CN101499984B - Method for implementing related wideband sending signal by a plurality of different frequency RF module - Google Patents
Method for implementing related wideband sending signal by a plurality of different frequency RF module Download PDFInfo
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- CN101499984B CN101499984B CN2009100785082A CN200910078508A CN101499984B CN 101499984 B CN101499984 B CN 101499984B CN 2009100785082 A CN2009100785082 A CN 2009100785082A CN 200910078508 A CN200910078508 A CN 200910078508A CN 101499984 B CN101499984 B CN 101499984B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000009987 spinning Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000010295 mobile communication Methods 0.000 abstract description 3
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Abstract
A method of related wideband sending signal is realized using multiple different frequency RF modules, belong to wirelessly and mobile communication technology field, it is characterized in that, when practical transmission bandwidth is the broadband signal of B ', the carrier frequency f of two adjacent radio frequency units and the bandwidth B that may be sent will meet the two neighboring radio frequency unit of transmitting terminal
B1 '≤B1, while a upper radio frequency unit will send a frequency and be
Sinusoidal signal, this sinusoidal signal is demodulated for next radio frequency unit, to determine the difference of two adjacent radio frequency units, hereafter, next radio frequency unit is in practical transmission process, the broadband signal to be emitted is set to rotate the angle of a difference again, to realize the relevant transmission of broadband signal. The present invention solves the problems, such as that transmission bandwidth is limited, also, it helps improving the measurement accuracy to delay parameter.
Description
Technical field
The present invention relates to a kind of method of utilizing a plurality of different frequency RF modules to realize related wideband sending signal, belong to wireless and the mobile communication technology field.
Background technology
Along with the continuous development of radio communication and network technology, users have higher requirement to the speed and the reliability of mobile radio system.And according to the information theory criterion, higher transmission rate depends on the higher bandwidth of system, and the future communications system entails can adopt bigger bandwidth to transmit.In new communication system, adopt new communications band and bigger bandwidth, need carry out detailed research and portrayal to the broad-band channel propagation characteristic of this frequency range, and then set up the channel model of this system.The research focus that always is multi-antenna technology for the measurement and the modeling of broadband wireless channel; Have only through actual measurement; Grasp the key parameter of wireless channel, and set up corresponding channel model, for next generation mobile communication key technologies such as MIMO provide theoretical and the test foundation according to measurement result.
Channel measurement appearance (Channel Sounder) design is that the MIMO wireless channel is carried out based measurement; But because the bandwidth constraints of radio-frequency devices and digital-to-analogue conversion device; The single radio frequency transmitted bandwidth of channel measurement appearance is limited often, can not satisfy the more needs of high-bandwidth channels test.And to use the big bandwidth of single radio frequency emission, because the restriction of DA transducer and radio-frequency devices, its cost and design complexities often also are unacceptable.Realize broadband test; Need use a plurality of emission radio frequency units simultaneously, and be incoherent between the distinct transmit radio frequency unit, even the signal adjacent frequency bands that promptly sends; But do not have correlation between the phase place, the broadband signal that causes two emission radio frequency units to send is discontinuous on phase place.Obtain broadband signal, can not simply use the two to send the signal frequency-domain splicing.
Summary of the invention
To the band-limited problem that exists in the existing wireless channel measurement equipment, the present invention proposes a kind of method of utilizing a plurality of different frequency RF modules to realize related wideband sending signal.It is characterized in that said method contains following steps successively:
Step 1: transmitting terminal radio frequency unit 1 sends bandwidth and does
Broadband signal the time, send frequency and do
Sinusoidal signal, f
1Be the carrier frequency of radio frequency unit 1, B
1Be 1 bandwidth that can send signal of radio frequency unit, B '
1Be the bandwidth of radio frequency unit 1 actual transmission signal, B '
1≤B
1
Step 2: the carrier frequency f of transmitting terminal radio frequency unit k (k is more than or equal to 2)
kAnd bandwidth B
kSatisfy
Use transmitting terminal radio frequency unit k to do to the frequency that transmitting terminal radio frequency unit k-1 sends
Sinusoidal signal carry out demodulation, confirm differing of transmitting terminal radio frequency unit k-1 and transmitting terminal radio frequency unit k
Step 3: use transmitting terminal radio frequency unit k transmission bandwidth to do
Broadband signal, B '
kBe the bandwidth of radio frequency unit k actual transmission signal, B '
k≤B
k, utilize the phase place spinning solution, make the phase place of this broadband signal rotate
Step 4: use transmitting terminal radio frequency unit k when the transmission bandwidth is the broadband signal of
, sending frequency is the sinusoidal signal of
;
Step 5: repeating step 2-3, up to k equal intend the total emission radio frequency unit quantity N that adopts till.
