CN100463376C

CN100463376C - Full-adaptive intelligent antella receiving device

Info

Publication number: CN100463376C
Application number: CNB021550883A
Authority: CN
Inventors: 丁杰伟; 张峻峰; 王诚
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2002-12-20
Filing date: 2002-12-20
Publication date: 2009-02-18
Anticipated expiration: 2022-12-20
Also published as: CN1509089A

Abstract

The antenna receiving set is applied to code division multiple access (CDMA) communication system with quadriphase keying modulation in each duplex mode and array mode. The receiving set converts radio frequency signal received by antenna array through group of radio frequency channel to baseband digital signal. Data in symbol level speed are formed from these digital signals in baseband after eliminating interference and de-spread. Beam shaping is carried out for these data by the beam shaping module according to weight value provided from the module of updating weight value. The antenna realizes optimal signal received, forms strong gain of beam in direction of user signal arrival expected as well as suppresses considerable interference signal. Beam shaping is carried out in each symbol cycle. Besides, the beam shaping module possesses function for compensating channel.

Description

Outer loop power control method in CDMA system

Technical field

The present invention relates to mobile communication system, relate in particular to the outer loop power control method in CDMA system that adopts array antenna received.

Background technology

Along with rapid development of mobile communication system, code division multiple access (CDMA) technology is more and more used, code division multiple access (CDMA) is a kind of multiple access method, and it is based on spread spectrum and become another multi-address method that is applied to cellular wireless system except that existing frequency division multiple access (FDMA) and time division multiple access (TDMA) method recently.Compare with existing method, CDMA has many advantages, and availability of frequency spectrum height is for example planned simple etc.Just because of this, in 3G (Third Generation) Moblie, cdma system becomes main flow gradually.

At present, adopt the system of CDMA method mainly to comprise: narrowband CDMA (IS-95:InterimStandard 95) system, wideband CDMA (WCDMA:Wideband CDMA) system, the Cdma2000 system, TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system and TD-CDMA (Time Division-Code Division Multiple Access) system etc.Generally adopt many yards spread spectrums in these systems or claimed double-deck spreading code distribution technology, promptly in these cdma systems, reverse link spread spectrum mode from mobile subscriber to the base station can be divided into for two steps, the first step is as the channel code spread spectrum with the good orthogonal function of synchronous cross-correlation performance, Walsh (Walsh) function for example, the variable orthogonal code of spreading factor (OVSF:Orthogonal Variable Spreading Factor), this step is called and adds expansion, and the recovery process of corresponding receiving terminal is called despreading; Second step is the autocorrelation performance of the unique distribution of each user on the signal times that adds after expansion pseudo noise code (PN sequence preferably, the M sequence, the Gold sequence), this step is called scrambling, the recovery process of corresponding receiving terminal is called descrambling, above-mentioned pseudo noise code is called scrambler, distinguishes different mobile subscribers with scrambler.Equally, the spread spectrum mode of the forward link in these systems from the base station to mobile subscriber is also divided the two same steps, and unique difference is that the scrambler in the forward link is used for distinguishing base station or sub-district.The scrambler difference of different base stations or sub-district.The system of this despreading scrambling uses quarternary phase-shift keying (QPSK) (QPSK:Quadrature Phase Shift Keying) modulation usually, the QPSK signal is regarded the quadrature stack of two-way two-phase PSK (BPSK:Binary Phase Shift Keying) modulation signal usually as, is called I road signal and Q road signal.The QPSK signal also can be regarded one road complex signal as, and the I road can be regarded real part as, and the Q road can be regarded imaginary part as.

Usually adopt pilot channel to transmit frequency pilot sign in the existing cdma system, specifically comprise dual mode, a kind of is the dedicated pilot (channel) mode, the continuous pilot symbol transmitted of this mode.Another kind is to insert pilot channel system, and this mode is multiplexing in time frequency pilot sign and out of Memory symbol, and pilot symbol transmitted in the time period that has does not have pilot tone to be sent out in the time period that has.

In general mobile communication environment, the signal between base station and the travelling carriage is propagated along the some paths between the Receiver And Transmitter.This multipath transmisstion phenomenon mainly is to be caused by the reflection of signal at transmitter and receiver body surface on every side.Because the difference of different propagation path, the different multipath compositions that arrive the same signal of receivers along different paths arrive the propagation delay of receivers and arrive angle also different, thereby cause the multipath interference.In cdma system, can adopt diversity reception or diversity transmission mode to resist multipath transmisstion at the receiving course of signal.The receiver that uses in cdma system is a kind of receiver of multiple-branching construction, and wherein each branch is with synchronous along the multipath component of a certain independent propagated.Each branch is an independent receiver element, and its function is to generate and demodulation expectation received signal component.It is useful adopting relevant or incoherent method to merge the different receivers element signal in traditional cdma system, can improve received signal quality.

In cdma system, many users use identical frequency band to communicate.Owing to can not design mutual fully incoherent spreading code set, so still there is the phase mutual interference between the different user.In general, the number of users in a frequency band is many more, and interference level is just high more, and the communication quality of link is just poor more.Therefore, cdma system is an interference-limited wireless communication system, the number of channel that the frequency band of its each Rack can hold is limited, so aforesaid various technological means can only be brought up to capability of communication system to a certain degree, wanting to surpass this limit then must increase other resource.The increase power system capacity of utilizing space resources is to develop technology faster at present with improving systematic function, the analysis showed that in theory as long as correctly use one group of antenna, forms the new degree of freedom and space, just can increase power system capacity significantly.In addition, adopting rationally utilizes space resources can also reduce power consumption, increases anti-fading and antijamming capability, more effectively switches and better fail safe and system robustness.

Improve systematic function in order to increase power system capacity, a kind of direct method of utilizing space resources is to use directional antenna, and wireless system is divided into the sector.Can reduce the phase mutual interference between travelling carriage in the base station receiver of employing sector significantly.This be because: the general interference is evenly distributed on the different incident directions, thereby its quantity can reduce by sectorization.Certainly all realize sectorization on the both direction of transmission, the capacity income that sectorization provided is proportional to the quantity of sector.

Sectorization can adopt a kind of soft handover of special shape, promptly softer handover.Wherein travelling carriage is by carrying out from one of them sector to the soft handover of another sector with two sector communication simultaneously.Although handover has improved quality of connection, sectorization has increased power system capacity, and mobile these travelling carriages that caused naturally of a plurality of travelling carriages are carried out some number of times from a sector to the handover of another sector, and this has increased the load of system.Some handovers also produced several travelling carriages simultaneously with the situation of a plurality of sector communication, thereby because travelling carriage will be in the zone of broad received signal and lost the advantage of the power system capacity that sectorization increased.

