CN102223193B - Time divided network terminal radio frequency receives Group Delay Ripple measuring method and the system of link - Google Patents

Abstract

The time divided network terminal radio frequency in a kind of mobile communication technology field receives Group Delay Ripple measuring method and the system of link.Described method includes: receiving link to time divided network terminal radio frequency and send the multiple single audio signals in time divided network terminal works frequency range, the bandwidth of the plurality of single audio signal is 1.6MHz, and the initial phase of the plurality of single audio signal is identical；Described time divided network terminal radio frequency receives link and the single audio signal received is processed, and obtains signal in the same direction corresponding to each described single audio signal and orthogonal signalling；Described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；According to described group delay, obtain time divided network terminal radio frequency and receive the Group Delay Ripple of link.The present invention can obtain time divided network terminal radio frequency simply and receive the Group Delay Ripple of link.

Description

Time divided network terminal radio frequency receives Group Delay Ripple measuring method and the system of link

Technical field

The present invention relates to mobile communication technology field, particularly relate to a kind of time divided network terminal radio frequency and receive Group Delay Ripple measuring method and the system of link.

Background technology

Group delay is the system phase place (phase shift) at certain the frequency place rate of change for frequency.Group delay difference between different frequency is Group Delay Ripple.Generally, receive link and be divided into radio frequency and numeral two parts.Usual numerical portion is all linear phase, and namely θ (ω) is linear, thus the group delay of numerical portion is constant, namely the group delay of numerical portion does not change with the change of frequency, and Group Delay Ripple is 0.And the phase response of radio frequency part is not generally linear, so the group delay of whole reception link is not constant, and it is as frequency input signal change and changes.

It is the group delay of constant for numerical portion, prior art has maturation method to eliminate its impact；Radio frequency part is minimized along with the group delay that frequency changes then have to control could be affected within the specific limits.For TD-SCDMA system, owing to it is the time-division system of a stringent synchronization, must be considered within uplink transmission time lead (TA) so receiving link for the time delay receiving signal, whole system so could be kept to synchronize.Simultaneously because the input signal of TD-SCDMA system is broadband signal, bandwidth 1.6MHz.If whole reception link is relatively big to the Group Delay Ripple of this broadband signal, then not only can affect the reception of signal also can the synchronization of influential system.Usual Group Delay Ripple, more than 50ns, just cannot meet the requirement of TD-SCDMA base station.

Generally when design receives link, numerical portion can strictly be controlled as linear phase, and group delay is constant.But for radio frequency part, then more difficult control, thus there is certain Group Delay Ripple, the Group Delay Ripple that radio frequency part produces will influential system performance.Therefore in order to ensure the synchronization of whole system, it is necessary to know the Group Delay Ripple of radio frequency part.But prior art is but without measuring the technology that TD-SCDMA terminal radio frequency receives the Group Delay Ripple of link.Similarly, prior art is also without measuring the technology that other time divided network terminal radio frequencies receive the Group Delay Ripple of link.

Therefore, how to measure time divided network terminal radio frequency to receive the Group Delay Ripple of link and just become technical problem urgently to be resolved hurrily.

Summary of the invention

The problem that this invention address that is to provide a kind of time divided network terminal radio frequency and receives Group Delay Ripple measuring method and the system of link, to obtain the Group Delay Ripple of time divided network terminal radio frequency reception link simply.

In order to solve the problems referred to above, the invention provides a kind of time divided network terminal radio frequency and receive the Group Delay Ripple measuring method of link, including:

Receiving link to time divided network terminal radio frequency and send the multiple single audio signals in time divided network terminal works frequency range, the bandwidth of the plurality of single audio signal is identical with the bandwidth of described time divided network；

Described time divided network terminal radio frequency receives link and the single audio signal received is processed, and obtains signal in the same direction corresponding to each described single audio signal and orthogonal signalling；

Described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

According to described group delay, obtain time divided network terminal radio frequency and receive the Group Delay Ripple of link.

