CN100574140C - Adopt the TD-SCDMA amplifier of radio-frequency switch array - Google Patents
Adopt the TD-SCDMA amplifier of radio-frequency switch array Download PDFInfo
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- CN100574140C CN100574140C CNB200610069912XA CN200610069912A CN100574140C CN 100574140 C CN100574140 C CN 100574140C CN B200610069912X A CNB200610069912X A CN B200610069912XA CN 200610069912 A CN200610069912 A CN 200610069912A CN 100574140 C CN100574140 C CN 100574140C
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Abstract
The present invention relates to a kind of TD-SCDMA amplifier that adopts radio-frequency switch array, it is characterized in that: comprise input stage filter and output stage filter, input stage circulator and output stage circulator, radio-frequency switch array, RF Amplifier Module; It is characterized in that: the upward signal link connects the output stage filter, is connected to the output stage circulator, is connected to one group of electronic switch in the radio-frequency switch array; The downstream signal link connects the input stage filter, is connected to the input stage circulator, is connected to another group electronic switch in the radio-frequency switch array; The input of RF Amplifier Module is connected to an electronic selection switch in the radio-frequency switch array, the other end of electronic selection switch respectively with the upward signal link in electronic switch and an electronic switch in the downstream signal link be connected; The output of RF Amplifier Module is connected to another electronic selection switch in the radio-frequency switch array, the other end of electronic selection switch respectively with the upward signal link in another electronic switch and another electronic switch in the downstream signal link be connected.This installs reliable operation, and input cost is low, but not only the up-downgoing switched system of simple realization repeater is synchronous, and can realize up and the shared same set of radio frequency amplification link of downstream signal.
Description
Technical field:
The present invention relates to a kind of TD-SCDMA amplifier that adopts radio-frequency switch array.
Background technology:
TD-SCDMA is one of 3G (Third Generation) Moblie air interface technical specification of the formal issue of ITU, it has obtained comprehensive support of CWTS and 3GPP, it is China Telecom's first complete communication technology standard over 100 years, it is the alternative scheme of UTRA-FDD, be to integrate technical advantages such as CDMA, TDMA, power system capacity is big, the availability of frequency spectrum is high, antijamming capability is strong mobile communication technology, it has adopted technology such as smart antenna, joint-detection, synchronization CDMA, multi-slot, variable spread spectrum system, adaptive power adjustment.
The spreading rate of TD-SCDMA is 1.2Mc/s, and the carrier frequency bandwidth is 1.6MHz, and its descending and up information is to transmit on the different time-gap of same frequency, and Fig. 1 is the frame assumption diagram of TD-SCDMA.Frame structure is divided into the subframe of two 5ms with the radio frames of 10ms, and 7 conventional time slots and 3 special time slots are arranged in each subframe, and three special time slots are respectively descending pilot frequency time slot DwPTS, protection time slot GP and uplink pilot time slot UpPTS.7 conventional time slots are respectively TS0, TS1, TS2, TS3, TS4, TS5, TS6.Wherein TS0 always distributes to down link, and TS1 always distributes to up link.Separate by transfer point between ascending time slot and the descending time slot.In TD-SCDMA, the subframe of each 5ms has two transfer points: first transfer point is from the down link to the up link, the GP of position between DwPTS and UpPTS, and first transfer point was fixed with respect to the time started of each subframe; Second transfer point is from the up link to the down link.Decide at different uplink and downlink timeslot proportion relations according to the needs of network the position, and second transfer point is variable in system.
In the TD-SCDMA system, uplink signal and down link signal are in same frequency, distinguish uplink and downlink by time-multiplexed mode.Therefore the TD-SCDMA repeater need obtain the positional information of two transfer points and parameter constantly, realizes that the up-downgoing of its radio frequency link is switched, thus reach with system synchronously.On principle, up and downstream signal can amplify by shared same radio frequency link.Yet at present, for the repeater on the common meaning, upward signal is amplified by different radio frequency links respectively with downstream signal, obviously is a kind of waste to radio frequency hardware resources like this.
Summary of the invention
The objective of the invention is for a kind of TD-SCDMA amplifier and control method thereof that adopts radio-frequency switch array is provided, this device has high reliability, advantages such as low-cost input, the up-downgoing switched system that not only can realize the repeater is synchronous, and can uplink and downlink signals be amplified shared same radio frequency amplification link.