For the different spaces characteristic of further utilizing unlike signal improves systematic function, a lot of people have studied intelligent antenna technology, the array antenna technology of also challenging an opponent to a fight when two armies meet.Smart antenna adopts plural single antenna array element to form antenna array, and the signal that receives of each array element is weighted summation in base band with proper weight through after the radio frequency processing, just can reach the effect of directional reception.The weighted sum process also can be called the wave beam forming process, its essence is a kind of space filtering, and smart antenna also can be thought a kind of space division multiple access (SDMA:Space-Division Multiple-Access) technology.In SDMA, pass through the aerial array received signal, and carry out digital beam forming (DBF:Digital Beam Forming), make the signal to noise ratio maximum of desired signal by Digital Signal Processing.This is to make desired signal by being strengthened with superimposed by the phase place of adjusting the signal that aerial array received, and other interference signal is weakened realization by non-with superimposed.For adopting the system of CDMA multi-access mode, use SDMA than with other technology of utilizing space resources, as sectorization, have many advantages.If in the sectorization process for increasing the availability of frequency spectrum sector beam that narrows, then in the system switching times between the sector also along with increase.This has just correspondingly increased the load of base station controller.

Smart antenna can divide three kinds substantially by its performance is good and bad.

A kind of is the switched-beam smart antenna.This scheme is to preestablish the wave beam weight that some point to different directions, reasonable those wave beam weight weighted results of selective reception signal are carried out subsequent treatment in communication process, as Chinese patent 98800049 (adaptive array antenna), also has the GSMSpotlight smart antenna of U.S. metawave company.The shortcoming of this method is to need better more weights in advance of design, does not also make full use of the signal space distribution character in the concrete moment, can not well improve the signal to noise ratio of received signal.But the realization thinking of this method is easy to expect.

Second kind is the part adaptive smart antenna.This implementation is the information at the direction of arrival of signal angle of extraction desired user from the array signal that receives usually, forms then and point to the wave beam that arrives deflection, and the arrival direction angle changes then and then variation of weights.The criterion of this algorithm is the signal energy maximum that makes the desired user that receives, the interference of simultaneously limited other direction of compacting.Phase array just belongs to such technology, and all amplitudes of phase array are the same, can not change, and has only the adaptive change of phase potential energy.The performance of part adaptive smart antenna is better than switched-beam smart antenna, but does not utilize signal space information fully, and adaptive range is also limited, and extracts the algorithm more complicated that reaches deflection, can real-time implementation still be a problem.The patent that many this respects are also arranged, as Chinese patent 97104039 (time division SCDMA wireless communication system) with smart antenna, Chinese patent 97202038 (directional control circuit that is used for adaptive antenna), Chinese patent 99105647 (adaptive array antenna of optimizing shape beam in advance that is used for code division multiple access system).

Another kind is the fully adaptive smart antenna.The weights of this antenna do not need to set in advance, bring in constant renewal in weights but press certain criterion according to the variation of signal space distribution character, the amplitude of weights and phase place can be upgraded freely, the spatial character that this method can make full use of the signal of desired user and interference signal when update algorithm restrains makes the Signal to Interference plus Noise Ratio of the signal that receives reach maximum, and the part adaptive smart antenna does not generally consider to disturb arrival direction.This is very yearning result, can be described as the tidemark of smart antenna, and also the someone has applied for the patent of this respect, as Chinese patent 99104709 (adaptive antenna).

Other relevant patent with smart antenna also has United States Patent (USP) U.S4599734 (the space diversity communication system of multidirectional time-multiplexed communication), United States Patent (USP) U.S550735 (diversity transmission in the mobile/indoor cellular wireless communication system) and Chinese patent 96194112 (base station equipment, and a kind of launching technique of control antenna beam direction).

In cdma system, the adaptive smart antenna system can be divided into chip-level wave beam forming and symbol level wave beam forming by the implementation of wave beam forming.The chip-level wave beam forming carried out the spatial weighting summation before descrambling and de-spreading, this method is to only needing in the processing procedure of a multipath signal with a descrambling and de-spreading module, but the weighted sum that this method all needed to carry out once plural number in each sampling period is calculated, and amount of calculation is bigger.And the symbol level wave beam forming carries out the spatial weighting summation after descrambling and de-spreading, need to use in the processing procedure of this method to a multipath signal and the as many descrambling and de-spreading module of number of antennas, but the weighted sum that this method only needs to carry out once plural number in a symbol period is calculated.The data of scrambler and spreading code generally get 1 or-1, and the descrambling and de-spreading process is just carried out XOR calculating to the sign bit of data, calculates very simple.If spreading factor is 64 (symbol period equals 64 chip period), every chip period sampling 2 times, then tens times of the amount of calculation is-symbol level wave beam forming amount of calculation of chip-level wave beam forming.

Obviously use the wireless communication system of fully adaptive aerial array can reach best systematic function, also need to solve some critical technical problems but use in practice at present.Wherein the computation complexity of adaptive algorithm and convergence rate are exactly one of difficult problem of restriction adaptive antenna development.In the above-mentioned patent that relates to the fully adaptive smart antenna, or just propose the framework that system realizes, do not had concrete implementation method; Proposed to comprise the update method of matrix inversion operation, effective realization of this method is very difficult; This method the method for some chip-level wave beam formings proposed, though can realize that its amount of calculation is still bigger.At IEICE.TRANS.FUNDAMENTALS.VOL.E80-A, among the Pilot Symbol-Assisted Decision-Directed Coherent Adaptive Array Diversity for DS-CDMA Mobile Radio Reverse Link of No.12DECEMBER, symbol level wave beam forming and right value update algorithm have been introduced, but this algorithm is at the QPSK modulation system of a channel, be not suitable for the WCDMA system, in addition, special channel estimating compensating module must be arranged in this algorithm, the reference signal of right value update algorithm is plural, and it needs 30 frames (0.3 second) to restrain.Even the part Adaptable System, because the computation complexity that the arrival direction angle is estimated and the reality of multipath transmisstion still are in theoretical research stage.So simple and effective adaptive algorithm is the decisive core technology of smart antenna development.

Summary of the invention

At the problem that exists in the existing smart antenna receiving system, as, do not make full use of the signal space distribution character in the concrete moment for the switched-beam antenna system, can not well improve the signal to noise ratio of received signal; Do not utilize signal space information fully for part adaptive smart antenna system, adaptive range is limited, extracts the algorithm complexity that reaches deflection; Realize complexity for the fully adaptive antenna system, especially the adaptive algorithm amount of calculation is big.