Alternatively, described time divided network includes TD-SCDMA or LTE (LongTermEvolution, Long Term Evolution).

Alternatively, the initial phase of the plurality of single audio signal is identical.

Alternatively, the frequency of the plurality of single audio signal is arithmetic progression.

Alternatively, the plurality of single audio signal is (1+8N) individual single audio signal, and the tolerance of described arithmetic progression is (0.2/N) MHz, and wherein, N is the integer more than or equal to 1.

Alternatively, the plurality of single audio signal is 9 single audio signals, and the tolerance of described arithmetic progression is 0.2MHz.

Alternatively, the plurality of single audio signal is 17 single audio signals, and the tolerance of described arithmetic progression is 0.1MHz.

Alternatively, the plurality of single audio signal is 33 single audio signals, and the tolerance of described arithmetic progression is 0.05MHz.

Alternatively, described time divided network terminal radio frequency receives the link single audio signal to receiving and carries out process and include being sequentially carried out down-converted and analog-to-digital conversion process.

Alternatively, the group delay that adjacent between two after described acquisition sequence single audio signal is corresponding is obtained by below equation:

$D\left({\mathrm{\ω}}_{n,n+1}\right)=\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1},$

Wherein, D (ω_{N, n+1}) the time divided network terminal radio frequency corresponding with (n+1)th single audio signal that be the n-th single audio signal receive the group delay of link,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

Alternatively, the Group Delay Ripple obtaining time divided network terminal radio frequency reception link described in includes: extracting maximum and the minima of described group delay, the difference of described maximum and described minima receives the Group Delay Ripple of link as time divided network terminal radio frequency.

In order to solve the problems referred to above, present invention also offers a kind of time divided network terminal radio frequency and receive the Group Delay Ripple measurement system of link, including:

Radio-frequency signal source, sends the multiple single audio signals in time divided network terminal works frequency range for receiving link to time divided network terminal radio frequency, and the bandwidth of the plurality of single audio signal is identical with the bandwidth of described time divided network；

Described time divided network terminal radio frequency receives link and the plurality of single audio signal is processed, and obtains signal in the same direction and the orthogonal signalling of each described single audio signal；

Group delay computing unit, for described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

Group Delay Ripple computing unit, receives described group delay, obtains time divided network terminal radio frequency and receives the Group Delay Ripple of link.

Alternatively, the initial phase of the plurality of single audio signal is identical and frequency is arithmetic progression, and described group delay computing unit includes:

Sequencing unit, the single audio signal received for described time divided network terminal radio frequency receives link is ranked up by frequency size；

Computing unit, for according to formula $D\left({\mathrm{\ω}}_{n,n+1}\right)=\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1}$ Obtain group delay corresponding with single audio signal adjacent between two after being ranked up by frequency size, wherein, D (ω_{N, n+1}) be the n-th single audio signal and (n+1)th single audio signal time divided network terminal radio frequency receive link group delay,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

Alternatively, described time divided network terminal radio frequency reception link includes:

Frequency mixer, for the described single audio signal received is carried out down-converted, obtains down-conversion signal；

Analog-digital converter, carries out analog-to-digital conversion process to described down-conversion signal, obtains signal in the same direction and the orthogonal signalling of each described single audio signal.

Alternatively, described Group Delay Ripple computing unit includes:

It is worth most extraction unit, receives described group delay, extract maximum and the minima of described group delay；

Subtrator, receives maximum and the minima of described group delay, calculates described maximum and the difference of described minima, and the difference of described maximum and described minima receives the Group Delay Ripple of link as time divided network terminal radio frequency.

