CN105634626B - The measurement method and system of channel quality indicator in space time transmit diversity system - Google Patents
The measurement method and system of channel quality indicator in space time transmit diversity system Download PDFInfo
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Abstract
The present invention provides a kind of measurement method of channel quality indicator in space time transmit diversity system, comprising: receives the first data of a P-CPICHWith the second dataAnd equilibrium is carried out, the second data de-scrambling after the first data and equilibrium after equilibrium is de-spread, the first data after obtaining descrambling and de-spreadingWith the second data after descrambling and de-spreadingIt willWithClassification, which is carried out, by P-CPICH symbol pattern merges the first merging data { d' of generationk,1And the second merging data { d'k,2}；WhenWithIt is identical, { d'k,1Be{d'k,2It is zero；WhenWithIt is different, { d'k,1It is zero, { d'k,2BeAccording to { d'k,1And { d'k,2The first demodulation SINR ratio and the second demodulation SINR are generated, and it is averaging and generates Primary Common Pilot Channel demodulation SINR；The demodulation SINR of HS-PDSCH is generated according to the demodulation SINR of P-CPICH；Channel quality indicator is obtained according to the interval metrics of the demodulation SINR of HS-PDSCH.
Description
Technical field
The present invention relates to wireless communication technology field, in particular to channel quality indicates in a kind of space time transmit diversity system
The measurement method and system of symbol.
Background technique
Wireless channel is the multidiameter fading channel of a time to time change.To efficiently use frequency spectrum resource, data are realized
High-speed transfer, HSDPA system (high speed descending grouping access system, High Speed Downlink Packet Acess) are supported
Adaptive modulation and coding.That is, terminal is by obtaining downlink reception data HS-PDSCH (High Speed
Physical Downlink Shared Channel) demodulation Signal to Interference plus Noise Ratio (SINR, Signal to Interference
Noise Ratio), to one 5 bit of base station feedback channel quality indicator (Channel Quality Indicator,
CQI), it is used to indicate the quality of current downlink channel.Base station can adjust transport block size, HS-PDSCH code channel number according to CQI
And modulation system etc..
The acquisition of the demodulation SINR of HS-PDSCH can use HS-PDSCH data and be estimated, it is total also to can use Your Majesty
Pilot channel P-CPICH (Primary Common Pilot Channel) data are estimated.In view of HS-PDSCH data
It is not to continuously transmit, and CQI feedback needs to feed back always after establishing the link, so current mainstream scheme is to utilize P-
CPICH data carry out the estimation of demodulation SINR.
In addition, diversity technique is one of the effective means to anti-multipath fading.Therefore, HSDPA system is in addition to supporting Dan Tian
Line sending mode, also support space time transmit diversity (Space Time Transmit Diversity, STTD) mode.STTD is
Refer to and Alamouti coding is carried out to the transmission data of two antennas, so that it is orthogonal for keeping the transmission data of two antennas.If certain
One physical channel uses STTD mode, then the symbol pattern of P-CPICH is as shown in Figure 1.In a time slot, every antenna is each
There are 10 P-CPICH symbols.Assuming that two antennas transmission P-CPICH data areWith(k=1,2,3 ..., N, N are meter
Calculate demodulation the taken P-CPICH symbol lengths of SINR).Obviously,Or-A.
In the prior art, the method using P-CPICH DATA REASONING STTD system CQI feedback value is as follows:
1) balanced to signal progress is received, eliminate the influence of multipath effect；
2) data after two antenna equalisations are directed to P-CPICH descrambling and de-spreading, the data after obtaining P-CPICH descrambling and de-spreadingWith
3) willWithMerge as follows:
4) due to the P-CPICH data of transmission it is known that following maximal possibility estimation formula, which can be used, calculates P-CPICH's
Demodulate SINR:
Wherein, Re (x) indicates to take the real part of x, and Im (x) indicates to take the imaginary part of x.
5) the demodulation SINR of P-CPICH is converted to the demodulation SINR to HS-PDSCH as follows:
SINRHS-PDSCH=SINRCPICH+Γ+Δ (4)
Wherein, measurement power offset values Γ is indicated that reference power adjusted value is determined by terminal class by high-level signaling.
