provided.This full rate generator produces some intermediate frequencies by the divide operation of frequency divider, selector and frequency mixer carry out optionally mixing operation with described intermediate frequency, can produce the part carrier frequency that satisfies in the UWB system, make the framework of full rate generator simplify.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of full frequency band frequency generator that the present invention proposes, be used to produce a plurality of carrier frequency frequencies of Mb-ofdm ultra broadband, this full frequency band frequency generator comprises: a phase-locked loop is used to produce a frequency signal; One multiphase filter receives described frequency signal, to produce an orthogonal frequency signal; One first frequency divider receives described frequency signal, to produce first fractional frequency signal; One first alternative MUX receives described orthogonal frequency signal and described first fractional frequency signal, selects signal to produce first; One second frequency divider receives described first fractional frequency signal, to produce second fractional frequency signal; One tri-frequency divider receives described second fractional frequency signal, to produce the three frequency division signal; One four-divider receives described three frequency division signal, to produce the 4th fractional frequency signal; One or three select a MUX, receive described second fractional frequency signal, and three frequency division signal and the 4th fractional frequency signal are selected signal to produce one second; One five frequency divider receives described the 4th fractional frequency signal, to produce the 5th fractional frequency signal; One the 6th frequency divider receives described the 5th fractional frequency signal, to produce the 6th fractional frequency signal; One first frequency mixer receives described second and selects signal and the 5th fractional frequency signal, to produce one first mixed frequency signal; One second alternative MUX receives described first mixed frequency signal and described the 5th fractional frequency signal, selects signal to produce one second; One second frequency mixer receives described first and selects signal and second to select signal, to produce second mixed frequency signal; One the 7th frequency divider receives described second mixed frequency signal, to produce the 7th fractional frequency signal.
Wherein said the 7th fractional frequency signal is one of 14 frequency signals of UWB system wanted carrier frequency.
Wherein said first frequency divider to the five frequency divider, and the 7th frequency divider is for removing two-divider, wherein the 6th frequency divider is for removing eight frequency dividers.
Wherein said the 6th fractional frequency signal compares as a feedback signal and a reference signal.
Wherein said phase-locked loop is further by described first frequency divider to the, six frequency dividers and phase frequency detector, loop filter, the voltage controlled oscillator formation that is connected in series successively.
Wherein said first frequency mixer and described second frequency mixer are single sideband mixer.
The object of the invention to solve the technical problems also can realize by the following technical solutions.According to the full frequency band frequency generator that the present invention proposes, this frequency generator comprises: a phase-locked loop is used to produce a frequency signal; One multiphase filter receives described frequency signal, to produce an orthogonal frequency signal; One frequency divider group receives described frequency signal, to produce first fractional frequency signal; One second frequency divider receives described first fractional frequency signal, to produce second fractional frequency signal; One first frequency mixer receives described first fractional frequency signal and described second fractional frequency signal carries out mixing, to produce first mixed frequency signal; One tri-frequency divider receives described second fractional frequency signal, to produce the three frequency division signal; One alternative MUX receives described first mixed frequency signal and described second fractional frequency signal, selects signal to produce one; One second frequency mixer receives described orthogonal frequency signal and described selection signal, to produce second mixed frequency signal; One four-divider receives described second mixed frequency signal, to produce the 4th fractional frequency signal.
Wherein said the 4th fractional frequency signal is one of 14 frequency signals of UWB system wanted carrier frequency.
Wherein said frequency divider group is removed the two-divider series connection by four and is constituted, and described second frequency divider and described four-divider are for removing two-divider, and described tri-frequency divider is for removing eight frequency dividers.
Wherein said frequency divider group is for removing 16 frequency dividers, and described second frequency divider and described four-divider are for removing two-divider, and described tri-frequency divider is for removing eight frequency dividers.
Wherein said three frequency division signal compares as a feedback signal and a reference signal.
Wherein said phase-locked loop is further by described frequency divider group, second frequency divider and tri-frequency divider and phase frequency detector, loop filter, the voltage controlled oscillator formation that is connected in series successively.
Wherein said first frequency mixer and described second frequency mixer are single sideband mixer.
