CN101510791A - Transmitting device, modulation method and modulation device for time division radio communication system - Google Patents

Abstract

The invention provides an emitting device, a modulation method and a modulation device in a time-division wireless communication system. The modulation device comprises a recording module used for recording corresponding relationship between data bits in a first data flow and a required modulation mode, a data modulation module used for determining the modulation mode required by current data bits needing processing in the first data flow and carrying out data modulation to continuous data bits including current bits to obtain a second data flow, a weighting module used for multiplying weight for every symbol in the second data flow to obtain a third data flow, and a spread spectrum scrambling module used for carrying out spread spectrum scrambling to the third data flow by using spread spectrum code and scrambler and outputting a fourth data flow after being obtained. The emitting device, the modulation method and the modulation device can carry out effective modulation processing under the condition that data blocks of different modulation types are mixed and transmitted in a physical channel.

Description

Emitter in the time-diviional radiocommunication system, modulator approach and modulating device

Technical field

The present invention relates to the modulation technique of time-diviional radiocommunication system, emitter, modulator approach and modulating device in particularly a kind of time-diviional radiocommunication system.

Background technology

Along with developing rapidly of wireless communication system cause and network, simple speech business can not have been satisfied the requirement of people to high-speed data service, provide as video, web page browsing, multi-medium data and download the free-revving engine that business such as upload has become wireless communication system and service, and these business have proposed higher demand to wireless communication system, require system that higher transmission rate and littler propagation delay time are provided.

The third generation based on code division multiple access (CDMA) moves spread spectrum communication system (3G), utilize existing Radio Resource, as Radio Resources such as code channel, time slot, frequencies, the technology of multiple raising transmission rate has been proposed, as on down direction, the 3GPP of International Standards Organization has proposed the down high-speed data grouping and has inserted (HSDPA) technology and carried out standardization, makes the 3G system to the support of downlink business very big enhancing arranged.3GPP adopts these technology that the upstream packet business is optimized again subsequently, has proposed up-high speed packet access technology (HSUPA) at up direction, significantly improves the hardware circuit solution and the overall throughput of ascending packet data, reduces transmission delay simultaneously.

In these high-speed access technologies, all adopted Adaptive Modulation and Coding (AMC) technology, it adopts low-order-modulated mode (as QPSK) under the situation of bad channel quality, and adopts high order modulation (as 8PSK, 16QAM and 64QAM etc.) to improve power system capacity under the good situation of channel quality.

With Adaptive Modulation and Coding (AMC) technology in 3G TD SDMA (TD-SCDMA) the system high-speed ascending High Speed Packet Access is example, in order to support the HSUPA characteristic, 3G time-division system up direction has increased enhancing dedicated channel (E-DCH), E-DCH is a transmission channel, be used to carry the high speed uplink data, use high order modulation when channel quality is good.The resource (comprising power, time slot, code channel etc.) that E-DCH uses can be distributed by Node B (Node B) scheduling.Simultaneously, also defined two control channels at up direction, that is: up-enhancing control channel (E-UCCH) and enhanced uplink random access channel (E-RUCCH) are used to transmit the relevant signaling information of up enhancing.

E-UCCH is in the same place with E-DCH is multiplexing usually, transmits the relevant information of current E-DCH HARQ (mix automatically and retransmit).The modulation system of E-UCCH is fixed as QPSK.And E-RUCCH is mapped on the physical accidental access-in resource, is mainly used in the up professional access request that strengthens, and its modulation system also is QPSK.

In the prior art, all data blocks on the same physical channel are carried out Adaptive Modulation and Coding, select low order or high-order modulating, yet, for above-mentioned new application, be same physical channel when having the data block mixed transport of different modulating type, above-mentioned method obviously can't be suitable for.

Summary of the invention

The purpose of this invention is to provide emitter, modulator approach and modulating device in a kind of time-diviional radiocommunication system, exist at same physical channel under the situation of data block mixed transport of different modulating type and carry out effective modulation treatment.

To achieve these goals, the embodiment of the invention provides the emitter in a kind of time-diviional radiocommunication system, comprise a modulating device, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

The data-modulated module, be used for according to described corresponding relation, need in described first data flow to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain second data flow;

Weighting block is used for each symbol of second data flow is multiplied by weight, obtains the 3rd data flow;

The spectrum-spreading and scrambling module is used to use spreading code and scrambler that the 3rd data flow is carried out spectrum-spreading and scrambling, obtains exporting after the 4th data flow.

Above-mentioned emitter, wherein:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

Above-mentioned emitter, wherein: also comprise:

The first fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, the data in the 4th data flow is carried out full scale quantize.