Compared with prior art, the invention have the advantages that first receiving link to time divided network terminal radio frequency sends the single audio signal of multiple identical initial phases, receive link according to time divided network terminal radio frequency and obtain orthogonal signalling and the signal in the same direction of each single audio signal, and after single audio signal is ranked up by frequency size, obtain the group delay that frequency single audio signal adjacent between two is corresponding, finally the maximum of described group delay and the difference of minima are received the Group Delay Ripple of link as time divided network terminal radio frequency, thus adopting simple technical scheme just to obtain time divided network terminal radio frequency receive the Group Delay Ripple of link.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of the Group Delay Ripple measuring method of the TD-SCDMA terminal radio frequency reception link of one embodiment of the invention；

Fig. 2 is the schematic flow sheet of the Group Delay Ripple measuring method of the TD-SCDMA terminal radio frequency reception link of one detailed description of the invention of the present invention；

Fig. 3 is the result schematic diagram of the group delay of one embodiment of the invention；

Fig. 4 is the structural representation of the Group Delay Ripple measurement system of the TD-SCDMA terminal radio frequency reception link of one embodiment of the invention；

Fig. 5 is the structural representation of the Group Delay Ripple measurement system of the TD-SCDMA terminal radio frequency reception link of one detailed description of the invention of the present invention.

Detailed description of the invention

Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.

Elaborating a lot of detail in the following description so that fully understanding the present invention, but the present invention can also adopt other to be different from alternate manner described here to be implemented, therefore the present invention is not by the restriction of following public specific embodiment.

Existing time divided network terminal radio frequency receives link and generally comprises: for amplifying the amplifier of signal, for the frequency mixer of down-converted, for the analog filter filtered and for the analog-digital converter etc. of analog digital conversion.Owing to above-mentioned device is all analog device, Group Delay Ripple therefore can be produced.When different time divided network terminal radio frequencies receiving link and sending identical single audio signal, each time divided network terminal radio frequency receives link and receives the Group Delay Ripple difference of signal.But prior art is but without measuring the technology that time divided network terminal radio frequency receives the Group Delay Ripple of link, hence for drawbacks described above, the invention provides a kind of time divided network terminal radio frequency and receive Group Delay Ripple measuring method and the system of link, adopt simple technical scheme to obtain time divided network terminal radio frequency and receive the Group Delay Ripple of link.

It is described in detail below in conjunction with accompanying drawing.

Time divided network terminal radio frequency provided by the invention receives the Group Delay Ripple measuring method of link, including:

Receiving link to time divided network terminal radio frequency and send the multiple single audio signals in time divided network terminal works frequency range, the bandwidth of the plurality of single audio signal is identical with the bandwidth of described time divided network；

Described time divided network terminal radio frequency receives link and the single audio signal received is processed, and obtains signal in the same direction corresponding to each described single audio signal and orthogonal signalling；

Described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

According to described group delay, obtain time divided network terminal radio frequency and receive the Group Delay Ripple of link.

Illustrate for TD-SCDMA terminal for time divided network terminal below, but it should not limit the scope of the invention.Described time divided network terminal is in other embodiments of the invention, it is also possible to for other time divided network terminals such as GSM terminal or LTE terminal.The technology of the present invention is particularly suited for the terminal of requirement strict time-division, as: TD-SCDMA terminal or LTE terminal.

Shown in Figure 1, the TD-SCDMA terminal radio frequency of one embodiment of the invention receives the Group Delay Ripple measuring method of link, including:

S1, receives link to TD-SCDMA terminal radio frequency and sends the multiple single audio signals in TD-SCDMA terminal works frequency range, and the bandwidth of the plurality of single audio signal is 1.6MHz；

S2, described TD-SCDMA terminal radio frequency receives link and the single audio signal received is processed, and obtains signal in the same direction corresponding to each described single audio signal and orthogonal signalling；

S3, is ranked up described single audio signal by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

S4, according to described group delay, obtains TD-SCDMA terminal radio frequency and receives the Group Delay Ripple of link.

In described step S1, described TD-SCDMA terminal works frequency range includes: 2010MHz～2025MHz.The frequency receiving the single audio signal that link sends to TD-SCDMA terminal radio frequency must be positioned in above-mentioned scope.Described single audio signal is simple signal, refers specifically to the signal only having single-frequency at any time, such as the sinusoidal radio frequency signal of single-frequency.Owing to the bandwidth of TD-SCDMA communication system is 1.6MHz, therefore the bandwidth of multiple single audio signals that the present embodiment provides also is 1.6MHz.