By technique scheme, full rate generator of the present invention has following advantage at least:
This full rate generator can make the phase error of orthogonal signalling and amplitude imbalance become minimum, and on hardware complexity and cost with traditional scheme quite or more excellent.
In addition, the single sideband mixer in the full rate generator provided by the present invention has been saved a half circuit compared to frequency mixer of the prior art.This mainly be because, the load of single sideband mixer is generally the inductance capacitance resonant network, in integrated circuit, belong to the bigger element of area, and circuit complexity reduces half is exactly that the element that means circuit has reduced half to a certain extent, therefore reduced an area and power consumption all reduces half so area is corresponding, so full rate generator of the present invention can reduce half area and power consumption than the circuit of the full rate generator of prior art.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the corresponding frequency range of licensing with major country of the figure of the subband structure in the ECMA-368MB-OFDM UWB standard;
Fig. 2 is known MB-OFDM UWB receiver frequency synthesizer block diagram;
Fig. 3 is the frequency synthesizer block diagram of first embodiment that proposes of the present invention;
Fig. 4 is the frequencies operations relation table of SSB frequency mixer among Fig. 3;
Fig. 5 is the frequency synthesizer block diagram of second embodiment that proposes of the present invention.
Fig. 6 is the phase-locked loop block diagram that is used for the present invention first and second embodiment;
Fig. 7 is the frequencies operations relation table of SSB frequency mixer among Fig. 2;
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and the effect thereof of the wireless location method that foundation the present invention is proposed, describe in detail as after.
Figure 1 shows that the sub-band division figure of UWB, be divided into 14 frequency bands (band) from 3.1GHz to the 10.6GHz frequency range, these 14 frequency bands are divided into 6 frequency band groups again, and any two adjacent band separations have a baseband 528MHz, and the centre frequency of each frequency band group is f respectively
0(MHz)=3960 (frequency band group 1), 5544 (frequency band group 2), 7128 (frequency band groups 3), 8712 (frequency band groups 4), 10296 (frequency band groups 5).
With reference now to Fig. 3,, this circuit block diagram has been set forth 14 whole orthogonal carrier frequencies generators that can produce in corresponding 6 frequency bands grouping of UWB.The basis that frequency band produces is that the frequency hopping operation by defined in the ECMA-368MB-OFDM UWB standard occurs over just in each frequency band grouping that this is true and determine, so each only need produce constantly simultaneously, and two or three required carrier frequencies get final product in the frequency band grouping.The method that produces 14 frequencies has a lot.Can produce the required clock frequency of base band but an importance of the present invention is embodied in it, having generated accurately again simultaneously, orthogonal signalling directly offer radio-frequency front-end.For MB-OFDM UWB system, typical base band frequency is 528MHz or 1056MHz, and above-mentioned two frequencies can produce in structure of the present invention.
Fig. 3 shows first embodiment of frequency synthesizer structured flowchart of the present invention.This frequency synthesizer comprises: the phase-locked loop (not shown), 6 frequency dividers that are connected in series successively (promptly, first frequency divider, 301 to the 6th frequency dividers 306), one or three select a MUX 307, one first frequency mixer 308, alternative MUX 311,309, one second frequency mixers 310, one removes two-divider 313, and a multiphase filter 312.Wherein said 6 frequency dividers remove two-divider (301～305) and one by 5 and remove eight frequency dividers 306 and constitute, and the 7th frequency divider is for except that two-divider, and wherein said first frequency mixer 308 and second frequency mixer 310 are single sideband mixer.
In Fig. 3, the 16.896GHz signal that phase-locked loop (PLL) produces sends first frequency divider (Divider 2) 301 and polyphase filters (Poly-phase Filter, PPF) 312 simultaneously to.First frequency divider 301 produces the 8.448GHz signal, and this signal drives next stage second frequency divider 302, and its orthogonal signalling drive alternative MUX (Multiplexer, MUX) 311 simultaneously.Second frequency divider 302 produces the 4.224GHz signal, and this signal drives next stage tri-frequency divider 303, and its orthogonal signalling drive three and select a MUX 307 simultaneously.Tri-frequency divider 303 produces the 2.112GHz signal, and this signal drives next stage four-divider 304, and its orthogonal signalling drive 307 simultaneously.Four-divider 304 produces the 1.056GHz signal, and this signal drives next stage five frequency divider 305, and its orthogonal signalling drive 307 simultaneously.Five frequency divider 305 produces the 528MHz signal, and this signal drives next stage the 6th frequency divider 306 and produces the 66MHz signal, and its orthogonal signalling drive the alternative MUX 309 and first frequency mixer 308 simultaneously.
