CN101640557A - Method and device for adjusting power gain factors of code channel in TD-SCDMA system - Google Patents

Abstract

The invention discloses a method and a device for adjusting power gain factors of a code channel in a TD-SCDMA system. The method comprises the following steps: judging the sending code channel numberof an uplink sending subsystem; determining the power gain factor of a data part in each code channel, and carrying out standard multi-bit quantization for the power gain factor; and determining thepower gain factor of a training sequence code part in each code channel, and carrying out standard multi-bit quantization for the power gain factor. The device comprises a judging module, a first power gain factor determining module, a first quantization module, a second power gain factor determining module and a second quantization module. The method and the device solve the problem that the digital realization in specific hardware design is comparatively difficult because the value of the power gain factor is decimal, and can be applied to the specific hardware design and realization quite conveniently.

Description

The power gain factors method of adjustment and the device of code channel in the TD-SCDMA system

Technical field

The present invention relates to wireless communication technology, relate in particular to the power gain factors method of adjustment of code channel in a kind of TD-SCDMA (Time DivisionSynchronous Code Division Multiple Access, TD SDMA) system.

Background technology

In the TD-SCDMA system, up being sent in through needing to carry out the processing of physical channel after the transport layer Channel Processing, physical channel is handled and is comprised steps such as spread spectrum, scrambling, code channel merging, pulse-shaping filtering, sends by carrier wave at last.The up transmission of the standard code of TD-SCDMA is divided into two code channels at most, up transmission subsystem needs earlier each code channel to be carried out spectrum-spreading and scrambling, and two-way is carrying out the step that code channel merges through the up transmission sequence that spectrum-spreading and scrambling is crossed earlier through needing before the transmitting filter.

The general step of only physical channel in the up transmission being handled in the TD-SCDMA standard is illustrated, see also Fig. 1, this figure is the schematic diagram that different code channels merge in the up transmission subsystem of the TD-SCDMA system that stipulates in the existing standard, as seen from the figure, up transmission subsystem carries out at first respectively transmitting of two code channels being carried out power setting when transmitting power is adjusted, then will carry out after the power setting transmit respectively with its separately the power gain factors γ of code channel multiply each other, then transmitting of two code channels carried out code channel and merge, transmitting after merging be multiply by the power gain ratio beta _jQuantized value.Following table is depicted as the value of the power gain factors γ that stipulates in the existing standard and the table of comparisons of the spreading factor SF on the corresponding D PCH (DPCH):

The power gain ratio beta _jThe signaling value can be by network side by signaling UE (subscriber equipment), β _jQuantized value be listed in the following table.Work as β _jQuantized value by calculating β by UE with reference to TFC (transformat combination) _jTo not be restricted to these quantized values.

??β jThe signaling value	??β jQuantized value
		??15	??16/8
??14	??15/8
		??13	??14/8
??12	??13/8
		??11	??12/8
??10	??11/8
		??9	??10/8
??8	??9/8
		??7	??8/8
??6	??7/8
		??5	??6/8
??4	??5/8
		??3	??4/8
??2	??3/8
		??1	??2/8
??0	??1/8

Because the value of the power gain factors γ that stipulates in the existing standard is a decimal, thereby caused comparatively difficulty of its Digital Implementation in the particular hardware design.

Summary of the invention

The invention provides the power gain factors method of adjustment of code channel in a kind of TD-SCDMA system, carry out the standard multi bit quantization respectively by power gain factors, in making it to be applied to very easily concrete hardware designs and realizing with data division in the code channel and training sequence code part.

Technical solution of the present invention is as follows:

The power gain factors method of adjustment of code channel in a kind of TD-SCDMA system comprises step:

The transmission code channel number of A, the up transmission subsystem of judgement;

B, determine the power gain factors of data division in each code channel, and this power gain factors is carried out the standard multi bit quantization;

C, determine the part of training sequence code in each code channel power gain factors, and this power gain factors carries out the standard multi bit quantization.

Further, if the transmission code channel number of up transmission subsystem is one, then the power gain factors of the data division of this code channel is 1;

If the transmission code channel number of up transmission subsystem is two, then the power gain factors DataScale of the data division of first code channel ₁For

The power gain factors DataScale of the data division of second code channel ₂For

SF wherein ₁Be the spreading factor of first code channel, SF ₂It is the spreading factor of second code channel.