To achieve these goals, the embodiment of the invention also provides the emitter in a kind of time-diviional radiocommunication system, comprise a modulating device, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

First is provided with module, is used to set in advance following 3 one-to-one relationship:

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

Element in the product set and the one-to-one relationship between the coding in the code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

The data bit acquisition module, be used for corresponding relation according to the modulation system of data bit and the needs use of first data flow of record, modulation system that need in described first data flow to determine the current data bit handled to use, and obtain the current continuous data bit that comprises the current data bit according to the modulation system of determining;

First coding is selected module, is used for selecting first present encoding corresponding with current continuous data bit according to the one-to-one relationship between continuous data bit and the coding from described code set;

Computing module is used to calculate spreading code, the weight of current use, scrambler three's current product;

Second coding is selected module, be used for determining the corresponding currentElement of current first coding of described product set and current sum of products, and, from described code set, select second present encoding corresponding with currentElement according to the one-to-one relationship between element and the coding;

The complex value determination module, the one-to-one relationship between the complex value that is used for obtaining after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after described second present encoding being decoded as the complex value of correspondence.

Above-mentioned emitter, wherein:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

Above-mentioned emitter wherein, also comprises:

The second fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, described complex value is carried out full scale quantize.

To achieve these goals, the embodiment of the invention also provides the modulating device in a kind of time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

The data-modulated module, be used for according to described corresponding relation, need in described first data flow to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain second data flow;

Weighting block is used for each symbol of second data flow is multiplied by weight, obtains the 3rd data flow;

The spectrum-spreading and scrambling module is used to use spreading code and scrambler that the 3rd data flow is carried out spectrum-spreading and scrambling, obtains exporting after the 4th data flow.

Above-mentioned modulating device, wherein:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

Above-mentioned modulating device wherein, also comprises:

The first fixed point quantization modules according to the maximum in the absolute value of the absolute value of all real parts of the modulation system that current time slots adopted and all imaginary parts, is carried out full scale to the data in the 4th data flow and is quantized.

To achieve these goals, the embodiment of the invention also provides the modulating device in a kind of time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

First is provided with module, is used to set in advance following 3 one-to-one relationship:

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

Element in the product set and the one-to-one relationship between the coding in the code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

The data bit acquisition module, be used for corresponding relation according to the modulation system of data bit and the needs use of first data flow of record, modulation system that need in described first data flow to determine the current data bit handled to use, and obtain the current continuous data bit that comprises the current data bit according to the modulation system of determining;

First coding is selected module, is used for selecting first present encoding corresponding with current continuous data bit according to the one-to-one relationship between continuous data bit and the coding from described code set;

Computing module is used to calculate spreading code, the weight of current use, scrambler three's current product;

Second coding is selected module, be used for determining the corresponding currentElement of current first coding of described product set and current sum of products, and, from described code set, select second present encoding corresponding with currentElement according to the one-to-one relationship between element and the coding;

The complex value determination module, the one-to-one relationship between the complex value that is used for obtaining after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after second present encoding being decoded as the complex value of correspondence.

Above-mentioned modulating device, wherein:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

Above-mentioned modulating device, wherein: also comprise:

The second fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, described complex value is carried out full scale quantize.

To achieve these goals, the embodiment of the invention also provides the modulator approach in a kind of time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, described method comprises:

The corresponding relation of the modulation system that writes down the data bit in described first data flow and need to use;

According to described corresponding relation, need in described first data flow to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain second data flow;

Each symbol in second data flow is multiplied by weight, obtains the 3rd data flow;

Use spreading code and scrambler that the 3rd data flow is carried out spectrum-spreading and scrambling, obtain exporting after the 4th data flow.

Above-mentioned method, wherein:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

Above-mentioned method, wherein: also comprise:

According to the maximum in the absolute value of the absolute value of all real parts of the modulation system that current time slots adopted and all imaginary parts, the data in the 4th data flow are carried out full scale quantize.

To achieve these goals, the embodiment of the invention also provides the modulator approach in a kind of time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, described method comprises:

The corresponding relation of the modulation system that writes down the data bit in described first data flow and need to use;

Set in advance following 3 one-to-one relationship:

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

Element in the product set and the one-to-one relationship between the coding in the code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

Corresponding relation according to the modulation system of data bit and needs in first data flow of record use, modulation system that need in described first data flow to determine the current data bit handled to use, and obtain the current continuous data bit that comprises the current data bit according to the modulation system of determining;

According to the one-to-one relationship between continuous data bit and the coding, from described code set, select first present encoding corresponding with current continuous data bit;

Calculate spreading code, the weight of current use, scrambler three's current product;

Determine in the described product set and the corresponding currentElement of current first coding of current sum of products, and according to element with encode between one-to-one relationship, selection second present encoding corresponding from described code set with currentElement;

One-to-one relationship between the complex value that obtains after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after described second present encoding being decoded as the complex value of correspondence.

