CN102368694B - Equivalent interference source method for simulation of M3L-UE stray interference - Google Patents
Equivalent interference source method for simulation of M3L-UE stray interference Download PDFInfo
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- CN102368694B CN102368694B CN201110304737.9A CN201110304737A CN102368694B CN 102368694 B CN102368694 B CN 102368694B CN 201110304737 A CN201110304737 A CN 201110304737A CN 102368694 B CN102368694 B CN 102368694B
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Abstract
The invention discloses an equivalent interference source method for simulation of a stray interference of multi-mode multi-link UE (M3L-UE). The method comprises the following steps that: a normal working environment and a normal working condition of a plurality of radio communication links of M3L-UE, so that the plurality of radio links of the M3L-UE are simultaneously in a normal radio transmission and receiving working state; power coupling attenuation between a interference transmission system terminal (ITST) and a receiving terminal under test (RTUT) is adjusted; an equivalent interference source is constructed; and a rollback value of a receiving sensitivity of the RTUT under the stray interference is measured. According to the invention, the method has a high simulation efficiency; and simulation time of mutual interference of radio frequencies is substantially reduced.
Description
Technical field
The present invention relates to, under a kind of multi-mode coexisting and while normal running conditions, adopt the method for equivalent interference source method simulated measurement clutter interference, specifically, relate to the multi-link mobile terminal (M of a kind of simulated measurement multimode
3l-UE, Multi-mode Multi-link UE) interference source emission system (ITST, Interference Transmission System Terminal) clutter interference is for the method for the receiving sensitivity rollback of a kind of receiving system to be measured (RTUT, Receiving Terminal Under Test) wherein.
Background technology
The fast development of cellular mobile network, WLAN (wireless local area network) and the broadcasting and television network communication technology, has stimulated people on mobile terminal, to use multiple services demand, has occurred M
3l-UE, such as 3GPP has been M at LTE redaction definition of T ype A and Type B terminal
3l-UE.Due to M
3l-UE is the intelligent mobile terminal that more than, wireless link activates simultaneously, will face the complexity technical problem such as coexistence problems and the interior index optimization of system between system, causes M
3the research of L-UE radio frequency mutual interference problem and solution are all extremely complicated, many interference particularly clutter interference characteristic and phenomenon etc. thereof cannot be reproduced and assessment at real test environment, need to, by modeling, analysis and checking in simulated environment, just can obtain correct result.
Yet, M
3the general apart from each other of two system works frequencies of L-UE clutter interference, as GSM900/TD-SCDMA dual-mode handset, both differ 900MHz at operating frequency, and its clutter interference of emulation can consume a large amount of computational resources, needs to wait for the longer time.
For addressing this problem, significantly improve simulation efficiency, shorten M
3l-UE radio frequency mutual interference research cycle, there are some computation models in the past.For example, according to the spuious requirement of two system transmitters, adopt deterministic calculation, calculate between system and will realize the needed minimum coupling loss (MCL) that allows of necessary clutter interference inhibition, thereby extrapolate the impact of clutter interference, but it is comprehensive not to the interference analysis between system, relate in particular to the situation that terminal is disturbed.
Summary of the invention
For the problems referred to above, the invention provides a kind of efficient emulation M
3the method of clutter interference between L-UE system.Adopt equivalent interference source method provided by the invention, by RTUT receiving sensitivity rollback dB value, characterization system clutter interference compossibility.
Emulation M of the present invention
3the equivalent interference source method of L-UE clutter interference, comprises the following steps:
Step S1, sets up M
3a plurality of wireless communication link normal operation circumstances and the condition of L-UE, make described M
3a plurality of wireless communication links of L-UE transmit and receive operating state in normal wireless simultaneously;
Step S2, adjusts the power coupling attenuation between ITST and RTUT, and ITST band stray signal is joined to RTUT;
Step S3, builds equivalent interference source;
Step S4, measures M
3l-UE clutter interference is to receiving sensitivity rollback value.
