CN100531440C - Baseband processing module for WCDMA radio frequency receiver and transmitter - Google Patents
Baseband processing module for WCDMA radio frequency receiver and transmitter Download PDFInfo
- Publication number
- CN100531440C CN100531440C CNB2006101090693A CN200610109069A CN100531440C CN 100531440 C CN100531440 C CN 100531440C CN B2006101090693 A CNB2006101090693 A CN B2006101090693A CN 200610109069 A CN200610109069 A CN 200610109069A CN 100531440 C CN100531440 C CN 100531440C
- Authority
- CN
- China
- Prior art keywords
- signal
- wcdma
- wcdma signal
- module
- cell search
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A baseband processing module includes TX processing components, a processor, memory, an RX interface, and a cell searcher module. The TX processing components receive outbound data, process the outbound data to produce a baseband TX signal, and output the baseband TX signal to a RF front end of the RF transceiver. The RX interface receives a baseband RX signal from the RF front end carrying a WCDMA signal. The cell searcher module receives the baseband RX signal, scans for WCDMA energy within the baseband RX signal, acquires slot synchronization to the WCDMA signal based upon correlation with a Primary Synchronization Channel (PSCH) of the WCDMA signal, acquires frame synchronization to, and identify a code group of, the WCDMA signal based upon correlation with a Secondary Synchronization Channel (SSCH) of the WCDMA signal, and identifies the scrambling code of the WCDMA signal based upon correlation with a Common Pilot Channel (CPICH) of the WCDMA signal.
Description
Technical field
The present invention relates to wireless communication system, more particularly, relate to a kind of decoding of the data that wireless terminal receives in wireless communication system.
Background technology
Cellular radio Communication system is supported the radio communication service in most of area, the world.Cellular radio Communication system is included in " network architecture " of wirelessly communicating by letter with wireless terminal in the service coverage.This network architecture generally comprises a plurality of base stations that are dispersed in the service coverage, and the radio communication of (or a group section in) is supported in its honeycomb in each base station.The base station is connected to base station controller (BSC), and each BSC serves a plurality of base stations.Each BSC is connected to mobile switching centre (MSC).Each BSC also directly or indirectly is connected to the Internet usually.
In the work, each base station and a plurality of wireless terminal communications that operate in the honeycomb/section of its service.The BSC that is connected to this base station routing voice communication between MSC and serviced base station.MSC also routing voice is communicated to another MSC or PSTN.BSC is in serviced base station and include or be connected to routing data traffic between the packet data network of the Internet.Transmission from the base station to the wireless terminal is known as " forward link " transmission, and the transmission from the wireless terminal to the base station is known as " reverse link " transmission.Data quantity transmitted generally surpasses data quantity transmitted on the reverse link on the forward link.This is that the webserver provides data to wireless terminal then because the data user generally gives an order with from data source (for example, the webserver) request msg.
Radio Link between the wireless terminal of base station and its service generally carries out work according to one or more operation standards.These operation standards have defined the mode of distribution, setting, service and releasing Radio Link.Present widely used cellular standards comprises Global Systems for Mobile communications (GSM) standard, North America code division multiple access (CDMA) standard and North America time division multiple access (TDMA) standard etc.These communication of operation standard support voice and data communication.The operation standard that occurs comprises universal mobile communications service (UMTS)/wideband CDMA (WCDMA) standard recently.The UMTS/WCDMA standard adopts the high-throughput of CDMA principle and support voice and data.Contrast North America CDMA standard, the transmission in the UMTS/WCDMA system is not sorted according to time reference (being the gps time benchmark).Therefore, wireless terminal and base station more complicated than North America cdma system synchronously in the WCDMA system.The processing resource that cell search, identification of base stations and base station synchronization consumption are very big.These continued operations can make the baseband processor overload, cause the reduction of performance and battery life.
Summary of the invention
Method and system provided by the invention will be set forth further combined with accompanying drawing, summary of the invention and claim.
According to an aspect of the present invention, provide a kind of baseband processing module that is used for Wideband Code Division Multiple Access (WCDMA) (WCDMA) radio frequency (RF) transceiver, described baseband processing module comprises:
The TX processing section is connected to the RF front end of described RF transceiver communicatedly and receives outbound data, handles described outbound data with generation base band TX signal, and exports the RF front end of described base band TX signal to described RF transceiver;
Processor;
Be connected to the memory of described processor communicatedly;
Be connected to the RX interface of the RF front end of described WCDMARF transceiver communicatedly, receive the base band RX signal that carries the WCDMA signal from described RF front end; And
Be connected to the cell search device module of described processor and described RX interface communicatedly, described cell search device module is carried out following operation:
Receive described base band RX signal;
Scan the WCDMA energy in the described base band RX signal;
Obtain slot synchronization based on correlation to described WCDMA signal with the primary synchronization channel (PSCH) of described WCDMA signal;
Obtain the frame synchronization of described WCDMA signal and discern the code group of described WCDMA signal based on correlation with the secondary synchronization channel (SSCH) of described WCDMA signal; And
Based on the correlation identification of the Common Pilot Channel (CPICH) of described WCDMA signal
The scrambler of described WCDMA signal.
Preferably, described cell search device module is further based on estimating the signal-to-jamming ratio of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module further based on and the correlation estimation RF transceiver of the CPICH of described WCDMA signal and the frequency offset between the RF reflector.
Preferably, described cell search device module is further used for:
Receive about being close to the information of honeycomb from the processor that communicates to connect, comprise the code group of sequential offset information and described contiguous honeycomb;
Based on the correlation of the PSCH of the WCDMA signal of described contiguous honeycomb, obtain slot synchronization with the WCDMA signal of described contiguous honeycomb;
Based on the correlation of the CPICH of the WCDMA signal of described contiguous honeycomb, discern the scrambler and the frame boundaries of the WCDMA signal of described contiguous honeycomb.