Above-mentioned method, wherein:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

Above-mentioned method, wherein: also comprise:

According to the maximum in the absolute value of the absolute value of all real parts of the modulation system that current time slots adopted and all imaginary parts, described complex value is carried out full scale quantize.

The embodiment of the invention has following beneficial effect:

In the embodiment of the invention, when first data flow on same physical channel need utilize at least two kinds of modulation systems to modulate, set in advance the corresponding relation between data bit and the modulation system, when modulation treatment, determine the modulation system that current continuous data bit need use according to this corresponding relation, and then carry out data-modulated according to the modulation system of determining, and make and adopt different modulation systems to become possibility at same physical channel, can satisfy existing business demand;

In the embodiment of the invention, consider for the data after the data-modulated, when carrying out weighting, spread spectrum, scrambling, the scope of the scope of the value of the data that obtain and the value of the data after the data-modulated is identical, so to the mapping of encoding of the data after the data modulation, the coding mapping is also carried out in weighting, spread spectrum, scrambling,, greatly reduced the operand of weighting, spread spectrum, scrambling so in weighting, spread spectrum, scrambling process, need not carry out floating-point operation;

In the embodiment of the invention, first data flow on the same physical channel need utilize at least two kinds of modulation systems to modulate, when quantizing, in same time slot, the complex-valued data that the different modulating mode obtains carries out full scale according to the maximum in the absolute value of the absolute value of the real part of all modulation systems and imaginary part and quantizes, and has improved the computational accuracy of filter and the precision of transmitting power.

Description of drawings

Fig. 1 is to the handling process schematic diagram of each data flow in the modulator approach in the time-diviional radiocommunication system of the embodiment of the invention;

Fig. 2 is the structural representation of the burst in the TD-SCDMA system;

Fig. 3 is the structural representation of the modulating device in the time-diviional radiocommunication system of the embodiment of the invention;

Fig. 4 is the schematic diagram of a kind of data flow storage mode of the embodiment of the invention;

Fig. 5 is to the another kind of handling process schematic diagram of each data flow in the modulator approach in the time-diviional radiocommunication system of the embodiment of the invention;

Fig. 6 is the another kind of structural representation of the modulating device in the time-diviional radiocommunication system of the embodiment of the invention.

Embodiment

In the explanation of the embodiment of the invention, only be that example is elaborated, but should be understood that the method in the embodiment of the invention, device are equally applicable to other time-diviional radiocommunication system with TD-SCDMA.

Modulator approach in the time-diviional radiocommunication system of the embodiment of the invention comprises the step that the data flow that is mapped on the physical channel is modulated, and wherein, as shown in Figure 1, first data flow on each physical channel is carried out following steps respectively:

Step 11 receives the first data flow A1, and the described first data flow A1 need utilize at least two kinds of modulation systems to modulate;

Step 12 according to upper layer information, writes down the corresponding relation of data bit and the modulation system of need using among the described first data flow A1;

Step 13, corresponding relation according to the modulation system of data bit and needs among the first data flow A1 of record use, modulation system that need among the described first data flow A1 to determine the current data bit handled to use, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain the second data flow A2, just M continuous data bit is mapped as a complex symbol among the first data flow A1 with each physical channel, and wherein this M is relevant with modulation system;

Step 14 is multiplied by weight with each symbol among the second data flow A2, obtains the 3rd data flow A3;

Step 15 uses spreading code (being the Orthogonal Variable Spreading Factor OVSF ovsf code in TD-SCDMA) and sub-district specific scramble codes that the 3rd data flow A3 is carried out spectrum-spreading and scrambling, obtains exporting behind the 4th data flow A4.

Wherein spread spectrum is the different user that is used for distinguishing same time slot, and spread spectrum coefficient is between 1-16, and scrambler is a complex-valued sequences v, this sequence vIn element from 1, j ,-1, value among the-j.

Wherein, for instance, M=2,3 and 4 o'clock modulation systems be respectively QPSK, 8PSK and 16QAM, more M does not enumerate at this one by one with the corresponding relation of modulation system, table 1 and table 2 are respectively the mapping relations form that QPSK and 16QAM modulate.

Table 1

Table 2

After above-mentioned operation, the 4th data flow A4 that exports on each physical channel is inserted the training sequence of modulating, through the overpower adjustment, a plurality of combining channels finally form a burst then, and wherein combining channel is meant that the chip on the corresponding time point of each channel carries out addition.The structure of this burst as shown in Figure 2, the protection of the data of each 352 chip of the training sequence (Midamble sign indicating number) of they 144 chips in the middle of comprising and the right and left and 16 chips at last time slot end of inserting is at interval.

The modulation system how embodiment of the invention is write down the data correspondence among the first data flow A1 is elaborated below.

