CN100342664C - CDMA up special physical information channel multi-user receiving apparatus - Google Patents

CDMA up special physical information channel multi-user receiving apparatus Download PDF

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CN100342664C
CN100342664C CNB2004100465096A CN200410046509A CN100342664C CN 100342664 C CN100342664 C CN 100342664C CN B2004100465096 A CNB2004100465096 A CN B2004100465096A CN 200410046509 A CN200410046509 A CN 200410046509A CN 100342664 C CN100342664 C CN 100342664C
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dpcch
result
user
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CN1707967A (en
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魏立梅
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71075—Parallel interference cancellation

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Abstract

The present invention provides a multi-user receiving apparatus of the Up Dedicated Physical Channel in the CDMA system. A multi-beam double-layer weighting parallel interference eliminating method is used for the Up Dedicated Physical Channel under the high speed data service; a smart antennas technology, a high speed data package access technology and a multi-user detection technology are combined into integration to form the multi-user receiving apparatus for the Up Dedicated Physical Channel in the CDMA system. The apparatus which is provided by the present invention can largely improve the up volume, coverage and performance of the CDMA system.

Description

A kind of code division multiple access uplink special physical channel multi-user receiving system
Technical field
The present invention relates to wireless communication technology field, particularly a kind of code division multiple access (CDMA) uplink special physical channel multi-user receiving system.
Background technology
Cdma system has become the developing direction of 3G (Third Generation) Moblie because of advantages such as its high power capacity, high quality-of-service, good confidentiality.Cdma system relies on condition code to distinguish the user, and will cause two problems in mobile communication environment is that multipath disturbs and multiple access disturbs (MAI).The invention of Rake (RAKE) reception technique makes single receiver user can utilize multipath component to produce the rake gain, and MAI has limited the raising of cdma system capacity, covering and performance.Single receiver user can't be eliminated the influence that MAI detects subscriber signal, and the detection performance of receiver will reduce under number of users increase and near-far interference situation.
Multiuser detection is the influence that overcomes MAI, improves a kind of Enhanced Technology of cdma system up-link capacity.It can make full use of a plurality of users' information, and a plurality of subscriber signals are carried out joint-detection, thereby reduces MAI as much as possible to the receiver Effect on Performance, and improves the capacity of system.Parallel Interference Cancellation method in the multiuser detection is that the signal with desired user is considered as useful signal, and other users' signal is considered as interference signal; Eliminate every other user's signal interference concurrently for each user from received signal, obtain the signal of desired user, the signal to desired user detects then, thereby improves the performance of system.In the parallel interference cancellation method, double-weighing parallel interference cancellation method can improve the performance of traditional parallel interference cancellation method greatly.This method adopts the soft decision method based on bayesian criterion on the one hand, makes the judgement cost minimum of each symbol of user; Adopt the part interference cancellation on the other hand, remedy the deviation of on the statistical significance subscriber signal being estimated.
Intelligent antenna technology also is a kind of Enhanced Technology that improves cdma system capacity and performance.It forms space filtering by wave beam, thereby reduces the influence that MAI receives subscriber signal.Intelligent antenna technology generally adopts in base station (BS), can improve the capacity and the performance of cdma system uplink and downlink simultaneously.
It is a kind of Enhanced Technology that improves the cdma system downlink capacity that high speed packet inserts (HSDPA) technology.For example, in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, HSDPA sends high speed packet to subscriber equipment (UE) by high speed descending sharing channel (HS-DSCH), and realizes the coordination that the HSDPA downlink data sends and receives by downlink high-speed shared control channel (HS-SCCH) between BS and UE.Under high-speed data service, the uplink special physical channel of distributing to the user also comprises High-Speed Dedicated Physical Control Channel (HS-DPCCH) except comprising Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH).The HS-DPCCH channel carries the feedback information of UE under the high-speed data service specially, promptly confirm/does not confirm (ACK/NACK) information and channel quality indication (CQI) information.UE receives after the packet, and packet is deciphered, and sends ACK/NACK information and CQI information according to decode results and down channel quality test result by up HS-DPCCH channel.When packet is deciphered when correct, UE sends ACK information to BS, makes BS then send next packet.If packet decoding error, UE send nack message to this BS, make BS retransmit this packet.Channel quality information CQI bit, the CQI bit sends to BS after encoding, and BS obtains the CQI bit by decoding, and carries out adaptive modulation and coding (AMC) control with the CQI bit, adjusts the code modulation mode of descending HS-DSCH.When CQI showed that down channel quality is better, BS can adopt the respective coding modulation system to increase data transmission rate, otherwise then reduced data transmission rate by the change code modulation mode.After BS has sent packet to UE, can receive the ACK/NACK information and the CQI information of this UE feedback at corresponding ascending time slot according to the certain time sequence relation.
In sum, multiuser detection utilizes the regeneration and the interference cancellation of subscriber signal, can improve up-link capacity; Intelligent antenna technology carries out separated by spaces by wave beam to all subscriber signals, the subscriber signal of arrival bearing in some wave beams strengthened to some extent, and the subscriber signal in this wave beam is not subjected to suppressing very doughtily, thereby makes the detection of subscriber signal in each wave beam become easy; The HSDPA technology then can improve the downlink capacity of cdma system by technology such as adaptive coding and modulating, re-transmissions.Yet, no matter be multiuser detection, or intelligent antenna technology and HSDPA technology, all very limited to the raising of the up capacity of cdma system, covering and performance, can not improve the up capacity of cdma system, covering and performance well.
Summary of the invention
In view of this, main purpose of the present invention is the multi-user's receiving system that proposes a kind of CDMA uplink special physical channel, to improve up capacity, covering and the performance of cdma system.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of CDMA uplink special physical channel multi-user receiving system, described device comprises:
First order parallel interference cancellation PIC structure, constitute by K first order PIC structure user signal processing unit and a first order PIC structure interference cancellation unit, wherein K is user's a number, the corresponding first order PIC structure user signal processing unit of each user, the input of described first order PIC structure is made up of whole beam signals and all K user's multidiameter delay information, whole beam signals and be advanced into K user's first order PIC structure user signal processing unit wherein, and each user's multidiameter delay information enters the first order PIC structure user signal processing unit of relative users respectively, K first order PIC structure user signal processing unit carries out multi path despreading to the beam signal of importing, obtain and export each user's power control instruction according to the multi path despreading result, beam signal and multidiameter delay information acquisition channel soft-decision weighted results and channel judging weighted results according to input, according to described channel soft-decision weighted results, channel judging weighted results and the symbol level regenerated signal that obtains and export each user according to the channel estimation results that the multi path despreading result obtains, the feedback information of chip-level regenerated signal and High-Speed Dedicated Physical Control Channel HS-DPCCH, wherein all K user's power control instruction feeds back to the transmitting terminal of relative users respectively through down link, all beam signal and all users' chip-level regenerated signal enters first order PIC structure interference cancellation unit, sue for peace and Filtering Processing to the chip-level regenerated signal of input in first order PIC structure interference cancellation unit, from each beam signal of input, deduct the filtered result of this beam signal, obtain the residual signals output of whole wave beams, the feedback information of HS-DPCCH enters the down channel processing unit; The residual signals of symbol level regenerated signal and whole wave beams enters next stage PIC structure;
Afterbody PIC structure, comprise K afterbody PIC structure user signal processing unit, the corresponding afterbody PIC structure user signal processing unit of each user, the input of described afterbody PIC structure is by all K user's multidiameter delay information, and the residual signals of whole wave beams of upper level PIC structure treatment output and all K user's symbol level regenerated signal is formed, whole wave beam residual signals of upper level PIC structure treatment output and be advanced into described K afterbody PIC structure user signal processing unit wherein, and all K user's of each user's multidiameter delay information and the output of upper level PIC structure treatment symbol level regenerated signal enters the afterbody PIC structure user signal processing unit of relative users respectively, afterbody PIC structure user signal processing unit is according to the multidiameter delay information of input, all the residual signals and the symbol level regenerated signal of wave beam carry out multi path despreading, symbol correction and write to modulation and RAKE merge, and then obtain the information bit of DPDCH channel transmission by decoding and hard decision.