Described step S1, sets up M
3a plurality of wireless communication link normal operation circumstances and the condition of L-UE comprise:
1) build RTUT model of communication system;
2) build ITST model of communication system;
Described step S2, adjusts the power coupling attenuation between ITST and RTUT, by adding coupling attenuation device M to realize between upstream transmitter and downlink receiver.
Described step S3, comprises following steps:
1) operating frequency and the transmitting power of ITST and RTUT are set;
2) regulate the fading channel of RTUT system, find out clutter interference sensitizing range;
3) change the up tranmitting frequency of ITST, it is constant that assurance seals in the power level of RTUT.
The up tranmitting frequency of described change ITST, wherein meets two criterions: the one, approach RTUT downlink working frequency as far as possible, and the 2nd, the interference source band stray power level after equivalence remains unchanged in RTUT receive path frequency range.
Beneficial effect of the present invention: significantly improve simulation efficiency, shorten M
3l-UE radio frequency mutual interference simulation time.Other features and advantages of the present invention will be set forth in the following description or understand by implementing the present invention.
Accompanying drawing explanation
Fig. 1 is M
3l-UE wireless communication link schematic diagram;
Fig. 2 is M
3l-UE clutter interference simulating schematic diagram;
Fig. 3 is TD-SCDMA interference source signal spectrum;
Fig. 4 is interference source signal spectrum after TD-SCDMA equivalence;
Fig. 5 is equivalent interference source method clutter interference simulation result under different transmission power.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The M that the communication system that the ITST of take is TD-SCDMA standard and RTUT are formed as GSM900 communication system
3l-UE is example, describes the emulation mode of clutter interference.
Concrete steps are as follows:
1,, according to step S1, as shown in Figure 1, set up M
3a plurality of wireless link normal operation circumstances and the condition of L-UE comprise the following steps:
(1) rationally build GSM900 model of communication system, proofread and correct GSM900 base station signal source, add channel model and additive white Gaussian noise, emulation obtains the GSM900 error rate of system BER under different signal to noise ratio snr;
(2) rationally build TDSCDMA model of communication system, proofread and correct the up transmiting signal source of TDSCDAM, get local upstream transmitter part.
2, according to step S2, at this M
3between the TD-SCDMA upstream transmitter of L-UE and GSM900 downlink receiver, add coupling attenuation device M, generally getting coupling attenuation amount is 10dB, thereby realize TD-SCDMA band stray signal, seals in local GSM 900 receiver receive paths.
According to accompanying drawing 2, set up the up transmitting terminal equivalence interferer models MS2_TX in this locality and the two system, coupled decay Match loss of transmission end of base station traffic model BTS1_Tx, channel model Channel, additive white Gaussian noise AWGN, home reception system model M S1_RX and the ITST of RTUT.The clutter interference problem of MS2_TX to MS1_RX disturbed in simulation study.By changing MS2_TX transmitting power, obtain the error rate of local RTUT and the relation of signal to noise ratio, contrast with the clutter interference that does not add MS2_TX, draw MS1_RX receiving sensitivity rollback amount, and assess thus clutter interference.
3,, according to step S3, can be divided into following steps:
(1) GSM900 downlink receiver operating frequency being set is 959.8MHz, and transmitting power is 30dBm, the up transmitting operating frequency of TD-SCDAM 1880.8MHz, and transmitting power is 24dBm, signal spectrum is as shown in Figure 3;
(2) regulate the fading channel of GSM900 communication system, make the GSM900 downstream signal of receiver front end and TD-SCDMA upward signal suitable in frequency 959.8MHz power level, now clutter interference is obvious;
(3) adjusting the up transmitting operating frequency of TD-SCDMA is that 1000.8MHz(can select other frequency, reason is shown in summary of the invention), by changing TD-SCDMA transmitting power, guarantee at the band stray level of 959.8MHz consistent with former TD-SCDMA upward signal, obtain equivalent interference source signal, its frequency spectrum as shown in Figure 4.