Further, among the described step B, the power gain factors by data division in the code channel just multiply by 2 ¹⁴Obtain the power gain factors quantized value of the data division of 14 bits.

Further, if the transmission code channel number of up transmission subsystem is one, then the power gain factors of the training sequence code of this code channel part is identical with the power gain factors of the data division of this code channel;

If the transmission code channel number of up transmission subsystem is two and adopts different training sequence code skews, then the power gain factors of the training sequence code of first code channel part is identical with the power gain factors of the data division of this code channel, and the power gain factors of the training sequence code part of second code channel is identical with the power gain factors of the data division of this code channel;

If the transmission code channel number of up transmission subsystem is two and adopts identical training sequence code skew that then the power gain factors of the training sequence code of two code channels part equates that its value is

Further, among the described step C, the power gain factors by training sequence code part in the code channel just multiply by 2 ¹⁴Obtain the power gain factors quantized value of the training sequence code part of 14 bits.

The power gain factors adjusting device of code channel comprises judge module, the first power gain factors determination module, first quantization modules, the second power gain factors determination module and second quantization modules in a kind of TD-SCDMA system, wherein,

Judge module is used to judge the transmission code channel number of up transmission subsystem;

The first power gain factors determination module is used for determining the power gain factors of each code channel data division;

First quantization modules is used for the power gain factors of code channel data division is carried out the standard multi bit quantization;

The second power gain factors determination module, be used for determining each code channel training sequence code part power gain factors;

Second quantization modules is used for the power gain factors of code channel training sequence code part is carried out the standard multi bit quantization.

Technical scheme of the present invention provides the channel power collocation method of a code channel and two code channels in a kind of up transmission subsystem, carry out the standard multi bit quantization respectively by power gain factors with DATA part in the code channel and Midamble sign indicating number part, solved the value of power gain factors in the existing standard and be the comparatively problem of difficulty of the Digital Implementation in the particular hardware design that decimal caused, in making it to be applied to very easily concrete hardware designs and realizing.

Description of drawings

The schematic diagram that Fig. 1 merges for different code channels in the up transmission subsystem of the TD-SCDMA system that stipulates in the existing standard;

Fig. 2 is the flow chart of the power gain factors method of adjustment of code channel in the TD-SCDMA of the present invention system;

Fig. 3 is the structured flowchart of the power gain factors adjusting device of code channel in the TD-SCDMA of the present invention system.

Embodiment

1 of up transmission burst sequences comprises two part: DATA (data) part and Midamble (training sequence) sign indicating number part in the TD-SCDMA system, and the realization of this two-part power configuration has certain difference.Major technique design of the present invention is to carry out the standard multi bit quantization respectively by the power gain factors with DATA part in the code channel and Midamble sign indicating number part, in making it to be applied to very easily concrete hardware designs and realizing, thereby the value that has solved power gain factors is the comparatively difficult problem of its Digital Implementation in the particular hardware design that decimal caused.

Below in conjunction with each accompanying drawing specific implementation process of the present invention is further described in detail.

See also Fig. 2, this figure is the flow chart of the power gain factors method of adjustment of code channel in the TD-SCDMA of the present invention system, and its main implementation procedure is as follows:

The transmission code channel number of step 10, the up transmission subsystem of judgement;

Step 11, determine the power gain factors of the part of DATA in each code channel;

Suppose that two used spreading factors of code channel are respectively SF ₁And SF ₂, the power gain weighted factor λ value of their correspondences is respectively so: ${\mathrm{\λ}}_1=\frac{1}{\sqrt{{\mathrm{SF}}_1}},$ ${\mathrm{\λ}}_2=\frac{1}{\sqrt{{\mathrm{SF}}_2}}.$

Make the power gain factors of DATA part in each code channel satisfy following constraint:

$\frac{{\mathrm{DataScale}}_1}{{\mathrm{DataScale}}_2}=\frac{{\mathrm{\λ}}_1}{{\mathrm{\λ}}_2},$ DataScale ₁+ DataScale ₂=1, DataScale wherein ₁Be the power gain factors of DATA part in first code channel, DataScale ₂It is the power gain factors of DATA part in second code channel.

