CN101043235A - Method for controlling emission power of pilot signal - Google Patents
Method for controlling emission power of pilot signal Download PDFInfo
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- CN101043235A CN101043235A CN 200610072164 CN200610072164A CN101043235A CN 101043235 A CN101043235 A CN 101043235A CN 200610072164 CN200610072164 CN 200610072164 CN 200610072164 A CN200610072164 A CN 200610072164A CN 101043235 A CN101043235 A CN 101043235A
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Abstract
The invention discloses a pilot frequency signal emission power control method that comprises: ensuring the plus value of pilot frequency signal; multiplying said plus value of pilot frequency signal with pilot frequency sequence to obtain the pilot frequency sequence gained; the base band sending end sends the pilot frequency sequence gained. The invention adopts the intermediate frequency clipping threshold and linear work point range of power amplifier to ensure the plus value of pilot frequency signal, takes use of linear amplification resource of power amplifier, increases the emission power of pilot frequency signal, improves the Signal-to-Noise and decreases the distortion of the pilot frequency signal, the receiving end can receive and renew the pilot frequency signal better.
Description
Technical field
The present invention relates to the communications field, relate in particular to OFDM (Orthogonal FrequencyDivision Multiplexing, OFDM) method for controlling emission power of pilot signal in the system.
Background technology
In recent years, broadband wireless communication technique and application arrived swift and violent development, people are to the demand of wireless data multimedia service, have promoted to be used for the development and the application of the new technology of high-speed wideband radio communication.(multiple-input multiple-output, MIMO) technology or be about to be used for various high-speed wideband wireless communication systems for OFDM technology and multiple-input and multiple-output.
The thought of frequency division multiplexing and parallel data transmission appears at nineteen sixties the earliest, and through the research and development of four more than ten years, OFDM has become the high speed data transfer technology of extensive use.A wherein most important operation technique be fast fourier transform (Fast Fourier Transform, FFT).It greatly reduces the difficulty of parallel data modulation, thereby makes a large amount of uses of OFDM become possibility.
The basic thought of OFDM is that the data with needs transmission are distributed on the subcarriers of a large amount of transmission simultaneously, though what adopt on each subcarrier is modulation system than low rate, owing to number of sub carrier wave is numerous, so integral body can be used high speed data transfer.Realize quadrature by suitable selection spectrum intervals between these subcarriers.
At present, the correlation technique of OFDM and MIMO combination has been finished the standard formulation in IEEE802.16.In addition, in the mobile radio telecommunications connecting system, the wireless access network of third generation partner program (3GPP), the physical layer of IEEE 802.20 are also considering to use OFDM technology and MIMO technology, the mobile radio telecommunications connecting system that has higher frequency efficient with structure.
Adopted the data transmission system of OFDM technology to have the following advantages:
1) expansion has stronger fault-tolerance to multidiameter.As shown in Figure 1, comprise two parts on the OFDM symbol time domain: data division and Cyclic Prefix part, the Cyclic Prefix part is generated by the end circulation of data division, and the time that data division takies among Fig. 1 is T
Data, the time that Cyclic Prefix partly takies is T
CpThe fault-tolerance of OFDM technology shows: compare with the duration T s of an OFDM symbol, the duration of representative channel impulse response is very little, only takies very little part among the Ts, therefore can be by increasing less Cyclic Prefix, i.e. T
Cp, to overcome the interference between signals that causes by multipath fully.
2) frequency selective fading had stronger fault-tolerance.The OFDM technology can be recovered the entrained digital signal of deep fade subcarrier by redundancy schemes such as employing chnnel codings.
3) adopted simple equalization algorithm.Because the OFDM technology adopts frequency domain to transmit signal, and acting on of channel shows as simple multiplication on the frequency domain, thereby makes the data transmission system that adopts the OFDM technology when carrying out signal equalization, only needs a simple single tap equalizers to realize.
4) for frequency division multiplexing (FDM) technology, the OFDM technology has higher spectrum efficiency.