The objective of the invention is to propose simple and high-efficient symbol level outer loop power control method in CDMA system, this device can be applied to adopt the employing quadriphase keying of various array way and various duplex modes to modulate in code division multiple access (CDMA) communication system of (QPSK).

In order to achieve the above object, the present invention adopts following technical scheme:

This outer loop power control method in CDMA system comprises:

As shown in Figure 1, aerial array 101, radio-frequency channel group 102, descrambling module 103, Q road despreading integration module 104, Q road wave beam forming module 105, right value update module 106, I road despreading integration module 107 and I road wave beam forming module 108,

Described aerial array 101 comprises two or more bays, and the output of these antenna array element is received the input of radio-frequency channel group 102;

Described radio-frequency channel group 102 comprises two or more radio-frequency channels, the corresponding bay in each radio-frequency channel, the output of a bay of each radio-frequency channel input termination, the output of all radio-frequency channels is received the input of described descrambling module 103;

The input signal of described descrambling module 103 is the output signal of described radio-frequency channel group 102, and consequential signal outputs to I road despreading integration module and Q road despreading integration module.Described descrambling module is finished the descrambling process;

The input signal of described Q road despreading integration module 104 is each road output signal of descrambling module, and the result outputs to Q road wave beam forming module 105 and right value update module 106.Described Q road despreading integration module 104 is finished the despreading integration of Q road signal;

The input signal of described Q road wave beam forming module 105 is the output signal of described Q road despreading module 104 and the weights output signal of described right value update module 106, and described Q road wave beam forming module 105 is finished the function of complex weighted summation;

The input signal of described right value update module 106 comprises the output signal of described Q road despreading integration module 104, the output complex signal DQ and the frequency pilot sign of described Q road wave beam forming module 105, the result outputs to described Q road wave beam forming module 105 and I road wave beam forming module 108, and described right value update module is finished the function of right value update;

The input signal of described I road despreading integration module 107 is each road output signal of descrambling and de-spreading module 103, and the result exports I road wave beam forming module 108; Described I road despreading integration module is finished the function behind the despreading integration on I road;

The input signal of described I road wave beam forming module 108 is the output signal of described I road despreading module 107 and the weights output signal of described right value update module 106, and described I road wave beam forming module is finished the function of complex weighted summation;

Described right value update module 106 comprises:

As described in Figure 2, convergence factor register 201, judging module 202, selection module 203, amplitude adjusting module 204, subtracter 205,

real multipliers

206 and 207, complex multiplier group 208, weights adjusting module 209 and weights registers group 210,

Described convergence factor register 201 is deposited the convergence factor numerical value that sets in advance, and uses for

real multipliers

206 and 207;

The imaginary part DQ.i of 202 pairs of inputs of described judging module data DQ carries out symbol judgement, selects module 203 if the result outputs to;

Described selection module 203, the input data are the dateout of frequency pilot sign and judging module 202.Select module 203 to select data to output to amplitude adjusting module 204;

Described amplitude adjusting module 204, the input data are for selecting the dateout of module 203, and data output to the plus sige end of subtracter 205;

The input data of described subtracter 205 are dateouts of DQ.i and amplitude adjusting module 204, and the result outputs to real multipliers 206;

Described real multipliers 206 multiplies each other the data of subtracter 205 outputs and the convergence factor numerical value in the convergence factor register 201.Described real multipliers 207 multiplies each other the real part DQ.r of DQ (input signal of right value update module 106) and the convergence factor numerical value in the convergence factor register 201.Above-mentioned two

real multipliers

206 and 207 DQE.r as a result that obtain and DQE.i send into complex multiplier group 208 as real part and the imaginary part of a plural DQE respectively;

The input data of described complex multiplier group 208 are the dateout of Q road despreading integrator and the complex data DQE of two

real multipliers

206 and 207 outputs.Complex multiplier is finished the function of complex multiplication, and the result outputs to weights adjusting module 209;

Described weights adjusting module 209, input signal is the current complex-valued weights vector of value register group 210 extractions as a matter of expediency and the output result of complex multiplier group 208, described right value update module is finished the function of right value update, and the result is input to weights registers group 210.

The real part of described weights registers group 210 storage weighted vectors and imaginary part output to I road wave beam forming module and Q road wave beam forming module for 209 extractions of weights adjusting module with after upgrading.

Described right value update module 106 comprises:

As shown in Figure 3, convergence factor register 301, amplitude adjusting module 302, subtracter 303,

real multipliers

304 and 305, complex multiplier group 306, weights adjusting module 307 and weights registers group 308.

Compare with right value update module shown in Figure 2, described right value update module has been lacked judgement mould 202 and has been selected module 203, the direct input range adjusting module 302 of frequency pilot sign Pilot, and the result of amplitude adjusting module imports the plus sige end of subtracter 303.The minus sign end of DQ.i input subtracter 303.The connected mode of other submodule and the function of finishing are identical with corresponding submodule in the right value update module shown in Figure 2.

Described right value update module 106 comprises:

As shown in Figure 4, convergence factor register 401, judging module 402, amplitude adjusting module 403, subtracter 404,

real multipliers

405 and 406, complex multiplier group 407, weights adjusting module 408 and weights registers group 409.

Compare with right value update module shown in Figure 2, described right value update module has been lacked selection module 203, there is not frequency pilot sign Pilot input, the direct input range adjusting module 403 of result that obtains after DQ.i input judging module 402 is adjudicated, amplitude is adjusted the plus sige end that the result imports subtracter 404.The minus sign end of DQ.i input subtracter 404.Corresponding submodule in the connected mode of other submodule and the function of finishing and the right value update module shown in Figure 2 identical.

This smart antenna receiving system also comprises:

Aerial array 501, radio-frequency channel group 502, descrambling module 503, Q road despreading integration module 504, Q road wave beam forming module 505, right value update module 506, I road despreading integration module 507, I road wave beam forming module 508, channel estimation module 509, Q road signal compensation module 510 and I path channels compensating module 511 as shown in Figure 5.

Corresponding antenna arrays row 101 in described aerial array 501, radio-frequency channel group 502, descrambling module 503, Q road despreading integration module 504, I road despreading integration module 507, I road wave beam forming module 508 and the outer loop power control method in CDMA system shown in Figure 1, radio-frequency channel group 102, descrambling module 103, Q road despreading integration module 104, I road despreading integration module 107, I road wave beam forming module 108 are identical.