Preferably, described cell search device module comprises:
First order acquisition module obtains slot synchronization to described WCDMA signal based on the correlation with the PSCH of described WCDMA signal;
Second level acquisition module obtains frame synchronization to described WCDMA signal based on the correlation with the SSCH of described WCDMA signal, and discerns the code group of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module comprises:
The configurable first order and second level acquisition module, when being in first configuration, obtain slot synchronization based on correlation to described WCDMA signal with the PSCH of described WCDMA signal, and be in for second when configuration, obtain the frame synchronization of described WCDMA signal and discern the code group of described WCDMA signal based on correlation with the SSCH of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module comprises:
Configurable first order acquisition module, carry out following operation:
Be in for first when configuration, obtaining slot synchronization described WCDMA signal based on correlation with the PSCH of described WCDMA signal;
Be in for the 3rd when configuration, based on the correlation of at least one PSCH of a plurality of WCDMA signals, obtain the multipath time sequence information of a plurality of WCDMA signals of a plurality of contiguous honeycombs;
Second level acquisition module obtains the frame synchronization of described WCDMA signal and discerns the code group of described WCDMA signal based on the correlation with the SSCH of described WCDMA signal;
Configurable third level acquisition module, carry out following operation:
Based on the correlation of the CPICH of described WCDMA signal, discern the scrambler of described WCDMA signal;
Based on the correlation of the CPICH of a plurality of WCDMA signals of a plurality of contiguous honeycombs, discern the scrambler of a plurality of WCDMA signals of a plurality of contiguous honeycombs.
Preferably, described baseband processing module further comprises:
The multipath scanner module; And
The rake finger receiver combiner module.
According to an aspect of the present invention, provide a kind of baseband processing module that is used for Wideband Code Division Multiple Access (WCDMA) (WCDMA) radio frequency (RF) transceiver, described baseband processing module comprises:
The TX processing section is connected to the RF front end of described RF transceiver communicatedly and receives outbound data, handles described outbound data with generation base band TX signal, and exports the RF front end of described base band TX signal to described RF transceiver;
Processor;
Be connected to the memory of described processor communicatedly;
Be connected to the RX interface of the RF front end of described WCDMARF transceiver communicatedly, receive the base band RX signal that carries the WCDMA signal from described RF front end; And
Be connected to the cell search device module of described processor and described RX interface communicatedly, described cell search device module comprises:
First order acquisition module obtains slot synchronization to described WCDMA signal based on the correlation with the PSCH of described WCDMA signal;
Second level acquisition module obtains frame synchronization to described WCDMA signal based on the correlation with the SSCH of described WCDMA signal, and discerns the code group of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module is further based on estimating the signal-to-jamming ratio of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module further based on and the correlation estimation RF transceiver of the CPICH of described WCDMA signal and the frequency offset between the RF reflector.
Preferably, described cell search device module is further used for:
Receive about being close to the information of honeycomb from the processor that communicates to connect, comprise the code group of sequential offset information and described contiguous honeycomb;
Based on the correlation of the PSCH of the WCDMA signal of described contiguous honeycomb, obtain slot synchronization with the WCDMA signal of described contiguous honeycomb;
Based on the correlation of the CPICH of the WCDMA signal of described contiguous honeycomb, discern the scrambler and the frame boundaries of the WCDMA signal of described contiguous honeycomb.
Preferably, described configurable first order acquisition module further had been in for the 3rd when configuration, based on the correlation of at least one PSCH of a plurality of WCDMA signals, obtain the multipath time sequence information of a plurality of WCDMA signals of a plurality of contiguous honeycombs;
Described configurable third level acquisition module further based on the correlation of the CPICH of a plurality of WCDMA signals of a plurality of contiguous honeycombs, discern the scrambler of a plurality of WCDMA signals of a plurality of contiguous honeycombs.
Preferably, described baseband processing module further comprises:
The multipath scanner module; And
The rake finger receiver combiner module.
According to an aspect of the present invention, provide a kind of baseband processing module that is used for Wideband Code Division Multiple Access (WCDMA) (WCDMA) radio frequency (RF) transceiver, described baseband processing module comprises:
The TX processing section is connected to the RF front end of described RF transceiver communicatedly and receives outbound data, handles described outbound data with generation base band TX signal, and exports the RF front end of described base band TX signal to described RF transceiver;
Processor;
Be connected to the memory of described processor communicatedly;
Be connected to the RX interface of the RF front end of described WCDMA RF transceiver communicatedly, receive the base band RX signal that carries the WCDMA signal from described RF front end; And
Be connected to the cell search device module of described processor and described RX interface communicatedly, described cell search device module comprises:
The configurable first order and second level acquisition module, when being in first configuration, obtain slot synchronization based on correlation to described WCDMA signal with the PSCH of described WCDMA signal, and be in for second when configuration, obtain the frame synchronization of described WCDMA signal and discern the code group of described WCDMA signal based on correlation with the SSCH of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module is further based on estimating the signal-to-jamming ratio of described WCDMA signal with the correlation of the CPICH of described WCDMA signal.
Preferably, described cell search device module further based on and the correlation estimation RF transceiver of the CPICH of described WCDMA signal and the frequency offset between the RF reflector.
Preferably, described cell search device module is further used for:
Receive about being close to the information of honeycomb from the processor that communicates to connect, comprise the code group of sequential offset information and described contiguous honeycomb;
Based on the correlation of the PSCH of the WCDMA signal of described contiguous honeycomb, obtain slot synchronization with the WCDMA signal of described contiguous honeycomb;
Based on the correlation of the CPICH of the WCDMA signal of described contiguous honeycomb, discern the scrambler and the frame boundaries of the WCDMA signal of described contiguous honeycomb.
Preferably, the described configurable first order and second level acquisition module further had been in for the 3rd when configuration, based on the correlation of at least one PSCH of a plurality of WCDMA signals, obtain the multipath time sequence information of a plurality of WCDMA signals of a plurality of contiguous honeycombs;
Described configurable third level acquisition module further based on the correlation of the CPICH of a plurality of WCDMA signals of a plurality of contiguous honeycombs, discern the scrambler of a plurality of WCDMA signals of a plurality of contiguous honeycombs.
Preferably, described baseband processing module further comprises:
The multipath scanner module; And
The rake finger receiver combiner module.