In order to ensure the simple of subsequent calculations, it is preferable that the initial phase of each described single audio signal is identical.

In order to ensure the accuracy of subsequent calculations, the number of described single audio signal can not very little, and alternatively, the plurality of single audio signal is (1+8N) individual single audio signal；Being 1.6MHz to meet the bandwidth of the plurality of single audio signal, the tolerance of described arithmetic progression is (0.2/N) MHz, and wherein, N is the integer more than or equal to 1.The number of described single audio signal is more many, and the accuracy of subsequent calculations is more high.

In first embodiment of the present invention, the plurality of single audio signal is 9 single audio signals, and these 9 single audio signals are positioned at 2010MHz～2025MHz frequency range, the initial phase θ of each single audio signal₀All identical, the bandwidth of these 9 single audio signals is 1.6MHz, and the frequency of these 9 single audio signals is arithmetic progression, and the tolerance of described arithmetic progression is 0.2MHz.

In a second embodiment of the present invention, the plurality of single audio signal is 17 single audio signals, and these 17 single audio signals are positioned at 2010MHz～2025MHz frequency range, the initial phase θ of each single audio signal₀All identical, the bandwidth of these 17 single audio signals is 1.6MHz, and the frequency of these 17 single audio signals is also arithmetic progression, and the tolerance of described arithmetic progression is 0.1MHz.

In the 3rd embodiment of the present invention, the plurality of single audio signal is 33 single audio signals, and these 33 single audio signals are positioned at 2010MHz～2025MHz frequency range, the initial phase θ of each single audio signal₀All identical, the bandwidth of these 33 single audio signals is 1.6MHz, and the frequency of these 33 single audio signals is also arithmetic progression, and the tolerance of described arithmetic progression is 0.05MHz.

It should be noted that as long as the multiple single audio signals provided are positioned at 2010MHz～2025MHz frequency range, the bandwidth of the plurality of single audio signal is the 1.6MHz condition that can meet the present invention, should too not limit the scope of the invention at this.

In described step S2, described TD-SCDMA terminal radio frequency receives link and the single audio signal received is processed, and obtains signal in the same direction corresponding to each described single audio signal and orthogonal signalling.

As it was previously stated, described TD-SCDMA terminal radio frequency receives link generally comprises the frequency mixer for down-converted and the analog-digital converter for analog digital conversion.Specifically, the described TD-SCDMA terminal radio frequency reception link single audio signal to receiving carries out process and includes carrying out down-converted and analog-to-digital conversion process, and is further processed obtaining signal in the same direction corresponding to each described single audio signal and orthogonal signalling.

In other embodiments of the invention, described TD-SCDMA terminal radio frequency receives the link single audio signal to receiving also can be amplified process and Filtering Processing etc., and it is without departure from the spirit of the present invention.

In described step S3, the single audio signal that described TD-SCDMA terminal radio frequency reception link is received is ranked up from small to large or from big to small by frequency, thus obtaining the single audio signal that frequency size is adjacent between two, it is possible to further the single audio signal after sequence is numbered in order.

Then, it is necessary to the group delay that single audio signal adjacent between two after obtaining sequence is corresponding, its theoretical basis is as follows:

For receiving link, when the impulse response of system is H (ω), it may be assumed that

H (ω)=G (ω) e^jθ(ω),

Wherein: G (ω) is amplitude response, θ (ω) is phase response, and ω is signal frequency.

