CN101471662A - 6 to 8.2 GHz five-band frequency synthesizer for OFDM UWB - Google Patents
6 to 8.2 GHz five-band frequency synthesizer for OFDM UWB Download PDFInfo
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- CN101471662A CN101471662A CNA2007103042491A CN200710304249A CN101471662A CN 101471662 A CN101471662 A CN 101471662A CN A2007103042491 A CNA2007103042491 A CN A2007103042491A CN 200710304249 A CN200710304249 A CN 200710304249A CN 101471662 A CN101471662 A CN 101471662A
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Abstract
The invention discloses a 6-8.2 GHz five-band frequency synthesizer used for an OFDM UWB. The synthesizer comprises a first fixed-frequency phase-locked loop 1, a second fixed-frequency phase-locked loop, a multiple selector 3, a multiphase-dividing-two frequency divider 4 and a single sideband mixer 5. By adopting the direct frequency synthesis technique, the frequency synthesizer can output the local oscillator signals of the five bands frequency points of 6072 MHz, 6600 MHz, 7128 MHz, 7656 MHz and 8184 MHz; and the frequency hopping time between the frequency points at nanosecond level can be obtained, so that the demand of fast frequency hopping of the OFDM UWB communication system can be met. Moreover, IQ two-path local oscillator signals are output by the frequency synthesizer and can be applied to an UWB wireless transceiver with direct frequency conversion.
Description
Technical field
The present invention relates to OFDM (OFDM) wireless ultra-wideband (UWB) technical field, relate in particular to 6 to the 8.2GHz five-band frequency synthesizers of a kind of OFDM of being used for UWB.
Background technology
The UWB technology is mainly used in and realizes short distance, superfast radio communication, and generally in 10m, transmission rate can reach 480M/s 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.
The UWB technology has realized two quantum jumps, aspect spectrum division, starts " coexistence " situation; Aspect transmission speed, really to have moved towards at a high speed, it comes the raising capacity by increasing bandwidth, becomes important in wireless technology " at a high speed " change.
The UWB chipset will be widely used in enterprise intelligent office (IT), digital home entertainment (CE) and move and use (MC), and UWB chip and product have begun to enter high-end market, and according to the world market prediction, the market annual growth rate will be above 400%.And its growth momentum is accelerated now, and market is huge, and economic benefit is obvious, and prospect is very optimistic.
Frequency synthesizer is based on the important circuit module in the UWB transceiver of OFDM technology, also is the design difficulty of whole transceiver.Compare with the traditional narrow wireless communication system, the frequency synthesizer that is applied to UWB has following difficult point:
1, frequency height (being up to 10GHz);
2, frequency band range wide (several GHz magnitude);
3, frequency hopping speed fast (nanosecond order).
Based on above difficult point, adopt traditional phase-locked ring type frequency synthesizer can't satisfy the requirement of UWB communication system.
Summary of the invention
(1) technical problem that will solve
In view of this, main purpose of the present invention is to provide 6 to the 8.2GHz five-band frequency synthesizers of a kind of OFDM of being used for UWB, to improve frequency, frequency bandwidth and the frequency hopping speed of frequency synthesizer, satisfies the requirement of UWB communication system.
(2) technical scheme
For achieving the above object, the invention provides 6 to the 8.2GHz five-band frequency synthesizers of a kind of OFDM of being used for UWB, this frequency synthesizer comprises:
The first fixed frequency phase-locked loop 1, this first fixed frequency phase-locked loop is a reference frequency signal with the 66MHz signal, includes two 2 frequency dividers and one 27 frequency divider in the based on feedback link successively, exports stable 7128MHz orthogonal signalling to single sideband mixer 5;
The second fixed frequency phase-locked loop 2, this second fixed frequency phase-locked loop is a reference frequency signal with the 66MHz signal, include three 2 frequency dividers and one 8 frequency divider in the based on feedback link successively, in scaling-down process, produce stable 1056MHz orthogonal signalling and stable 2112MHz orthogonal signalling, and this 1056MHz and 2112MHz orthogonal signalling are exported to MUX 3 jointly;
MUX 3 is used for the 1056MHz and the 2112MHz orthogonal signalling that are received from the second fixed frequency phase-locked loop 2 are selected to export to leggy except that two-divider 4;
Leggy removes two-divider 4, and what be used for that signal with MUX 3 outputs carries out two divided-frequency and produce out of phase exports to single sideband mixer 5, adds deduct with control single sideband mixer 5;
Single sideband mixer 5, the 7128MHz orthogonal signalling that are used for being received from the first fixed frequency phase-locked loop 1 are removed the 528MHz orthogonal signalling of two-divider 4 or 1056MHz orthogonal signalling or DC signal and are carried out mixing with being received from leggy, obtain 6072MHz, 6600MHz, 7128MHz, 7656MHz and five positive blending output signals of 8184MHz.