Described multi-user's receiving system further comprises the intergrade PIC structure that is no less than one-level, described intergrade PIC structure is between first order PIC structure and afterbody PIC structure, described intergrade PIC structure comprises K intergrade PIC structure user signal processing unit and an intergrade PIC structure interference cancellation unit, the corresponding intergrade PIC structure user signal processing unit of each user, the input of described intergrade PIC structure is by all K user's multidiameter delay information, the residual signals of whole wave beams of upper level PIC output that structure is handled and all K user's symbol level regenerated signal are formed, the residual signals of whole wave beams of upper level PIC output that structure is handled and be advanced into a described K user's intergrade PIC structure user signal processing unit wherein, and all K user's of all K user's multidiameter delay information and the output of upper level PIC structure treatment symbol level regenerated signal enters the intergrade PIC structure user signal processing unit of relative users respectively, K intergrade PIC structure user signal processing unit exported each user's symbol level regenerated signal and chip-level regenerated signal through respective handling, wherein whole beam signals and all users' chip-level regenerated signal enters described intergrade PIC structure interference cancellation unit and handles, the output residual signals, the residual signals of symbol level regenerated signal and whole wave beams enters next stage PIC structure.
The structure of the subscriber signal processing unit of all K in the described first order PIC structure is identical, and described subscriber signal processing unit comprises:
Special used for physical control channel DPCCH despread unit, described DPCCH despread unit are according to the spreading code of DPCCH channel, and the multidiameter delay information of input, and the beam signal of importing is carried out multi path despreading, and output multi path despreading result;
Channel estimating unit obtains the channel estimation results in each footpath by each footpath despreading result of the DPCCH channel of input, and with its output;
Power control unit obtains power control instruction by each footpath despreading result of the DPCCH channel of input, and with its output as described first order PIC structure, feeds back to user's transmitting terminal;
The noise power estimation unit obtains the estimated result of the noise power of DPCCH channel in associated beam by each footpath despreading result of the DPCCH channel of input, and with its output;
The RAKE merge cells of DPCCH channel is used in conjunction with the channel estimation results and the noise power estimated result of input the DPCCH despreading result who imports being write to modulate and the RAKE merging, and amalgamation result is exported;
Transformat combination indication TFCI decoding unit is used for the RAKE amalgamation result of the DPCCH channel of input is carried out TFCI decoding, obtains the spreading factor of DPDCH channel, and with its output;
Dedicated Physical Data Channel DPDCH despread unit, described DPDCH despread unit is carried out multi path despreading according to the multidiameter delay information of input and the spreading factor of the DPDCH channel after TFCI decoding to the beam signal of importing, and output multi path despreading result;
The RAKE merge cells of DPDCH channel is used in conjunction with the channel estimation results and the noise power estimated result of input the DPDCH despreading result who imports being write to modulate and the RAKE merging, and amalgamation result is exported;
DPDCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPDCH by the estimated result of the RAKE amalgamation result of DPDCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
DPCCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPCCH by the estimated result of the RAKE amalgamation result of DPCCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
High-Speed Dedicated Physical Control Channel HS-DPCCH despread unit, described HS-DPCCH despread unit are carried out multi path despreading according to the multidiameter delay information of input and the spreading code of HS-DPCCH channel to the beam signal of importing, and output multi path despreading result;
The RAKE merge cells of HS-DPCCH channel is used in conjunction with the channel estimation results and the noise power estimated result of input the HS-DPCCH despreading result who imports being write to modulate and the RAKE merging, and amalgamation result is exported;
HS-DPCCH hard decision unit, be used for the RAKE amalgamation result of HS-DPCCH channel is carried out hard decision, the court verdict of the ACK/NACK bit that obtains sending and the decode results of CQI information, and export the court verdict of ACK/NACK bit of described transmission and the decode results of CQI information.
HS-DPCCH judgement and decision weighted unit obtain the judgement of each symbol of HS-DPCCH by the estimated result of the RAKE amalgamation result of HS-DPCCH channel and channel estimation results, noise power, carry out decision weighted its result of back output then.
The signal regeneration unit, described signal regeneration unit is by DPDCH channel soft-decision weighted results, DPCCH channel soft-decision weighted results, the decision weighted result of HS-DPCCH channel and user's multidiameter delay information, channel estimation results obtains user's DPDCH channel symbol level regenerated signal, DPCCH channel symbol level regenerated signal, HS-DPCCH channel symbol level regenerated signal and this user's chip-level regenerated signal, and the chip-level regenerated signal sent into interference cancellation unit in the described first order PIC structure, the symbol level regenerated signal is given the subscriber signal processing unit of same user in the next stage PIC structure.
The structure of all K subscriber signal processing units in the described afterbody PIC structure is identical, and the subscriber signal processing unit of described afterbody PIC structure comprises:
DPDCH despread unit, described DPDCH despread unit are carried out multi path despreading according to the multidiameter delay information of input and the spreading factor of DPDCH channel to the residual signals of importing, and output multi path despreading result;
DPCCH despread unit, described DPCCH despread unit are according to the spreading code of DPCCH channel, and the multidiameter delay information of input, and the residual signals of importing is carried out multi path despreading, and output multi path despreading result;
Two symbol amending units, be used for respectively the despreading result of the DPDCH channel of input and the despreading result of DPCCH channel being carried out the symbol correction, and respectively the symbol correction result exported in conjunction with user's the DPDCH channel of input and DPCCH channel symbol level regenerated signal;
Channel estimating unit obtains the channel estimation results in each footpath by the symbol correction result in each footpath of the DPCCH channel of input, and with its output;
The RAKE merge cells of DPDCH channel and the RAKE merge cells of DPCCH channel, be used in conjunction with the channel estimation results of input and noise power estimated result respectively to the symbol correction result of the symbol correction result of DPDCH channel of input and DPCCH channel write to modulation and RAKE merging, and respectively the result exported;
The channel decoding unit is used for the RAKE amalgamation result of DPDCH channel to input and carries out channel-decoding and obtain the information bit that the DPDCH channel sends;
The hard decision unit is used for the RAKE amalgamation result of DPCCH channel of input is carried out hard decision, obtains the information bit that the DPCCH channel sends.
Described first order PIC structure interference cancellation unit is identical with intergrade PIC structure interference cancellation cellular construction, comprising:
Signal sum unit in the wave beam is used for the chip-level regenerated signal of each user in the same wave beam of input is sued for peace, and then summed result is exported;
Moulding and matched filtering unit are used for the summed result of each wave beam of described signal summing unit is carried out molding filtration and matched filtering, and respectively with the filtering result output of each wave beam;
Residual computations unit in the wave beam, be used for from each beam signal of whole beam signals of input, deducting the filtering result of this wave beam of described moulding and matched filtering unit exporting, obtain the residual signals of each wave beam, and with the residual signals of each wave beam in described whole wave beams as the parallel subscriber signal processing unit of giving each user in the next stage PIC structure of the output signal of PIC at the corresponding levels.