In an embodiment of the present invention, realize the corresponding relation of data and modulation system in following mode.

In the explanation of following implementation, all the situation with following supposition describes.

Suppose that the first data flow A1 need utilize 3 kinds of modulation systems to modulate, 3 kinds of modulation systems are respectively: first modulation system, second modulation system and the 3rd modulation system, wherein, the 1st to X bit adopts first modulation system, X+1 adopts second modulation system to X+Y bit, and X+Y+1 adopts the 3rd modulation system to X+Y+Z bit.

＜mode one 〉

Write down the modulation system that each bit among the first data flow A1 need use, then keep the corresponded manner shown in the table 3 in the step 12 and get final product.

Table 3

In the step 13,, the data among the first data flow A1 are modulated according to the modulation system of correspondence get final product according to this corresponding relation.

＜mode two 〉

In mode two, writing down needs to use the data segment of identical modulation system and the corresponding relation of the modulation system that this data segment need use, i.e. corresponded manner shown in the table 4 among the first data flow A1:

Table 4

Data segment among the first data flow A1	The modulation system that needs use
		The 1st bit is to X bit	First modulation system

X+1 bit is to X+Y bit	Second modulation system
		X+Y+1 bit is to X+Y+Z bit	The 3rd modulation system
......	......

In the step 13,, the data among the first data flow A1 are modulated according to the modulation system of correspondence get final product according to this corresponding relation.

＜mode three 〉

In mode three, record needs to use the data segment of identical modulation system and the corresponding relation of the modulation system that this data segment need use, this data segment uses initial bits sequence number and data segment, length to represent, then, keeps the corresponded manner shown in the table 5 in the step 12 and gets final product.

Table 5

The sequence number of first bit of data segment	Data segment, length	Modulation system
			1	X	First modulation system
X+1	Y	Second modulation system
			X+Y+1	Z	The 3rd modulation system
......	......	.......

＜mode four 〉

Generally speaking, even there are the data of compound modulation, but all be very long one section modulation system that continuous The data is identical generally, so in mode three, by the modulation system of the data correspondence among the table 6 record first data flow A1.

Table 6

The sequence number of first bit of modulation system conversion back effect	Modulation system after the conversion
		1	First modulation system
X+1	Second modulation system
		X+Y+1	The 3rd modulation system
......	......

Certainly, also can be to adopt following table 7 record:

Table 7

The sequence number of last bit of the modulation system effect before the conversion	Modulation system after the conversion
		X	First modulation system
X+Y	Second modulation system
		X+Y+Z	The 3rd modulation system
......	......

＜mode five 〉

All be to utilize independent data structure to preserve corresponding relation in the above-mentioned mode, but should be appreciated that, can also identify by insertion modulation system in the first data flow A1 and handle, be described as follows.

Before each bit, insert the modulation system sign, show the modulation system that bit subsequently should adopt; Or

Before some bits, insert the modulation system sign, show that bit subsequently adopts this modulation system to identify the modulation system of representative, identifies until handling next modulation system.

Under this mode,, only need to increase a sign that is used to identify the modulation system of this increase and get final product if modulation system increases.

By above-mentioned description, when data-modulated,, data are carried out corresponding modulation get final product according to the modulation system of the data in the data flow of record, so can modulate, satisfy business demand to the data that modulation system is different on the same channel.

Emitter in the time-diviional radiocommunication system of the embodiment of the invention comprises a modulating device, as shown in Figure 3, this modulating device is used for the first data flow A1 on each physical channel is carried out modulation treatment, have the modulation system difference of two parts data flow among the described first data flow A1 at least, comprising:

Logging modle is used for according to upper layer information, writes down the corresponding relation of data bit and the modulation system of need using among the described first data flow A1;

The data-modulated module, be used for corresponding relation according to the modulation system of data bit and the needs use of the first data flow A1 of record, need among the described first data flow A1 to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining to get the continuous data bit that comprises current bit and carry out data-modulated, obtain the second data flow A2, just M continuous data bit is mapped as a complex symbol among the first data flow A1 with each physical channel, and wherein this M is relevant with modulation system;

Weighting block is used for each symbol of the second data flow A2 is multiplied by weight, obtains the 3rd data flow A3;

The spectrum-spreading and scrambling module is used for using the specific scrambler of spreading code (being the Orthogonal Variable Spreading Factor OVSF ovsf code at TD-SCDMA) and sub-district that the 3rd data flow A3 is carried out spectrum-spreading and scrambling, obtains exporting behind the 4th data flow A4.

Wherein spread spectrum is the different user that is used for distinguishing same time slot, and spread spectrum coefficient is between 1-16, and scrambler is a complex-valued sequences v, this sequence vIn element from 1, j ,-1, value among the-j.