Can obtain by calculating:

If the transmission code channel number of up transmission subsystem is one, then DataScale ₁=1, DataScale ₂=0; If the transmission code channel number of up transmission subsystem is two, then ${\mathrm{DataScale}}_1=\frac{{\mathrm{\λ}}_1}{{\mathrm{\λ}}_1+{\mathrm{\λ}}_2}=\frac{\sqrt{{\mathrm{SF}}_2}}{\sqrt{{\mathrm{SF}}_1}+\sqrt{{\mathrm{SF}}_2}},$ ${\mathrm{DataScale}}_2=\frac{{\mathrm{\λ}}_2}{{\mathrm{\λ}}_1+{\mathrm{\λ}}_2}=\frac{\sqrt{{\mathrm{SF}}_1}}{\sqrt{{\mathrm{SF}}_1}+\sqrt{{\mathrm{SF}}_2}}.$

Step 12, the power gain factors of DATA part in each code channel is carried out the standard multi bit quantization;

According to DataScale ₁And DataScale ₂The value that may get, the power gain factors by DATA part in the code channel just multiply by 2 ¹⁴Obtain the power gain factors quantized value of the DATA part of 14 bits, quantized value is as shown in the table:

Step 13, determine the power gain factors of the part of Midamble sign indicating number in each code channel;

In order to make not stage of development sudden change of transmitted power in same transmission burst sequences, the power gain factors of Midamble sign indicating number part is equal to the power gain factors of DATA part under the situation of a code channel of up transmission employing, is 1.

Two kinds of situations below the calculating of the power gain factors of each code channel Midamble sign indicating number part need divide under the situation of two code channels:

First kind of situation is: if two code channels adopt different Midamble sign indicating number skews, this moment, the power stack and the DATA power stacked system partly of Midamble sign indicating number part were the same, as long as guarantee that therefore the Midamble sign indicating number part on each code channel is consistent with the baseband gain of DATA part, promptly can directly DATA power gain factors partly also be applied on the corresponding M idamble sign indicating number part, that is:

${\mathrm{MidambleScale}}_1={\mathrm{DataScale}}_1=\frac{\sqrt{{\mathrm{SF}}_2}}{\sqrt{{\mathrm{SF}}_1}+\sqrt{{\mathrm{SF}}_2}},$

${\mathrm{MidambleScale}}_2={\mathrm{DataScale}}_2=\frac{\sqrt{{\mathrm{SF}}_1}}{\sqrt{{\mathrm{SF}}_1}+\sqrt{{\mathrm{SF}}_2}};$

Second kind of situation is: if two code channels adopt identical Midamble sign indicating numbers skew, and the base band power of Midamble sign indicating number part and equal (MidambleScale on this moment two code channels ₁+ MidambleScale ₂) ², in order to make itself and DATA base band gross power and (DataScale partly ₁ ²+ DataScale ₂ ²) unanimity, Midamble sign indicating number power gain factors partly should be set as follows:

${\mathrm{MidambleScale}}_1={\mathrm{MidambleScale}}_2=\frac{\sqrt{{{\mathrm{DataScale}}_1}^2+{{\mathrm{DataScale}}_2}^2}}{2}\text{.}$

Step 14, the power gain factors of Midamble sign indicating number part in each code channel is carried out the standard multi bit quantization;

According to MidambleScale ₁And MidambleScale ₂The value that may get, the power gain factors by Midamble sign indicating number part in the code channel just multiply by 2 ¹⁴Obtain the power gain factors quantized value of the Midamble sign indicating number part of 14 bits, concrete quantized value is as shown in the table:

Corresponding to said method of the present invention, the present invention and then the power gain factors adjusting device of code channel in a kind of TD-SCDMA system is provided, see also Fig. 3, this figure is the structured flowchart of the power gain factors adjusting device of code channel in the TD-SCDMA of the present invention system, it mainly comprises judge module, the first power gain factors determination module, first quantization modules, the second power gain factors determination module and second quantization modules, wherein

Judge module is used to judge the transmission code channel number of up transmission subsystem.