From following description and accompanying drawing, can obtain various advantages of the present invention, various aspects, character of innovation, and the more deep understanding of embodiment details.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is a schematic diagram of supporting the part of the cellular radio Communication system of the wireless terminal of operation according to the present invention;
Fig. 2 is the functional block diagram of wireless terminal of the present invention;
Fig. 3 is the block diagram of each parts of baseband processing module according to an embodiment of the invention;
Fig. 4 A is the power spectral density schematic diagram that the present invention supports the WCDMA RF frequency band of a plurality of RF carrier waves;
Fig. 4 B is the sequential schematic diagram of the various channels of the present invention WCDMA system of being used for cell search and base station synchronization;
Fig. 5 A is the schematic diagram that postpones expansion (delay spread) at very first time place's multipath according to the present invention;
Fig. 5 B is the schematic diagram that postpones expansion according to the present invention at the multipath at second time place;
Fig. 6 searches for, searches, synchronously and receive the flow chart of the operation of data from the base station according to the one embodiment of the invention wireless terminal;
Fig. 7 is the block diagram according to first embodiment of cell search module of the present invention;
Fig. 8 is the block diagram according to second embodiment of cell search module of the present invention;
Fig. 9 is the operational flowchart of the cell search device module among Fig. 7 and/or Fig. 8;
Figure 10 is the block diagram according to the configurable first order/second level acquisition module of cell search device module of the present invention;
Figure 11 is the block diagram of acquisition module that is used to carry out the cell search device module of the initial cell search operation of the first order according to the present invention;
Figure 12 is used to carry out contiguous cell search first order operation and the block diagram of the acquisition module of the cell search device module of the cell search first order operation that detects according to the present invention;
Figure 13 is the block diagram of acquisition module that is used to carry out the cell search device module of initial cell search second level operation according to the present invention;
Figure 14 is the block diagram of acquisition module of cell search device module that is used to carry out the cell search second level operation of detection according to the present invention;
Figure 15 is the block diagram according to first embodiment of the configurable third level acquisition module of cell search device module of the present invention;
Figure 16 is the block diagram according to second embodiment of the configurable third level acquisition module of cell search device module of the present invention;
Figure 17 is the block diagram of securing component of configurable third level acquisition module that is used to carry out the cell search device module of initial cell search third level operation according to the present invention;
Figure 18 is the block diagram of securing component of configurable third level acquisition module of cell search device module that is used to carry out the cell search third level operation of the contiguous cell search third level and detection according to the present invention.
Embodiment
Fig. 1 is a part system schematic of supporting the cellular radio Communication system 100 of the wireless terminal of operation according to the present invention.Cellular radio Communication system 100 comprises PSTN (PSTN) interface 101, mobile switching centre for example, the wireless network packet data network 102 that comprises GPRS Support Node, EDGE support node, WCDMA support node and other parts, radio network controller/base station controller (RNC/BSCs) 152 and 154, and base station/Node B s 103,104,105 and 106.Wireless network packet data network 102 is connected to extra individual and public packet data network 114, for example the Internet, WLAN, LAN etc.Traditional voice terminal 121 is connected to PSTN 110.IP network transmits voice (VoIP) terminal 123 and PC 125 is connected to the Internet/WAN 114.PSTN interface 101 is connected to PSTN 110.Certainly, this ad hoc structure can be according to the variation of system and difference.
Each base station/Node B s 103-106 serves the honeycomb/one group section that its radio communication supports that scope is interior.The Radio Link that comprises forward link part and reverse link part is supported the radio communication between the wireless terminal of base station and its service.These Radio Links are supported digital data communications, VoIP communication and the communication of other digital multimedia.Cellular radio Communication system 100 also can compatible simulated operation.Cellular radio Communication system 100 is supported one or more in UMTS/WCDMA standards, global system for mobile communications (GSM) standard, GSM GPRS (GPRS), enhanced data rates for gsm evolution technology and/or various other CDMA standards, TDMA and/or the FDMA standard etc.
Wireless terminal 116,118,120,122,124,126,128 and 130 is connected to cellular radio Communication system 100 by the Radio Link with base station 103-106.As shown in the figure, wireless terminal can comprise cell phone 116 and 118, portable computer 120 and 122, desktop computer 124 and 126 and data terminal 128 and 130.Yet cellular radio Communication system 100 is also supported and the communicating by letter of the wireless terminal of other type.As everyone knows, portable computer 120 and 122, desktop computer 124 and 126, data terminal 128 with 130 and cell phone 116 and equipment such as 118 can view Internet 114, transmit and receive data and for example communicate by letter Email, transmission and reception file and carry out other data manipulation.These data manipulations have very big data download rate requirement mostly, but the requirement of the speed that uploads data is not high.Therefore part or all wireless terminal 116-130 can support EDGE operation standard, GPRS standard, UMTS/WCDMA standard and/or GSM standard.
Fig. 2 is the functional block diagram of wireless terminal of the present invention, comprises host process part 202 and the radio device 204 that is associated.For cell phone, host process part 202 and radio device 204 are contained in the same casing.In some cell phone, the part or all of parts of host process part 202 and radio device 204 are integrated on the same integrated circuit (IC).For personal digital assistant (PDA) main frame, portable computer main frame and/or personal host computer, radio device 204 can be arranged in expansion card, and therefore is positioned at the housing that separates with host process part 202.Host process part 202 comprises processing module 206, memory 208, radio interface 210, input interface 212 and output interface 214 at least.Processing module 206 and memory 208 execution commands are to support the host terminal function.For example, for the cell phone main process equipment, processing module 206 is carried out user interface operations, and carries out the host software program in other operation.
Baseband processing module 222 is in conjunction with the operational order, combine digital receiver function and the digit emitter function that are stored in the memory 234.The digit receiver function includes but not limited to that digital intermediate frequency is to baseband-converted, demodulation, constellation diagram mapping, descrambling and/or decoding.The digit emitter function includes but not limited to that coding, scrambling, planisphere mapping, modulation and/or digital baseband to intermediate frequency change.Transmission that baseband processing module 222 provides and receiving function can use shared treatment facility and/or independent process equipment to realize.Treatment facility can comprise microprocessor, microcontroller, digital signal processor, microprocesso, central processing unit, field programmable gate array, programmable logic device, state machine, logical circuit, analog circuit, digital circuit and/or any equipment based on operational order processing signals (simulation and/or numeral).Memory 234 can be one or more memory devices.Described memory devices can be the equipment of read-only memory, random access storage device, volatile memory, nonvolatile memory, static memory, dynamic memory, flash memory and/or any storing digital information.It should be noted that, if baseband processing module 222 is realized its one or more functions by state machine, analog circuit, digital circuit and/or logical circuit, the memory of storage respective operations instruction is embedded in the circuit that comprises state machine, analog circuit, digital circuit and/or logical circuit.