The structure of the subscriber signal processing unit of all K in the described intergrade PIC structure intergrade PIC structures is identical, and the subscriber signal processing unit of described intergrade PIC structure comprises:
DPDCH despread unit, described DPDCH despread unit are carried out multi path despreading according to the multidiameter delay information of input and the spreading factor of DPDCH channel to the residual signals of importing, and output multi path despreading result;
DPCCH despread unit, described DPCCH despread unit are according to the spreading code of DPCCH channel, and the multidiameter delay information of input, and the residual signals of importing is carried out multi path despreading, and output multi path despreading result;
HS-DPCCH despread unit, described HS-DPCCH despread unit are according to the spreading code of HS-DPCCH channel, and the multidiameter delay information of input, and the residual signals of importing is carried out multi path despreading, and output multi path despreading result;
Three symbol amending units, be used for respectively respectively DPDCH despreading result, DPCCH despreading result and the HS-DPCCH despreading result of input being carried out the symbol correction, and respectively the symbol correction result exported in conjunction with the symbol level regenerated signal of the user's of input DPDCH channel, DPCCH channel and HS-DPCCH channel;
Channel estimating unit obtains the channel estimation results in each footpath by the symbol correction result in each footpath of the DPCCH channel of input, and with its output;
The RAKE merge cells of the RAKE merge cells of DPDCH channel, the RAKE merge cells of DPCCH channel and HS-DPCCH channel, be used for respectively write to modulation and RAKE of the symbol correction result of the symbol correction result of symbol correction result, the DPCCH channel of the DPDCH channel of input and HS-DPCCH channel being merged, and respectively the result exported in conjunction with the channel estimation results of input and noise power estimated result;
DPDCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPDCH by the estimated result of the RAKE amalgamation result of DPDCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
DPCCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPCCH by the estimated result of the RAKE amalgamation result of DPCCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
HS-DPCCH judgement and decision weighted unit obtain the judgement of each symbol of HS-DPCCH by the estimated result of the RAKE amalgamation result of HS-DPCCH channel and channel estimation results, noise power, then court verdict are weighted its result of back output;
The signal regeneration unit, described signal regeneration unit is by DPDCH channel soft-decision weighted results, DPCCH channel soft-decision weighted results, HS-DPCCH channel judging weighted results and user's multidiameter delay information, symbol level regenerated signal and the chip-level regenerated signal that channel estimation results obtains the user, and the chip-level regenerated signal sent into interference cancellation unit in the PIC structure at the corresponding levels, the symbol level regenerated signal is given the subscriber signal processing unit of same user in the one-level PIC structure of described back.
The subscriber signal processing unit of described intergrade PIC structure further comprises the noise power estimation unit, described noise power estimation unit obtains the estimated result of the noise power of DPCCH channel in the associated beam by the symbol correction result in each footpath of the DPCCH channel of input, and with its output.
Described afterbody PIC structure further comprises the spreading factor computing unit, is used to calculate the spreading factor of DPDCH channel at the corresponding levels.
Described intergrade PIC structure further comprises the spreading factor computing unit, is used to calculate the spreading factor of DPDCH channel at the corresponding levels.
Described spreading factor computing unit comprises the TFCI decoding unit, is used for the RAKE amalgamation result of DPCCH channel of input is carried out the spreading factor that TFCI decoding obtains the DPDCH channel, and the spreading factor of DPDCH channel is delivered to the DPDCH despread unit.
From above technical scheme as can be seen, among the present invention double-weighing parallel interference cancellation method under the multi-beam is applied to the uplink special physical channel under the high-speed data service, by intelligent antenna technology, HSDPA technology and multiuser detection being merged multi-user's receiving system of having realized a kind of CDMA uplink special physical channel.This device can obtain the gain of antenna system and the gain of Multiuser Detection simultaneously.Up, at first by intelligent antenna technology many bays signal of importing being carried out wave beam forms, all subscriber signals are carried out separated by spaces, the interference of subscriber signal in other wave beams that the subscriber signal in each wave beam is subjected in forming, wave beam is suppressed, in each wave beam, carry out Multiuser Detection then, further suppress the interference of the multiple access between the different user in the same wave beam, therefore improved up-link capacity and signal detection performance significantly.Therefore the present invention has greatly improved up capacity, covering and the performance of cdma system.
Description of drawings
Fig. 1 is a double-weighing parallel interference cancellation method flow schematic diagram under the multi-beam.
Fig. 2 is a CDMA uplink special physical channel multi-user receiving system schematic diagram of the present invention.
Fig. 3 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system first order PIC structure user signal processing unit schematic diagram.
Fig. 4 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system first order PIC structure interference cancellation processing unit schematic diagram.
Fig. 5 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system intergrade PIC structure user signal processing unit schematic diagram.
Fig. 6 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system intergrade PIC structure spreading factor computing unit schematic diagram.
Fig. 7 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system afterbody PIC structure user signal processing unit schematic diagram.
Fig. 8 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system afterbody PIC structure spreading factor computing unit schematic diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
With multiuser detection and the intelligent antenna technology double-weighing parallel interference cancellation method under the multi-beam that to obtain that combines.
Fig. 1 is the schematic flow sheet of double-weighing parallel interference cancellation method under the multi-beam.As shown in Figure 1, comprise the steps:
Step 101: reception antenna array element signal, antenna system has several array element, and wherein the bay signal is the multipath fading signal that bay receives;
Step 102: form each user's several wave beam signals according to the bay signal that receives, the number of several wave beam signals is determined according to the distribution situation of multipath in the bay signal that receives;
Step 103: the several wave beam signals of searching for each user obtains each user's multidiameter delay information, and each user's multidiameter delay information comprises the time-delay in each footpath of this user and the wave beam number at place, footpath;
Step 104: each user's single beam signal and each user's multidiameter delay information are carried out the processing of first order parallel interference cancellation, obtain the new beam signal of each user's the first order, comprising according to whole beam signals each user's single beam signal and each user's multidiameter delay information being carried out estimation and the interference cancellation that multiple access disturbs, wherein all beam signals are made up of all different beam signals in each user's the single beam signal;
Step 105: the new beam signal of each user's of obtaining the first order and each user's multidiameter delay information is carried out second level parallel interference cancellation handle, obtain each user's partial new beam signal, the process that the described parallel interference cancellation in the second level is handled is identical with the first order;
Step 106: each user's of obtaining partial new beam signal and each user's multidiameter delay information is carried out the afterbody parallel interference cancellation handle, obtain each user's soft output signal, the afterbody parallel interference cancellation is handled and is comprised: the multidiameter delay information that RAKE receiver obtains according to Multipath searching, user's beam signal to input carries out the despreading descrambling, obtains the despreading descrambling result in each footpath; Despreading descrambling result to each footpath carries out channel estimating then, obtains the channel estimation results in each footpath; At last, by each footpath despreading descrambling result and channel estimation results carry out that multipath in the wave beam merges and wave beam between multipath merge, obtain the total multipath amalgamation result of user, this multipath amalgamation result is user's soft output signal;
Step 107: the user's that decoding obtains soft output signal obtains the bit sequence that each user sends respectively.
In above process, each user's single beam signal and each user's multidiameter delay information are carried out having adopted when parallel interference cancellation is handled three grades of parallel interference cancellation structures, according to needs such as system's actual capacity, covering and performances, can adopt some grades of parallel interference cancellation structures.
Double-weighing parallel interference cancellation method under the multi-beam is applied to multi-user's receiving system that uplink special physical channel under the high-speed data service can obtain CDMA uplink special physical channel that intelligent antenna technology, HSDPA technology and multiuser detection are merged.