In current ofdm system pilot design, two kinds of pilot design methods of main employing, a kind ofly be staggered pilot tone (Stagger-Type) or be called Comb Pilot (Comb-Type), another kind is block pilot tone (Block-Type), as shown in Figure 2, for the pilot tone of Block-Type, the single transmitting power of main employing in the prior art, and this transmitting power is a normal value that obtains according to a certain proportionate relationship with the data division transmitting power.That is to say this normal value is write the baseband transmission end in advance in advance that the baseband transmission end will be gone out pilot signal transmission with this normal value power.
There is following shortcoming in above-mentioned pilot signal transmission of the prior art:
Because power peak-to-average force ratio (the Peak to average power ratio of OFDM technology, PAPR) value may be very big, in fact just the dynamic range of transmitter is quite big, make and to launch the OFDM data-signal normally, the bigger power amplifier of the relative working point range of linearity may will be selected, if and this moment, the pilot signal base band was only used single power, will produce following problem:
(1) if the transmitting power of pilot signal is lower, and transmitter a bigger range of linearity is arranged the time, because the power bracket of emission pilot tone only accounts for sub-fraction wherein, can not make full use of this bigger range of linearity, can cause the power amplifier wasting of resources within the specific limits; Simultaneously, make that the signal to noise ratio of receiving terminal is less, thereby pilot signal may not fine reception and processing at receiving terminal, make the function that pilot signal loses its due effect fully and should finish because transmitting power is lower.
(2) if the transmitting power of pilot signal is higher; intermediate-frequency section is in order to protect power amplifier and to handle the problem that power amplifier causes the nonlinear distortion of signal; can an intermediate frequency slicing thresholding be set by the working point of power amplifier and the average power of baseband signal; the signal of delivering to intermediate frequency when base band is during greater than intermediate frequency slicing thresholding; intermediate-frequency section can be by a cover intermediate frequency slicing algorithm; this signal is handled, it is guaranteed in thresholding.Though processed signal can guarantee in thresholding, also causes the distortion of processed signal simultaneously.Equally, pilot signal is handled through slicing also can cause distortion, even introduces in the band and out-of-band noise, can make receiving terminal can't correctly recover and handle pilot frequency information after the pilot signal distortion.Working point scope when the transmitter terminal power amplifier is not very high in addition, may cause situation generations such as power amplifier damage owing to power is excessive yet.
Summary of the invention
The invention provides a kind of method for controlling emission power of pilot signal, in order to solve the pilot signal that exists in the prior art only comparable data part transmitting power adopt a constant power value emission, cause the wasting of resources, the receiving terminal signal to noise ratio is little or the problem of distorted signals.
The inventive method comprises:
A, determine the pilot signal gain value;
B, described pilot signal gain value and pilot frequency sequence are multiplied each other, obtain pilot frequency sequence gained and send.
Described steps A comprises:
Described base band sending end is determined the pilot signal gain value according to the linear working range of intermediate frequency slicing thresholding and power amplifier; The performance number of pilot frequency sequence gained is satisfied smaller or equal to intermediate frequency slicing threshold power value, and smaller or equal to the maximal input value of power amplifier linearity working range.
Described steps A comprises:
Described base band sending end continuously or the cycle obtain the linear working range of intermediate frequency slicing thresholding and power amplifier, upgrade the pilot signal gain value of determining; The performance number of pilot frequency sequence gained is satisfied smaller or equal to intermediate frequency slicing threshold power value, and smaller or equal to the maximal input value of power amplifier linearity working range.
According to said method of the present invention, default a plurality of optional yield values;
Time domain power peak with pilot frequency sequence multiply by described optional yield value respectively, obtains corresponding a plurality of gain results values;
In described a plurality of gain results values, determine with described intermediate frequency slicing threshold power value the most approaching and with the immediate gain results value of power amplifier linearity scope maximal input value;
With the optional yield value of the described gain results value correspondence determined as described pilot signal gain value.