The Q road wave beam forming module 105 that described Q road wave beam forming module 505 and Fig. 1 are is all fours also.Only its dateout DQ outputs to right value update module 506 simultaneously, channel estimation module 509 and Q path channels compensating module 510.

The result with channel estimating of described channel estimation module 509 is sent to Q path channels compensating module 510 and I path channels compensating module 511 to finish the function of channel estimating.

The input signal of described channel compensation block 510 is the output result of DQ and channel estimation module 509.The real data DRQ that obtains behind the channel compensation, its result output to follow-up processing module and right value update module 506.

The input signal of described channel compensation block 511 is the output result of DI and channel estimation module 509, and the real data DRI that obtains behind the channel compensation outputs to follow-up processing module.

Described right value update module 506 is similar with right value update module 106 shown in Figure 1, and its input signal comprises output complex signal DQ, frequency pilot sign Pilot and the Q path channels compensation result DRQ of the output signal of described Q road despreading integration module, described Q road wave beam forming module 505.Described right value update module 506 is finished the complex-valued weights renewal and the result is outputed to described Q road wave beam forming module 505 and I road wave beam forming module 508.

Described right value update module 506 comprises:

As shown in Figure 6, convergence factor register 601, judging module 602, selection module 603, amplitude adjusting module 604, subtracter 605, real multipliers 606 and 607, complex multiplier group 608, weights adjusting module 609 and weights registers group 610.

The input data of described judging module 602 are the output result data DRQ of Q path channels compensating module 510.Data DQ.i no longer imports described judging module 602.Other all submodules are all identical with corresponding submodule in the right value update module 106 shown in Figure 2.

Described right value update module 506 comprises:

Convergence factor register, amplitude adjusting module, subtracter, 2 real multipliers, complex multiplier group, weights adjusting module and weights registers group.Described right value update module and right value update module 106 shown in Figure 3 are just the same.

Described right value update module 506 comprises:

As shown in Figure 7, convergence factor register 701, judging module 702, amplitude adjusting module 703, subtracter 704,

real multipliers

705 and 706, complex multiplier group 707, weights adjusting module 708 and weights registers group 709.

Compare with right value update module shown in Figure 6, described right value update module has been lacked selection module 603, there is not frequency pilot sign Pilot input, DRQ is input to the direct input range adjusting module 703 of result that obtains after judging module 702 is adjudicated, amplitude is adjusted the plus sige end that result data is sent to subtracter 704, and DQ.i is input to the minus sign end of subtracter 704 simultaneously.The connected mode of other submodule and the function of finishing are identical with corresponding submodule in the right value update module shown in Figure 6.

Described construction module, it can be hardware module, also can be software module, can be made in these modules among special chip or the FPGA (Field Programmable Gate Array), also can in DSP (Digital Signal Processor), realize a part of module with software.Above-described module makes things convenient for man-made division and name in order to narrate, and in actual device, as long as corresponding annexation is arranged, just can realize function corresponding.

Owing to adopted technique scheme, outer loop power control method in CDMA system of the present invention has been realized the fully adaptive smart antenna solutions of received signal best performance with less hardware resource, can form very strong beam gain at the arrival direction of desired user, utilize signal behind pilot tone or the despreading integration as the reference signal, adjusting weights in conjunction with channel environmental information is close signal and reference signal behind the wave beam forming, thereby reach the effect that improves desired signal gain and compacting interference signal and can adapt to the wireless signal environment, the wave beam forming module of smart antenna of the present invention has the function of channel compensation concurrently simultaneously.Outer loop power control method in CDMA system of the present invention carries out wave beam forming one time at each symbol period, the existing intelligent antenna technology of comparing, this receiving system has been avoided matrix inversion calculating, wave beam integration algorithm and the signal angle of arrival judge and calculate, and the complexity of calculating is than low many of chip-level beamforming algorithm.

Description of drawings

Fig. 1 is the overall construction drawing that symbol level outer loop power control method in CDMA system of the present invention is realized according to the mode of not utilizing the channel estimating compensation.

Fig. 2 is the detailed structure view that the module of right value update described in Fig. 1 is used for inserting navigation system.

Fig. 3 is the detailed structure view that the module of right value update described in Fig. 1 is used for the continuous pilot system.

Fig. 4 is the detailed structure view that the module of right value update described in Fig. 1 is used for not having the system of pilot tone.

Fig. 5 is the overall construction drawing that symbol level outer loop power control method in CDMA system of the present invention is realized according to the mode of utilizing the channel estimating compensation.

Fig. 6 is the detailed structure view that the module of right value update described in Fig. 5 is used for inserting navigation system.

Fig. 7 is system's detailed structure view that the module of right value update described in Fig. 5 is used for not having pilot tone.

Fig. 8 is the schematic diagram of complex multiplier.

Fig. 9 is applied in a specific embodiment structure chart in the WCDMA system according to the present invention.

To be outer loop power control method in CDMA system of the present invention receive the error variation diagram of beamformed signals and standard signal in the example at signal to Figure 10.

Figure 11 is the variation schematic diagram of outer loop power control method in CDMA system of the present invention wave beam in signal reception example.

Embodiment

Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme, according to these structure charts, the technical staff in same field can be easy to realize device of the present invention.

Outer loop power control method in CDMA system of the present invention can be divided into two classes according to implementation: utilize channel estimating compensation and do not utilize the channel estimating compensation; This receiving system of realizing according to different modes can be applied to use in the system of different pilot configurations: insert pilot tone, and continuous pilot and do not have pilot tone, this receiving system in the various systems has difference slightly.Narrate under the different implementations outer loop power control method in CDMA system of the present invention below respectively for different pilot configurations.

1. do not utilize the symbol level outer loop power control method in CDMA system of channel estimating compensation.

Fig. 1 is the symbol level outer loop power control method in CDMA system overall construction drawing that the present invention does not utilize the channel estimating compensation.Do not utilize the channel estimating compensation to refer to the result who does not utilize the channel estimating compensation in the weight renewing method.In whole system, the channel estimating compensating module can be arranged, can there be the channel estimating compensating module yet.This smart antenna receiving system consists of the following components: aerial array 101, radio-frequency channel group 102, descrambling module 103, Q road despreading integration module 104, Q road wave beam forming module 105, right value update module 106, I road despreading integration module 107 and I road wave beam forming module 108.Because the scrambler in the receiving system produces, spreading code produces, and sign indicating number is synchronous, and the function of modules such as clock control is not the content that the present invention is concerned about, does not generally describe these modules in the present invention, directly quotes these modules or its output signal when needing.

Described aerial array 101 comprises two or more bays, and the output of these antenna array element is received the input of radio-frequency channel group 102; The antenna pattern of bay and the arrangement mode of aerial array are arbitrarily.