Fig. 2 is the uplink special physical channel multi-user receiving system schematic diagram of one embodiment of the invention.As shown in Figure 2, this device is made up of first order PIC structure 201, middle PIC structures 202 at different levels and afterbody PIC structure 203.Entering wave beam through all bay signals of separating the mediation matched filtering forms and Multipath searching unit 200, form each user's several wave beam signals and each user's multidiameter delay information, wherein the number of each user's beam signal is determined by the distribution situation of multipath in this user's multipath fading signal, and user's multidiameter delay information is made of the time delay in place, footpath wave beam number and footpath.Then, each user's beam signal is admitted to the subscriber signal processing unit of each user in the first order PIC structure 201.The whole beam signals that are made of unlike signal in all users' the beam signal are admitted to first order PIC structure 201 and middle PIC structure 202 at different levels, are used for the interference cancellation of first order PIC structure 201 and middle PIC structures 202 at different levels.Each user's multidiameter delay information is admitted to first order PIC structure 201, middle PIC structures 202 at different levels and afterbody PIC structure 203.Whole beam signals can be sent into first order PIC structure 201, then in first order PIC structure 201, number in whole beam signals, select the beam signal of relative users according to the wave beam in user's the Multipath searching information, and the subscriber signal processing unit of sending into this user is handled.Also can be directly whole beam signals be sent into the subscriber signal processing unit of each user in the first order PIC structure 201 by K parallel branch, wherein each user is corresponding to a subscriber signal processing unit.In each subscriber signal processing unit, number from whole beam signals, choose corresponding beam signal according to the wave beam in the multidiameter delay information of relative users, in the subscriber signal processing unit, the some beam signals that are selected are handled accordingly.
Wave beam forms with Multipath searching unit 200 to be determined by the implementation structure of intelligent antenna technology.Wherein can adopt the fixed beam generation type, in each wave beam, carry out Multipath searching then, obtain the multidiameter delay information of desired user.The wave beam that also can adopt other modes to finish each user forms and Multipath searching.
Fig. 3 is the CDMA uplink special physical channel multi-user receiving system first order PIC structure user signal processing unit schematic diagram of one embodiment of the invention.Fig. 4 is the CDMA uplink special physical channel multi-user receiving system first order PIC structure interference cancellation processing unit schematic diagram of one embodiment of the invention.First order PIC structure 201 is made of K first order PIC structure user signal processing unit 301 and a first order PIC structure interference cancellation unit 421, and each user has a first order PIC structure user signal processing unit 301.As shown in Figure 3, the beam signal that enters each user of first order PIC structure 201 enters the first order PIC structure user signal processing unit 301 of relative users with parallel mode.The multidiameter delay information that enters each user of first order PIC structure 201 also enters the first order PIC structure user signal processing unit 301 of relative users concurrently respectively.The structure of each user's first order PIC structure user signal processing unit 301 is identical, and finishes identical functions.
First order PIC structure user signal processing unit 301 obtains the feedback information of each user's power control instruction, symbol level regenerated signal, chip-level regenerated signal and HS-DPCCH by the user's of input each beam signal and this user's multidiameter delay information through a series of processing.User's power control instruction is through the UE of downlink feedback to transmitting terminal, and UE adjusts uplink transmission power according to power control instruction.User's symbol level regenerated signal is then given the subscriber signal processing unit of the same user in the next stage PIC structure.The feedback information of HS-DPCCH is fed to the down channel processing unit, is used to control the information transmission of descending HS-DSCH channel and HS-SCCH channel.
All users' chip-level regenerated signal and whole beam signal enter first order PIC structure interference cancellation unit 421, and the 421 pairs of input signals in first order PIC structure interference cancellation unit are handled the residual signals that obtains whole beam signals.All the residual signals of beam signal sends to next stage PIC structure as the output signal of first order PIC structure 201.
The processing procedure of first order PIC structure is:
Enter the beam signal of first order PIC structure user signal processing unit 301 and user's multidiameter delay information and enter DPDCH treatment channel, DPCCH treatment channel and HS-DPCCH treatment channel respectively.
DPCCH despread unit 303 is carried out multi path despreading according to the spreading code (DPCCH channel code and scrambler are long-pending) of multidiameter delay information and DPCCH channel to each beam signal of importing, each each footpath signal despreading of importing the user who comprises in beam signal is come out, and the multi path despreading result of all input beam signals is given the RAKE merge cells 309 of channel estimating unit 306, power control unit 305, noise power estimation unit 307 and DPCCH channel.
Channel estimating unit 306 obtains each channel estimating directly by the despreading result in each footpath of DPCCH, and channel estimation results is given simultaneously RAKE merge cells 308, the RAKE merge cells 309 of DPCCH channel, RAKE merge cells 310, DPDCH soft-decision and soft-decision weighting 313, DPCCH soft-decision and the soft-decision weighted units 314 of HS-DPCCH channel, the HS-DPCCH judgement and decision weighted unit 315 and signal regeneration unit 316 of DPDCH channel.
Power control unit 305 obtains power control instruction by each footpath despreading result of the DPCCH channel of input.Power control instruction feeds back to user's transmitting terminal as an output of first order PIC structure 201.
Noise power estimation unit 307 is obtained the estimation of the noise power of each wave beam DPCCH channel by the despreading result.The estimated result of each wave beam DPCCH channel noise power is given DPDCH soft-decision and soft-decision weighted units 313, DPCCH soft-decision and soft-decision weighted units 314, HS-DPCCH judgement and decision weighted unit 315, DPDCH RAKE merge cells 308, DPCCHRAKE merge cells 309 and the HS-DPCCH RAKE merge cells 310 of back simultaneously.
309 pairs of DPCCH despreadings of RAKE merge cells result of DPCCH writes to modulate and RAKE merges, and gives DPCCH soft-decision and soft-decision weighted units 314 and TFCI decoding unit 311 respectively with amalgamation result.
The RAKE amalgamation result of 311 couples of DPCCH of TFCI decoding unit carries out TFCI decoding, obtains the spreading factor of DPDCH, and gives DPDCH despread unit 302 with spreading factor.
DPDCH despread unit 302 is carried out multi path despreading to the beam signal of input, and the multi path despreading result is given the RAKE merge cells 308 of DPDCH channel according to multidiameter delay information, spreading factor.
308 pairs of DPDCH despreadings of RAKE merge cells result of DPDCH writes to modulate and RAKE merges, and gives DPDCH soft-decision and soft-decision weighted units 313 with amalgamation result.
HS-DPCCH despread unit 304 is carried out multi path despreading according to the spreading code (HS-DPCCH channel code and scrambler are long-pending) of multidiameter delay information and HS-DPCCH channel to the beam signal of importing, and the multi path despreading result is given the RAKE merge cells 310 of HS-DPCCH channel.
310 pairs of HS-DPCCH despreadings of RAKE merge cells result of HS-DPCCH writes to modulate and RAKE merges, and amalgamation result is given judgement and decision weighted unit 315 and the HS-DPCCH hard decision unit 312 of HS-DPCCH.
The RAKE amalgamation result of the 312 couples of HS-DPCCH in hard decision unit of HS-DPCCH carries out hard decision, the court verdict of the ACK/NACK bit that obtains sending and the decode results of CQI information.The court verdict of ACK/NACK bit and the decode results of CQI are fed to the down channel processing unit, are used to control the information transmission of descending HS-DSCH channel and HS-SCCH channel.
The judgement of HS-DPCCH and decision weighted unit 315 are adjudicated and weighting by RAKE amalgamation result and channel estimation results, the noise power estimated result of HS-DPCCH, and give signal regeneration unit 316 with weighted results.
DPDCH soft-decision and soft-decision weighted units 313 are carried out the soft-decision weighting then by the soft-decision that RAKE amalgamation result and channel estimation results, the noise power estimated result of DPDCH obtains each symbol.
DPCCH soft-decision and soft-decision weighted units 314 are carried out the soft-decision weighting then by the soft-decision that RAKE amalgamation result and channel estimation results, the noise power estimated result of DPCCH obtains each symbol.
The decision weighted weights of the weights of the weights of the soft-decision weighting of DPDCH channel, the weighting of DPCCH channel soft-decision and HS-DPCCH channel ACK/NACK, the weights of CQI soft-decision weighting can be got different numerical value.DPDCH channel and HS-DPCCH channel when calculating soft-decision, the noise power that at first will convert out each self-channel by the estimation of DPCCH channel noise power.