According to said method of the present invention, also comprise after the described steps A: the described pilot signal gain value that base band sending end will be determined is notified to receiving terminal;
Also comprise after the described step B: receiving terminal carries out the inverse operation of corresponding gain multiple according to described yield value after receiving pilot signal, recovers pilot signal.
Described base band sending end is notified to receiving terminal with the pilot signal gain value of determining, and concrete grammar is:
Base band sending end sends a pilot signal gain value notification message to receiving terminal, carries the described pilot signal gain value information of determining; After receiving terminal receives this notification message, parse the described pilot signal gain value of carrying; Perhaps
Base band sending end is carried the identification information of expression pilot signal gain value size by existing signaling, and receiving terminal is resolved described identification information, obtains corresponding pilot signal gain value.
Described identification information is the binary number that takies N bit; After receiving terminal receives this N bit,, determine the yield value of this N bit binary number correspondence according in advance and the corresponding relation of arranging between the base band sending end.
The number of bits N that described identification information takies determines according to the yield value number of arranging between base station transmitting terminal and the receiving terminal.
Described step B comprises: with base band pilot tone signal directly and the pilot signal gain value multiply each other by multiplier, pilot tone frequency-region signal after obtaining gaining, carry out invert fast fourier transformation IFFT again, the pilot tone time-domain signal after obtaining gaining is handled the back by middle Radio frequency Processing Unit, RF Processing Unit and is sent; Perhaps
Base band pilot tone signal is carried out the IFFT conversion earlier, multiply each other by multiplier with described pilot signal gain value after transforming to time domain again, the pilot tone time-domain signal after obtaining gaining is handled the back by middle Radio frequency Processing Unit, RF Processing Unit and is sent.
Receiving terminal carries out fast fourier transform FFT earlier after receiving time-domain pilot signal, obtain the pilot tone signal after, carry out the inverse operation of corresponding gain multiple again, recover pilot signal.
According to said method of the present invention, also comprise before the described steps A: select the less Serial No. of power peak-to-average force ratio PAPR value as pilot frequency sequence.
The less Serial No. of described PAPR value can be generated by the PN sequence generator of 13 bits.
According to said method of the present invention, for many antenna transmission systems, among the described step B, described base band sending end sends pilot frequency sequence gained to each root antenna; Each antenna carries out sending after the IFFT conversion behind the phase rotation coefficient that on the frequency domain pilot frequency sequence gained be multiply by correspondence again.
Beneficial effect of the present invention is as follows:
When (1) the present invention launched pilot signal, base band sending end was determined a proper pilot signal gain value earlier according to the linear working range of intermediate frequency slicing thresholding and power amplifier; Pilot signal gain value and the pilot frequency sequence determined are multiplied each other, obtain pilot frequency sequence gained; Make the performance number of pilot frequency sequence gained satisfy smaller or equal to intermediate frequency slicing threshold power value, and smaller or equal to the maximal input value of power amplifier linearity working range.Like this, with regard to not being carried out the slicing processing, cause producing distortion at base band sending end pilot transmitted signal owing to exceeding intermediate frequency slicing thresholding; Owing to can not surpass the linear working range of power amplifier, protected power amplifier simultaneously.
(2) the present invention is by default a plurality of optional yield values, multiply by optional yield value respectively with the time domain power peak of pilot frequency sequence, obtains a plurality of gain results values of correspondence; In a plurality of gain results values, determine with intermediate frequency slicing threshold power value the most approaching and with the immediate gain results value of power amplifier linearity scope maximal input value; With the optional yield value of the gain results value correspondence determined as described pilot signal gain value.Like this, making pilot signal not only can not carried out slicing by intermediate frequency handles, avoid distorted signals, also take the transmitting power of maximum possible to launch, improve the efficient of power amplifier and receiving terminal to the ratio of casually making an uproar that pilot signal receives, made receiving terminal can receive and recover pilot signal better.