6) interval metrics of SINR are demodulated according to HS-PDSCH, terminal is to the corresponding CQI value of base station feedback.
In systems in practice, the phase difference of two transmission antennas is unknown.For awgn channel, when the phase of two transmission antennas
When potential difference is 0 degree, if the P-CPICH symbol sent isThe then only noise that receiving end receives, this
When corresponding d'kFor a value of zero crossings.Therefore, the CQI value of terminal to base station feedback is less than normal.
Similarly, when the phase difference of two transmission antennas is 180 degree, if the P-CPICH symbol sent isWhat then receiving end received only has noise, at this time corresponding d'kFor a value of zero crossings.Therefore,
The CQI value of terminal to base station feedback is also less than normal.
Only when the phase difference for sending two antennas is 90 degree or 270 degree, terminal can be accurately to base station feedback CQI
Value.
Summary of the invention
The purpose of the present invention is to provide a kind of measurement method of channel quality indicator in space time transmit diversity system and
System only has the phase for working as two transmission antennas to solve the measurement method of channel quality indicator in existing space time transmit diversity system
When potential difference is 90 degree or 270 degree, the problem of value of terminal accurate feedback channel quality indicator can be made.
In order to solve the above technical problems, the present invention provides a kind of survey of channel quality indicator in space time transmit diversity system
Amount method, comprising:
It receives the first data of a Primary Common Pilot Channel and the second data and carries out equilibrium, by the first data after equilibrium
With the second data de-scrambling despreading after equilibrium, the first data after obtaining descrambling and de-spreading and the second data after descrambling and de-spreading；
The first data after descrambling and de-spreading and the second data after descrambling and de-spreading are pressed into the Primary Common Pilot Channel symbol
Pattern carries out classification and merges the first merging data of generation and the second merging data；
The first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio are generated according to the first merging data and the second merging data；
First demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio are averaging and generate Primary Common Pilot Channel demodulation Signal to Interference plus Noise Ratio；
Signal to Interference plus Noise Ratio, which is demodulated, according to Primary Common Pilot Channel generates high-speed physical downlink shared channel (HS-PDSCH) demodulation Signal to Interference plus Noise Ratio；Root
Channel quality indicator is obtained according to the interval metrics of high-speed physical downlink shared channel (HS-PDSCH) demodulation Signal to Interference plus Noise Ratio.
Further, in the space time transmit diversity system in the measurement method of channel quality indicator, when first
Data are identical with the second data, the first merging data be descrambling and de-spreading after the first data and descrambling and de-spreading after the second data it
With the second merging data is zero；When the first data and the second data are different, the first merging data is zero, and the second merging data is
The difference of the first data after descrambling and de-spreading and the second data after descrambling and de-spreading；
Further, in the space time transmit diversity system in the measurement method of channel quality indicator, according to
One merging data and the second merging data generate the first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio is obtained by following formula
:
Wherein, Re (d'k,1) indicate the first merging data real part；Im(d'k,1) indicate the first merging data imaginary part；Re
(d'k,2) indicate the second merging data real part；Im(d'k,2) indicate the second merging data imaginary part；Indicate descrambling and de-spreading
The first data afterwards；The second data after indicating descrambling and de-spreading；K=1,2,3,4 ... N；N is positive integer.
Further, in the space time transmit diversity system in the measurement method of channel quality indicator, to first
Demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio are averaging generation Primary Common Pilot Channel demodulation Signal to Interference plus Noise Ratio and pass through following public affairs
Formula obtains: SINRCPICH=(SINRCPICH,1+SINRCPICH,2)/2。
Further, in the space time transmit diversity system in the measurement method of channel quality indicator, according to master
CPICH Common Pilot Channel demodulates Signal to Interference plus Noise Ratio generation high-speed physical downlink shared channel (HS-PDSCH) demodulation Signal to Interference plus Noise Ratio and passes through following formula acquisition:
SINRHS-PDSCH=SINRCPICH+Γ+Δ；Wherein, Γ indicates measurement power offset values；Δ indicates reference power adjusted value.