Signal regeneration unit 316 is by the decision weighted result of the soft-decision weighted results of DPDCH channel soft-decision weighted results, DPCCH channel, HS-DPCCH channel and each footpath time delay information of user, the chip-level regenerated signal that channel estimation results obtains user's DPDCH channel symbol level regenerated signal, DPCCH channel symbol level regenerated signal, HS-DPCCH channel symbol level regenerated signal and this user, and the chip-level regenerated signal is sent into interference cancellation unit 421; Three symbol level regenerated signals are given three symbol correction subelements of the subscriber signal processing unit of same user in the PIC structure of the second level respectively.
Wherein, the symbol level regenerated signal of DPDCH channel is the symbol level estimated result of the signal of DPDCH channel in the every footpath of user in each wave beam of being correlated with; The symbol level regenerated signal of DPCCH channel is the symbol level estimated result of the signal of DPCCH channel in the every footpath of user in each wave beam of being correlated with; The symbol level regenerated signal of HS-DPCCH channel is the symbol level estimated result of the signal of HS-DPCCH channel in the every footpath of user in each wave beam of being correlated with.The number of each channel symbol level regenerated signal is exactly the number sum of this user all footpath signals in all associated beam.
Wherein, the chip-level regenerated signal be in each relevant wave beam all footpath signals of user and chip-level estimate that the number of associated beam is exactly the number of chip-level regenerated signal.
Associated beam is exactly the set of the wave beam of the wave beam correspondence in each footpath in the multidiameter delay information.
Fig. 4 is one embodiment of the invention CDMA uplink special physical channel multi-user receiving system first order PIC structure interference cancellation processing unit schematic diagram.As shown in Figure 4, all users' chip-level regenerated signal enters the interior signal sum unit 422 of wave beam in the first order PIC structure interference cancellation unit 421.Interior each user's of 422 pairs of same wave beams of signal sum unit chip-level regenerated signal is sued for peace in the wave beam, then the summed result of each wave beam is given moulding and matched filtering unit 423.The summing signal of each wave beam of 423 pairs of inputs of moulding and matched filtering unit carries out molding filtration and matched filtering respectively.Formed filter is with the formed filter of the modulating part employing of up DPCH, and matched filter is exactly the matched filter that the uplink special physical channel receiving terminal adopts.The filtering result of each wave beam sends into residual computations unit 424 in the wave beam, and all beam signal also enters residual computations unit 424 in the wave beam.Residual computations unit 424 deducts the filtering result of the summing signal of this wave beam in the wave beam from certain beam signal, obtains the residual signals of this wave beam.The residual signals of each wave beam is given next stage PIC structure as the output signal of PIC at the corresponding levels is parallel.In next stage PIC structure, the wave beam that comprises in the multidiameter delay information of the subscriber signal processing unit of user i according to this user number is chosen the residual signals of corresponding wave beam from the residual signals of whole wave beams, the residual signals of several wave beams of being selected is handled accordingly again.
To first order PIC structure, the spreading factor that TFCI decoding obtains can only use for PIC structure at the corresponding levels, also can be transferred to subsequent stages PIC structure, uses for DPDCH despread unit in the follow-up PIC structure.
The structure of middle PIC at different levels is just the same, is the processing procedure of PIC structures at different levels in the middle of example illustrates below with second level PIC structure.
Second level PIC structure 202 is made of K second level subscriber signal processing unit and PIC structure interference cancellation unit, a second level.Fig. 5 is one embodiment of the invention uplink special physical channel multi-user receiving system intergrade PIC structure second level subscriber signal processing unit schematic diagram.The residual signals of each wave beam that first order PIC structure 201 obtains, each user's symbol level regenerated signal and each user's multidiameter delay information enter second level PIC structure 202.In the PIC structure of the second level, each user has a subscriber signal processing unit 501.Each user's subscriber signal processing unit 501 is finished identical function.The structure of PIC structure interference cancellation unit, the second level can be identical with the structure of first order PIC structure interference cancellation unit 421.Equally, the structure of other intergrade of other grades PIC structure interference cancellation unit also can be identical entirely with the structure of first order PIC structure interference cancellation unit 421.
As shown in Figure 5, in the second level PIC structure 202, the input signal of user's subscriber signal processing unit 501 is: the residual signals of user place wave beam, this user's symbol level regenerated signal and this user's multidiameter delay information.Wherein, the residual signals of user place wave beam is to extract from the residual signals of whole wave beams according to wave beam information in this user's the multidiameter delay information, and this leaching process can carry out at subscriber signal processing unit 501.User's subscriber signal processing unit 501 is at first given DPDCH Channel Processing passage, DPCCH Channel Processing passage and HS-DPCCH treatment channel user's multidiameter delay information and residual signals simultaneously.
DPDCH Channel Processing passage carries out the DPDCH despreading according to multidiameter delay information to residual signals, then the despreading result is carried out symbol correction, RAKE merging, carry out soft-decision and soft-decision weighting at last, and the soft-decision weighted results is sent into signal regeneration unit 516.The DPCCH treatment channel is carried out the DPCCH despreading earlier to the multipath signal of input, then the despreading result is carried out symbol correction, channel estimating, noise power estimation, RAKE merging, carry out soft-decision and soft-decision weighting at last, also the soft-decision weighted results is sent into signal regeneration unit 516.The HS-DPCCH treatment channel is also similarly handled.Signal regeneration unit 516 is obtained user's symbol level regenerated signal and chip-level regenerated signal by all input signals.The symbol level regenerated signal is fed to the subscriber signal processing unit of same user in the third level PIC structure, and the chip-level regenerated signal is admitted to PIC structure interference cancellation unit, the second level 521.In PIC structure at the corresponding levels, DPDCH despread unit 502, DPCCH despread unit 503, HS-DPCCH despread unit 505 are identical with DPDCH despread unit 302, DPCCH despread unit 303, HS-DPCCH despread unit 304 in the first order PIC structure 201 respectively; DPDCH RAKE merge cells 509, DPCCH RAKE merge cells 510 and HS-DPCCH RAKE merge cells 512 respectively with first order PIC structure 201 in DPDCH RAKE merge cells 308, DPCCH RAKE merge cells 309 identical with HS-DPCCH RAKE merge cells 310; DPDCH soft-decision and soft-decision weighted units 513, DPCCH soft-decision and soft-decision weighted units 514 and HS-DPCCH judgement and soft-decision weighted units 515 respectively with first order PIC structure 201 in the DPDCH soft-decision adjudicate identical with soft-decision weighted units 313, DPCCH soft-decision and soft-decision weighted units 314 with HS-DPCCH with soft-decision weighted units 315; Signal regeneration unit 516 is identical with signal regeneration unit 316 in the first order PIC structure 201.DPDCH channel, DPCCH and the weights of HS-DPCCH channel judging weighting as a result can be different.The weights of the weighting of DPDCH at the corresponding levels are greater than the weights of previous stage DPDCH weighting.DPCCH channel and the corresponding weights of HS-DPCCH channel also are like this.
The despreading result of the DPDCH channel of 506 pairs of inputs of symbol amending unit of DPDCH channel carries out the symbol level correction: with the despreading result in DPDCH channel footpath in certain wave beam with come from the DPDCH channel symbol level regenerated signal addition in this footpath in this wave beam of previous stage.The despreading result of the DPCCH channel of 507 pairs of inputs of symbol amending unit of DPCCH channel carries out the symbol level correction: with the despreading result in DPCCH channel footpath in certain wave beam with come from the DPCCH channel symbol level regenerated signal addition in this footpath in this wave beam of previous stage.The symbol amending unit 508 of HS-DPCCH channel also carries out similar processing.