Description of drawings
Fig. 1 forms schematic diagram for the OFDM symbol;
Fig. 2 is the pilot transmission schematic diagram of Block-Type;
Fig. 3 is one of the inventive method embodiment flow chart;
Fig. 4 is two of the inventive method embodiment flow chart.
Embodiment
Method for controlling emission power of pilot signal provided by the invention comprises:
Determine the pilot signal gain value;
Described pilot signal gain value and pilot frequency sequence are multiplied each other, obtain pilot frequency sequence gained;
Base band sending end sends pilot frequency sequence gained.
Below in conjunction with accompanying drawing, said method of the present invention is described in detail with specific embodiment.
Embodiment 1:
Referring to Fig. 3, for the embodiment of the invention 1 flow chart of steps, in embodiment 1, pilot signal gain value is disposable determine after, no longer change; Concrete steps comprise:
Step S11, select the less data sequence of PAPR value as pilot frequency sequence.
It is as follows that the PAPR value of pilot frequency sequence is carried out formula:
In the formula (1):
Adopt the pilot frequency sequence of less PAPR value, can reduce the loss of pilot signal when transmitting terminal is launched, also can reduce the difficulty that transmitting terminal and receiving terminal are handled pilot signal, improve the pilot signal processing speed.For example: can use the PN sequence generator of 13Bit to generate pilot frequency sequence:
h(d)＝1+D
8+D
11+D
12+D
13
Step S12, base band sending end are obtained the linear working range of intermediate frequency slicing thresholding and power amplifier, determine the pilot signal gain value.
Base band sending end is obtained the intermediate frequency slicing thresholding that system is provided with, perhaps the statistical property by baseband signal calculates intermediate frequency slicing thresholding (the concrete computational methods of intermediate frequency slicing threshold value is prior art, be not described further at this), the working point range of linearity by middle Radio frequency Processing Unit, RF Processing Unit feedback power amplifier simultaneously; Base band sending end is determined a suitable gain constant value according to the range of linearity maximal input value of intermediate frequency slicing threshold power value and power amplifier is disposable; Concrete grammar is for example:
Suppose that intermediate frequency slicing threshold power value is A, power amplifier linearity scope maximal input value is B, base band by the pilot tone signal is carried out invert fast fourier transformation (IFFT) to calculate pilot tone time domain maximum power value be C, and set in advance a cover gain multiple D=(d
1, d
2, d
3... d
n), then needing from the D sequence, to choose the yield value that suitable gain constant value is used as pilot signal, this gain constant value will guarantee to satisfy following two conditions at least:
Condition 1: gain multiple d
m(d
m∈ D) product with above-mentioned pilot signal time domain maximum power value (power peak) C satisfies smaller or equal to above-mentioned slicing threshold power value A and power amplifier maximal input value B; That is:
d
m×C≤A (2)
d
m×C≤B (3)
Be that formula (2) and formula (3) satisfy simultaneously; That is to say d
m* C must be smaller or equal to the smaller value among slicing threshold power value A and the power amplifier maximal input value B; Suppose B＜A, then d
m* C must satisfy formula (3).
Satisfying condition 1 can guarantee that pilot signal does not cause distorted signals because of the nonlinear problem of intermediate frequency slicing or power amplifier at transmitting terminal, avoided pilot signal generation distortion that receiving terminal receives after, can't normally recover the problem of pilot signal.
Condition 2: selected d
mBe the maximum in the D sequence that satisfies formula (2) and formula (3) condition.Suppose:
d
1＜d
2＜d
3...＜d
n (4)
And suppose B＜A, then adopt the formula (3) in the condition 1, supposing has d
2And d
1For satisfying two gain multiple value of formula (3); Then according to condition 2, get the maximum of the D sequence in 1 that satisfies condition, by formula (4) as can be known, at d
2And d
1In determine d
2As the pilot signal gain value.