The group delay D (ω) then receiving link is just:

$D\left(\mathrm{\ω}\right)=-\frac{d}{\mathrm{d\ω}}\mathrm{\θ}\left(\mathrm{\ω}\right).$

Therefore to obtain group delay, it is necessary to obtain phase response θ (ω).For receiving link radio frequency signals, when the phase place of input signal is θ₀, when the phase response of radio frequency part is θ (ω), then export the phase theta of signal_yIt is just:

${\mathrm{\θ}}_y=\arctan \left(\frac{Q\left(t\right)}{I\left(t\right)}\right)={\mathrm{\θ}}_0+\mathrm{\θ}\left(\mathrm{\ω}\right),$

Wherein: Q (t) is the orthogonal signalling of this single audio signal, I (t) is the signal in the same direction of this single audio signal.Thus the phase response θ of radio frequency part (ω) is just:

$\mathrm{\θ}\left(\mathrm{\ω}\right)=\arctan \left(\frac{Q\left(t\right)}{I\left(t\right)}\right)-{\mathrm{\θ}}_0,$

Initial phase θ due to each described single audio signal₀All identical, and the frequency of the plurality of single audio signal is arithmetic progression, the TD-SCDMA terminal radio frequency that single audio signal that therefore frequency is adjacent between two is corresponding receives the group delay difference equal to its phase response of link, and namely group delay can be obtained by below equation:

$D\left({\mathrm{\ω}}_{n,n+1}\right)=\mathrm{\θ}\left({\mathrm{\ω}}_n\right)-\mathrm{\θ}\left({\mathrm{\ω}}_{n+1}\right)=\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1},$

Wherein, D (ω_{N, n+1}) the TD-SCDMA terminal radio frequency corresponding with (n+1)th single audio signal that be the n-th single audio signal receive the group delay of link,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

It should be noted that when the initial phase of each described single audio signal differs, still without departing from the spirit of the present invention, group delay formula simply now needs the difference of the initial phase of the single audio signal considering that frequency is adjacent between two.

Orthogonal signalling that described single audio signal is corresponding and in the same direction signal obtain in step s 2.Therefore, the group delay of the single audio signal that frequency size described in the present embodiment is adjacent between two is obtained by below equation:

$D\left({\mathrm{\ω}}_{n,n+1}\right)=\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1},$

Wherein, D (ω_{N, n+1}) the TD-SCDMA terminal radio frequency corresponding with (n+1)th single audio signal that be the n-th single audio signal receive the group delay of link,It is the arc-tangent value of orthogonal signalling that the n-th single audio signal is corresponding and the ratio of signal in the same direction,It it is the arc-tangent value of orthogonal signalling that (n+1)th single audio signal is corresponding and the ratio of signal in the same direction.

It should be noted that; the step that the single audio signal that described TD-SCDMA terminal radio frequency reception link is received is ranked up by frequency size; can perform before step S2; can also perform upon step s 2; as long as completing to sort before calculating group delay, should not limit the scope of the invention at this.

In described step S4, the maximum difference of described group delay is received the Group Delay Ripple of link by the present embodiment as TD-SCDMA terminal radio frequency, therefore the Group Delay Ripple obtaining TD-SCDMA terminal radio frequency reception link described in includes: extracting maximum and the minima of described group delay, the difference of described maximum and described minima receives the Group Delay Ripple of link as TD-SCDMA terminal radio frequency.

Shown in Figure 2, below for 17 single audio signals, obtain the process that TD-SCDMA terminal radio frequency receives the Group Delay Ripple of link, comprise the following steps:

nullS11，Receive link to TD-SCDMA terminal radio frequency and send 2016.6MHz、2016.7MHz、2016.8MHz、2016.9MHz、2017.0MHz、2017.1MHz、2017.2MHz、2017.3MHz、2017.4MHz、2017.5MHz、2017.6MHz、2017.7MHz、2017.8MHz、2017.9MHz、2018.0MHz、2018.1MHz and 2018.2MHz totally 17 single audio signals，These 17 single audio signal frequencies centered by 2017.4MHz are positioned at 2010MHz～2025MHz frequency range，The initial phase θ of each single audio signal₀All identical, and the bandwidth of these 17 single audio signals is 1.6MHz.

It can be seen that the frequency of above-mentioned 17 single audio signals is arithmetic progression, and the tolerance of described arithmetic progression is 0.1MHz.