Correspondingly, the present invention also provides a kind of measuring system of channel quality indicator in space time transmit diversity system, packet
It includes:
Descrambling and de-spreading module, for receiving the first data of a Primary Common Pilot Channel and the second data and carrying out equilibrium,
The first data and descrambling solution by the second data de-scrambling despreading after the first data and equilibrium after equilibrium, after obtaining descrambling and de-spreading
The second data after expansion；
Data combiners block, for the first data after descrambling and de-spreading and the second data after descrambling and de-spreading to be pressed the master
CPICH Common Pilot Channel symbol pattern carries out classification and merges the first merging data of generation and the second merging data；
Signal to Interference plus Noise Ratio generation module is demodulated, is believed for generating the first demodulation according to the first merging data and the second merging data
It is dry to make an uproar than demodulating Signal to Interference plus Noise Ratio with second；It is total that generation Your Majesty is averaging to the first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio
Pilot channel demodulation Signal to Interference plus Noise Ratio；
Channel quality indicator generation module generates high-speed physical for demodulating Signal to Interference plus Noise Ratio according to Primary Common Pilot Channel
DSCH Downlink Shared Channel demodulates Signal to Interference plus Noise Ratio；Letter is obtained according to the interval metrics that high-speed physical downlink shared channel (HS-PDSCH) demodulates Signal to Interference plus Noise Ratio
Road quality indicator.
Further, in the space time transmit diversity system in the measuring system of channel quality indicator, in data
In merging module, when the first data are identical with the second data, the first merging data is the first data and descrambling after descrambling and de-spreading
The sum of second data after despreading, the second merging data are zero；When the first data and the second data are different, the first merging data is
Zero, the second merging data be descrambling and de-spreading after the first data and the second data after descrambling and de-spreading difference；
Further, it is being demodulated in the measuring system of channel quality indicator in the space time transmit diversity system
In Signal to Interference plus Noise Ratio generation module, the first demodulation Signal to Interference plus Noise Ratio and the second solution are generated according to the first merging data and the second merging data
Signal to Interference plus Noise Ratio is adjusted to obtain by following formula:
Wherein, Re (d'k,1) indicate the first merging data real part；Im(d'k,1) indicate the first merging data imaginary part；Re
(d'k,2) indicate the second merging data real part；Im(d'k,2) indicate the second merging data imaginary part；Indicate descrambling and de-spreading
The first data afterwards；The second data after indicating descrambling and de-spreading；K=1,2,3,4 ... N；N is positive integer.
Further, it is being demodulated in the measuring system of channel quality indicator in the space time transmit diversity system
In Signal to Interference plus Noise Ratio generation module, the first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio are averaging and generate primary common pilot letter
Road demodulates Signal to Interference plus Noise Ratio and is obtained by following formula: SINRCPICH=(SINRCPICH,1+SINRCPICH,2)/2。
Further, in the space time transmit diversity system in the measuring system of channel quality indicator, in channel
In quality indicator generation module, Signal to Interference plus Noise Ratio is demodulated according to Primary Common Pilot Channel and generates high-speed physical downlink shared channel (HS-PDSCH) solution
Signal to Interference plus Noise Ratio is adjusted to obtain by following formula: SINRHS-PDSCH=SINRCPICH+Γ+Δ；Wherein, Γ indicates measurement power excursion
Value；Δ indicates reference power adjusted value.
The measurement method and system of channel quality indicator in space time transmit diversity system provided by the invention have following
The utility model has the advantages that for two transmission antennas of random phase difference, by respectively to the P-CPICH sign computation after two groups of descrambling and de-spreadings
It demodulates SINR, is then averaged, the final demodulation SINR for calculating HS-PDSCH, and accurately to base station feedback CQI value.
Detailed description of the invention
Fig. 1 is the P-CPICH symbol pattern schematic diagram under existing space time transmit diversity mode；
Fig. 2 is the measuring method flow chart of channel quality indicator in the space time transmit diversity system of the embodiment of the present invention.
Specific embodiment
Channel quality in space time transmit diversity system proposed by the present invention is indicated below in conjunction with the drawings and specific embodiments
The measurement method and system of symbol are described in further detail.According to following explanation and claims, advantages of the present invention and spy
Sign will become apparent from.It should be noted that attached drawing is all made of very simplified form and using non-accurate ratio, only to side
Just, the purpose of the embodiment of the present invention is lucidly aided in illustrating.