Satisfying condition 2 is in order to guarantee to make full use of the range of linearity resource of power amplifier, to make transmitting terminal adopt bigger power emission pilot signal as far as possible, thereby improves the signal to noise ratio of receiving terminal, makes receiving terminal can receive and recover pilot signal as far as possible better.
Step S13, base band sending end are notified to receiving terminal with the pilot signal gain value of determining.Concrete grammar is for example:
Base band sending end sends a pilot signal gain value notification message to receiving terminal, carries the pilot signal gain value information of determining; After receiving terminal receives this notification message, parse the pilot signal gain value of carrying.
Perhaps, base band sending end is carried the identification information of expression pilot signal gain value size by existing signaling, and receiving terminal is resolved this identification information, obtains corresponding pilot signal gain value.
Identification information can be represented with the binary number that takies N bit; After receiving terminal receives this N bit,, determine the yield value of this N bit binary number correspondence according in advance and the corresponding relation of arranging between the base band sending end.The number of bits N that identification information takies can determine according to the yield value number of arranging between base station transmitting terminal and the receiving terminal.For example: base band sending end and receiving terminal are appointed corresponding several yield value in advance, represent this several yield values with N Bit position simultaneously, for example identify corresponding yield value with 2 Bit positions:
00 expression yield value is 1 or does not have a gain;
01 expression yield value is 2 times;
10 expression yield values are 4 times;
11 expression yield values are 8 times.
Concrete what bits that adopt identify yield value, can determine according to the yield value number of arranging between the two, if the yield value number of agreement is 4, then available 2 Bit positions identify corresponding yield value; If the yield value number of agreement is 8, then available 3 Bit positions identify corresponding yield value; By that analogy.
Step S14, base band sending end multiply each other disposable definite proper pilot signal gain value and pilot frequency sequence, obtain pilot frequency sequence gained, and send pilot frequency sequence gained to receiving terminal.
Concrete processing method can be:
1, base band pilot tone signal directly and the pilot signal gain value multiply each other by multiplier, pilot tone frequency-region signal after obtaining gaining, do the pilot tone time-domain signal after invert fast fourier transformation (IFFT) obtains gaining again, Radio frequency Processing Unit, RF Processing Unit and sending in giving;
2, base band pilot tone signal is carried out the IFFT conversion earlier, transform to after the time domain again and described pilot signal gain.Value multiplies each other by multiplier, the pilot tone time-domain signal after obtaining gaining, and radio frequency part is handled and is sent in giving then.
Base band sending end will be handled pilot frequency sequence with this yield value always.
After step S15, receiving terminal receive pilot frequency sequence, carry out the inverse operation of corresponding gain multiple, recover pilot signal according to the pilot signal gain value that obtains.Be specially:
After receiving time-domain pilot signal, carry out fast Fourier transform (FFT) earlier, obtain the pilot tone signal after, carry out the inverse operation of corresponding gain multiple again, recover pilot signal.
For many antenna transmission systems, base band sending end sends pilot frequency sequence gained to each root antenna; Each antenna carries out launching after the IFFT conversion behind the phase rotation coefficient that on the frequency domain pilot frequency sequence gained be multiply by correspondence again.
For example: every antenna is handled by the method for cyclic shift pilot signal:
Wherein m is a m root antenna number, S
m(k) be the pilot signal that will send on the m root antenna, k is the index number of subcarrier in frequency domain, Δ t
mBe m root antenna is wanted cyclic shift on frequency domain coefficient, then be presented as time delay factor on the time domain.
The foregoing description 1 is primarily aimed at that can not change or change not in power amplifier performance and intermediate frequency process parameter can very big system, and in this case, the pilot signal gain value can disposablely be chosen, no longer change.Yet change greatly for power amplifier properties, perhaps intermediate frequency process parameter update frequency higher system, disposable to choose the method that yield value no longer changes just no longer suitable, need take the method among the following embodiment 2.