S21, described TD-SCDMA terminal radio frequency receives link and 17 single audio signals is carried out down-converted and analog-to-digital conversion process respectively, obtain (In-phase) in the same direction signal I (t) corresponding to each described single audio signal and orthogonal (Quadrate) signal Q (t), i.e. y (t)=I (t)+jQ (t).

S31,17 single audio signals that described TD-SCDMA terminal radio frequency reception link is received are ranked up from small to large according to frequency and number, and can be namely 1 to 17 by 2016.6MHz, 2016.7MHz, 2016.8MHz, 2016.9MHz, 2017.0MHz, 2017.1MHz, 2017.2MHz, 2017.3MHz, 2017.4MHz, 2017.5MHz, 2017.6MHz, 2017.7MHz, 2017.8MHz, 2017.9MHz, 2018.0MHz, 2018.1MHz and 2018.2MHz number consecutively.

S32, the group delay that single audio signal adjacent between two after calculating sequence as follows is corresponding:

$D\left({\mathrm{\ω}}_{n,n+1}\right)=\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1},$

Wherein, D (ω_{N, n+1}) the TD-SCDMA terminal radio frequency corresponding with (n+1)th single audio signal that be the n-th single audio signal receive the group delay of link,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

So far the group delay of 16 pairs of adjacent between two single audio signals of the present embodiment frequency is obtained.Fig. 3 show the result schematic diagram of 16 group delays of the present embodiment.Referring to Fig. 3, as: the TD-SCDMA terminal radio frequency that the single audio signal (namely frequency is the single audio signal of 2016.6MHz) being numbered 1 in the present embodiment is corresponding with the single audio signal (namely frequency is the single audio signal of 2016.7MHz) being numbered 2 receives the group delay D (ω of link_1,2) for 39ns, the TD-SCDMA terminal radio frequency that the single audio signal (namely frequency is the single audio signal of 2018.1MHz) being numbered 16 is corresponding with the single audio signal (namely frequency is the single audio signal of 2018.2MHz) being numbered 17 receives the group delay D (ω of link_16,17) for 14ns.

S41, extracts the maximum of described group delay and the minima of described group delay.

Referring again to Fig. 3, the maximum of group delay described in the present embodiment is 180ns, and the minima of described group delay is 14ns.

S42, the difference calculating described maximum and described minima receives the Group Delay Ripple of link as TD-SCDMA terminal radio frequency.

Calculating the difference obtaining 180ns and 14ns in the present embodiment is 166ns, then TD-SCDMA terminal radio frequency receives the Group Delay Ripple of link is exactly 166ns.

So far adopt simple method to obtain TD-SCDMA terminal radio frequency and receive the Group Delay Ripple of link, such that it is able to type selecting and design for radio-frequency devices and circuit provide foundation, systematic function may finally be improved.

Correspondingly, present invention also offers a kind of time divided network terminal radio frequency and receive the Group Delay Ripple measurement system of link, including:

Radio-frequency signal source, sends the multiple single audio signals in time divided network terminal works frequency range for receiving link to time divided network terminal radio frequency, and the bandwidth of the plurality of single audio signal is identical with the bandwidth of described time divided network；

Described time divided network terminal radio frequency receives link and the plurality of single audio signal is processed, and obtains signal in the same direction and the orthogonal signalling of each described single audio signal；

Group delay computing unit, for described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

Group Delay Ripple computing unit, receives described group delay, obtains time divided network terminal radio frequency and receives the Group Delay Ripple of link.

Hereinafter still illustrate for TD-SCDMA terminal for time divided network terminal, but it is not intended to protection scope of the present invention.

Shown in Figure 4, present embodiment additionally provides a kind of TD-SCDMA terminal radio frequency and receives the Group Delay Ripple measurement system of link, including:

Radio-frequency signal source 100, receives link 400 to TD-SCDMA terminal radio frequency and sends the multiple single audio signals in TD-SCDMA terminal works frequency range, and the bandwidth of the plurality of single audio signal is 1.6MHz；

Described TD-SCDMA terminal radio frequency receives link 400 and the plurality of single audio signal is processed, and obtains signal in the same direction and the orthogonal signalling of each described single audio signal；

Group delay computing unit 200, for described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

Group Delay Ripple computing unit 300, receives described group delay, obtains TD-SCDMA terminal radio frequency and receives the Group Delay Ripple of link.