Be in operation, radio device 204 partly receives outbound data 250 by host interface 220 from host process.Host interface 220 route outbound data 250 are to baseband processing module 222, base station processing module 222 according to specific wireless communication standard (as, UMTS/WCDMA, GSM, GPRS, EDGE etc.) handle outbound data 250 to produce the data 252 of digital transmission formats.The data 252 of digital transmission formats are the low IF signals of digital baseband signal or numeral, and wherein the frequency range of low IF signal is that 0Hz is to several thousand Hz/ several million Hz.
Digital to analog converter 236 is converted to analog domain with the data 252 of digital transmission formats by numeric field.Filtering/gain module 238 filtered and/or adjusted the gain of analog signal before transmitting the supreme modular converter 240 of analog signal.Last modular converter 240 is the RF signal based on local crystal oscillator 254 direct converting analogue base band of reflector or the low IF signal that local crystal oscillator module 232 produces.Power amplifier 242 amplification RF signals are to produce departures RF signal 256, then by 258 filtering of TX filter module.TX/RX handover module 260 receives from TX filter module 258 and amplifies and filtered RF signal, and transmits output RF signal 256 to antenna 248, launches departures RF signals 256 to target device, as base station 103-106 by antenna 248.
Fig. 3 is the block diagram of each parts of baseband processing module 222 according to an embodiment of the invention.The parts of baseband processing module 222 (baseband processor) comprise memory 306 on processor 302, memory interface 304, the plate, descending/upstream Interface 308, TX processing unit 310 and TX interface 312.Baseband processing module 222 further comprises RX interface 314, cell search device module 316, multipath scanner module 318, rake finger receiver combiner module 320 and turbine decode module 322.Baseband processing module 222 is connected to external memory storage 234 in certain embodiments.Yet in other embodiments, memory 306 can satisfy memory requirement.
As describing among Fig. 2, baseband processing module 222 receives outbound data 250 from the host process part 202 that connects, and inbound data 270 is offered the host process part 202 of connection.Baseband processing module 222 transmits the transmission data (base band TX signal) 252 of number format to the RF front end that connects.Baseband processing module 222 receives the data 268 (base band RX signal) of digital received form from the RF front end that connects.As described in Figure 2, ADC 224 generates the data (base band RX data) 268 of digital received form, and the DAC 236 of RF front end receives the data (base band TX signal) 252 of digital transmission formats from baseband processing module 222.
Downlink/uplink interface 308 receives outbound data 250 from host process part (for example, the host process part 202) by host interface 220.Downlink/uplink interface 308 transmits inbound data 270 to the host process part 202 that connects by host interface 220.The reader can be understood that baseband processing module 222 can be integrated in the miscellaneous part of radio device 204 on the same integrated circuit.Perhaps, radio device 204 (comprising baseband processing module 222) can be integrated on the same circuit with host process part 202.Therefore, in this case, all parts among Fig. 2 except antenna, display, loud speaker and keyboard, keypad, microphone etc. can be integrated on the same integrated circuit.Yet in other embodiments, baseband processing module 222 and host process part 202 can be arranged on independently on the integrated circuit.Without departing from the present invention, other various integrated circuit formation also is possible.TX processing unit 310 and TX interface 312 are connected to the RF front end communicatedly, as shown in Figure 2, and are connected to downlink/uplink interface 308 communicatedly.TX processing unit 310 and TX interface 312 receive outbound data from downlink/uplink interface 304, handle this outbound data with generation base band TX signal 252, and output base band TX signal 252 to RF front ends, as shown in Figure 2.
Fig. 4 A is the power spectral density schematic diagram that the present invention supports the WCDMA RF frequency band 400 of a plurality of RF carrier waves 402,404 and 406.WCDMA RF frequency band 400 extends on the frequency spectrum and comprises WCDMARF carrier wave 402,404 and 406.According to an aspect of the present invention, support the cell search device module 316 of the baseband processing module 222 of the RF transceiver that WCDMA operates to scan WCDMA RF frequency bands 400 to discern the WCDMA RF energy of at least one WCDMA carrier wave 402,404 or 406.In initial cell search operating process, cell search device module 316 goes out the strongest WCDMA carrier wave in conjunction with other component identification of baseband processing module 222, for example, and 404.Subsequently, the WCDMA signal in the cell search device module 316 synchronous WCDMA carrier waves 404.Corresponding specific base stations honeycomb of described WCDMA signal or section.In initial cell search simultaneous operation process, cell search device module 316 first-selected the strongest honeycomb/sections synchronously.
From a plurality of base stations/WCDMA signal that the section sends can use shared WCDMA RF carrier wave 404.Perhaps, can use different WCDMA carrier waves from the WCDMA signal of different base station/section, as 402 or 406.According to the present invention, cell search device module 316 and baseband processing module 222 synchronous WCDMA signals from the one or more WCDMA RF of running on of different honeycomb/sections frequency band 402,404 or 406.Described simultaneous operation does not occur over just in the initial cell search operation, and occurs in contiguous cell search or the operation of detection cell search.
Fig. 4 B is the sequential schematic diagram of the various channels of the present invention WCDMA system of being used for cell search and base station synchronization.WCDMA signal shown in the figure has 15 time slot frame structures, extends in the 10ms.Described WCDMA signal comprises synchronizing channel (SCH) and introduces down link and carry out the Common Pilot Channel of cell search operation (Common Pilot Channel is called for short " CPICH ") to assist wireless transceiver.SCH is further divided into main SCH (PSCH) and time SCH (SSCH).PSCH transmits the Primary Synchronisation Code (PSC) with the automatic correlation of good periodicity, and SSCH transmits secondary synchronization code (SSC).The cyclic shift of PSCH and SSCH is exclusive, therefore can realize reliable time slot and frame synchronization.The length of PSCH and SSCH is 256 sheet sign indicating numbers (256chips), has special form, is 1/10 of each time slot.Remaining time slot is Common Control Physical Channel (CCPCH).Shown in Fig. 4 A, PSCH and SSCH launch once in the same position of each time slot.The PSCH sign indicating number is identical in all time slots, and therefore is used to detect boundary of time slot.SSCH is used to discern the border of scrambling code group (scrambling code group) and frame.Therefore, each time slot of SSCH sequence all changes, and encodes by the code book (code-book) that uses 64 code words (each code word is represented a code group).CPICH uses fixed rate (30kbps, so 10 symbols of each time slot) to transmit predefined symbol, and its spreading factor (spreading factor) is 256.The channelization code of CPICH is set to the 0th coding.