Three select a MUX 307 to bring in one that selects in output 4.224GHz, 2.112GHz, three frequencies of 1.056GHz by control, subtract each other and add operation mutually by first frequency mixer, 308 realization frequencies with the 528MHz signal, obtain 4.752GHz, 2.64GHz, three frequency signals of 1.584GHz by the phase Calais, obtain the 3.696GHz frequency signal by subtracting each other.Wherein said control end is controlled by control signal, be 3 position digital signals in the present embodiment, digital signal is high-low level and represents " 0 " and one state respectively herein, for example in the circuit of 1.8V power voltage supply, digital signal 0 " with " 1 " two states corresponding 0V and two kinds of DC level of 1.8V respectively; decide three output signals of selecting a MUX 307 correspondences by its different high-low level combining form; for example mode bit " 100 " expression selects first input signal of 307 as 307 output signal, second input signal of " 010 " expression selection 307 is as 307 output signal.
Alternative MUX 309 is exported to second frequency mixer 310 by one in control end selection 4.752GHz, 3.696GHz, 2.64GHz, 1.584GHz, five frequencies of 528MHz.Another input of second frequency mixer 310 derives from alternative MUX 311, wherein the input signal of alternative MUX 311 is respectively 16.896GHz and 8.448GHz orthogonal signalling, and the input of switching alternative MUX 311 by control end is selected.Wherein said control end is controlled by control signal, be 2 position digital signals in the present embodiment, digital signal is high-low level and represents " 0 " and one state respectively herein, for example in the circuit of 1.8V power voltage supply, digital signal 0 " with " 1 " two states corresponding 0V and two kinds of DC level of 1.8V respectively; decide the output signal of alternative MUX 311 correspondences by its different high-low level combining form; for example mode bit " 10 " expression selects first input signal of 311 as 311 output signal, second input signal of " 01 " expression selection 311 is as 311 output signal.Other alternative selector operation principle is similar with it.Because the 16.896GHz that local phase-locked loop produces not is orthogonal signalling, select polyphase filters 312 to produce the 16.896GHz orthogonal signalling among the present invention.
Second frequency mixer 310 is by frequency addition and 14 frequencies of reducing generation mutually.By 14 frequency drives next stage the 7th frequency divider 313 with above-mentioned generation, thus final 14 orthogonal carrier frequencies that satisfy the requirement of UWB radio-frequency front-end that produce.The concrete frequencies operations relation of second frequency mixer 310 sees also Fig. 4 table.Owing to do not need this moment second frequency mixer 310 to produce quadratures output, and second frequency mixer 310 is equivalent to a half circuit of corresponding single sideband mixer 213 among Fig. 2 in the present embodiment.This mainly be because, the load of single sideband mixer is generally the inductance capacitance resonant network, in integrated circuit, belong to the bigger element of area, and circuit complexity reduces half is exactly that the element that means circuit has reduced half to a certain extent, therefore reduced an area with power consumption all reduces half so area is corresponding, so the circuit structure of the single sideband mixer 310 in the present embodiment can reduce half area and power consumption than the circuit of correspondence among Fig. 2.
In addition, do not need 14 whole carrier frequencies in some UWB system, for example can only use the frequency band grouping (Group 3/4/5/6) of high band in European, Japanese and China.Under this situation, the framework of full rate generator can be simplified, so that only produce and satisfy needed frequency, for example first frequency mixer 308 and second frequency mixer 310 may only need to realize the frequency addition or subtract each other, three select a MUX 307 only to need to realize alternative operation etc., and this needs to decide in conjunction with concrete frequency grouping again.Perhaps circuit structure is not done change fully, unwanted part is closed by enabling control end, thereby save power consumption.