Preferably, the initial phase of the plurality of single audio signal is identical.

Specifically, the frequency of multiple single audio signals that described radio-frequency signal source 100 provides is arithmetic progression.Alternatively, the plurality of single audio signal is (1+8N) individual single audio signal, and the tolerance of described arithmetic progression is (0.2/N) MHz, and wherein, N is the integer more than or equal to 1.

Further, described TD-SCDMA terminal radio frequency reception link 400 includes:

Frequency mixer 410, carries out down-converted to the described single audio signal received, obtains down-conversion signal；

Analog-digital converter 420, carries out analog-to-digital conversion process, and processes the signal in the same direction and the orthogonal signalling that obtain each described single audio signal described down-conversion signal.

Specifically, described TD-SCDMA terminal radio frequency receives link 400 and can also include: amplifier (not shown), for being amplified described single audio signal processing；Analog filter (not shown), for being filtered described single audio signal processing.

Specifically, described group delay computing unit 200 includes:

Sequencing unit 210, the single audio signal received for described TD-SCDMA terminal radio frequency receives link 400 is ranked up by frequency size；

Computing unit 220, for according to formula $D\left({\mathrm{\ω}}_{n,n+1}\right)=\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-\arctan {\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1}$ Obtain group delay corresponding with single audio signal adjacent between two after being ranked up by frequency size, wherein, D (ω_{N, n+1}) be the n-th single audio signal and (n+1)th single audio signal TD-SCDMA terminal radio frequency receive link group delay,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

Specifically, the single audio signal that described TD-SCDMA terminal radio frequency reception link is received by described sequencing unit 210 is ranked up from small to large or from big to small by frequency.

Specifically, shown in Figure 5, described Group Delay Ripple computing unit 300 includes:

It is worth most extraction unit 310, is used for receiving described group delay, extracts maximum and the minima of described group delay；

Subtrator 320, for receiving maximum and the minima of described group delay, calculates described maximum and the difference of described minima, and the difference of described maximum and described minima receives the Group Delay Ripple of link 400 as TD-SCDMA terminal radio frequency.

So far, the device of simple in construction is adopted to obtain the Group Delay Ripple of time divided network end radio frequency reception link.

Disclose as above with preferred embodiment although the present invention is own, but the present invention is not limited to this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.

Claims (10)

1. the Group Delay Ripple measuring method of a time divided network terminal radio frequency reception link, it is characterised in that including:

Receiving link to time divided network terminal radio frequency and send the multiple single audio signals in time divided network terminal works frequency range, the bandwidth of the plurality of single audio signal is identical with the bandwidth of described time divided network；

Described time divided network terminal radio frequency receives link and the single audio signal received is processed, and obtains signal in the same direction corresponding to each described single audio signal and orthogonal signalling；

Described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

According to described group delay, obtain time divided network terminal radio frequency and receive the Group Delay Ripple of link；The described Group Delay Ripple obtaining time divided network terminal radio frequency reception link includes: extracting maximum and the minima of described group delay, the difference of described maximum and described minima receives the Group Delay Ripple of link as time divided network terminal radio frequency；

The initial phase of the plurality of single audio signal is identical；

The group delay that single audio signal adjacent between two after described acquisition sequence is corresponding is obtained by below equation:

$D\left({\mathrm{\ω}}_{n,n+1}\right)=arctan{\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-arctan{\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1},$

Wherein, D (ω_n,n+1) the time divided network terminal radio frequency corresponding with (n+1)th single audio signal that be the n-th single audio signal receive the group delay of link,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

2. time divided network terminal radio frequency as claimed in claim 1 receives the Group Delay Ripple measuring method of link, it is characterised in that described time divided network includes TD-SCDMA or LTE.