Embodiment 2: the linear working range that base band sending end is obtained intermediate frequency slicing thresholding and power amplifier continuously or periodically, upgrade the pilot signal gain value of determining.Its concrete implementation step comprises as shown in Figure 4:
Step S21, identical with Fig. 3 step S11 does not repeat.
Step S22, base band sending end are obtained the linear working range of intermediate frequency slicing thresholding and power amplifier continuously or periodically, determine the pilot signal gain value.The concrete of its pilot signal gain value determines that method can be identical with the step S12 among Fig. 3, do not repeat.
Step S23, base band sending end judge whether it is to determine the pilot signal gain value for the first time, if go to step S27; Otherwise, continue step S24;
Step S24, base band sending end judge further whether the current yield value of determining is identical with the last yield value of determining, if identical, execution in step S25 then; If different, execution in step S26
Step S25, baseband transmission end still adopt pilot tone yield value that the last time determines as current pilot tone yield value, go to step S28;
Step S26, renewal pilot signal gain value are the current yield value of determining; Execution in step S27;
Step S27, base band sending end are notified to receiving terminal with the current pilot signal gain value of determining.Concrete Notification Method can be identical with the step S13 among Fig. 3, do not repeat.
Step S28, base band sending end multiply each other pilot signal gain value and pilot frequency sequence, obtain pilot frequency sequence gained, and send pilot frequency sequence gained to receiving terminal; Specific implementation method can be identical with step S14 among Fig. 3, do not repeat.
After step S29, receiving terminal receive pilot frequency sequence, carry out the inverse operation of corresponding gain multiple, recover pilot signal according to the pilot signal gain value that obtains.
If transmitting terminal has upgraded the pilot signal gain value, then by above-mentioned steps S27 notice receiving terminal; In this step, receiving terminal adopts the pilot signal gain value after upgrading to carry out the inverse operation of corresponding gain multiple, recovers pilot signal;
If transmitting terminal does not upgrade the pilot signal gain value, then needn't repeat to notify receiving terminal; The pilot signal gain value of using before receiving terminal adopts is carried out the pilot signal inverse operation, recovers pilot signal.
Embodiment 2 is applicable to that mainly (power amplifier can change and problem such as aging has greatly changed according to natural environments such as ambient temperature, humidity), perhaps intermediate frequency slicing threshold value renewal frequency higher system can take place to change in a big way the linear working range of power amplifier.
In sum, when the present invention launches pilot signal,, determine a proper pilot signal gain value earlier by the linear working range of base band sending end according to intermediate frequency slicing thresholding and power amplifier; Pilot signal gain value and the pilot frequency sequence determined are multiplied each other, obtain pilot frequency sequence gained; Make the performance number of pilot frequency sequence gained satisfy smaller or equal to intermediate frequency slicing threshold power value, and smaller or equal to the maximal input value of power amplifier linearity working range.Base band sending end sends to receiving terminal with pilot frequency sequence gained, like this, with regard to not being carried out the slicing processing owing to exceeding intermediate frequency slicing thresholding, causes producing distortion at base band sending end pilot transmitted signal; Owing to can not surpass the linear working range of power amplifier, protected power amplifier simultaneously.
The present invention is by default a plurality of optional yield values, multiply by optional yield value respectively with the time domain power peak of pilot frequency sequence, obtains a plurality of gain results values of correspondence; In a plurality of gain results values, determine with intermediate frequency slicing threshold power value the most approaching and with the immediate gain results value of power amplifier linearity scope maximal input value; With the optional yield value of the gain results value correspondence determined as described pilot signal gain value.Like this, making pilot signal not only can not carried out slicing by intermediate frequency handles, avoid distorted signals, also take the transmitting power of maximum possible to launch, improve the efficient of power amplifier and receiving terminal to the signal to noise ratio that pilot signal receives, made receiving terminal can receive and recover pilot signal better.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1, a kind of method for controlling emission power of pilot signal is characterized in that, comprising:
A, determine the pilot signal gain value;
B, described pilot signal gain value and pilot frequency sequence are multiplied each other, obtain pilot frequency sequence gained and send.