Described radio-frequency channel group 102 comprises two or more radio-frequency channels, the corresponding bay in each radio-frequency channel, the output of a bay of each radio-frequency channel input termination, the output of all radio-frequency channels is received the input of described descrambling module 103.The function of radio-frequency channel group is that the low noise of finishing each road signal amplifies, automatic gain control, demodulation, channel correcting, baseband-converted, A/D sampling and matched filtering.

The output signal of the described radio-frequency channel group 102 of the input signal of described descrambling module 103, result output to I road despreading integration module and Q road despreading integration module.The multichannel complex signal of same plural scrambler S of described descrambling module 103 usefulness and input multiplies each other, finish the descrambling process, because the real part and the imaginary part value of plural scrambler are+1 or-1, so multiplication processes described here is exactly the XOR process of scrambler and input signal sign bit, its amount of calculation is also littler than add operation.

The input signal of described Q road despreading integration module 104 is each road output signal of descrambling module, consequential signal XI.1, and XI.2 ... XI.M (M is the bay number, hereinafter also together) outputs to Q road wave beam forming module 105 and right value update module 106.Described Q road despreading integration module 104 is finished the despreading integration of Q road signal, because (WCDMA system of many systems, CDMA2000 system etc.) the Q road spread spectrum code sequence in is a full sequence, so as long as just can finish despreading process with integration zero clearing device, the quantity of integration zero clearing device and the quantity of bay equate, if the spreading code on Q road is not a full sequence, then each road signal of input also will be multiplied by spreading code earlier, at this moment Q road despreading integration module 104 and I road despreading integration module 107 (back narration) structure is identical, and just spreading code is the spread spectrum codes C Q on Q road.

The input signal of described Q road wave beam forming module 105 is the output signal of Q road despreading module 104 and the weights output signal of described right value update module 106, and its output signal DQ is sent to right value update module 106 and subsequent treatment module simultaneously.Described Q road wave beam forming module 105 usefulness complex-valued weights are carried out complex weighted summation to the signal of Q road despreading integration 104 outputs.

The input signal of described right value update module 106 comprises each road output signal XI.1 of described Q road despreading integration module, XI.2, XI.M, the output complex signal DQ of described Q road wave beam forming module 105, frequency pilot sign Pilot (if there is not pilot channel in the system, this input can omit).Described right value update module 106 is used to realize right value update and obtains one group of new complex-valued weights, should organize then complex-valued weights (W.1, W.2 ... W.M) output to described Q road wave beam forming module 105 and I road wave beam forming module 108.

The input signal of described I road despreading integration module 107 is each road output signal of described descrambling and de-spreading module 103, and output signal is sent to I road wave beam forming module.Described I road despreading integration module 107 is finished the despreading integration on I road, in I road despreading integration module, at first multiply each other with I road spread spectrum codes C I and each road input signal, multiplied result is sent into each integration zero clearing device respectively, integration zero clearing transposition quantity equates with bay number M, because spreading code data value is+1 or-1, " multiplying each other " described here is the XOR that spreading code and input data symbol are, the result of integration is sent to I road wave beam forming module 108 as the dateout of I road despreading integration module 107.

The input signal of described I road wave beam forming module 108 is the output signal of described I road despreading module 107 and the weights output signal of described right value update module 106.The signal that described I road wave beam forming module 108 usefulness complex-valued weights are come to I road despreading integration 107 carries out complex weighted summation, and the result outputs to the subsequent treatment module.

As shown in Figure 1, the radiofrequency signal that receives from aerial array 101 is converted to baseband digital signal by radio-frequency channel group 102, and these baseband digital signals pass through descrambling module 103 and I road, Q road despreading integration module 104 earlier, 107 carry out descrambling and de-spreading, form the data of symbol level speed.The wave beam forming module 105,108 that the sign level data on Q road, I road is sent into Q road, I road is respectively carried out wave beam forming and is obtained data DQ respectively, DI, and then DQ, DI is sent to follow-up processing module.Wherein the weights of wave beam forming are provided in real time by right value update module 106.The input data that right value update module 106 needs are data XI of Q road despreading integration module output, the data DQ of Q road wave beam forming module 105 outputs, frequency pilot sign (if pilot tone is provided in the system).

Described right value update module 106 is made of a plurality of submodules, can be divided into corresponding three kinds of constituted modes according to the difference of pilot configuration in the system.Narration respectively below:

1) corresponding to the right value update module 106 of inserting navigation system

Fig. 2 is the detailed structure view of right value update module 106 in inserting navigation system.In inserting navigation system, right value update module 106 is made of following submodule: convergence factor register 201, judging module 202, selection module 203, amplitude adjusting module 204, subtracter 205,

real multipliers

206 and 207, complex multiplier group 208, weights adjusting module 209 and weights registers group 210.

real multipliers

206 and 207.

Described judging module 202, input data are the imaginary part DQ.i (i represents imaginary part, and r represents real part, and the back together) of DQ (one of input signal of right value update module 106).202 pairs of inputs of judging module data DQ.i carries out symbol judgement, if DQ.i just exports 1 greater than zero, otherwise output-1.The result outputs to and selects module 203.

Described selection module 203, the input data are the dateout of frequency pilot sign Pilot and judging module 202.Select the signal of module 203, select frequency pilot sign Pilot to output to amplitude adjusting module 204 as dateout in the pilot tone time period in non-pilot tone time period selection judging module 202.

Described amplitude adjusting module 204, the input data are for selecting the dateout of module 203, and value is+1 or-1.If the input data of amplitude adjusting module are+1, then amplitude adjusting module is exported a positive number A, if be input as-1, output-A then, the concrete condition that the size of A is realized by baseband system is determined, if system need set A=1, then amplitude adjusting module can be omitted, and data output to the plus sige end of subtracter 205.

The input data of described subtracter 205 are dateouts of DQ.i and amplitude adjusting module 204, and wherein DQ.i connects the minus sign end, and the dateout of amplitude adjusting module 204 connects the addition end.Subtracter 205 deducts the minus sign end data to the plus sige end data, and the result who obtains outputs to real multipliers 206.

real multipliers

206 and 207 DQE.r as a result that obtain and DQE.i send into complex multiplier group 208 as real part and the imaginary part of a plural DQE respectively.

Described complex multiplier group 208 is made up of M complex multiplier, the input data of each complex multiplier are the corresponding one tunnel dateout (XI.1 of Q road despreading integrator, XI.2 ..., XI.M) with two real multipliers 206 and the 207 complex data DQE that export.Complex multiplier DQE and XI.m (m=1,2 ..., M) carry out complex multiplication respectively, the M road complex data that obtains outputs to weights adjusting module 209.