The first power gain factors determination module is used for determining each code channel DATA power gain factors partly, if the transmission code channel number of up transmission subsystem is one, then the power gain factors of the DATA of this code channel part is 1; Transmission code channel number as if up transmission subsystem is two, then the power gain factors DataScale of the DATA of first code channel part ₁For

The power gain factors DataScale of the DATA part of second code channel ₂For

SF wherein ₁Be the spreading factor of first code channel, SF ₂It is the spreading factor of second code channel.

First quantization modules is used for the power gain factors of code channel DATA part be multiply by 2 ¹⁴Obtain the power gain factors quantized value of the DATA part of 14 bits.

The second power gain factors determination module, be used for determining each code channel Midamble sign indicating number part power gain factors, if the transmission code channel number of up transmission subsystem is one, then the power gain factors of the Midamble sign indicating number of this code channel part is identical with the power gain factors of the DATA part of this code channel; If the transmission code channel number of up transmission subsystem is two and adopts different Midamble sign indicating number skews, then the power gain factors of the Midamble sign indicating number of first code channel part is identical with the power gain factors of the DATA part of this code channel, and the power gain factors of the Midamble sign indicating number part of second code channel is identical with the power gain factors of the DATA part of this code channel; If the transmission code channel number of up transmission subsystem is two and adopts identical Midamble sign indicating number skew that then the power gain factors of the Midamble sign indicating number of two code channels part equates that its value is

Second quantization modules is used for the power gain factors of code channel Midamble sign indicating number part be multiply by 2 ¹⁴Obtain the power gain factors quantized value of the Midamble sign indicating number part of 14 bits.

The description of corresponding contents no longer gives too much to give unnecessary details here in other specific implementation detail with reference said method of the present invention of device of the present invention.

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 (6)

1, the power gain factors method of adjustment of code channel in a kind of TD-SCDMA system is characterized in that, comprises step:

The transmission code channel number of A, the up transmission subsystem of judgement;

B, determine the power gain factors of data division in each code channel, and this power gain factors is carried out the standard multi bit quantization;

C, determine the part of training sequence code in each code channel power gain factors, and this power gain factors carries out the standard multi bit quantization.

2, the method for claim 1 is characterized in that, if the transmission code channel number of up transmission subsystem is one, then the power gain factors of the data division of this code channel is 1;

If the transmission code channel number of up transmission subsystem is two, then the power gain factors DataScale of the data division of first code channel ₁For

The power gain factors DataScale of the data division of second code channel ₂For

SF wherein ₁Be the spreading factor of first code channel, SF ₂It is the spreading factor of second code channel.

3, method as claimed in claim 1 or 2 is characterized in that, among the described step B, the power gain factors by data division in the code channel just multiply by 2 ¹⁴Obtain the power gain factors quantized value of the data division of 14 bits.

4, method as claimed in claim 2 is characterized in that, if the transmission code channel number of up transmission subsystem is one, then the power gain factors of the training sequence code of this code channel part is identical with the power gain factors of the data division of this code channel;

If the transmission code channel number of up transmission subsystem is two and adopts different training sequence code skews, then the power gain factors of the training sequence code of first code channel part is identical with the power gain factors of the data division of this code channel, and the power gain factors of the training sequence code part of second code channel is identical with the power gain factors of the data division of this code channel;

If the transmission code channel number of up transmission subsystem is two and adopts identical training sequence code skew that then the power gain factors of the training sequence code of two code channels part equates that its value is $\frac{\sqrt{{{\mathrm{DataScale}}_1}^2+{{\mathrm{DataScale}}_2}^2}}{2}.$

As claim 1 or 4 described methods, it is characterized in that 5, among the described step C, the power gain factors by training sequence code part in the code channel just multiply by 2 ¹⁴Obtain the power gain factors quantized value of the training sequence code part of 14 bits.

6, the power gain factors adjusting device of code channel in a kind of TD-SCDMA system is characterized in that, comprises judge module, the first power gain factors determination module, first quantization modules, the second power gain factors determination module and second quantization modules, wherein,

Judge module is used to judge the transmission code channel number of up transmission subsystem;

The first power gain factors determination module is used for determining the power gain factors of each code channel data division;

First quantization modules is used for the power gain factors of code channel data division is carried out the standard multi bit quantization;

The second power gain factors determination module, be used for determining each code channel training sequence code part power gain factors;

Second quantization modules is used for the power gain factors of code channel training sequence code part is carried out the standard multi bit quantization.

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