2, the method for claim 1 is characterized in that, described steps A comprises:
Described base band sending end is determined the pilot signal gain value according to the linear working range of intermediate frequency slicing thresholding and power amplifier; The performance number of pilot frequency sequence gained is satisfied smaller or equal to intermediate frequency slicing threshold power value, and smaller or equal to the maximal input value of power amplifier linearity working range.
3, the method for claim 1 is characterized in that, described steps A comprises:
Described base band sending end continuously or the cycle obtain the linear working range of intermediate frequency slicing thresholding and power amplifier, upgrade the pilot signal gain value of determining; The performance number of pilot frequency sequence gained is satisfied smaller or equal to intermediate frequency slicing threshold power value, and smaller or equal to the maximal input value of power amplifier linearity working range.
4, as claim 2 or 3 described methods, it is characterized in that default a plurality of optional yield values;
Time domain power peak with pilot frequency sequence multiply by described optional yield value respectively, obtains corresponding a plurality of gain results values;
In described a plurality of gain results values, determine with described intermediate frequency slicing threshold power value the most approaching and with the immediate gain results value of power amplifier linearity scope maximal input value;
With the optional yield value of the described gain results value correspondence determined as described pilot signal gain value.
5, the method for claim 1 is characterized in that, also comprise after the described steps A: the described pilot signal gain value that base band sending end will be determined is notified to receiving terminal;
Also comprise after the described step B: receiving terminal carries out the inverse operation of corresponding gain multiple according to described yield value after receiving pilot signal, recovers pilot signal.
6, method as claimed in claim 5 is characterized in that, described base band sending end is notified to receiving terminal with the pilot signal gain value of determining, and concrete grammar is:
Base band sending end sends a pilot signal gain value notification message to receiving terminal, carries the described pilot signal gain value information of determining; After receiving terminal receives this notification message, parse the described pilot signal gain value of carrying; Perhaps
Base band sending end is carried the identification information of expression pilot signal gain value size by existing signaling, and receiving terminal is resolved described identification information, obtains corresponding pilot signal gain value.
7, method as claimed in claim 6 is characterized in that, described identification information is the binary number that takies N bit; After receiving terminal receives this N bit,, determine the yield value of this N bit binary number correspondence according in advance and the corresponding relation of arranging between the base band sending end.
8, method as claimed in claim 7 is characterized in that, the number of bits N that described identification information takies determines according to the yield value number of arranging between base station transmitting terminal and the receiving terminal.
9, method as claimed in claim 5, it is characterized in that, described step B comprises: with base band pilot tone signal directly and the pilot signal gain value multiply each other by multiplier, pilot tone frequency-region signal after obtaining gaining, carry out invert fast fourier transformation IFFT again, pilot tone time-domain signal after obtaining gaining is handled the back by middle Radio frequency Processing Unit, RF Processing Unit and is sent; Perhaps
Base band pilot tone signal is carried out the IFFT conversion earlier, multiply each other by multiplier with described pilot signal gain value after transforming to time domain again, the pilot tone time-domain signal after obtaining gaining is handled the back by middle Radio frequency Processing Unit, RF Processing Unit and is sent,
Receiving terminal carries out fast fourier transform FFT earlier after receiving time-domain pilot signal, obtain the pilot tone signal after, carry out the inverse operation of corresponding gain multiple again, recover pilot signal.
10, the method for claim 1 is characterized in that, also comprises before the described steps A: select the less Serial No. of power peak-to-average force ratio PAPR value as pilot frequency sequence.
11, method as claimed in claim 10 is characterized in that, the less Serial No. of described PAPR value can be generated by the PN sequence generator of 13 bits.