Described weights adjusting module 209, input signal are the current complex-valued weights vector of value register group 210 extractions as a matter of expediency and the output result of complex multiplier group 208.The real part of each complex-valued weights component adds corresponding complex multiplier output result's real part, the imaginary part of each complex-valued weights component deducts corresponding complex multiplier output result's imaginary part, obtain new complex result as new weights vector, be input in the corresponding registers of weights registers group 210.

Described weights registers group 210, there be 2M real number register to store the real part and the imaginary part of weighted vector (M complex-valued weights component), these data are extracted for weights adjusting module 209 and are upgraded, and output to I road wave beam forming module and Q road wave beam forming module simultaneously.

As shown in Figure 2, if be in the pilot tone time period, then do reference signal with frequency pilot sign, if be in the non-pilot tone time period, the result of usefulness DQ.i symbol judgement as a reference.This function is by judging module 202 and select module 203 to finish.Reference signal is carried out amplitude adjustment (by amplitude adjusting module 204) deduct DQ.i, obtain representing the error signal of current demand signal and reference signal difference.The reason of the amplitude of carrying out adjustment is generally to use the integer represent signal magnitude in the actual hardware implementation procedure, and often wishes that the received signal amplitude has bigger value, so the amplitude of reference signal is generally all big than 1.Error signal that subtracter 205 comes out and DQ.r are multiplied by a convergence factor, obtain a complex signal DQE.Convergence factor is used for the control wave beam weight and upgrades amplitude.In complex multiplier group 208, the data XI (vector has M complex number components) and the DQE of Q road despreading integration output are carried out complex multiplication, what obtain is still a complex vector, sends in the weights adjusting module 209.Extract current weighted vector W in the weights adjusting module 209 value register groups 210 as a matter of expediency, deduct the real part of complex multiplier group 209 output vectors then with the real part of current weighted vector, imaginary part with the current weight vector adds the imaginary part that the complex multiplier group is exported, and obtains new weighted vector and sends into the old weighted vector of weights registers group 210 replacements.Weights registers group 210 is sent to I road and Q road wave beam forming module to the weights data in the current register at any time.

2) corresponding to the right value update module 106 of continuous pilot system

Fig. 3 is the detailed structure view of right value update module 106 in the continuous pilot system.In the continuous pilot system, right value update module 106 is made of following submodule: convergence factor register 301, amplitude adjusting module 302, subtracter 303,

real multipliers

Compare with the right value update module of insertion navigation system shown in Figure 2, right value update module in the continuous pilot system has been lacked judgement mould 202 and has been selected module 203, the direct input range adjusting module 302 of frequency pilot sign Pilot, the result of amplitude adjusting module imports the plus sige end of subtracter 303.The minus sign end of DQ.i input subtracter 303.The connected mode of other submodule is identical with the connected mode of corresponding submodule in inserting pilot tone right value update module.The function that all submodules are finished with insert navigation system in the right value update module in the function finished of corresponding submodule all the same.

As shown in Figure 3, compare with Fig. 2, the generation difference of reference signal just, because continuous pilot is arranged, just directly pilot signal input range adjusting module 302, to deduct DQ.i be exactly error signal to data after adjusting.Other handle with Fig. 2 in the same.

3) corresponding to the right value update module 106 of the system that does not have pilot tone

Fig. 4 is the detailed structure view of right value update module 106 in not having the system of pilot tone.In not having the system of pilot tone, right value update module 106 is made of following submodule: convergence factor register 401, judging module 402, amplitude adjusting module 403, subtracter 404,

real multipliers

Compare with the right value update module of insertion navigation system shown in Figure 2, do not have navigation system in the right value update module lacked selection module 203, there is not frequency pilot sign Pilot input, the direct input range adjusting module 403 of result that obtains after DQ.i input judging module 402 is adjudicated, amplitude is adjusted the plus sige end that the result imports subtracter 404.The minus sign end of DQ.i input subtracter 404.The connected mode of other submodule is identical with the connected mode of corresponding submodule in inserting pilot tone right value update module.The function that all submodules are finished with insert navigation system in the right value update module in the function finished of corresponding submodule all the same.

As shown in Figure 4, comparing with Fig. 2, is the generation difference of reference signal also, owing to there is not pilot tone, just the data input range adjusting module 403 after the DQ.i judgement, reference signal just is used as in adjustment data afterwards, and it is exactly error signal that reference signal deducts DQ.i.Other handle with Fig. 2 in the same.

2. utilize the symbol level outer loop power control method in CDMA system of channel estimating compensation.

Fig. 5 is the symbol level outer loop power control method in CDMA system overall construction drawing that the present invention utilizes the channel estimating compensation.The meaning of utilizing the channel estimating compensation is exactly to utilize channel estimating compensation data afterwards to carry out the right value update computing.This smart antenna receiving system consists of the following components: aerial array 501, radio-frequency channel group 502, descrambling module 503, Q road despreading integration module 504, Q road wave beam forming module 505, right value update module 506, I road despreading integration module 507, I road wave beam forming module 508, channel estimation module 509, Q road signal compensation module 510 and I path channels compensating module 511.Equally, the scrambler in the receiving system produces, and spreading code produces, and sign indicating number is synchronous, and the function of modules such as clock control is not the content that the present invention is concerned about, does not generally describe these modules in the present invention, directly quotes these modules or its output signal when needing.

Described aerial array 501, radio-frequency channel group 502, descrambling module 503, Q road despreading integration module 504, I road despreading integration module 507, I road wave beam forming module 508 and do not have corresponding antenna arrays row 101 in the symbol level outer loop power control method in CDMA system of channel estimating compensation, radio-frequency channel group 102, descrambling module 103, Q road despreading integration module 104, I road despreading integration module 107, I road wave beam forming module 108 identical.

Described Q road wave beam forming module 505 and foregoing Q road wave beam forming module 105 be all fours also.Only its dateout DQ outputs to right value update module 506 simultaneously, channel estimation module 509 and Q path channels compensating module 510.

The function of described channel estimation module 509 is to finish channel estimating, and the result of channel estimating is sent to Q path channels compensating module 510 and I path channels compensating module 511, and these two channel compensation block compensate I road Q circuit-switched data respectively.The method of many channel estimating compensation has been arranged at present, and the present invention is indifferent to the concrete Method Of Accomplishment of channel estimating compensation.