The despread unit 502 of DPDCH need be known the spreading factor of DPDCH, and spreading factor can use the spreading factor that TFCI decoding obtains in the first order PIC structure 201, also can be obtained by the spreading factor computing unit 622 of PIC at the corresponding levels.As shown in Figure 6, the spreading factor computing unit 622 of second level PIC carries out TFCI decoding by the RAKE amalgamation result of DPCCH at the corresponding levels, obtains the spreading factor of DPDCH.Interference cancellation through previous stage PIC structure, the signal to noise ratio of the RAKE amalgamation result of DPCCH should be than the signal to noise ratio height of the RAKE amalgamation result of DPCCH in the previous stage PIC structure in the PIC structure at the corresponding levels, so the error rate of the spreading factor that TFCI decoding at the corresponding levels obtains will be littler.Therefore, adopt spreading factor computing unit 622, and the despreading that the spreading factor that uses this unit to obtain carries out DPDCH will be more favourable to user's detection in the corresponding levels.But TFCI decoding has not only increased complexity, and has increased time delay.Can determine whether as required to adopt the spreading factor computing unit in the corresponding levels.
PIC structure interference cancellation unit, the second level is finished and first order PIC structure interference cancellation unit 421 identical functions: the residual signals that is obtained whole wave beams by all users' chip-level regenerated signal and whole beam signals by interference cancellation.In next stage PIC structure, the wave beam that comprises in the multidiameter delay information of the subscriber signal processing unit of user i according to the user number is chosen the residual signals of corresponding wave beam from the residual signals of whole wave beams, the residual signals of several wave beams of being selected is handled accordingly again.
The judgement of 509,510,512 and three channels of RAKE merge cells of three channels and the noise power that decision weighted unit 513,514,515 all needs to know DPCCH channel at the corresponding levels in the PIC structure at the corresponding levels.The noise power of DPCCH channel at the corresponding levels can be provided by noise power estimation unit in the nearest one-level PIC structure, also can add a noise power estimation unit in PIC structure at the corresponding levels, this unit is carried out the estimation of the DPCCH channel noise power of each wave beam of user by the symbol correction result of DPCCH channel at the corresponding levels.
The progression of intergrade PIC structure can be adjusted as required, and wherein each intergrade PIC structure is finished identical operations.
Afterbody PIC structure 203 is made of K afterbody PIC structure user signal processing unit 701.Fig. 7 is one embodiment of the invention uplink special physical channel multi-user receiving system afterbody PIC structure user signal processing unit 701 schematic diagrames.As shown in Figure 7: being input as of afterbody PIC structure user signal processing unit 701: the residual signals of this user place wave beam that previous stage obtains and the symbol level regenerated signal of each channel of user, and user's multidiameter delay information.Wherein, the residual signals of user place wave beam is to extract from the residual signals of whole wave beams according to wave beam information in this user's the multidiameter delay information, and this leaching process can carry out at the subscriber signal processing unit.Afterbody PIC structure user signal processing unit 701 is at first sent the residual signals of the wave beam of multidiameter delay information and input into DPDCH treatment channel and DPCCH treatment channel respectively.The DPDCH treatment channel is carried out the DPDCH despreading according to multidiameter delay information to the residual signals of each wave beam, then to the despreading result carry out the symbol correction, RAKE merges.Amalgamation result is admitted to the channel decoding unit of DPDCH channel, and channel decoding obtains the information bit that the DPDCH channel sends.The DPCCH treatment channel is carried out the DPCCH despreading according to multidiameter delay information to the residual signals of each wave beam, then the despreading result is carried out symbol correction, channel estimating, carries out RAKE at last and merges.The RAKE amalgamation result is fed to the hard decision unit of DPCCH channel.The hard decision unit carries out hard decision to input signal, obtains the information bit that the DPCCH channel sends.
DPDCH despread unit 702 at the corresponding levels need be known the spreading factor of DPDCH, and spreading factor can use the spreading factor that TFCI decoding obtains in the nearest one-level PIC structure, also can be obtained by the spreading factor computing unit 822 of PIC structure at the corresponding levels.As shown in Figure 8, the structure of the spreading factor computing unit 822 of PIC at the corresponding levels can be identical with the spreading factor computing unit 622 of second level PIC structure.
The RAKE merge cells of DPDCH channel and DPCCH channel need be known the noise power of DPCCH channel at the corresponding levels in the PIC structure at the corresponding levels.The noise power of DPCCH channel at the corresponding levels can be provided by the noise power estimation unit in the nearest one-level PIC structure, also can add a noise power estimation unit in PIC structure at the corresponding levels, this noise power estimation unit is carried out the estimation of the DPCCH channel noise power of each wave beam of user by the symbol correction result of DPCCH channel at the corresponding levels.
Because the particularity of HS-DPCCH channel, the processing of using HS-DPCCH channel in multi-user's receiving system of uplink special physical channel of the present invention is specific as follows:
If it is ACKNACK_N_TRANSMIT that ACK/NACK repeats to send number of times; The report cycle of CQI information is K_REPORT_CYCLE, and reporting side-play amount is L_OFFSET; It is CQI_N_TRANSMIT that CQI information repeats to send number of times.Parameters such as above ACKNACK_N_TRANSMIT, K_REPORT_CYCLE, L_OFFSET, CQI_N_TRANSMIT offer UE by NODEB by downlink signaling.When UE did not have feedback information, the HS-DPCCH channel was designated as DTX with regard to no signal and incite somebody to action the information that this moment, HS-DPCCH sent at the BS receiving terminal, and the DTX value is 0.
Do not have the time slot of UE feedback information at the HS-DPCCH channel, to the HS-DPCCH channel can not carry out despreading, RAKE merges and processing such as hard decision.The despread unit of HS-DPCCH, RAKE merge cells, hard decision unit do not carry out any processing, do not produce any output yet.The judgement of HS-DPCCH and decision weighted unit use DTX to send symbol as each of no signal time slot, and give the signal regeneration unit with each DTX symbol, that is: at the frame of HS-DPCCH signal no signal, the HS-DPCCH channel is not participated in signal regeneration.
At the HS-DPCCH channel time slot of UE feedback information is arranged, the HS-DPCCH despread unit is carried out despreading to this time slot; The RAKE merge cells of HS-DPCCH carries out the RAKE merging to the despreading result of this time slot; The hard decision unit of HS-DPCCH carries out hard decision to this time slot, and court verdict is fed back to the down channel processing unit, is used for the control of descending transmission.Adjudicate with decision weighted the RAKE amalgamation result of this time slot the judgement of HS-DPCCH and decision weighted unit, and give the signal regeneration unit with decision weighted result, is used for the signal regeneration of HS-DPCCH channel.
Following function is specifically finished in HS-DPCCH hard decision unit:
(1) to continuous ACKNACK_N_TRANSMIT HS-DPCCH frame of loading ACK/nack message, the RAKE amalgamation result of each symbol of first time slot of every frame is added up, carry out the ternary judgement of ACK/NACK/DTX by accumulation result, court verdict is exactly the affirmation information symbol that UE sends.The ternary judgement of ACK/NACK/DTX has concrete decision method, repeats no more here.This symbol can only be a value among the ACK/NACK/DTX.And this value is given to the down channel processing unit, carry out the control that the HSDPA packet sends;
(2) to continuous CQI_N_TRANSMIT the cycle of carrying CQI information, take out L_OFFSET the HS-DPCCH frame in each cycle; From every frame, take out second and the 3rd time slot, obtain CQI_N_TRANSMIT the second and the 3rd time slot so altogether.The RAKE amalgamation result of COI_N_TRANSMIT symbol of each time slot same position is added up, obtain the accumulation result of two time slots.Accumulation result by these two time slots is adjudicated, and determines whether the information of these two time slots is effective informations, if not effective information, just gives the down channel processing unit five DTX as the CQI bit that these two time slots send; If effective information, just the accumulation result by these two time slots carries out CQI decoding, obtains 5 CQI bits.These 5 CQI bits are given the down channel processing unit, carry out the control that the HSDPA packet sends.The validity judge of CQI information and the decoding of CQI all have concrete method, repeat no more here.