As shown in Figure 1, the P-CPICH symbol pattern of STTD system, which can be divided into two groups: one groups, is
Another group isObviously, two groups of P-CPICH symbols are mixed calculate its demodulate SINR close not to the utmost
Reason.Main idea is that calculating separately it to the P-CPICH symbol after two groups of descrambling and de-spreadings demodulates SINR, then carry out
It is average.
For STTD system, referring to FIG. 2, the present invention provides channel quality indicator in a kind of space time transmit diversity system
Measurement method, comprising:
Step 1: the first data of a Primary Common Pilot Channel P-CPICH are receivedWith the second dataIt goes forward side by side
Row is balanced, to eliminate the influence of multipath effect；
Step 2: the second data de-scrambling after the first data and equilibrium after equilibrium is de-spread, after obtaining descrambling and de-spreading
First dataWith the second data after descrambling and de-spreading
Step 3: by the first data after descrambling and de-spreadingWith the second data after descrambling and de-spreadingBy the master
CPICH Common Pilot Channel P-CPICH symbol pattern (as shown in Figure 1) carries out classification and merges the first merging data { d' of generationk,1And the
Two merging datas
Specifically, when the first dataWith the second dataIt is identical, i.e.,First closes
And data { d'k,1Be descrambling and de-spreading after the first dataWith the second data after descrambling and de-spreadingThe sum of, second
Merging data { d'k,2It is zero；When the first dataWith the second dataIt is different, i.e.,First
Merging dataIt is zero, the second merging data { d'k,2Be descrambling and de-spreading after the first dataAfter descrambling and de-spreading
Second dataDifference；
I.e.
Wherein, k takes positive integer；A indicates the first data, the amplitude of the second data.
Step 4: according to the first merging dataWith the second merging data { d'k,2Passed through using maximal possibility estimation
Following formula generates the first demodulation Signal to Interference plus Noise Ratio SINR respectivelyCPICH,1With the second demodulation Signal to Interference plus Noise Ratio SINRCPICH,2；
Wherein, Re (d'k,1) indicate the first merging data real part；Im(d'k,1) indicate the first merging data imaginary part；Re
(d'k,2) indicate the second merging data real part；Im(d'k,2) indicate the second merging data imaginary part；K=1,2,34 ... N；N is
Positive integer indicates to calculate demodulation the taken P-CPICH symbol lengths of SINR.
Step 5: to the first demodulation Signal to Interference plus Noise Ratio SINRCPICH,1The dry SINR that makes an uproar is believed with the second demodulationCPICH,2It is given birth to than being averaging
At the demodulation Signal to Interference plus Noise Ratio SINR of Primary Common Pilot ChannelCPICH；That is SINRCPICH=(SINRCPICH,1+SINRCPICH,2)/2。
Step 6: Signal to Interference plus Noise Ratio SINR is demodulated according to Primary Common Pilot ChannelCPICHHigh-speed physical is arrived in conversion as follows
The demodulation Signal to Interference plus Noise Ratio SINR of DSCH Downlink Shared ChannelHS-PDSCH: SINRHS-PDSCH=SINRCPICH+ Γ+Δ, wherein Γ indicates measurement
Power offset values are indicated by high-level signaling；Δ indicates reference power adjusted value, is determined by terminal class.
Step 7: Signal to Interference plus Noise Ratio SINR is demodulated according to high-speed physical downlink shared channel (HS-PDSCH)HS-PDSCHInterval metrics, terminal to
The corresponding channel quality indicator CQI of base station feedback.
Correspondingly, the present invention also provides a kind of measuring system of channel quality indicator in space time transmit diversity system, packet
It includes:
Descrambling and de-spreading module, for receiving the first data of a Primary Common Pilot Channel and the second data and carrying out equilibrium,
The first data and descrambling solution by the second data de-scrambling despreading after the first data and equilibrium after equilibrium, after obtaining descrambling and de-spreading
The second data after expansion；
Data combiners block, for the first data after descrambling and de-spreading and the second data after descrambling and de-spreading to be pressed the master
CPICH Common Pilot Channel symbol pattern carries out classification and merges the first merging data of generation and the second merging data；When the first data and
Two data are identical, and the first merging data is the first data after descrambling and de-spreading and the sum of second data after descrambling and de-spreading, and second
Merging data is zero；When the first data and the second data are different, the first merging data is zero, and the second merging data is descrambling and de-spreading
The difference of the second data after rear the first data and descrambling and de-spreading；
I.e.