12, the method for claim 1 is characterized in that, for many antenna transmission systems, among the described step B, described base band sending end sends pilot frequency sequence gained to each root antenna; Each antenna carries out sending after the IFFT conversion behind the phase rotation coefficient that on the frequency domain pilot frequency sequence gained be multiply by correspondence again.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562883B (en) * | 2008-04-14 | 2012-09-26 | Atmel德国有限公司 | Transmission circuit, transmission method and use |
| CN103188194A (en) * | 2011-12-29 | 2013-07-03 | 联芯科技有限公司 | Measuring device and measuring method of signal power in orthogonal frequency division multiplexing (OFDM) system |
| CN107078836A (en) * | 2014-11-25 | 2017-08-18 | 华为技术有限公司 | The generation method and device of a kind of pilot signal |
| WO2018059488A1 (en) * | 2016-09-30 | 2018-04-05 | 华为技术有限公司 | Method and device for transmitting reference signal |
| CN109995685A (en) * | 2017-12-29 | 2019-07-09 | 北京三星通信技术研究有限公司 | Method and apparatus for channel estimation |
| CN111316708A (en) * | 2017-09-11 | 2020-06-19 | 瑞典爱立信有限公司 | Transmit power control in a wireless communication network |
| CN114826293A (en) * | 2022-04-19 | 2022-07-29 | Oppo广东移动通信有限公司 | Radio frequency system, wireless communication device and protection method of power amplifier |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000269919A (en) * | 1999-03-16 | 2000-09-29 | Matsushita Electric Ind Co Ltd | Ofdm communication unit |
| KR100526499B1 (en) * | 2000-08-22 | 2005-11-08 | 삼성전자주식회사 | Apparatus for transmit diversity for more than two antennas and method thereof |
| KR100469426B1 (en) * | 2002-06-21 | 2005-02-02 | 엘지전자 주식회사 | Method and apparatus for pilot signal transmission and reception |
-
2006
- 2006-04-14 CN CN2006100721640A patent/CN101043235B/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562883B (en) * | 2008-04-14 | 2012-09-26 | Atmel德国有限公司 | Transmission circuit, transmission method and use |
| CN103188194A (en) * | 2011-12-29 | 2013-07-03 | 联芯科技有限公司 | Measuring device and measuring method of signal power in orthogonal frequency division multiplexing (OFDM) system |
| CN103188194B (en) * | 2011-12-29 | 2016-01-06 | 联芯科技有限公司 | The signal power measurement apparatus and method of ofdm system |
| CN107078836A (en) * | 2014-11-25 | 2017-08-18 | 华为技术有限公司 | The generation method and device of a kind of pilot signal |
| US10404435B2 (en) | 2014-11-25 | 2019-09-03 | Huawei Technologies Co., Ltd. | Pilot signal generation method and apparatus |
| CN107078836B (en) * | 2014-11-25 | 2019-11-19 | 华为技术有限公司 | A kind of generation method and device of pilot signal |
| WO2018059488A1 (en) * | 2016-09-30 | 2018-04-05 | 华为技术有限公司 | Method and device for transmitting reference signal |
| CN107888531A (en) * | 2016-09-30 | 2018-04-06 | 华为技术有限公司 | A kind of reference signal transmission method and apparatus |
| US10778490B2 (en) | 2016-09-30 | 2020-09-15 | Huawei Technologies Co., Ltd. | Reference signal transmission method and apparatus |
| CN111316708A (en) * | 2017-09-11 | 2020-06-19 | 瑞典爱立信有限公司 | Transmit power control in a wireless communication network |
| CN109995685A (en) * | 2017-12-29 | 2019-07-09 | 北京三星通信技术研究有限公司 | Method and apparatus for channel estimation |
| CN109995685B (en) * | 2017-12-29 | 2024-03-01 | 北京三星通信技术研究有限公司 | Method and apparatus for channel estimation |
| CN114826293A (en) * | 2022-04-19 | 2022-07-29 | Oppo广东移动通信有限公司 | Radio frequency system, wireless communication device and protection method of power amplifier |
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