According to the method for the invention; The radio frequency unit of making a start is measured through a last radio frequency unit is sent sinusoidal signal successively, obtains the transmitter, phase of this frequency, in actual process of transmitting; Through means such as phase place rotations, just can realize the relevant transmission of broadband signal.
The present invention can solve the problem of sending limited bandwidth in practical application, better understand the frequency characteristic of wireless channel, improves the isoparametric certainty of measurement of time delay, in wireless location technology, can improve locating accuracy.
This method can be used for various channel measurement equipment and wireless localization apparatus.
Description of drawings
Fig. 1 shows based on a kind of transmitter architecture that can practical application of the present invention.
Fig. 2 shows a kind of form that the different radio frequency unit sends signal among the present invention.
Embodiment
With reference to the accompanying drawings and combine instance to explain that the present invention realizes the mode that relevant broadband signal is sent.
In the middle of the present invention, to establish N radio frequency unit and use same local oscillator (LO), each radio frequency unit has different centre frequency f
1, f
2..., f
NSend bandwidth and be respectively B
1, B
2..., B
N
In the actual channel test process, baseband signal can be Chirp sequence, PN sequence or the Multitone sequence etc. in broadband.Use the bilateral bandwidth of transmitter unit 1 emission to be B
1Baseband signal the time, send a frequency and do
Sinusoidal signal, after handling through up-conversion, digital-to-analogue conversion etc., be transformed into carrier frequency f
1On.
(N) form and the transmitter unit 1 of individual transmitter unit transmission signal are similar for n=1,2...., and sending bilateral bandwidth respectively is B for n
nBaseband signal and a frequency do
Single-tone, be transformed into carrier frequency f
nOn.
The radiofrequency signal that transmitter unit 1 sends is except that going out through aerial radiation, and part energy is input in the transmitter unit 2 through coupler simultaneously, obtains frequency through filter and does
Sinusoidal signal, its phase place is exp (j (2 π f
1T+ φ
1(t))), φ
1(t) be the phase noise of transmitter unit 1.At transmitter unit 2 inside, frequency of utilization f
2This sinusoidal signal is carried out down-conversion, obtain multiple sinusoidal signal exp (j (2 π (f
2-f
1) t+ φ
2(t)-φ
1(t))), φ
2(t) be the phase noise of transmitter unit 2.Multiple sinusoidal signal exp (j (2 π (f
2-f
1) t+ φ
2(t)-φ
1(t))) through filtering and analog-to-digital conversion, with exp (j2 π (f
2-f
1) t) multiply each other, can obtain exp (j (φ
2(t)-φ
1(t))),, can obtain the φ that differs of transmitter unit 2 and transmitter unit 1 through means such as phase discriminators
2(t)-φ
1(t).
2 baseband signals that will send of transmitter unit, at first through modes such as phase shifters, rotation φ
2(t)-φ
1(t) phase place, and then with a frequency do
The single-tone addition after, carry out after up-conversion, the digital-to-analogue conversion, with signal frequency conversion to radio frequency f
2On, send through antenna.
Detection and the process of transmitting of transmitter unit k (k >=2) are similar to transmitter unit 2, through cascade system, can realize the relevant transmission of the broadband wireless signal of any bandwidth in theory.
Afterbody transmitter unit for cascade; Can send the single-tone of
, also can not send.
This method can be used for channel measurement, and other need send the equipment of high-bandwidth signals also can be used for wireless localization apparatus etc.