In the such scheme, the described first fixed frequency phase-locked loop 1 adopts the orthogonal voltage-controlled vibrator (VCO) that directly produces the IQ two paths of signals, avoid adopting doubled frequency VCO to produce the method for orthogonal signalling then by two divided-frequency, thereby adopt the lower fixed frequency phase-locked loop of frequency.
In the such scheme, the described second fixed frequency phase-locked loop 2 has adopted the method for two divided-frequency to produce orthogonal signalling, thereby obtains good orthogonal signalling.
In the such scheme, described leggy removes the two divided-frequency signal that two-divider 4 can be exported out of phase, thereby the control single sideband mixer produces the signal that adds deduct.
In the such scheme, this frequency synthesizer produces the signal of needed each frequency by the method that adopts direct conversion, remove the signal that two-divider 4 is selected needs by MUX (3) and leggy then, frequency hopping speed between each frequency depends on the speed of switch, has realized the frequency hopping speed of nanosecond.
(3) beneficial effect
From technique scheme as can be seen, the present invention has following beneficial effect:
1, this 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention, adopt two fixed frequency phase-locked loops, a single sideband mixer, a MUX and a leggy to remove two-divider and produce five tunnel 6 to 8.2GHz UWB local oscillation signal, improve the frequency and the frequency hopping speed of frequency synthesizer, satisfied the requirement of UWB communication system.
2, this 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention have only been used a SSB frequency mixer, and what reduced that repeatedly mixing produced is spuious; Frequency hopping speed can reach nanosecond order, satisfies the UWB system requirements.
3, this 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention, produce the signal of needed each frequency by the way that adopts direct conversion, select the signal of needs then by a MUX, frequency hopping speed between each frequency just only depends on the switch speed of switch like this, can realize the frequency hopping speed of nanosecond fully, satisfy the requirement of UWB communication system.
4, this 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention, high frequency phase locked loop has adopted the quadrature VCO of direct generation IQ two paths of signals, needing to avoid design doubled frequency VCO to produce the method for orthogonal signalling then by two divided-frequency, thereby can adopt the lower PLL of frequency.
5, this 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention, low-frequency phase-locking ring adopt and produce the doubled frequency method generation orthogonal signalling of frequency division then, have improved the orthogonality that produces signal.
6, this 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention, thereby the output signal that has adopted leggy to remove two-divider generation out of phase is controlled adding deduct of single sideband mixer, has reduced the hardware cost of single sideband mixer.
Description of drawings
Fig. 1 is the structured flowchart of 6 to the 8.2GHz five-band frequency synthesizers of the OFDM of being used for UWB provided by the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 1, Fig. 1 is the structured flowchart of 6 to the 8.2GHz five-band frequency synthesizers of the OFDM of being used for UWB provided by the invention, and this frequency synthesizer comprises that the first fixed frequency phase-locked loop 1, the second fixed frequency phase-locked loop 2, MUX 3, leggy remove two-divider 4 and single sideband mixer 5.
Wherein, the first fixed frequency phase-locked loop 1, this first fixed frequency phase-locked loop is a reference frequency signal with the 66MHz signal, includes two 2 frequency dividers and one 27 frequency divider in the based on feedback link successively, exports stable 7128MHz orthogonal signalling to single sideband mixer 5.
The second fixed frequency phase-locked loop 2, this second fixed frequency phase-locked loop is a reference frequency signal with the 66MHz signal, include three 2 frequency dividers and one 8 frequency divider in the based on feedback link successively, in scaling-down process, produce stable 1056MHz orthogonal signalling and stable 2112MHz orthogonal signalling, and this 1056MHz and 2112MHz orthogonal signalling are exported to MUX 3 jointly.
MUX 3 is used for the 1056MHz and the 2112MHz orthogonal signalling that are received from the second fixed frequency phase-locked loop 2 are selected to export to leggy except that two-divider 4.
Leggy removes two-divider 4, and what be used for that signal with MUX 3 outputs carries out two divided-frequency and produce out of phase exports to single sideband mixer 5, adds deduct with control single sideband mixer 5.
Single sideband mixer 5, the 7128MHz orthogonal signalling that are used for being received from the first fixed frequency phase-locked loop 1 are removed the 528MHz orthogonal signalling of two-divider 4 or 1056MHz orthogonal signalling or DC signal and are carried out mixing with being received from leggy, obtain 6072MHz, 6600MHz, 7128MHz, 7656MHz and five positive blending output signals of 8184MHz.