According to the present invention, the cell search device module 316 of the baseband processing module 222 of WCDMA RF transceiver is used for: the WCDMA energy of (1) scanning in the base band RX signal of the corresponding WCDMA signal that the RX interface receives; (2) obtain slot synchronization with the WCDMA signal based on correlation with the PSCH of WCDMA signal; (3) based on the correlation of the SSCH of WCDMA signal, obtain the frame synchronization with the WCDMA signal that receives, and identify the code group of the WCDMA signal of reception; (4) based on the correlation of the CPICH of WCDMA signal, the scrambler of identification WCDMA signal.
Fig. 5 A is the schematic diagram of the present invention in the multipath time delay expansion at very first time T1 place.Known, in wireless communication system, the signal of emission can use various routes to be sent to the RF receiver from the RF reflector.With reference to Fig. 1,103 can use a plurality of paths to the transmission of wireless terminal 116 from the base station, and each path arrives at the time corresponding frame.The copy that transmits of these a plurality of receptions is called " multipath " signal component.With reference to Fig. 5 A, be depicted as the time delay expansion that time T 1 place comprises the signal strength signal intensity of multi-path signal composition and correspondence thereof.
Service honeycomb (serving cell) signal component 504 is included in the multi-path signal composition 508,510,512 and 514 that each time point receives in the one-period reference time.Contiguous honeycomb (neighbor cell) signal component 506 comprises multi-path signal composition 516,518 and 520.It should be noted that service cellular signal composition 504 and contiguous cellular signal composition 506 arrive in the different time points of this periodic reference in the time, because they are unjustified in time.Known, the multi-path signal composition of RF signals transmitted arrives the RF receiver in the different time.Known equally, the signal-to-jamming ratio of the quantity of the multi-path signal composition of reception and signal strength signal intensity and each multi-path signal composition changes along with the variation of time.
Fig. 5 B is the schematic diagram of the present invention in the multipath time delay expansion at second time T, 2 places.Because the characteristic of channel from the RF reflector to the RF receiver changes in time, thereby service cellular signal composition 504 and the also change thereupon of contiguous cellular signal composition 506.Therefore, for example, the multipath composition 508 of Fig. 5 B, the same with the multipath composition 508 shown in Fig. 5 A have the identical time relationship to the periodic reference time, but have than signal-to-jamming ratio bigger among Fig. 5 A or signal to noise ratio.In addition, comparison diagram 5A, multipath composition 510 is lost, and the amplitude of multipath composition 512 reduces, and the amplitude of multipath composition 514 increases.In addition, service cellular signal composition 504 includes a new multipath composition 552, is present in time T 2, but is not present in time T 1.
The contiguous honeycomb multi-path signal composition 506 of time T 2 and its time T 1 also inequality in Fig. 5 A among Fig. 5 B.In this case, compare with time T 1, multi-path signal composition 516 has different amplitudes with 518 in time T 2.In addition, crossing signal component 520 at the multipath of time T the last 1 is not present in the time T 2.In addition, the new multi-path signal composition 554 of time T 2 appearance is not present in the time T 1.The appearance that cell search device module 316, multipath scanner module 318 and rake finger receiver module 320 are followed the trail of these multi-path signal compositions, the described multi-path signal composition of sync section, and by the described multi-path signal composition reception of part data.
Fig. 6 is according to the search of one embodiment of the invention wireless terminal, search, synchronously and receive the flow chart of the operation of data from the base station.The operation 600 of Fig. 6 is carried out by cell search device module 316, multipath scanner module 318 and the rake finger receiver module 320 of the baseband processing module 222 of the radio device 204 of the wireless terminal of setting up according to the present invention.Operation 600 begins by starting or resetting, or begins when the RF terminal detects the service honeycomb in the WCDMA system.Operation starts from the RF transceiver and carries out the RF scanning of WCDMARF frequency band to detect WCDMA energy (step 602).The RF of WCDMARF frequency band scanning is the joint operation between the baseband processing module 222 of radio device 204 among the RF front end component of RF transceiver radio device 204 among Fig. 2 and Fig. 2.With reference to Fig. 6 and Fig. 3, the RF scanning of carrying out the WCDMARF frequency band with the process that detects the WCDMA energy in, the RF front-end tunes is the various RF channels in the WCDMARF frequency band 400, as described in the description of carrying out as reference Fig. 4 A.With reference to each parts of baseband processing module 222, cell search device module 316 can interact to detect the WCDMA energy in the RF of WCDMARF frequency band scanning process with processor 302.
After RF in the step 602 scanning is finished, processor 302 associating cell search device module 316 and the specific RF frequency bands of RF front end recognition, for example 404 of Fig. 4 A, to detect and synchronously to the WCDMA signal.The cell search device module 316 of baseband processing module 222 (step 604) in initial cell search operation is carried out the first order (Phase I), the second level (Phase II) and the third level (Phase III) operation.When carrying out its initial cell search operation, cell search device module 316 is based on obtaining slot synchronization with the WCDMA signal with the correlation of the PSCH of WCDMA signal in its first order operation.Subsequently, in second level operation, cell search device module 316 obtains frame synchronization with the WCDMA signal that receives based on the correlation with the SSCH of WCDMA signal, and the code group of the WCDMA signal that receives of identification.Subsequently, in third level operation, cell search device module 316 based on the scrambler of the correlation identification WCDMA signal of the CPICH of WCDMA signal.The mode that the first order of cell search device module 316, the second level and third level operation are carried out and the structure of use will provide more detailed description in conjunction with Fig. 7-18.The result of the first order that cell search device module 316 is carried out, the second level and third level operation produces the time sequence information (timing information) about at least one multi-path signal composition of WCDMA signal.In one embodiment, the scrambler of the strongest multi-path signal composition of the WCDMA signal of the WCDMARF carrier wave of the first order, the second level and third level operation generation time sequence information and selection.