Although invention has been described with reference to accompanying drawing; Yet for the personnel of skilled, it is obvious that; Can be under the situation that does not deviate from the aim of the present invention that is defined by the following claims and scope, thought of the present invention is applied in the different instantiations goes.The description here is just illustrative, and should not think restrictive fully.Scope of patent protection of the present invention is provided by accompanying claims, rather than the explanation of front.Therefore all various modification and equivalents that drop in the claim scope all should belong within the scope of patent protection of the present invention.
Claims (6)
1. method of utilizing a plurality of different frequency RF modules to realize related wideband sending signals is characterized in that said method contains following steps successively:
Step 1: transmitting terminal radio frequency unit 1 sends bandwidth and does
Broadband signal the time, send frequency and do
Sinusoidal signal, f
1Be the carrier frequency of radio frequency unit 1, B
1Be 1 bandwidth that can send signal of radio frequency unit, B '
1Be the bandwidth of radio frequency unit 1 actual transmission signal, B '
1≤B
1
Step 2: the carrier frequency f of transmitting terminal radio frequency unit k
kAnd bandwidth B
kSatisfy
Use transmitting terminal radio frequency unit k to do to the frequency that transmitting terminal radio frequency unit k-1 sends
Sinusoidal signal carry out demodulation, confirm differing of transmitting terminal radio frequency unit k-1 and transmitting terminal radio frequency unit k
Wherein k is the integer more than or equal to 2;
Step 3: use transmitting terminal radio frequency unit k transmission bandwidth to do
Broadband signal, B '
kBe the bandwidth of radio frequency unit k actual transmission signal, B '
k≤B
k, utilize the phase place spinning solution, make the phase place of this broadband signal rotate
Step 4: use transmitting terminal radio frequency unit k when the transmission bandwidth is the broadband signal of
, sending frequency is the sinusoidal signal of
;
Step 5: repeating step 2-3, up to k equal intend the total emission radio frequency unit quantity N that adopts till.
2. the method for utilizing a plurality of different frequency RF modules to realize related wideband sending signal according to claim 1 is characterized in that said method is used for two radio frequency units.
3. the method for utilizing a plurality of different frequency RF modules to realize related wideband sending signal according to claim 1 is characterized in that said method is used for three and three above radio frequency units.
4. the method for utilizing a plurality of different frequency RF modules to realize related wideband sending signal according to claim 1 is characterized in that, the said phase place spinning solution of step 3 is for carrying out the phase place rotation to sending baseband signal.
5. the method for utilizing a plurality of different frequency RF modules to realize related wideband sending signal according to claim 1, the said phase place spinning solution of step 3 is for carrying out the phase place rotation to sending intermediate-freuqncy signal.
6. the method for utilizing a plurality of different frequency RF modules to realize related wideband sending signal according to claim 1, the said phase place spinning solution of step 3 is for carrying out the phase place rotation to sending radiofrequency signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100785082A CN101499984B (en) | 2009-02-25 | 2009-02-25 | Method for implementing related wideband sending signal by a plurality of different frequency RF module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100785082A CN101499984B (en) | 2009-02-25 | 2009-02-25 | Method for implementing related wideband sending signal by a plurality of different frequency RF module |
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| Publication Number | Publication Date |
|---|---|
| CN101499984A CN101499984A (en) | 2009-08-05 |
| CN101499984B true CN101499984B (en) | 2012-02-08 |
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|---|---|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188577A (en) * | 1995-05-02 | 1998-07-22 | 法国电讯公司 | Design of multicarrier signal |
| CN1348655A (en) * | 1999-04-23 | 2002-05-08 | 高通股份有限公司 | Method and apparatus for transmitting the sync channel message in a multi-carrier communication system |
-
2009
- 2009-02-25 CN CN2009100785082A patent/CN101499984B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188577A (en) * | 1995-05-02 | 1998-07-22 | 法国电讯公司 | Design of multicarrier signal |
| CN1348655A (en) * | 1999-04-23 | 2002-05-08 | 高通股份有限公司 | Method and apparatus for transmitting the sync channel message in a multi-carrier communication system |
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| CN101499984A (en) | 2009-08-05 |
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