Wherein, k takes positive integer；A indicates the first data, the amplitude of the second data.
Signal to Interference plus Noise Ratio generation module is demodulated, for estimating according to the first merging data and the second merging data using maximum likelihood
Meter generates the first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio by following formula respectively；To first demodulation Signal to Interference plus Noise Ratio and
Second demodulation Signal to Interference plus Noise Ratio, which is averaging, generates Primary Common Pilot Channel demodulation Signal to Interference plus Noise Ratio；
SINRCPICH=(SINRCPICH,1+SINRCPICH,2)/2；
Wherein, Re (d'k,1) indicate the first merging data real part；Im(d'k,1) indicate the first merging data imaginary part；Re
(d'k,2) indicate the second merging data real part；Im(d'k,2) indicate the second merging data imaginary part；K=1,2,3,4 ... N；N is
Positive integer indicates to calculate demodulation the taken P-CPICH symbol lengths of SINR.
Channel quality indicator generation module generates high-speed physical for demodulating Signal to Interference plus Noise Ratio according to Primary Common Pilot Channel
DSCH Downlink Shared Channel demodulates Signal to Interference plus Noise Ratio: SINRHS-PDSCH=SINRCPICH+Γ+Δ；Wherein, Γ indicates measurement power offset values；
Δ indicates reference power adjusted value.Channel matter is obtained according to the interval metrics that high-speed physical downlink shared channel (HS-PDSCH) demodulates Signal to Interference plus Noise Ratio
Measure indicator.
Base this, for two transmission antennas of random phase difference, by respectively to the P-CPICH symbol after two groups of descrambling and de-spreadings
It calculates it and demodulates SINR, be then averaged, the final demodulation SINR for calculating HS-PDSCH, and accurately to base station feedback CQI
Value.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (10)
1. the measurement method of channel quality indicator in a kind of space time transmit diversity system characterized by comprising
It receives the first data of a Primary Common Pilot Channel and the second data and carries out equilibrium, by the first data after equilibrium and
The second data de-scrambling despreading after weighing apparatus, the first data after obtaining descrambling and de-spreading and the second data after descrambling and de-spreading；
The first data after descrambling and de-spreading and the second data after descrambling and de-spreading are pressed into the Primary Common Pilot Channel symbol pattern
It carries out classification and merges the first merging data of generation and the second merging data；
The first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio are generated according to the first merging data and the second merging data；To
One demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio, which are averaging, generates Primary Common Pilot Channel demodulation Signal to Interference plus Noise Ratio；
Signal to Interference plus Noise Ratio, which is demodulated, according to Primary Common Pilot Channel generates high-speed physical downlink shared channel (HS-PDSCH) demodulation Signal to Interference plus Noise Ratio；According to height
The interval metrics of fast Physical Downlink Shared Channel demodulation Signal to Interference plus Noise Ratio obtain channel quality indicator.
2. the measurement method of channel quality indicator in space time transmit diversity system as described in claim 1, which is characterized in that
When the first data are identical with the second data, the first merging data is the first data after descrambling and de-spreading and second after descrambling and de-spreading
The sum of data, the second merging data are zero；When the first data and the second data are different, the first merging data is zero, and second merges
Data be descrambling and de-spreading after the first data and the second data after descrambling and de-spreading difference.
3. the measurement method of channel quality indicator in space time transmit diversity system as described in claim 1, which is characterized in that
Passed through according to the first merging data and the first demodulation Signal to Interference plus Noise Ratio of the second merging data generation and the second demodulation Signal to Interference plus Noise Ratio following
Formula obtains:
Wherein, Re (d'k,1) indicate the first merging data real part；Im(d'k,1) indicate the first merging data imaginary part；Re
(d'k,2) indicate the second merging data real part；Im(d'k,2) indicate the second merging data imaginary part；Indicate descrambling and de-spreading
The first data afterwards；The second data after indicating descrambling and de-spreading；K=1,2,3,4 ... N；N is positive integer.