And how to write down data among the first data flow A1 and the corresponding relation of modulation system has had been described in detail in front, no longer be repeated in this description at this.

Simultaneously, consider in same channel, to have the data that need use different modulating mode to modulate, therefore, in the embodiment of the invention, store for the following mode of The data among the first data flow A1.

＜data flow storage mode one 〉

The data flow of each channel takies the separate space piece, and the data bit of different modulating type sends the sequencing storage according to reality in each data flow, and this mode makes storage become convenient, and reading is simple.

Fig. 4 is the situation of the hardware memory of certain 32 bit width when adopting two kinds of modulation type data of mode one certain physical channel of storage, and wherein this physical channel exists QPSK and two kinds of digital modulation modes of 16QAM.

＜data flow storage mode two 〉

In the storage mode one, may need to stride the address bit that fetches data and modulate, in order to address this problem, in mode two, the data flow of each channel takies the separate space piece, and the data bit of different modulating type press the modulation type piecemeal and stored in each data flow.This mode makes storage become convenient, also need not stride the address bit that fetches data and modulate.

＜data flow storage mode three 〉

In the storage mode three, the data flow of each channel is mixed storage according to the actual transmission order, and this mode makes that reading of data is very simple.

In the step 15, for TD-SCDMA, at first use ovsf code to carry out the spread spectrum operation, a symbol is expanded into N chip, then, each chip multiply by a code element through the multiple pseudorandom scrambler sequence of rotation successively.

As follows, suppose that a data symbol is as follows among the second data flow A2:

$d_1^{(k,i)}{d}_2^{(k,i)}\·\·\·d_{Q_{\mathrm{MAX}}/Q_k}^{(k,i)}$

Wherein, k is a Customs Assigned Number, and i is a physical channel numbers, Q _kBe spreading factor (code length of spreading code), Q _MAXBe spreading factor maximum in the system.

When carrying out the weighting operation, be multiplied by weight

Then the data symbol after the weighting is used channel code c ^kCarry out spread spectrum, obtain:

$w_Q^k\·d_1^{(k,i)}\·(c_1^{(i,k)},...,c_{Q_k}^{(i,k)}),w_Q^k\·d_2^{(k,i)}\·(c_1^{(i,k)},...,c_{Q_k}^{(i,k)}),...,$

$w_Q^k\·d_{Q_{\mathrm{MAX}}/Q_k}^{(k,i)}\·(c_1^{(i,k)},...,c_{Q_k}^{(i,k)})$

At last, use scrambler v position to take advantage of, obtain the data after weighting, spread spectrum and the scrambling, that is:

$w_Q^k\&CenterDot;d_1^{(k,i)}\&CenterDot;({\mathrm{<figure-callout\; id="1"\; label="v"\; filenames="A200910080784E00322.png"\; state="\{\{state\}\}">v</figure-callout>}}_1\&CenterDot;c_1^{(i,k)},...,{v_{Q_k}\&CenterDot;c}_{Q_k}^{(i,k)}),w_Q^k\&CenterDot;d_2^{(k,i)}\&CenterDot;(v_{Q_k+1}{c}_1^{(i,k)},...,{v_{Q_{2k}}c}_{Q_k}^{(i,k)}),...,$

$w_Q^k\&CenterDot;d_{Q_{\mathrm{MAX}}/Q_k}^{(k,i)}\&CenterDot;({v_{Q_{\max }-{\mathrm{<figure-callout\; id="1"\; label="Q\; k\; +"\; filenames="A200910080784E00322.png"\; state="\{\{state\}\}">Q</figure-callout>}}_k+1}\&CenterDot;c}_1^{(i,k)},...,v_{Q_{\max }}\&CenterDot;c_{Q_k}^{(i,k)})$

Can see that from above-mentioned description the data after the data-modulated have been complex symbols, and weighting, spread spectrum, scrambling also all are the complex multiplication operations, in fixed point realizes, in the traditional processing method, directly plural number are operated, greatly wasted resource.

With the 3G time-division system is example, 16QAM modulation mapping and QPSK modulation are illustrated in the above, by table 1 above-mentioned and table 2 as can be seen, the possible plural number that final digital modulation has been shone upon has 20 kinds of situations, it can represent 20 kinds of situations that digital modulation is intact with 5 bit Unified coding, suppose that 5 intact bit numbers of digital modulation are DM, so digital hybrid modulation sees Table 8 with the process of giving an example of Unified coding mapping.

Table 8

Simultaneously, the process of weighting, spread spectrum and scrambling is the process that the finite value after the digital modulation is gathered and limited spreading code plural number set is multiplied each other, and its result also is a finite value, can use again the method that coding shines upon to realize according to the process of this characteristics spread spectrum.