3. time divided network terminal radio frequency as claimed in claim 1 receives the Group Delay Ripple measuring method of link, it is characterised in that the frequency of the plurality of single audio signal is arithmetic progression.

4. time divided network terminal radio frequency as claimed in claim 3 receives the Group Delay Ripple measuring method of link, it is characterized in that, the plurality of single audio signal is (1+8N) individual single audio signal, and the tolerance of described arithmetic progression is (0.2/N) MHz, wherein, N is the integer more than or equal to 1.

5. time divided network terminal radio frequency as claimed in claim 4 receives the Group Delay Ripple measuring method of link, it is characterised in that the plurality of single audio signal is 9 single audio signals, and the tolerance of described arithmetic progression is 0.2MHz.

6. time divided network terminal radio frequency as claimed in claim 4 receives the Group Delay Ripple measuring method of link, it is characterised in that the plurality of single audio signal is 17 single audio signals, and the tolerance of described arithmetic progression is 0.1MHz.

7. time divided network terminal radio frequency as claimed in claim 4 receives the Group Delay Ripple measuring method of link, it is characterised in that the plurality of single audio signal is 33 single audio signals, and the tolerance of described arithmetic progression is 0.05MHz.

8. time divided network terminal radio frequency as claimed in claim 1 receives the Group Delay Ripple measuring method of link, it is characterized in that, the described time divided network terminal radio frequency reception link single audio signal to receiving carries out process and includes being sequentially carried out down-converted and analog-to-digital conversion process.

9. the Group Delay Ripple of a time divided network terminal radio frequency reception link measures system, it is characterised in that including:

Radio-frequency signal source, sends the multiple single audio signals in time divided network terminal works frequency range for receiving link to time divided network terminal radio frequency, and the bandwidth of the plurality of single audio signal is identical with the bandwidth of described time divided network；

Described time divided network terminal radio frequency receives link and the plurality of single audio signal is processed, and obtains signal in the same direction and the orthogonal signalling of each described single audio signal；

Group delay computing unit, for described single audio signal is ranked up by frequency size, the group delay that single audio signal adjacent between two after obtaining sequence is corresponding；

Group Delay Ripple computing unit, receives described group delay, obtains time divided network terminal radio frequency and receives the Group Delay Ripple of link；Described Group Delay Ripple computing unit includes: be worth extraction unit most, receives described group delay, extracts maximum and the minima of described group delay；Subtrator, receives maximum and the minima of described group delay, calculates described maximum and the difference of described minima, and the difference of described maximum and described minima receives the Group Delay Ripple of link as time divided network terminal radio frequency；

The initial phase of the plurality of single audio signal is identical and frequency is arithmetic progression, and described group delay computing unit includes:

Sequencing unit, the single audio signal received for described time divided network terminal radio frequency receives link is ranked up by frequency size；

Computing unit, for according to formula $D\left({\mathrm{\ω}}_{n,n+1}\right)=arctan{\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_n-arctan{\left(\frac{Q\left(t\right)}{I\left(t\right)}\right)}_{n+1}$ Obtain group delay corresponding with single audio signal adjacent between two after being ranked up by frequency size, wherein, D (ω_n,n+1) be the n-th single audio signal and (n+1)th single audio signal time divided network terminal radio frequency receive link group delay,It is the arc-tangent value of the orthogonal signalling corresponding with the n-th single audio signal and the ratio of signal in the same direction,It it is the arc-tangent value of the orthogonal signalling corresponding with (n+1)th single audio signal and the ratio of signal in the same direction.

10. time divided network terminal radio frequency as claimed in claim 9 receives the Group Delay Ripple measurement system of link, it is characterised in that described time divided network terminal radio frequency receives link and includes:

Frequency mixer, for the described single audio signal received is carried out down-converted, obtains down-conversion signal；

Analog-digital converter, carries out analog-to-digital conversion process to described down-conversion signal, obtains signal in the same direction and the orthogonal signalling of each described single audio signal.