TD-SCDMA amplifier of the present invention comprises input stage filter and output stage filter, input stage circulator and output stage circulator, radio-frequency switch array, RF Amplifier Module; It is characterized in that: the upward signal link connects the output stage filter, is connected to the output stage circulator, is connected to one group of electronic switch in the radio-frequency switch array; The downstream signal link connects the input stage filter, is connected to the input stage circulator, is connected to another group electronic switch in the radio-frequency switch array; The input of RF Amplifier Module is connected to an electronic selection switch in the radio-frequency switch array, the other end of electronic selection switch respectively with the upward signal link in electronic switch and an electronic switch in the downstream signal link be connected; The output of RF Amplifier Module is connected to another electronic selection switch in the radio-frequency switch array, the other end of electronic selection switch respectively with the upward signal link in another electronic switch and another electronic switch in the downstream signal link be connected.
Above-mentioned RF Amplifier Module comprises the low noise amplifying unit, power amplification unit, frequency-selecting unit, lock unit.
The frequency range of above-mentioned amplification link is the TD-SCDMA system spectrum that country does not have committee's planning: i.e. (1), 1900-1920MHz (on/descending shared), 2010-2025MHz (on/descending shared); Or (2), 1850-1910MHz (on/descending shared), 1930-1990MHz (on/descending shared); Or (3), 1910-1930MHz (on/descending shared); (4), 1880-1900MHz (on/descending shared), 2300-2400MHz (on/descending shared).
The control method of the TD-SCDMA amplifier of above-mentioned employing radio-frequency switch array is by the control signal of lock unit output, and radio-frequency switch array is carried out periodic Control, makes RF Amplifier Module pass through up and downlink radio-frequency signal respectively in different time sections.Concrete steps are as follows:
A, input/output signal is carried out filtering, do not need to suppress the interference signal of amplifying by the TD-SCDMA filter;
B, input signal is branched into up radiofrequency signal and downlink radio-frequency signal, respectively the input radio frequency switch arrays by circulator;
C, lock unit output synchronous control signal are controlled in real time to the on off state of radio-frequency switch array;
D, by to the switch combination of radio-frequency switch array, make radio frequency amplify link and amplify up and downstream signal respectively in the different time periods;
Key point of the present invention is the switch combination of radio-frequency switch array, and the reasonable arrangement on sequential reaches the ideal value that physical isolation and time isolates, and makes the efficient operation of whole amplification link, avoids occurring the vibration or the crosstalk phenomenon of whole link.
Remarkable advantage of the present invention is this device reliable operation, and input cost is low, but and the up-downgoing switched system of simple realization repeater synchronous, make the shared same set of radio frequency of up and downstream signal amplify link.
Description of drawings
Fig. 1 is the frame assumption diagram of TD-SCDMA.
Fig. 2 is the operation principle schematic diagram that the present invention adopts the TD-SCDMA amplifier of radio-frequency switch array.
Fig. 3 is the structure principle chart that the present invention adopts the TD-SCDMA amplifier of radio-frequency switch array.
Embodiment
The embodiment of TD-SCDMA amplifier of the present invention is as shown in Figure 2: use common amplifier by making radio-frequency (RF) switch and cooperating of duplexer the uplink and downlink signal, the solid arrow among the figure be descending oppositely, dotted arrow be up oppositely.This link comprises input stage filter and output stage filter, input stage circulator and output stage circulator, radio-frequency switch array, RF Amplifier Module; It is characterized in that: the upward signal link connects the output stage filter, is connected to the output stage circulator, is connected to one group of electronic switch in the radio-frequency switch array; The downstream signal link connects the input stage filter, is connected to the input stage circulator, is connected to another group electronic switch in the radio-frequency switch array; The input of RF Amplifier Module is connected to an electronic selection switch in the radio-frequency switch array, the other end of electronic selection switch respectively with the upward signal link in electronic switch and an electronic switch in the downstream signal link be connected; The output of RF Amplifier Module is connected to another electronic selection switch in the radio-frequency switch array, the other end of electronic selection switch respectively with the upward signal link in another electronic switch and another electronic switch in the downstream signal link be connected.
When amplifying downstream signal, radio-frequency (RF) switch 1 closure, radio-frequency (RF) switch 2 be to radio-frequency (RF) switch 1 closure, and radio-frequency (RF) switch 3 is to radio-frequency (RF) switch 4 closures, radio-frequency (RF) switch 4 closures, and radio-frequency (RF) switch 5 is opened with radio-frequency (RF) switch 6 simultaneously.When amplifying upward signal, radio-frequency (RF) switch 5 closures, radio-frequency (RF) switch 2 are to radio-frequency (RF) switch 5 closures, and radio-frequency (RF) switch 3 is to radio-frequency (RF) switch 6 closures, and radio-frequency (RF) switch 1 is opened with radio-frequency (RF) switch 4 simultaneously.
Before the radio-frequency (RF) switch action, link must reach system synchronization.In the system synchronization search procedure, amplifier module is in the closed condition.After keeping synchronously, by the action of synchronization module output synchronous control signal control radio-frequency (RF) switch.