Fig. 7 is the block diagram according to first embodiment of cell search module 316 of the present invention.Cell search device module 316 is connected to processor 302, multipath scanner module 318 and RX interface 314.Multipath scanner module 318 comprises the base band RX signal input 702 that is connected to RX interface 314, and the interface 704 that is connected to processor 302, multipath scanner module 318 and control circuit 706.
Cell search device module 316 further comprises first order acquisition module, obtains slot synchronization to the WCDMA signal that receives based on the correlation with the PSCH of WCDMA signal.The specific embodiment of the structure of configurable first order acquisition module 708 will be described in detail in conjunction with Figure 10,11 and 12.Cell search device module 316 further comprises configurable second level acquisition module 710, based on obtaining frame synchronization to the WCDMA signal with the correlation of SSCH, and the code group of the WCDMA signal that receives of identification.The structure of the certain embodiments of configurable second level acquisition module 710 will be described in detail in conjunction with Figure 13 and 14.Cell search device module 316 includes configurable third level acquisition module 712, based on discerning the scrambler of this WCDMA signal with the correlation of the CPICH of WCDMA signal.The structure of the certain embodiments of third level acquisition module 712 will be described in detail in conjunction with Figure 15-18.
Fig. 8 is the block diagram according to second embodiment of cell search module 316 of the present invention.The structure of cell search device module 316 comprises interface 804, base band RX signal input 802, control circuit 806, the configurable first order/second level acquisition module 808 and configurable third level acquisition module 812 among Fig. 8.Base band RX signal input 802 is connected to RX interface 314, and interface 804 is connected to processor 302 and multipath scanner module 318.
Compare with the structure of Fig. 7, the cell search device module 316 among Fig. 8 comprises the configurable first order/second level acquisition module 808.When first configuration status, the configurable first order/second level acquisition module 808 obtains slot synchronization to the WCDMA signal that receives based on the correlation with the PSCH of WCDMA signal.In addition, when second configuration status, the configurable first order/second level acquisition module 808 obtains the frame synchronization of the WCDMA signal that receives and the code group of the WCDMA signal that identification receives based on the correlation with the SSCH of WCDMA signal.The structure of the configurable first order/second level acquisition module 808 and operation will be described in detail in conjunction with Figure 10-14.The configurable third level acquisition module 812 of cell search device module 316 based on the scrambler of the correlation identification WCDMA signal of the CPICH of WCDMA signal.
As describing in this specification, the configurable first order acquisition module 708 of Fig. 7, configurable second level acquisition module 710 and configurable third level acquisition module 712, and the configurable first order/second level acquisition module 808 of Fig. 8 and configurable third level acquisition module 812 all are configured.The various configurable form of these modules will be described further combined with Figure 10-18, and will describe the various operations of these modules in conjunction with Fig. 9.
Fig. 9 is the flow chart of the operation of Fig. 7 of the present invention and/or cell search device module 316 shown in Figure 8.Step 902, cell search device module 316 is in idle pulley when not carrying out its specific operation.In first group of operation, step 903, cell search device module 316 is carried out the initial RF power scan.Step 904, in the operation of initial RF power scan, the first order acquisition module of cell search device module 316 can be carried out energy so survey based on the first order correlated results in the RF frequency band of each scanning.Perhaps, the RF front end of cell search device module 316 combining wireless electric installations 204 is only checked detected energy in each WCDMA RF frequency band.When these operations were finished, cell search device module 316 reported to the WCDMARF carrier energy processor 302 of connection.Which RF carrier wave the upper-layer protocol operation of described report active processor 302 should use carry out initial cell search operation with decision.
Behind the initial cell search operation start, the first order acquisition module 708 of the cell search device module 316 of Fig. 7 or the configurable first order/second level acquisition module 808 of Fig. 8 are configured to carries out initial cell search first order operation in the step 907.After finishing described configuration, the configurable first order acquisition module 708 or the configurable first order/second level acquisition module 808 carried out initial cell search first order operation, obtains frame synchronization to the WCDMA signal that receives based on the correlation with the PSCH of WCDMA signal.
Subsequently, step 910 is carried out frame synchronization and the code group identification of initial cell search second level operation to obtain the WCDMA signal.The second level is operated by the configurable first order of the cell search device module 316 of the configurable second level acquisition module 710 of the cell search device module 316 of Fig. 7 or Fig. 8/second level acquisition module 808 and is carried out.After executing the identification of slot synchronization, frame synchronization and code group, step 912, cell search device module 316 by with the scrambler of the correlation identification WCDMA signal of CPICH.In carrying out third level operation, the configurable third level acquisition module 712 of Fig. 7 or the configurable third level acquisition module 812 of Fig. 8 are configured to carries out initial cell search third level operation.Step 914 then, the operation of the cell search device module 316 verification third level, and in step 916, carry out the frequency offset estimation, and in step 918, carry out space and time diversity emission (Space Time Transmit Diversity is abbreviated as STTD) and detect.After the step 918, as step 906, operation is back to step 902.
In another group operation, step 919, the contiguous cell search operation of cell search device module 316 initialization.The initialization of contiguous cell search module generally by processor 302 in successful execution execution after the initial cell search operation.Known, in the WCDMA system, contiguous honeycomb/section has and different time slot and the frame sequential in service honeycomb/section.Step 920 can be received by the RF transceiver about the information of code group, related time-slot and the frame sequential of contiguous honeycomb.Described information can be contained in from the control transmission that the service honeycomb receives.Step 922, based on the information that receives, the multipath composition of all the contiguous honeycombs in the 316 search first order operations of processor 302 indication cell search device modules.In contiguous cell search first order configuration, described first order operation can be passed through the configurable first order/second level acquisition module 808 of configurable first order acquisition module 708 or Fig. 8 of Fig. 7 and carry out.Contiguous honeycomb first order configuration is different with initial cell search first order configuration.After first order operation is successfully finished, in the step 924, the scrambler of each multipath composition of the contiguous honeycomb WCDMA signal that the 316 execution third level operations of cell search device module are found in operating with the identification first order.Then, in the step 926, cell search device module 316 is optionally carried out the STTD detection to closing on honeycomb/section.