The process of spread spectrum is exactly that the intact data of digital modulation multiply by spreading code, weight, scrambler, and the value of TD-SCDMA spreading code be set+1 ,-1}, the set of the value of weight and scrambler all be+1 ,-1 ,+j,-j} is so the set of the value of spreading code, weight, scrambler three's product also is {+1 ,-1, + j ,-j}, it can be represented with 2bit, describe for convenient, spreading code, weight, scrambler three's product is designated as SC, and wherein, the coding of SC is as shown in table 9.

Table 9

SC	The plural number of representative
		00	+1
01	-1
		10	+j
11	-j

Because the process of weighting, spread spectrum and scrambling is exactly the process that DM and SC multiply each other, and since the set of the value of SC be+1 ,-1 ,+j ,-j} is so the intact data acquisition system of weighting spectrum-spreading and scrambling still is 20 kinds of situations shown in the table 8.

According to above-mentioned description, to the process of above-mentioned weighting, spread spectrum and scrambling,, can greatly save system's calculation resources if use coded system to handle, be elaborated below.

According to the coded system of table 8 and table 9 definition, suppose that the data after the weighting spectrum-spreading and scrambling is finished represent that with Q then the corresponding relation between SC, DM and the Q is as shown in table 10.

Table 10

Can find by above-mentioned form, utilize the coding method of the embodiment of the invention, need not in weighting, spread spectrum and scrambling process, carry out Floating-point Computation, export and get final product and only need to obtain corresponding plural number according to last coding, saved computational resource greatly, and spreading code, weight, scrambler three's product can calculate in advance.

Therefore, the modulator approach in the time-diviional radiocommunication system of the embodiment of the invention comprises the step that the data flow that is mapped on the physical channel is modulated, and wherein, as shown in Figure 5, the first data flow A1 on each physical channel is carried out following steps respectively:

Step 51 receives the first data flow A1, and the described first data flow A1 need utilize at least two kinds of modulation systems to modulate;

Step 52 according to upper layer information, writes down the corresponding relation of data bit and the modulation system of need using among the described first data flow A1;

Step 53 sets in advance following 3 one-to-one relationship (corresponding relation shown in the table 8 just):

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Step 54 sets in advance the second following corresponding relation:

One-to-one relationship (table 10) between the coding in element in the product set and this code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

Step 55, corresponding relation according to the modulation system of data bit and needs among the first data flow A1 of record use, modulation system that need among the described first data flow A1 to determine the current data bit handled to use, and obtain current continuous data bit B according to the modulation system of determining;

Step 56 according to the one-to-one relationship between continuous data bit and the coding, is selected the first present encoding B1 corresponding with current continuous data bit B1 from described code set;

Step 57 is calculated spreading code, the weight of current use, scrambler three's current product C;

Step 58 is determined in the described product set and the corresponding currentElement of current first coding of current sum of products, and according to element with encode between one-to-one relationship, the selection second present encoding B2 corresponding from described code set with currentElement;

Step 59 according to the one-to-one relationship between coding and the complex value, is exported after the described second present encoding B2 is decoded as corresponding complex value.

Utilize above-mentioned method, only need in the end to export a complex value, carry out the complex value Floating-point Computation in weighting, spread spectrum, the scrambling process and not be used in, so significantly reduced amount of calculation.

Emitter in the time-diviional radiocommunication system of the embodiment of the invention comprises a modulating device, and modulating device comprises as shown in Figure 6:

Logging modle is used for according to upper layer information, writes down the corresponding relation of data bit and the modulation system of need using among the described first data flow A1;

First is provided with module, is used to set in advance following 3 one-to-one relationship (corresponding relation shown in the table 8 just):

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

One-to-one relationship (table 10) between the coding in element in the product set and this code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

The data bit acquisition module, be used for corresponding relation according to the modulation system of data bit and the needs use of the first data flow A1 of record, modulation system that need among the described first data flow A1 to determine the current data bit handled to use, and obtain current continuous data bit B according to the modulation system of determining;

First coding is selected module, is used for selecting the first present encoding B1 corresponding with current continuous data bit according to the one-to-one relationship between continuous data bit and the coding from described code set;

Computing module is used to calculate spreading code, the weight of current use, scrambler three's current product C;

Second coding is selected module, be used for determining the corresponding currentElement of current first coding of described product set and current sum of products, and, from described code set, select the second present encoding B2 corresponding with currentElement C according to the one-to-one relationship between element and the coding;

The complex value determination module, the one-to-one relationship between the complex value that is used for obtaining after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after the described second present encoding B2 being decoded as the complex value of correspondence.

Because the corresponding relation of the modulation system that how to write down the data bit among the first data flow A1 and need to use has been described in detail in front, therefore, in this no longer repeat specification.

In the above description, first is encoded to 5 bits, but can certainly represent with 6 bits even more bits, only requires that it can shine upon the continuous data bit that modulation systems all in this data flow may exist and get final product.