The above-mentioned first fixed frequency phase-locked loop 1 adopts the quadrature VCO that directly produces the IQ two paths of signals, avoids adopting doubled frequency VCO to produce the method for orthogonal signalling then by two divided-frequency, thereby adopts the lower fixed frequency phase-locked loop of frequency; The second fixed frequency phase-locked loop 2 has adopted the method for two divided-frequency to produce orthogonal signalling, thereby obtains good orthogonal signalling.
Above-mentioned leggy removes the two divided-frequency signal that two-divider 4 can be exported out of phase, thereby the control single sideband mixer produces the signal that adds deduct; This frequency synthesizer produces the signal of needed each frequency by the method that adopts direct conversion, remove the signal that two-divider 4 is selected needs by MUX 3 and leggy then, frequency hopping speed between each frequency depends on the speed of switch, has realized the frequency hopping speed of nanosecond.
Refer again to Fig. 1, this frequency synthesizer has comprised following circuit module: the leggy that 7128MHz integer P LL (1), 4224MHz integer P LL (2), the MUX (3) of selecting 1056MHz and 2112MHz two paths of signals, realization 1056MHz and 2112MHz remove two divided-frequency removes two-divider (4), realizes the single sideband mixer (5) of 7128MHz and 528MHz or 1056MHz or DC mixing.
To provide concrete frequency synthesis scheme below:
What the PLL of 7128MHz (1) adopted is the crystal oscillator frequency of 66MHz, and frequency dividing ratio is 2 * 2 * 27, has finally produced the output of 66M * 2 * 2 * 27=7128MHz, and the VCO of this phase-locked loop adopts the quadrature VCO that can directly produce the IQ two paths of signals.
What the PLL of 4224MHz (2) adopted also is the crystal oscillator frequency of 66MHz, frequency dividing ratio is 2 * 2 * 2 * 8, the final output that produces 66M * 2 * 2 * 2 * 8=4224MHz, in the scaling-down process of this phase-locked loop, produced the signal of 1056MHz and 2112MHz, these two additional signals will provide input for leggy removes two-divider, and the selection of this two paths of signals is realized by a data selector (3).
Leggy removes two-divider (4) 1056MHz or the 2112MHz signal that MUX (3) provides is carried out two-divider generation 512MHz or 1056MHz signal, thereby and can provide the output signal of a plurality of phase places to control adding deduct of single sideband mixer.
With the input of 7128MHz signal as SSB Mixer, the another one input is for removing 528MHz or 1056MHz or the DC signal that two-divider (4) provides, afterwards can produce the signal that frequency is 6072MHz, 6600MHz, 7128MHz, 7656MHz and five bands of 8184MHz through single sideband mixing, finally remove the band signal that two-divider (4) is controlled needs generation by control MUX (3) and leggy.
This 6 to the 8.2GHz five-band frequency synthesizers that are used for OFDM UWB provided by the invention, by adopting direct frequency synthesis technique, can export the local oscillation signal of 6072MHz, 6600MHz, 7128MHz, 7656MHz, five bands frequencies of 8184MHz, and the frequency hopping time between each frequency can be satisfied the fast frequency-hopped requirement of OFDM UWB communication system at nanosecond order.
In addition, this frequency synthesizer has been exported IQ two-way local oscillation signal, can be applied in the UWB transceiver of Direct Conversion.
Above-described concrete embodiment has carried out further detailed explanation to purpose of the present invention, technical scheme and beneficial effect.Institute it should be understood that the above only for concrete embodiment of the present invention, is not limited to the present invention.All any modifications of being made within the spirit and principles in the present invention, be equal to and replace or improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1, a kind of 6 to 8.2GHz five-band frequency synthesizers that are used for the OFDM wireless ultra broadband is characterized in that this frequency synthesizer comprises:
The first fixed frequency phase-locked loop (1), this first fixed frequency phase-locked loop is a reference frequency signal with the 66MHz signal, include two 2 frequency dividers and one 27 frequency divider in the based on feedback link successively, export stable 7128MHz orthogonal signalling to single sideband mixer (5);
The second fixed frequency phase-locked loop (2), this second fixed frequency phase-locked loop is a reference frequency signal with the 66MHz signal, include three 2 frequency dividers and one 8 frequency divider in the based on feedback link successively, in scaling-down process, produce stable 1056MHz orthogonal signalling and stable 2112MHz orthogonal signalling, and this 1056MHz and 2112MHz orthogonal signalling are exported to MUX (3) jointly;
MUX (3) is used for the 1056MHz and the 2112MHz orthogonal signalling that are received from the second fixed frequency phase-locked loop (2) are selected to export to leggy except that two-divider (4);
Leggy removes two-divider (4), and what be used for that signal with MUX (3) output carries out two divided-frequency and produce out of phase exports to single sideband mixer (5), adds deduct with control single sideband mixer (5);
Single sideband mixer (5), the 7128MHz orthogonal signalling that are used for being received from the first fixed frequency phase-locked loop (1) are removed the 528MHz orthogonal signalling of two-divider (4) or 1056MHz orthogonal signalling or DC signal and are carried out mixing with being received from leggy, obtain 6072MHz, 6600MHz, 7128MHz, 7656MHz and five positive blending output signals of 8184MHz;
2,6 to the 8.2GHz five-band frequency synthesizers that are used for the OFDM wireless ultra broadband according to claim 1, it is characterized in that, the described first fixed frequency phase-locked loop (1) adopts the orthogonal voltage-controlled vibrator VCO that directly produces the IQ two paths of signals, avoid adopting doubled frequency VCO to produce the method for orthogonal signalling then by two divided-frequency, thereby adopt the lower fixed frequency phase-locked loop of frequency.