As can be seen from Figure 2, radio frequency link is when amplifying downstream signal (solid arrow direction), must guarantee the link no-self excitation to the radio-frequency (RF) switch of upward signal direction (dotted arrow direction) and the isolation of circulator, in like manner, radio frequency link must guarantee the link no-self excitation to the radio-frequency (RF) switch of downstream signal direction (solid arrow direction) and the isolation of circulator when amplifying upward signal (dotted arrow direction).
Link amplification coefficient (gain G) is 90dB, wherein single-pole single-throw switch (SPST) (radio-frequency (RF) switch 1, radio-frequency (RF) switch 4, radio-frequency (RF) switch 5, radio-frequency (RF) switch 6) isolation＞50dB, single-pole double-throw switch (SPDT) (radio-frequency (RF) switch 2 and radio-frequency (RF) switch 3) isolation＞30dB, binodal circulator isolation＞40dB.Isolation between such two links reaches 50+30+40=120dB, greater than link gain 30dB, guarantees the link no-self excitation.
Claims (4)
1. a TD-SCDMA amplifier that adopts radio-frequency switch array comprises input stage filter and output stage filter, input stage circulator and output stage circulator, radio-frequency switch array, RF Amplifier Module; It is characterized in that: the upward signal link connects the output stage filter, and described output stage filter is connected to the output stage circulator, and described output stage circulator is connected to first group of electronic switch in the radio-frequency switch array; The downstream signal link connects the input stage filter, and described input stage filter is connected to the input stage circulator, and described input stage circulator output is connected to second group of electronic switch in the radio-frequency switch array; The input of described RF Amplifier Module is connected to first electronic selection switch in the radio-frequency switch array, the in addition two ends of described first electronic selection switch respectively with the upward signal link in first electronic switch and second electronic switch in the downstream signal link be connected; The output of RF Amplifier Module is connected to second electronic selection switch in the radio-frequency switch array, the in addition two ends of described second electronic selection switch respectively with the upward signal link in the 3rd electronic switch and the quadrielectron switch in the downstream signal link be connected.
2. the TD-SCDMA amplifier of employing radio-frequency switch array according to claim 1 is characterized in that: the RF Amplifier Module of this link comprises the low noise amplifying unit, power amplification unit, frequency-selecting unit, lock unit.
3. the TD-SCDMA amplifier of employing radio-frequency switch array according to claim 1 and 2 is characterized in that: the frequency range of this amplification link does not have the TD-SCDMA system spectrum of committee's planning for country: i.e. (1), 1900-1920MHz, 2010-2025MHz; Or (2), 1850-1910MHz, 1930-1990MHz; Or (3), 1910-1930MHz; (4), 1880-1900MHz, 2300-2400MHz.
4. the TD-SCDMA amplifier of employing radio-frequency switch array according to claim 2, it is characterized in that: this radio frequency amplifies the control signal of link by lock unit output, radio-frequency switch array is carried out periodic Control, make RF Amplifier Module pass through up and downlink radio-frequency signal respectively in different time sections.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200610069912XA CN100574140C (en) | 2006-10-23 | 2006-10-23 | Adopt the TD-SCDMA amplifier of radio-frequency switch array |
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| CNB200610069912XA CN100574140C (en) | 2006-10-23 | 2006-10-23 | Adopt the TD-SCDMA amplifier of radio-frequency switch array |
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| CN100574140C true CN100574140C (en) | 2009-12-23 |
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| CN101938291A (en) * | 2010-08-19 | 2011-01-05 | 三维通信股份有限公司 | Device for transceiver radio frequency link |
| CN103916864B (en) * | 2013-01-04 | 2017-09-29 | 中国移动通信集团公司 | A kind of wireless discharging-directly station and its transmission signal method |
| EP3031140B1 (en) | 2013-08-08 | 2019-04-17 | Telefonaktiebolaget LM Ericsson (publ) | Low noise amplifier module and method of implementation |
| CN103684646B (en) * | 2013-12-05 | 2016-08-31 | 上海华为技术有限公司 | A kind of time division multiplex system and the method for common-use tunnel |
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Owner name: CHINA YOUKE COMMUNICATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: FUJIAN YOUKE COMMUNICATION TECHNOLOGY CO., LTD. |
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Address after: 350001, No. 6, 1, Science Park, Cangshan District, Fujian, Fuzhou Patentee after: China Youke Communication Technology Co., Ltd. Address before: 350001, No. 6, 1, Science Park, Cangshan District, Fujian, Fuzhou Patentee before: Fujian Youke Communication Technology Co., Ltd. |