In the prior art, in case there is hybrid modulation, then all time slots all can adopt identical value to carry out the full scale quantification, that is: the maximum value in the numerical value of pairing real part of the modulation system of all employings and imaginary part is exemplified below.

Suppose that current business needs 16QAM and two kinds of modulation systems of QPSK, then all time slots are all according to 3/ Full scale quantizes.

Suppose that current time slots only adopts the QPSK modulation system, that also is according to 3/ Full scale quantizes, and like this, when sending to the base band formed filter after quantification, precision has just reduced.

In order to address the above problem, in the embodiment of the invention, one fixed point quantization modules is set, when quantification treatment, the data of current time slots, quantize according to the maximum in the numerical value of pairing real part of modulation system that adopts and imaginary part, with the 3G time-division TD-SCDMA 16QAM of system and two kinds of modulation systems of QPSK, each 10 bit of fixed point real part imaginary part are example, when the data of supposing current time slots only needed to adopt the QPSK modulation system, floating data was made as a, then quantizes according to the maximum value in the numerical value of pairing real part of QPSK and imaginary part, just utilize 1 to quantize, then fixed-point number is [a*511], and when only having the 16QAM modulation system, floating data is a, then quantize, just utilize 3/ according to the maximum value in the numerical value of pairing real part of 16QAM and imaginary part Quantize, fixed-point data is [(a*sqrt (5)/3) * 511].

When the data of supposing current time slots need adopt 16QAM and two kinds of modulation systems of QPSK, quantize, just utilize 3/ according to the maximum value in the numerical value of 16QAM and pairing real part of QPSK and imaginary part Quantize.

Utilize the quantization method of prior art, only adopt the fixed-point value of the floating data a in the time slot of QPSK to be [(a*sqrt (5)/3) * 511], and utilize the method and apparatus of the embodiment of the invention, only adopt the fixed-point value of the floating data a in the time slot of QPSK to be [a*511], improved the computational accuracy of filter and the precision of transmitting power.

Certainly, can be in the embodiment of the invention by storing the fixed-point value of data acquisition system after weighting, spread spectrum and the scrambling under each modulation system in advance, last table look-at can obtain.When having QPSK and 16QAM to exist, data acquisition system is after weighting, spread spectrum and the scrambling: $\{1/\sqrt{5},2/\sqrt{5},3/\sqrt{5},1\}.$

The present invention is an example with the TD-SCDMA system only, realizes the field but the method also can be used for the correlation detector of other field of wireless communications systems.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (18)

1. the emitter in the time-diviional radiocommunication system, comprise a modulating device, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, it is characterized in that described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

The data-modulated module, be used for according to described corresponding relation, need in described first data flow to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain second data flow;

Weighting block is used for each symbol of second data flow is multiplied by weight, obtains the 3rd data flow;

The spectrum-spreading and scrambling module is used to use spreading code and scrambler that the 3rd data flow is carried out spectrum-spreading and scrambling, obtains exporting after the 4th data flow.

2. emitter according to claim 1 is characterized in that:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

3. emitter according to claim 1 and 2 is characterized in that, also comprises:

The first fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, the data in the 4th data flow is carried out full scale quantize.

4. the emitter in the time-diviional radiocommunication system, comprise a modulating device, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow, it is characterized in that described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

First is provided with module, is used to set in advance following 3 one-to-one relationship:

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

Element in the product set and the one-to-one relationship between the coding in the code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

The data bit acquisition module, be used for corresponding relation according to the modulation system of data bit and the needs use of first data flow of record, modulation system that need in described first data flow to determine the current data bit handled to use, and obtain the current continuous data bit that comprises the current data bit according to the modulation system of determining;

First coding is selected module, is used for selecting first present encoding corresponding with current continuous data bit according to the one-to-one relationship between continuous data bit and the coding from described code set;

Computing module is used to calculate spreading code, the weight of current use, scrambler three's current product;

Second coding is selected module, be used for determining the corresponding currentElement of current first coding of described product set and current sum of products, and, from described code set, select second present encoding corresponding with currentElement according to the one-to-one relationship between element and the coding;

The complex value determination module, the one-to-one relationship between the complex value that is used for obtaining after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after described second present encoding being decoded as the complex value of correspondence.

5. emitter according to claim 4 is characterized in that:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

6. according to claim 4 or 5 described emitters, it is characterized in that, also comprise:

The second fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, described complex value is carried out full scale quantize.

7. the modulating device in the time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow is characterized in that, described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

The data-modulated module, be used for according to described corresponding relation, need in described first data flow to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain second data flow;

Weighting block is used for each symbol of second data flow is multiplied by weight, obtains the 3rd data flow;

The spectrum-spreading and scrambling module is used to use spreading code and scrambler that the 3rd data flow is carried out spectrum-spreading and scrambling, obtains exporting after the 4th data flow.