3,6 to the 8.2GHz five-band frequency synthesizers that are used for the OFDM wireless ultra broadband according to claim 1, it is characterized in that, the described second fixed frequency phase-locked loop (2) has adopted the method for two divided-frequency to produce orthogonal signalling, thereby obtains good orthogonal signalling.
4,6 to the 8.2GHz five-band frequency synthesizers that are used for the OFDM wireless ultra broadband according to claim 1, it is characterized in that, described leggy removes the two divided-frequency signal of two-divider (4) output out of phase, thereby the control single sideband mixer produces the signal that adds deduct;
5,6 to the 8.2GHz five-band frequency synthesizers that are used for the OFDM wireless ultra broadband according to claim 1, it is characterized in that, this frequency synthesizer produces the signal of needed each frequency by the method that adopts direct conversion, remove the signal that two-divider (4) is selected needs by MUX (3) and leggy then, frequency hopping speed between each frequency depends on the speed of switch, has realized the frequency hopping speed of nanosecond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103042491A CN101471662B (en) | 2007-12-26 | 2007-12-26 | 6 to 8.2 GHz five-band frequency synthesizer for OFDM UWB |
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| CN2007103042491A CN101471662B (en) | 2007-12-26 | 2007-12-26 | 6 to 8.2 GHz five-band frequency synthesizer for OFDM UWB |
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| CN101471662B CN101471662B (en) | 2012-06-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908900A (en) * | 2010-07-07 | 2010-12-08 | 复旦大学 | Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard |
| EP2333972A1 (en) * | 2009-12-10 | 2011-06-15 | Nxp B.V. | Electronic circuit frequency generation |
| WO2013037100A1 (en) * | 2011-09-13 | 2013-03-21 | 海能达通信股份有限公司 | Radio frequency synthesizer and transceiver |
| CN104270148A (en) * | 2014-08-21 | 2015-01-07 | 安徽白鹭电子科技有限公司 | Broadband digital fixed-amplitude multi-system radio frequency signal source module |
| CN107911111A (en) * | 2017-11-16 | 2018-04-13 | 北京遥感设备研究所 | A kind of S-band fast frequency hopping rate source based on phaselocked loop and matrix switch |
| CN111541449A (en) * | 2020-05-07 | 2020-08-14 | 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6822488B1 (en) * | 2000-07-31 | 2004-11-23 | Skyworks Solutions, Inc. | Frequency synthesizer |
| JP2007522726A (en) * | 2004-01-26 | 2007-08-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Multiband OFDM-based ultra-wideband radio frequency generation |
-
2007
- 2007-12-26 CN CN2007103042491A patent/CN101471662B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2333972A1 (en) * | 2009-12-10 | 2011-06-15 | Nxp B.V. | Electronic circuit frequency generation |
| US8198943B2 (en) | 2009-12-10 | 2012-06-12 | Nxp B.V. | Electronic circuit frequency generation |
| CN101908900A (en) * | 2010-07-07 | 2010-12-08 | 复旦大学 | Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard |
| CN101908900B (en) * | 2010-07-07 | 2013-01-02 | 复旦大学 | Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard |
| WO2013037100A1 (en) * | 2011-09-13 | 2013-03-21 | 海能达通信股份有限公司 | Radio frequency synthesizer and transceiver |
| CN104270148A (en) * | 2014-08-21 | 2015-01-07 | 安徽白鹭电子科技有限公司 | Broadband digital fixed-amplitude multi-system radio frequency signal source module |
| CN107911111A (en) * | 2017-11-16 | 2018-04-13 | 北京遥感设备研究所 | A kind of S-band fast frequency hopping rate source based on phaselocked loop and matrix switch |
| CN111541449A (en) * | 2020-05-07 | 2020-08-14 | 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 |
| 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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| CN101471662B (en) | 2012-06-06 |
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