In another group operation of the present invention, the RF transceiver runs in the GSM pattern and serves cellular communication with one.Except its content related to the present invention, foundation is not described in detail in this application with the concrete operations of communicating by letter of a service honeycomb/section under the GSM pattern.If the contiguous cell search in the step 927 (GSM pattern) operation is initialised, the RF terminal must still be supported the GSM operation simultaneously again to himself being configured to carry out contiguous cell search operation.Step 928, cell search device module 316 is reset, and is the WCDMA operation setting at a time slot only perhaps.Because this time slot is quite short, operation is quickened to carry out, and executable relevant quantity is restricted in contiguous cell search process.In some operation, contiguous cell search information will receive (step 930) by the GSM honeycomb of service.Step 932 then, based on this information, cell search device module 316 is carried out the multipath composition of first order operation with searching near honeycomb/section.Later step 934, cell search device module 316 is carried out the scrambler that the third level is operated each multipath composition of contiguous honeycomb/section of finding with identification.
In another group operation, step 935, cell search device module 316 are carried out the cell search operation that detects.These operations are similar to the initial honeycomb operation of step 907-918.In this case, step 936, cell search device module 316 are carried out first order operation to detect the multipath time slot sequential of detected honeycomb/section transmission.Multi-path signal composition after step 938 then, cell search device module 316 detect each is carried out second level frame synchronization and code group identifying operation.Step 940 then, cell search device module 316 are carried out the scrambler of third level operation with the multi-path signal composition after discerning each and detecting.Later step 942, cell search device module 316 are optionally carried out STTD and are detected.After the step 926,934 and 942, operation all turns back to step 902.
Figure 10 is the block diagram of the configurable first order/second level acquisition module of cell search device module 316 of the present invention.Parts 808 among the Fig. 8 that introduces before the configurable first order/second level acquisition module 808 of Figure 10 is.The configurable first order/second level acquisition module 808 of Figure 10 can be configured in initial cell search phase place first order configuration, contiguous cell search first order configuration, the configuration of the initial cell search second level or the configuration of the contiguous cell search second level.These configurations will be described in detail respectively with further reference to Figure 11,12,13 and 14.It should be noted that the configuration at initial cell search is identical or approximate with the configuration of operating at the cell search after detecting.In addition, it should be noted that the configurable first order acquisition module 708 among Fig. 7 can have similar structure to the first order/second level acquisition module 808 with configurable second level acquisition module 710.
The configurable first order/second level acquisition module 808 comprises control module 1002, first order matched filter 1004, configurable second level module 1006, configurable accumulator module 1008 and configurable classification/output module 1010.First order matched filter 1004 receives the WCDMA sample of signal from input of base band RX signal and buffer module 702 (802).16 scrambler primitive that first order matched filter 1004 will receive are relevant with this base band RX sample of signal, and produce a plurality of (for example 16) relevant output and offer configurable second level module 1006.Based on the configuration of the first order or second level operation, configurable second level module 1006 is carried out filtering operation, hadamard (Hadamard) is relevant and shielding (mask) operation, amplitude are determined operation and/or add operation.The output that configurable second module produces is received by configurable accumulator module 1008, and carries out and add up.The output of configurable accumulator module 1008 offers configurable classification/output module 1010.The operation of control module 1002 control first order matched filters 1004, configurable second level module 1006, configurable accumulator module 1008 and configurable classification/output module 1010.Control module 1002 is carried out with control circuit 706 (806) alternately.Configurable classification/output module 1010 is connected to interface 704 (804).Describe in detail as Figure 11-14, configurable first order acquisition module 708, configurable second level acquisition module 710 and the configurable first order/second level acquisition module 808 can be through configurations with again after the configuration, and that carries out the operation of the first order and the second level variously obtains operation.
Figure 11 is the block diagram of the acquisition module of the present invention's cell search device module 316 of being used to carry out the initial cell search operation of the first order.The acquisition module of Figure 11 can be the first order acquisition module of Fig. 7 or the configurable acquisition module in the first order/second level of Fig. 8, obtains slot synchronization to the WCDMA signal that receives based on the correlation with the PCSH of WCDMA signal.According to the configuration of Figure 11, second level module 1006 comprises second level matched filter 1102, first amplitude/energy determination module 1104 and second amplitude/energy determination module 1106.The correlation that first amplitude/energy determination module 1104 receives about sheet sign indicating number 0-127, the information that second amplitude/energy determination module 1106 receives about the correlation of sheet sign indicating number 128-256, these correlations are generated by second level matched filter 1102.Amplitude/energy determination module 1104 and 1106 is determined amplitude or energy, the perhaps approximation of the input of its correspondence.Summation module 1108 is determined the result, output is sued for peace, and export summed result to accumulator 1008 from first amplitude/energy determination module 1104 and second amplitude/energy determination module reception amplitude.After the initial cell search operation of these first order, configurable classification/output module 1010 is configured to and produces the maximum output V-out that is stored in the accumulator 1008.
Configurable classification/output module 1010 is determined the maximum voltage (V-out) that accumulator 1008 is represented, and the amplitude and the sequential of corresponding component are exported as it.These information are corresponding to the strongest multipath composition of the WCDMA signal of determining in the slot synchronization of operating in the first order of configurable first order acquisition module 708 or the configurable first order/second level acquisition module 808.Described information offers configurable second level acquisition module 710 or the configurable first order/second level acquisition module 808 in second configuration of carrying out the operation of the initial cell search second level.
Figure 12 is that the present invention is used to carry out contiguous cell search first order operation and the block diagram of the acquisition module of the cell search device module of the cell search first order operation that detects.The acquisition module of Figure 12 can be the configurable first order/second level acquisition module 808 in the configurable first order acquisition module 708 or second configuration, and wherein acquisition module is carried out the cell search first order operation of contiguous cell search first order operation and detection.The input sample of first order matched filter 1004 execution WCDMA signals is relevant with 16 scrambler primitive, and produces a plurality of outputs.Described a plurality of output is received by the second level matched filter 1102 of the configurable second level 1006.The output of second level matched filter 1102 is received by amplitude/energy determination module 1202, and the output of amplitude/energy determination module 1202 offers accumulator 1008.Configurable classification/output module 1010 is configured to determines a plurality of multipath compositions, and exports these multipath compositions.In specific operation, a plurality of first group of multipath composition and corresponding a plurality of second group of multipath composition of the corresponding peak signal of classification/output module 1010 outputs than weak signal.