The HS-DPCCH judgement is finished following function with decision weighted unit:
(1) to each HS-DPCCH frame of loading ACK/nack message, the RAKE of each symbol of first time slot of every frame merged add up, and accumulation result is carried out the ACK/NACK/DTX three-state adjudicate, then court verdict is weighted, and with the estimated value of weighted results, and give the signal regeneration unit with the estimated value of each symbol as this each symbol of time slot.
(2) to carrying each HS-DPCCH frame of CQI information, from every frame, take out second and the 3rd time slot, RAKE amalgamation result to each symbol in these two time slots is adjudicated, determine whether this symbol is effective information, if not effective information, just the estimated value of DTX, and give the signal regeneration unit as this symbol.If effective information just carries out soft-decision to this symbol, and the soft-decision result of each symbol is weighted.Give the signal regeneration unit weighted results of each symbol.
(3) weights of the weights of first time slot weighting and second, third time slot weighting can be different.And weights are in interval [0,1] interior value.
Among the above embodiment, the PIC structure progression of uplink special physical channel multi-user receiving system can be determined as required, can only adopt the first order and afterbody PIC structure, and the PIC structure in the middle of saving also can adopt more multistage PIC structure.
In the above process, with the WCDMA system is that example describes the present invention, and application in fact of the present invention is not limited to the WCDMA system, and all right application invention is in similar CDMA Channel structure such as CDMA 2000 (CDMA2000), TD SDMA (TD-SCDMA) system.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1, a kind of code division multiple access CDMA uplink special physical channel multi-user receiving system is characterized in that described device comprises:
First order parallel interference cancellation PIC structure, constitute by K first order PIC structure user signal processing unit and a first order PIC structure interference cancellation unit, wherein K is user's a number, the corresponding first order PIC structure user signal processing unit of each user, the input of described first order PIC structure is made up of whole beam signals and all K user's multidiameter delay information, whole beam signals and be advanced into K user's first order PIC structure user signal processing unit wherein, and each user's multidiameter delay information enters the first order PIC structure user signal processing unit of relative users respectively, K first order PIC structure user signal processing unit carries out multi path despreading to the beam signal of importing, obtain and export each user's power control instruction according to the multi path despreading result, beam signal and multidiameter delay information acquisition channel soft-decision weighted results and channel judging weighted results according to input, according to described channel soft-decision weighted results, channel judging weighted results and the symbol level regenerated signal that obtains and export each user according to the channel estimation results that the multi path despreading result obtains, the feedback information of chip-level regenerated signal and High-Speed Dedicated Physical Control Channel HS-DPCCH, wherein all K user's power control instruction feeds back to the transmitting terminal of relative users respectively through down link, all beam signal and all users' chip-level regenerated signal enters first order PIC structure interference cancellation unit, sue for peace and Filtering Processing to the chip-level regenerated signal of input in first order PIC structure interference cancellation unit, from each beam signal of input, deduct the filtered result of this beam signal, obtain the residual signals output of whole wave beams, the feedback information of HS-DPCCH enters the down channel processing unit; The residual signals of symbol level regenerated signal and whole wave beams enters next stage PIC structure;
Afterbody PIC structure, comprise K afterbody PIC structure user signal processing unit, the corresponding afterbody PIC structure user signal processing unit of each user, the input of described afterbody PIC structure is by all K user's multidiameter delay information, and the residual signals of whole wave beams of upper level PIC structure treatment output and all K user's symbol level regenerated signal is formed, whole wave beam residual signals of upper level PIC structure treatment output and be advanced into described K afterbody PIC structure user signal processing unit wherein, and all K user's of each user's multidiameter delay information and the output of upper level PIC structure treatment symbol level regenerated signal enters the afterbody PIC structure user signal processing unit of relative users respectively, afterbody PIC structure user signal processing unit is according to the multidiameter delay information of input, all the residual signals and the symbol level regenerated signal of wave beam carry out multi path despreading, symbol correction and write to modulation and RAKE merge, and then obtain the information bit of DPDCH channel transmission by decoding and hard decision.
2, device according to claim 1, it is characterized in that, described multi-user's receiving system further comprises the intergrade PIC structure that is no less than one-level, described intergrade PIC structure is between first order PIC structure and afterbody PIC structure, described intergrade PIC structure comprises K intergrade PIC structure user signal processing unit and an intergrade PIC structure interference cancellation unit, the corresponding intergrade PIC structure user signal processing unit of each user, the input of described intergrade PIC structure is by all K user's multidiameter delay information, the residual signals of whole wave beams of upper level PIC output that structure is handled and all K user's symbol level regenerated signal are formed, the residual signals of whole wave beams of upper level PIC output that structure is handled and be advanced into a described K user's intergrade PIC structure user signal processing unit wherein, and all K user's of all K user's multidiameter delay information and the output of upper level PIC structure treatment symbol level regenerated signal enters the intergrade PIC structure user signal processing unit of relative users respectively, K intergrade PIC structure user signal processing unit exported each user's symbol level regenerated signal and chip-level regenerated signal through respective handling, wherein whole beam signals and all users' chip-level regenerated signal enters described intergrade PIC structure interference cancellation unit and handles, the output residual signals, the residual signals of symbol level regenerated signal and whole wave beams enters next stage PIC structure.
3, device according to claim 1 and 2 is characterized in that, the structure of the subscriber signal processing unit of all K in the described first order PIC structure is identical, and described subscriber signal processing unit comprises:
Special used for physical control channel DPCCH despread unit, described DPCCH despread unit are according to the spreading code of DPCCH channel, and the multidiameter delay information of input, and the beam signal of importing is carried out multi path despreading, and output multi path despreading result;
Channel estimating unit obtains the channel estimation results in each footpath by each footpath despreading result of the DPCCH channel of input, and with its output;
Power control unit obtains power control instruction by each footpath despreading result of the DPCCH channel of input, and with its output as described first order PIC structure, feeds back to user's transmitting terminal;
The noise power estimation unit obtains the estimated result of the noise power of DPCCH channel in associated beam by each footpath despreading result of the DPCCH channel of input, and with its output;
The RAKE merge cells of DPCCH channel is used in conjunction with the channel estimation results and the noise power estimated result of input the DPCCH despreading result who imports being write to modulate and the RAKE merging, and amalgamation result is exported;
Transformat combination indication TFCI decoding unit is used for the RAKE amalgamation result of the DPCCH channel of input is carried out TFCI decoding, obtains the spreading factor of DPDCH channel, and with its output;
Dedicated Physical Data Channel DPDCH despread unit, described DPDCH despread unit is carried out multi path despreading according to the multidiameter delay information of input and the spreading factor of the DPDCH channel after TFCI decoding to the beam signal of importing, and output multi path despreading result;
The RAKE merge cells of DPDCH channel is used in conjunction with the channel estimation results and the noise power estimated result of input the DPDCH despreading result who imports being write to modulate and the RAKE merging, and amalgamation result is exported;
DPDCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPDCH by the estimated result of the RAKE amalgamation result of DPDCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
DPCCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPCCH by the estimated result of the RAKE amalgamation result of DPCCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
High-Speed Dedicated Physical Control Channel HS-DPCCH despread unit, described HS-DPCCH despread unit are carried out multi path despreading according to the multidiameter delay information of input and the spreading code of HS-DPCCH channel to the beam signal of importing, and output multi path despreading result;
The RAKE merge cells of HS-DPCCH channel is used in conjunction with the channel estimation results and the noise power estimated result of input the HS-DPCCH despreading result who imports being write to modulate and the RAKE merging, and amalgamation result is exported;
HS-DPCCH hard decision unit, be used for the RAKE amalgamation result of HS-DPCCH channel is carried out hard decision, the court verdict of the ACK/NACK bit that obtains sending and the decode results of CQI information, and export the court verdict of ACK/NACK bit of described transmission and the decode results of CQI information;
HS-DPCCH judgement and decision weighted unit obtain the judgement of each symbol of HS-DPCCH by the estimated result of the RAKE amalgamation result of HS-DPCCH channel and channel estimation results, noise power, carry out decision weighted its result of back output then;
The signal regeneration unit, described signal regeneration unit is by DPDCH channel soft-decision weighted results, DPCCH channel soft-decision weighted results, the decision weighted result of HS-DPCCH channel and user's multidiameter delay information, channel estimation results obtains user's DPDCH channel symbol level regenerated signal, DPCCH channel symbol level regenerated signal, HS-DPCCH channel symbol level regenerated signal and this user's chip-level regenerated signal, and the chip-level regenerated signal sent into interference cancellation unit in the described first order PIC structure, the symbol level regenerated signal is given the subscriber signal processing unit of same user in the next stage PIC structure.