4, according to step S4, change TD-SCDMA uplink transmission power (get respectively 10,21,24,30dBm, realize respectively by equivalent interference source method according to step 3), emulation obtains M
3the GSM900 system of the L-UE receiving sensitivity rollback amount that clutter interference is brought under TD-SCDMA different transmission power, as shown in Figure 5, assesses the impact of clutter interference thus.
In sum, the method is in the situation that guarantee that the spurious signal power level that receiver receives remains unchanged, and reduces the operating frequency interval of two systems.For example above, interference source operating frequency is equivalent to 1000.8MHz from 1880.8MHz, and emulation sampling number reduces over half, significantly improves simulation efficiency.Research shows, the method can shorten research M
3the advantage of half simulation time of L-UE radio frequency mutual interference.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. an emulation M
3the equivalent interference source method of L-UE clutter interference, is characterized in that comprising the following steps:
Step S1, sets up M
3a plurality of wireless communication link normal operation circumstances and the condition of L-UE, make described M
3a plurality of wireless communication links of L-UE transmit and receive operating state in normal wireless simultaneously;
Step S2, adjusts the power coupling attenuation between ITST and RTUT, and ITST band stray signal is joined to RTUT;
Step S3, builds equivalent interference source;
Described step S3, comprises following steps:
1) operating frequency and the transmitting power of ITST and RTUT are set;
2) regulate the fading channel of RTUT system, find out clutter interference sensitizing range;
3) change the up tranmitting frequency of ITST, it is constant that assurance seals in the power level of RTUT;
Step S4, measures M
3l-UE clutter interference is to receiving sensitivity rollback value.
2. emulation M according to claim 1
3the equivalent interference source method of L-UE clutter interference, is characterized in that, in step S1, and the described M that sets up
3a plurality of wireless communication link normal operation circumstances and the condition of L-UE comprise:
1) build RTUT model of communication system;
2) build ITST model of communication system.
3. emulation M according to claim 1
3the equivalent interference source method of L-UE clutter interference, is characterized in that, step S2, and the power coupling attenuation between described adjustment ITST and RTUT, by adding coupling attenuation device M to realize between upstream transmitter and downlink receiver.
4. emulation M according to claim 1
3the equivalent interference source method of L-UE clutter interference, it is characterized in that, the up tranmitting frequency of described change ITST, wherein meets two criterions: the one, approach RTUT downlink working frequency as far as possible, and the 2nd, the interference source band stray power level after equivalence remains unchanged in RTUT receive path frequency range.
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| CN201110304737.9A CN102368694B (en) | 2011-10-10 | 2011-10-10 | Equivalent interference source method for simulation of M3L-UE stray interference |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051873A (en) * | 2007-04-04 | 2007-10-10 | 中兴通讯股份有限公司 | Method for measuring receiving sensibility of being measured receiving system |
| CN101969653A (en) * | 2009-07-28 | 2011-02-09 | 中兴通讯股份有限公司 | Method for measuring receiving sensitivity of receiving terminal to be measured in multi-access terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101027892B (en) * | 2003-05-27 | 2011-06-22 | 美商内数位科技公司 | Multi-mode radio with interference cancellation circuit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051873A (en) * | 2007-04-04 | 2007-10-10 | 中兴通讯股份有限公司 | Method for measuring receiving sensibility of being measured receiving system |
| CN101969653A (en) * | 2009-07-28 | 2011-02-09 | 中兴通讯股份有限公司 | Method for measuring receiving sensitivity of receiving terminal to be measured in multi-access terminal |
Non-Patent Citations (2)
| Title |
|---|
| 陆音等."脉冲UWB系统对UMTS系统的干扰分析".《南京邮电大学学报（自然科学版）》.2010,第30卷(第3期),第5-9页. |
| 陆音等."脉冲UWB系统对UMTS系统的干扰分析".《南京邮电大学学报(自然科学版)》.2010,第30卷(第3期),第5-9页. * |
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