The input signal of described channel compensation block 510 is the output result of DQ and channel estimation module 509.The real data DRQ that obtains behind the channel compensation outputs to follow-up processing module on the one hand, outputs to right value update module 506 (in the continuous pilot system, DRQ need not import right value update module 506) on the one hand.

The input signal of described channel compensation block 511 is the output result of DI (dateout of I road wave beam forming module) and channel estimation module 509.The real data DRI that obtains behind the channel compensation outputs to follow-up processing module.

Described right value update module 506 and right value update module noted earlier 106 are similar, its input signal comprises each road output signal XI.1 of described Q road despreading integration module, XI.2, XI.M, the output complex signal DQ of Q road wave beam forming module 505, frequency pilot sign Pilot (if there is not pilot channel in the system, this input can omit), and Q path channels compensation result DRQ.Right value update module 506 is used to realize right value update and obtains one group of new complex-valued weights, should organize then complex-valued weights (W.1, W.2 ... W.M) output to described Q road wave beam forming module 505 and I road wave beam forming module 508.

As shown in Figure 5, the radiofrequency signal that receives from aerial array 501 is converted to baseband digital signal by radio-frequency channel group 502, and these baseband digital signals pass through descrambling module 503 and I road, Q road despreading integration module 504 earlier, 507 carry out descrambling and de-spreading, form the data of symbol level speed.The wave beam forming module 505,508 that the sign level data on Q road, I road is sent into Q road, I road is respectively carried out wave beam forming and is obtained data DQ, DI respectively.More than these all with Fig. 1 in the same.Then DQ is sent to channel estimation module 509, the channel compensation block 510 on Q road and right value update module 506 are sent to I path channels compensating module 511 to DI.Right value update module 506 is sent in the output that the estimated result of channel estimation module 509 is sent to channel

compensation block

510 and 511. channel compensation block 510 DRQ as a result.Wherein the weights of wave beam forming module 505,508 are provided in real time by right value update module 506.The input data that right value update module 506 needs also have the data XI of Q road despreading integration module output, frequency pilot sign Pilot (if pilot tone is provided in the system).

Described right value update module 506 is made of a plurality of submodules, can be divided into corresponding three kinds of constituted modes according to the difference of pilot configuration in the system.Narration respectively below:

1. insert the right value update module 506 of navigation system

Fig. 6 is the specific implementation form of right value update module 506 in inserting navigation system.In inserting navigation system, right value update module 506 is made of following submodule: convergence factor register 601, judging module 602, selection module 603, amplitude adjusting module 604, subtracter 605, real multipliers 606 and 607, complex multiplier group 608, weights adjusting module 609 and weights registers group 610.Wherein the input data of judging module 602 are the output result data DRQ of Q path channels compensating module 510.Data DQ.i no longer imports judging module 602.In addition, all submodules are all identical with corresponding submodule in the right value update module 106 of insertion navigation system shown in Figure 2.

As shown in Figure 6, if be in the pilot tone time period, then do reference signal with frequency pilot sign, if be in the non-pilot tone time period, the compensation result DRQ of Q path channels compensating module 510 carries out result behind the symbol judgement as the reference signal by judging module 602.Reference signal is carried out amplitude adjustment (by amplitude adjusting module 604) deduct DQ.i, obtain representing the error signal of current demand signal and reference signal difference.Corresponding contents is just the same among remaining processing or structure (being multiplied by convergence factor, complex multiplier group, weights adjusting module, weights registers group) and Fig. 2.

2. the right value update module 506 in the continuous pilot system

In the continuous pilot system, the right value update module 106 in right value update module 506 and the continuous pilot system that does not utilize channel estimating compensation shown in Figure 3 is just the same.In the continuous pilot system detailed structure view of right value update module 506 also with Fig. 3 in structure just the same.

3. there is not the right value update module 506 in the system of pilot tone

Fig. 7 is the detailed structure view of right value update module 506 in not having the system of pilot tone.In not having the system of pilot tone, right value update module 506 is made of following submodule: convergence factor register 701, judging module 702, amplitude adjusting module 703, subtracter 704,

real multipliers

Compare with the right value update module of insertion navigation system shown in Figure 6, there is not the right value update module in the system of pilot tone to lack selection module 603, there is not frequency pilot sign Pilot input, DRQ is input to the direct input range adjusting module 703 of result that obtains after judging module 702 is adjudicated, amplitude is adjusted the plus sige end that result data is sent to subtracter 704, and DQ.i is input to the minus sign end of subtracter 704 simultaneously.The connected mode of other submodule is identical with the connected mode of corresponding submodule in inserting pilot tone right value update module.The function that all submodules are finished with insert navigation system in the right value update module in the function finished of corresponding submodule all the same.

As shown in Figure 7, compare with Fig. 6, the also generation difference of reference signal just, owing to there is not pilot tone, just the data input range adjusting module 403 after the DRQ judgement, to deduct DQ.i be exactly error signal to data after adjusting.Other handle with Fig. 6 in the same.

Fig. 8 is the structural representation of complex multiplier, finishes plural A and multiply by the result that plural B obtains plural C, as can be seen from Fig. 8 the clear structure of complex multiplier.

Fig. 9 is an application example of apparatus of the present invention, and apparatus of the present invention and Rake (RAKE) receiver are combined.Wireless signal converts baseband digital signal to by aerial array 901 and radio-frequency channel group 902 and sends into Rake receiver 903.Rake receiver 903 is by a plurality of (such as P) branch's receiver 903.1,903.2 ..., 903.P forms, and wherein each branch's receiver all adopts receiving system of the present invention.The data of each receiver output merge module 904 at multipath and carry out the multipath merging.This structure had both been used the Rake reception technique of time diversity merging, had realized utilizing the intelligent antenna technology of signal space characteristic again, can reach good receptivity.

Figure 10 is the error convergence curves of apparatus of the present invention in the WCDMA system work process.Wherein abscissa is that weights are adjusted number of times, per 256 chip adjustment once, a time slot is adjusted 10 times.(a) (b) (c) convergence factor in (d) is respectively 0.1,0.2,1,2.As seen, it is lower that convergence factor is provided with area requirement, in the larger context, and can operate as normal.Under situation about having, only need 3 adjustment just to reach convergence state.

Figure 11 is the beam shape in apparatus of the present invention course of work.When initial is the circular beam of omnidirectional.Desired signal is in 60 degree directions, and convergence factor is 0.1, the situation of corresponding Figure 10 (a).By becoming the beam shape of Figure 11 (a) after three weights adjustment,, become the shape shown in Figure 11 (c) after adjusting by 50 times by becoming the shape of Figure 11 (b) after 10 adjustment.As seen adjusted for 10 times very near convergence state.If convergence factor gets 0.2,1 or 2, promptly corresponding Figure 10 (b) (c), (d), then can be restrained effect faster.