4, device according to claim 1 and 2 is characterized in that, the structure of all K subscriber signal processing units in the described afterbody PIC structure is identical, and the subscriber signal processing unit of described afterbody PIC structure comprises:
DPDCH despread unit, described DPDCH despread unit are carried out multi path despreading according to the multidiameter delay information of input and the spreading factor of DPDCH channel to the residual signals of importing, and output multi path despreading result;
DPCCH despread unit, described DPCCH despread unit are according to the spreading code of DPCCH channel, and the multidiameter delay information of input, and the residual signals of importing is carried out multi path despreading, and output multi path despreading result;
Two symbol amending units, be used for respectively the despreading result of the DPDCH channel of input and the despreading result of DPCCH channel being carried out the symbol correction, and respectively the symbol correction result exported in conjunction with user's the DPDCH channel of input and DPCCH channel symbol level regenerated signal;
Channel estimating unit obtains the channel estimation results in each footpath by the symbol correction result in each footpath of the DPCCH channel of input, and with its output;
The RAKE merge cells of DPDCH channel and the RAKE merge cells of DPCCH channel, be used in conjunction with the channel estimation results of input and noise power estimated result respectively to the symbol correction result of the symbol correction result of DPDCH channel of input and DPCCH channel write to modulation and RAKE merging, and respectively the result exported;
The channel decoding unit is used for the RAKE amalgamation result of DPDCH channel to input and carries out channel-decoding and obtain the information bit that the DPDCH channel sends;
The hard decision unit is used for the RAKE amalgamation result of DPCCH channel of input is carried out hard decision, obtains the information bit that the DPCCH channel sends.
5, device according to claim 2 is characterized in that, described first order PIC structure interference cancellation unit is identical with intergrade PIC structure interference cancellation cellular construction, comprising:
Signal sum unit in the wave beam is used for the chip-level regenerated signal of each user in the same wave beam of input is sued for peace, and then summed result is exported;
Moulding and matched filtering unit are used for the summed result of each wave beam of described signal summing unit is carried out molding filtration and matched filtering, and respectively with the filtering result output of each wave beam;
Residual computations unit in the wave beam, be used for from each beam signal of whole beam signals of input, deducting the filtering result of this wave beam of described moulding and matched filtering unit exporting, obtain the residual signals of each wave beam, and with the residual signals of each wave beam in described whole wave beams as the parallel subscriber signal processing unit of giving each user in the next stage PIC structure of the output signal of PIC at the corresponding levels.
6, device according to claim 2 is characterized in that, the structure of the subscriber signal processing unit of all K in the described intergrade PIC structure intergrade PIC structures is identical, and the subscriber signal processing unit of described intergrade PIC structure comprises:
DPDCH despread unit, described DPDCH despread unit are carried out multi path despreading according to the multidiameter delay information of input and the spreading factor of DPDCH channel to the residual signals of importing, and output multi path despreading result;
DPCCH despread unit, described DPCCH despread unit are according to the spreading code of DPCCH channel, and the multidiameter delay information of input, and the residual signals of importing is carried out multi path despreading, and output multi path despreading result;
HS-DPCCH despread unit, described HS-DPCCH despread unit are according to the spreading code of HS-DPCCH channel, and the multidiameter delay information of input, and the residual signals of importing is carried out multi path despreading, and output multi path despreading result;
Three symbol amending units, be used for respectively respectively DPDCH despreading result, DPCCH despreading result and the HS-DPCCH despreading result of input being carried out the symbol correction, and respectively the symbol correction result exported in conjunction with the symbol level regenerated signal of the user's of input DPDCH channel, DPCCH channel and HS-DPCCH channel;
Channel estimating unit obtains the channel estimation results in each footpath by the symbol correction result in each footpath of the DPCCH channel of input, and with its output;
The RAKE merge cells of the RAKE merge cells of DPDCH channel, the RAKE merge cells of DPCCH channel and HS-DPCCH channel, be used for respectively write to modulation and RAKE of the symbol correction result of the symbol correction result of symbol correction result, the DPCCH channel of the DPDCH channel of input and HS-DPCCH channel being merged, and respectively the result exported in conjunction with the channel estimation results of input and noise power estimated result;
DPDCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPDCH by the estimated result of the RAKE amalgamation result of DPDCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
DPCCH soft-decision and soft-decision weighted units obtain the soft-decision of each symbol of DPCCH by the estimated result of the RAKE amalgamation result of DPCCH channel and channel estimation results, noise power, carry out its result of output after the soft-decision weighting then;
HS-DPCCH judgement and decision weighted unit obtain the judgement of each symbol of HS-DPCCH by the estimated result of the RAKE amalgamation result of HS-DPCCH channel and channel estimation results, noise power, then court verdict are weighted its result of back output;
The signal regeneration unit, described signal regeneration unit is by DPDCH channel soft-decision weighted results, DPCCH channel soft-decision weighted results, HS-DPCCH channel judging weighted results and user's multidiameter delay information, symbol level regenerated signal and the chip-level regenerated signal that channel estimation results obtains the user, and the chip-level regenerated signal sent into interference cancellation unit in the PIC structure at the corresponding levels, the symbol level regenerated signal is given the subscriber signal processing unit of same user in the one-level PIC structure of described back.
7, device according to claim 6, it is characterized in that, the subscriber signal processing unit of described intergrade PIC structure further comprises the noise power estimation unit, described noise power estimation unit obtains the estimated result of the noise power of DPCCH channel in the associated beam by the symbol correction result in each footpath of the DPCCH channel of input, and with its output.
8, device according to claim 4 is characterized in that, described afterbody PIC structure further comprises the spreading factor computing unit, is used to calculate the spreading factor of DPDCH channel at the corresponding levels.
9, device according to claim 6 is characterized in that, described intergrade PIC structure further comprises the spreading factor computing unit, is used to calculate the spreading factor of DPDCH channel at the corresponding levels.
10, according to Claim 8 or 9 described devices, it is characterized in that, described spreading factor computing unit comprises the TFCI decoding unit, be used for the RAKE amalgamation result of DPCCH channel of input is carried out the spreading factor that TFCI decoding obtains the DPDCH channel, and the spreading factor of DPDCH channel is delivered to the DPDCH despread unit.
CNB2004100465096A 2004-06-08 2004-06-08 CDMA up special physical information channel multi-user receiving apparatus Expired - Fee Related CN100342664C (en)

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