Figure 5 shows that the structured flowchart of the second embodiment of the present invention, on the basis of the structured flowchart of first embodiment,, produce the grouping of the 6th frequency band corresponding 3 mid-band frequency 7.656GHz, 8.712GHz and 8.712GHz through simplifying.
In Fig. 5, this frequency synthesizer comprises: the phase-locked loop (not shown), one frequency divider group 501, one first frequency divider 502, one second frequency divider 503, a SSB frequency mixer, 506, one alternative MUX 507, one second frequency mixer, 505, one tri-frequency dividers 508 and a multiphase filter 504.Wherein frequency divider group 501 is followed in series to form except that two-divider by four or constitutes by removing 16 frequency dividers, and wherein first frequency divider 502 and tri-frequency divider 508 are for removing two-divider, and second frequency divider 503 is for constituting except that eight frequency dividers.
The 16.896GHz signal that phase-locked loop produces sends frequency divider group 501 and polyphase filters (PPF) 504 simultaneously to, frequency divider group 501 produces the 1.056GHz signal, this signal drives first frequency divider 502, produce the 528MHz signal, this 528MHz signal drives next stage second frequency divider 503 and produces the 66MHz signal, first frequency mixer 506 carries out mixing with 1.056GHz signal and 528MHz signal, and these 528MHz orthogonal signalling drive the alternative MUX 507 and first frequency mixer 506.
Alternative MUX 507 is exported to second frequency mixer 505 by one in two frequencies of control end selection 1.584GHz, 528MHz.Another input of second frequency mixer 505 derives from the output of multiphase filter 504.Because the 16.896GHz that local phase-locked loop produces not is orthogonal signalling, select polyphase filters 504 to produce the 16.896GHz orthogonal signalling among the present invention.
Fig. 6 has shown the phase-locked loop structure that produces 16.896GHz signal among Fig. 3 and Fig. 5.This structure is made of phase frequency detector (PFDCP) 401, loop filter 402, voltage controlled oscillator (VCO) 403 and frequency divider, wherein frequency divider can be made up of to the 6th frequency divider first among Fig. 3, or by 501, the first frequency divisions, 502 devices of the frequency divider group among Fig. 5 and second frequency divider, 503 compositions.Wherein phase frequency detector 401 receives from a reference signal (REF) of local oscillator (not shown) generation and the fractional frequency signal of frequency divider generation, after relatively, send voltage controlled oscillator to via loop filter again, to produce described 16.896GHz signal.
According to the full rate generator that is used for wireless communication system provided by the invention.This full rate generator comprises that a local oscillator produces electronic signal, drives frequency divider, selector and frequency mixer etc.The signal that this oscillator produced produces some intermediate frequencies by the divide operation of frequency divider, and selector and frequency mixer can carry out optionally mixing operation to these intermediate frequencies then, thereby generates 14 frequencies.Produce the orthogonal signalling that satisfy 14 required carrier frequencies of UWB system by removing two operations at last.Generally speaking, the present invention uses a full rate generator (for example PLL etc.) and one or two single sideband mixer to produce 14 local oscillator signals, is used to receive the signal of communication of the respective sub-bands that takies a frequency bandwidth.According to above-mentioned embodiment, produce required orthogonal signalling at the final output of frequency, thereby make the phase error of orthogonal signalling and amplitude imbalance become minimum, and on hardware complexity and cost with traditional scheme quite or more excellent.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (11)
1. full frequency band frequency generator is used to produce a plurality of carrier frequency frequencies of Mb-ofdm ultra broadband, and this full frequency band frequency generator comprises:
One phase-locked loop is used to produce a frequency signal;
One multiphase filter receives described frequency signal, to produce an orthogonal frequency signal;
One first frequency divider receives described frequency signal, to produce first fractional frequency signal;
One first alternative MUX receives described orthogonal frequency signal and described first fractional frequency signal, selects signal to produce first;
One second frequency divider receives described first fractional frequency signal, to produce second fractional frequency signal;
One tri-frequency divider receives described second fractional frequency signal, to produce the three frequency division signal;
One four-divider receives described three frequency division signal, to produce the 4th fractional frequency signal;
One or three select a MUX, receive described second fractional frequency signal, and three frequency division signal and the 4th fractional frequency signal are selected signal to produce one second;
One five frequency divider receives described the 4th fractional frequency signal, to produce the 5th fractional frequency signal;
One the 6th frequency divider receives described the 5th fractional frequency signal, to produce the 6th fractional frequency signal;
One first frequency mixer receives described second and selects signal and the 5th fractional frequency signal, to produce one first mixed frequency signal;
One second alternative MUX receives described first mixed frequency signal and described the 5th fractional frequency signal, selects signal to produce one second;
One second frequency mixer receives described first and selects signal and second to select signal, to produce second mixed frequency signal;
One the 7th frequency divider receives described second mixed frequency signal, to produce the 7th fractional frequency signal;
Described the 7th fractional frequency signal is one of 14 frequency signals of UWB system wanted carrier frequency.