Claims

1. outer loop power control method in CDMA system, this device comprises:

Aerial array, radio-frequency channel group, descrambling module, Q road despreading integration module, I road despreading integration module,

Described antenna array is shown two or more bays, and the output of these antenna array element is received the input of radio-frequency channel group;

Described radio-frequency channel group has two or more radio-frequency channels, the corresponding bay in each radio-frequency channel, and the output of a bay of each radio-frequency channel input termination, the output of all radio-frequency channels is received the input of descrambling module;

The input signal of described descrambling module is the output signal of described radio-frequency channel group, and the result outputs to I road despreading integration module and Q road despreading integration module, and described descrambling module is finished the descrambling process;

The input signal of described Q road despreading integration module is each road output signal of described descrambling module, and the result outputs to Q road wave beam forming module and right value update module, and described Q road despreading integration module is finished the despreading integration of Q road signal;

The input signal of described I road despreading integration module is each road output signal of described descrambling module, and the result outputs to I road wave beam forming module, and described I road despreading integration module is finished the despreading integration on I road;

It is characterized in that this device further comprises:

Q road wave beam forming module, I road wave beam forming module, right value update module,

The input signal of described Q road wave beam forming module is the output signal of described Q road despreading integration module and the weights output signal of described right value update module, and described Q road wave beam forming module is finished the function of complex weighted summation;

The input signal of described I road wave beam forming module is the output signal of described I road despreading integration module and the weights output signal of described right value update module, and described I road wave beam forming module is finished the function of complex weighted summation;

The input signal of described right value update module comprises the output complex signal DQ and the frequency pilot sign of described Q road despreading integration module output signal, described Q road wave beam forming module, and the result outputs to described Q road wave beam forming module and described I road wave beam forming module; Described right value update module is finished the function of right value update.

2. outer loop power control method in CDMA system as claimed in claim 1 is characterized in that, described right value update module comprises:

Convergence factor register, judging module, selection module, amplitude adjusting module, subtracter, 2 real multipliers, complex multiplier group, weights adjusting module, weights registers group,

Described convergence factor register is deposited the convergence factor numerical value that sets in advance, and uses for described real multipliers;

Described judging module is carried out symbol judgement to the imaginary part DQ.i of input data DQ, and the result outputs to described selection module;

The input data of described selection module are the dateout of frequency pilot sign and described judging module, and described selection module selects data to output to described amplitude adjusting module;

The input data of described amplitude adjusting module are the dateout of described selection module, and result data outputs to subtracter;

The input data of described subtracter are the dateouts of DQ.i and described amplitude adjusting module, and the result outputs to described real multipliers;

In the described real multipliers one multiplies each other the data of described subtracter output and the convergence factor numerical value in the described convergence factor register, convergence factor numerical value in the real part DQ.r of another DQ in the described real multipliers and the described convergence factor register multiplies each other, and DQE.r as a result that described two real multipliers obtain and DQE.i send into described complex multiplier group as real part and the imaginary part of a plural DQE;

The input data of described complex multiplier group are the dateout of described Q road despreading integrator and the complex data DQE of two real multipliers outputs, and described complex multiplier is finished the function of complex multiplication, and the result outputs to described weights adjusting module;

The input signal of described weights adjusting module is from the current complex-valued weights vector of described weights registers group extraction and the output result of described complex multiplier group, described weights adjusting module is finished the function of right value update, and the result is input to described weights registers group;

The real part of described weights register set stores weighted vector and imaginary part output to described I road wave beam forming module and described Q road wave beam forming module for the described value adjusting module extraction of power with after upgrading.

3. outer loop power control method in CDMA system as claimed in claim 1 is characterized in that, described right value update module comprises:

Convergence factor register, amplitude adjusting module, subtracter, 2 real multipliers, complex multiplier group, weights adjusting module, weights registers group,

The input data of described amplitude adjusting module are frequency pilot sign, and result data outputs to subtracter;

The real part of described weights register set stores weighted vector and imaginary part output to described I road wave beam forming module and described Q road wave beam forming module for described weights adjusting module extraction with after upgrading.

4. outer loop power control method in CDMA system as claimed in claim 1 is characterized in that, described right value update module comprises:

Convergence factor register, judging module, amplitude adjusting module, subtracter, 2 real multipliers, complex multiplier group, weights adjusting module, weights registers group,

Described judging module is carried out symbol judgement to the imaginary part DQ.i of input data DQ, and the result outputs to described amplitude adjusting module;

The input data of described amplitude adjusting module are the dateout of described judging module, and result data outputs to subtracter;

5. outer loop power control method in CDMA system as claimed in claim 1 is characterized in that, this receiving system also comprises:

Channel estimation module, Q road signal compensation module, I path channels compensating module,

Described channel estimation module outputs to described Q path channels compensating module and described I path channels compensating module to finish the function of channel estimating with the result of channel estimating;

The input signal of described Q path channels compensating module is the real data DRQ that obtains behind the output result of DQ and described channel estimation module and the channel compensation, and the result outputs to follow-up processing module and described right value update module;

The input signal of described I path channels compensating module is the output result of DI and described channel estimation module, and the real data DRI that obtains behind the channel compensation outputs to follow-up processing module.

6. outer loop power control method in CDMA system as claimed in claim 5 is characterized in that, this receiving system also comprises:

The input signal of described Q road wave beam forming module is the output signal of described Q road despreading integration module and the weights output signal of described right value update module, dateout DQ outputs to described right value update module, described channel estimation module and described Q path channels compensating module, and described Q road wave beam forming module is finished the function of complex weighted summation;

The input signal of described right value update module comprises the output signal of described Q road despreading integration module, output complex signal DQ, frequency pilot sign and the described Q path channels compensation result DRQ of Q road wave beam forming module, and described right value update module is finished the complex-valued weights renewal and the result is outputed to described Q road wave beam forming module and described I road wave beam forming module.

7. outer loop power control method in CDMA system as claimed in claim 5 is characterized in that, described right value update module also comprises:

Described judging module is carried out symbol judgement to input data DRQ, and the result outputs to described selection module;

8. outer loop power control method in CDMA system as claimed in claim 5 is characterized in that, described right value update module also comprises:

9. outer loop power control method in CDMA system as claimed in claim 5 is characterized in that, described right value update module also comprises:

Described judging module is carried out symbol judgement to input data DRQ, and the result outputs to described amplitude adjusting module;