4. the measurement method of channel quality indicator in space time transmit diversity system as claimed in claim 3, which is characterized in that
Generation Primary Common Pilot Channel demodulation Signal to Interference plus Noise Ratio is averaging to the first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio to pass through
Following formula obtains: SINRCPICH=(SINRCPICH,1+SINRCPICH,2)/2。
5. the measurement method of channel quality indicator in space time transmit diversity system as claimed in claim 4, which is characterized in that
Signal to Interference plus Noise Ratio generation high-speed physical downlink shared channel (HS-PDSCH) demodulation Signal to Interference plus Noise Ratio, which is demodulated, according to Primary Common Pilot Channel passes through following public affairs
Formula obtains: SINRHS-PDSCH=SINRCPICH+Γ+Δ；Wherein, Γ indicates measurement power offset values；Δ indicates reference power adjustment
Value.
6. the measuring system of channel quality indicator in a kind of space time transmit diversity system characterized by comprising
Descrambling and de-spreading module will be equal for receiving the first data of a Primary Common Pilot Channel and the second data and carrying out equilibrium
The second data de-scrambling after the first data and equilibrium after weighing apparatus is de-spread, after the first data and descrambling and de-spreading after obtaining descrambling and de-spreading
The second data；
Data combiners block, for being total to the first data after descrambling and de-spreading and the second data after descrambling and de-spreading by the Your Majesty
Pilot channel symbols pattern carries out classification and merges the first merging data of generation and the second merging data；
Signal to Interference plus Noise Ratio generation module is demodulated, the first demodulation letter is dry to make an uproar for generating according to the first merging data and the second merging data
Than demodulating Signal to Interference plus Noise Ratio with second；First demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio are averaging and generate primary common pilot
Channel demodulates Signal to Interference plus Noise Ratio；
Channel quality indicator generation module generates high-speed physical downlink for demodulating Signal to Interference plus Noise Ratio according to Primary Common Pilot Channel
Shared channel demodulates Signal to Interference plus Noise Ratio；Channel matter is obtained according to the interval metrics that high-speed physical downlink shared channel (HS-PDSCH) demodulates Signal to Interference plus Noise Ratio
Measure indicator.
7. the measuring system of channel quality indicator in space time transmit diversity system as claimed in claim 6, which is characterized in that
In data combiners block, when the first data are identical with the second data, the first merging data is the first data after descrambling and de-spreading
With the sum of the second data after descrambling and de-spreading, the second merging data is zero；When the first data and the second data are different, first merges
Data are zero, the second merging data be descrambling and de-spreading after the first data and the second data after descrambling and de-spreading difference.
8. the measuring system of channel quality indicator in space time transmit diversity system as claimed in claim 6, which is characterized in that
In demodulation Signal to Interference plus Noise Ratio generation module, according to the first merging data and the second merging data generate the first demodulation Signal to Interference plus Noise Ratio and
Second demodulation Signal to Interference plus Noise Ratio is obtained by following formula:
Wherein, Re (d'k,1) indicate the first merging data real part；Im(d'k,1) indicate the first merging data imaginary part；Re
(d'k,2) indicate the second merging data real part；Im(d'k,2) indicate the second merging data imaginary part；Indicate descrambling and de-spreading
The first data afterwards；The second data after indicating descrambling and de-spreading；K=1,2,3,4 ... N；N is positive integer.
9. the measuring system of channel quality indicator in space time transmit diversity system as claimed in claim 8, which is characterized in that
In demodulation Signal to Interference plus Noise Ratio generation module, it is total that generation Your Majesty is averaging to the first demodulation Signal to Interference plus Noise Ratio and the second demodulation Signal to Interference plus Noise Ratio
Pilot channel demodulation Signal to Interference plus Noise Ratio is obtained by following formula: SINRCPICH=(SINRCPICH,1+SINRCPICH,2)/2。
10. the measuring system of channel quality indicator, feature exist in space time transmit diversity system as claimed in claim 9
In in channel quality indicator generation module, according to Primary Common Pilot Channel demodulation Signal to Interference plus Noise Ratio generation high-speed physical downlink
Shared channel demodulation Signal to Interference plus Noise Ratio is obtained by following formula: SINRHS-PDSCH=SINRCPICH+Γ+Δ；Wherein, Γ indicates to survey
Measure power offset values；Δ indicates reference power adjusted value.
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