2. full frequency band frequency generator according to claim 1 is characterized in that: wherein said first frequency divider to the five frequency divider, and the 7th frequency divider is for removing two-divider, wherein the 6th frequency divider is for removing eight frequency dividers.
3. full frequency band frequency generator according to claim 1 is characterized in that: wherein said the 6th fractional frequency signal compares as a feedback signal and a reference signal.
4. full frequency band frequency generator according to claim 1 is characterized in that: wherein said phase-locked loop is further by described first frequency divider to the, six frequency dividers and phase frequency detector, loop filter, the voltage controlled oscillator formation that is connected in series successively.
5. full frequency band frequency generator according to claim 1 is characterized in that: wherein said first frequency mixer and described second frequency mixer are single sideband mixer.
6. full frequency band frequency generator is used to produce a plurality of carrier frequency frequencies of Mb-ofdm ultra broadband, and this frequency generator comprises:
One phase-locked loop is used to produce a frequency signal;
One multiphase filter receives described frequency signal, to produce an orthogonal frequency signal;
One frequency divider group receives described frequency signal, to produce first fractional frequency signal;
One second frequency divider receives described first fractional frequency signal, to produce second fractional frequency signal;
One first frequency mixer receives described first fractional frequency signal and described second fractional frequency signal carries out mixing, to produce first mixed frequency signal;
One tri-frequency divider receives described second fractional frequency signal, to produce the three frequency division signal;
One alternative MUX receives described first mixed frequency signal and described second fractional frequency signal, selects signal to produce one;
One second frequency mixer receives described orthogonal frequency signal and described selection signal, to produce second mixed frequency signal;
One four-divider receives described second mixed frequency signal, to produce the 4th fractional frequency signal;
Described the 4th fractional frequency signal is one of 14 frequency signals of UWB system wanted carrier frequency.
7. full frequency band frequency generator according to claim 6, it is characterized in that: wherein said frequency divider group is removed the two-divider series connection by four and is constituted, described second frequency divider and described four-divider are for removing two-divider, and described tri-frequency divider is for removing eight frequency dividers.
8. full frequency band frequency generator according to claim 6 is characterized in that: wherein said frequency divider group is for removing 16 frequency dividers, and described second frequency divider and described four-divider are for removing two-divider, and described tri-frequency divider is for removing eight frequency dividers.
9. full frequency band frequency generator according to claim 6 is characterized in that: wherein said three frequency division signal compares as a feedback signal and a reference signal.
10. full frequency band frequency generator according to claim 6, it is characterized in that: wherein said phase-locked loop is further by described frequency divider group, second frequency divider and tri-frequency divider and phase frequency detector, loop filter, the voltage controlled oscillator formation that is connected in series successively.
11. full frequency band frequency generator according to claim 6 is characterized in that: wherein said first frequency mixer and described second frequency mixer are single sideband mixer.
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| CN101867545B (en) * | 2010-05-31 | 2012-09-05 | 西安交通大学 | Frequency synthesizer of full-frequency range multi-band orthogonal frequency division multiplexing ultra-wideband radio frequency transceiver |
| CN104469991B (en) * | 2014-11-21 | 2018-01-16 | 北京佰才邦技术有限公司 | The method and device of wireless telecommunications |
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| CN111541449B (en) * | 2020-05-07 | 2023-08-15 | 江苏集萃智能集成电路设计技术研究所有限公司 | Ultra-wideband orthogonal local oscillator signal generating device |
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