8. modulating device according to claim 7 is characterized in that:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

9. according to claim 7 or 8 described modulating devices, it is characterized in that, also comprise:

The first fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, the data in the 4th data flow is carried out full scale quantize.

10. the modulating device in the time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow is characterized in that, described modulating device comprises:

Logging modle is used for writing down the data bit of described first data flow and the corresponding relation of the modulation system of needs use;

First is provided with module, is used to set in advance following 3 one-to-one relationship:

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

Element in the product set and the one-to-one relationship between the coding in the code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

The data bit acquisition module, be used for corresponding relation according to the modulation system of data bit and the needs use of first data flow of record, modulation system that need in described first data flow to determine the current data bit handled to use, and obtain the current continuous data bit that comprises the current data bit according to the modulation system of determining;

First coding is selected module, is used for selecting first present encoding corresponding with current continuous data bit according to the one-to-one relationship between continuous data bit and the coding from described code set;

Computing module is used to calculate spreading code, the weight of current use, scrambler three's current product;

Second coding is selected module, be used for determining the corresponding currentElement of current first coding of described product set and current sum of products, and, from described code set, select second present encoding corresponding with currentElement according to the one-to-one relationship between element and the coding;

The complex value determination module, the one-to-one relationship between the complex value that is used for obtaining after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after described second present encoding being decoded as the complex value of correspondence.

11. modulating device according to claim 10 is characterized in that:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

12. according to claim 10 or 11 described modulating devices, it is characterized in that, also comprise:

The second fixed point quantization modules is used for the maximum of the absolute value of the absolute value of all real parts of the modulation system that adopts according to current time slots and all imaginary parts, described complex value is carried out full scale quantize.

13. the modulator approach in the time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow is characterized in that, described method comprises:

The corresponding relation of the modulation system that writes down the data bit in described first data flow and need to use;

According to described corresponding relation, need in described first data flow to determine the modulation system of the required use of current data bit handled, and utilize the modulation system of determining that the continuous data bit that comprises current bit is carried out data-modulated, obtain second data flow;

Each symbol in second data flow is multiplied by weight, obtains the 3rd data flow;

Use spreading code and scrambler that the 3rd data flow is carried out spectrum-spreading and scrambling, obtain exporting after the 4th data flow.

14. method according to claim 13 is characterized in that:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

15. according to claim 13 or 14 described methods, it is characterized in that, also comprise:

According to the maximum in the absolute value of the absolute value of all real parts of the modulation system that current time slots adopted and all imaginary parts, the data in the 4th data flow are carried out full scale quantize.

16. the modulator approach in the time-diviional radiocommunication system, be used for first data flow on each physical channel is carried out modulation treatment, the modulation system difference that has at least two parts data flow to use in described first data flow is characterized in that, described method comprises:

The corresponding relation of the modulation system that writes down the data bit in described first data flow and need to use;

Set in advance following 3 one-to-one relationship:

All possible continuous data bit in described at least two kinds of modulation systems;

Coding in the code set;

The complex value that obtains after the modulation system modulation of continuous data bit according to correspondence;

Second is provided with module, is used to set in advance following one-to-one relationship:

Element in the product set and the one-to-one relationship between the coding in the code set;

The all possible product of the element in coding in the described code set and the value set is formed described product set, and spreading code, weight, all possible product of scrambler three are formed described value set;

Corresponding relation according to the modulation system of data bit and needs in first data flow of record use, modulation system that need in described first data flow to determine the current data bit handled to use, and obtain the current continuous data bit that comprises the current data bit according to the modulation system of determining;

According to the one-to-one relationship between continuous data bit and the coding, from described code set, select first present encoding corresponding with current continuous data bit;

Calculate spreading code, the weight of current use, scrambler three's current product;

Determine in the described product set and the corresponding currentElement of current first coding of current sum of products, and according to element with encode between one-to-one relationship, selection second present encoding corresponding from described code set with currentElement;

One-to-one relationship between the complex value that obtains after by the modulation of corresponding modulation system according to first coding and a continuous data bit is exported after described second present encoding being decoded as the complex value of correspondence.

17. method according to claim 16 is characterized in that:

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow sends the sequencing storage according to reality; Or

First data flow of each channel takies the separate space piece respectively, and the data bit in each first data flow is pressed the storage of modulation type piecemeal; Or

First data flow of all channels according to the actual transmission sequential storage at a space piece.

18. according to claim 16 or 17 described methods, it is characterized in that, also comprise:

According to the maximum in the absolute value of the absolute value of all real parts of the modulation system that current time slots adopted and all imaginary parts, described complex value is carried out full scale quantize.

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