Figure 13 is the module map of the acquisition module of the present invention's cell search device module 316 of being used to carry out the operation of the initial cell search second level.The acquisition module of Figure 13 can be configurable second acquisition module 710 of Fig. 7 in the corresponding configuration or the configurable first order/second level acquisition module 808 of Fig. 8.In described configuration, acquisition module comprises first matched filter 1004, and 16 scrambler primitive are relevant with inbound baseband sample, to produce a plurality of second level hadamard (Hadamard) correlator and shielding devices 1302 of exporting to.Second level hadamard correlator and shielding device 1302 execution hadamard associative operations and masking operation are exported to amplitude/energy determination module 1304,1306 and 1308 with generation.Amplitude/energy determination module 1304 is based on the correlation activities about sheet sign indicating number 0-127, amplitude/energy determination module 1306 is based on the correlation activities about sheet sign indicating number 64-191, and amplitude/energy determination module 1308 is based on the correlation activities about sheet sign indicating number 128-256.The output that summation module 1108 receives from amplitude/energy determination module 1304,1306 and 1308, and generation exports accumulator to, the summed result that this accumulator reception summation module 1108 produces.In configuration shown in Figure 13, configurable classification/output module 1010 is configured to the maximum in generation or the definite accumulator 1008.Described maximum produces the code group and the frame sequential of the strongest WCDMA signal of second level operational processes.These information pass to third level acquisition module 712 or 812, are used for determining the scrambler of WCDMA signal.
Figure 14 is the block diagram of acquisition module of the cell search device module 316 of the present invention's cell search second level operation of being used to carry out detection.The acquisition module of Figure 14 can be configurable second acquisition module 710 or the configurable first order/second level acquisition module 808, in order to carry out the cell search second level operation that detects.In this configuration, first order matched filter 1004 receives the WCDMA signal, and this WCDMA signal is relevant with 16 scrambler primitive 1004, and produces a plurality of outputs.Described a plurality of output is received by second level hadamard correlator and shielding device 1402, carries out hadamard associative operation and masking operation.The result that second level hadamard correlator and shielding device 1402 produce is received by the amplitude of determining amplitude/energy determination module 1404.Accumulator 1008 receives the result that amplitude/energy determination module 1404 produces.In the configuration of Figure 14, configurable classification/output module 1010 is configured to grader, and grader 1010 produces the code group and the frame sequential of the cellular transmission that is output as detection.
Figure 15 is the block diagram of first embodiment of the configurable third level acquisition module of cell search device module 316 of the present invention.Configurable third level acquisition module 712/812 comprises control module 1502, IQ sample stage register 1504, output buffers 1506 and a plurality of third level securing component 1508A-1508F.Control module 1502 is connected to control circuit 706/806.Output buffers 1506 is connected to interface 704/804.IQ sample stage register 1504 is connected to input of base band RX signal and cache module 702/802.The operation of other parts among the configurable third level acquisition module 712-812 of control module 1502 controls.
, obtain in the operation in conjunction with Fig. 9-14 description as the front, can produce a plurality of supposition and postpone multi-path signal composition time slot sequential, frame sequential and out of Memory to configurable third level acquisition module 712/812 various.For each the supposition information that provides, third level acquisition module is determined corresponding scrambler as far as possible.Therefore, each third level securing component 1508A-1508F can be relevant with a unique multipath composition, to determine the corresponding scrambler of this multipath composition as far as possible.
Figure 16 is the block diagram of second embodiment of the configurable third level acquisition module of cell search device module 316 of the present invention.Second embodiment of configurable third level acquisition module 712/812 comprises control module 1602, output buffers 1606, IQ sample stage register 1604, PN status register 1608, PN maker 1610, Solution Expander 1612, the relevant combiner 1614 of CPICH1, the relevant combiner 1616 of CPICH2 and amplitude and addition module 1608.Control module 1602 is connected to control circuit 706/806.IQ sample stage register 1604 is connected to input of base band RX signal and cache module 702/802, and receives sample from it.Output buffers interface 1606 produces exports to interface 704/804.The structure of Figure 16 is compared with the structure of Figure 15, and the third level securing component of a plurality of parallel connections is not used.Perhaps, the structure of Figure 16 can be included among each third level securing component 1508A-1508F of Figure 15.Therefore, the detail of Figure 16 and structure are not the restrictions to the scope of third level acquisition module of the present invention.
Figure 17 is the block diagram of securing component of the configurable third level acquisition module of the present invention's cell search device module 316 of being used to carry out initial cell search third level operation.Securing component 1508A carries out the initial cell search operation of the third level.In this case, securing component 1508A comprises scrambling code generator 1704, control logic 1702, multiplier 1706, plural Solution Expander 1708, phase correction device 1710, relevant symbol combiner 1712, amplitude/energy determination module 1714, accumulator 1716 and maximum/authentication module 1718.Each parts among the control module 1502 control securing component 1508A.Perhaps, each parts among the control logic 1702 control securing component 1508A, and carry out alternately with control module 1502.
Figure 18 is the block diagram of securing component of configurable third level acquisition module of the cell search device module of the present invention's cell search third level operation of being used to carry out the contiguous cell search third level and detection.Securing component 1508 comprises control logic 1802, scrambler generation module 1804, multiplier 1806, plural Solution Expander 1808, summation module 1810 and 1812, amplitude/energy determination module 1814, subtraction block 1816, selection/accumulator module 1818 and authentication module 1820.In the configuration of Figure 18, securing component 1508A receives the time sequence information of the specific multipath composition of WCDMA signal, and obtains scrambler for it.As determining before, this scrambler is in a plurality of available scramblers in the code group of having discerned of WCDMA signal.
Above-mentioned purpose of description to the preferred embodiments of the present invention is to illustrate for example and describe.These embodiment are not limits, that is to say that the present invention is not subjected to the restriction of disclosed precise forms, under instruction of the present invention or can obtain numerous modifications and variations to these embodiment from the practice of the present invention.Selection and description to embodiment are for principle of the present invention and practical application thereof are made explanations, to enable those skilled in the art to utilizing the present invention in various embodiments and to serve as to cooperate special purpose to carry out various modifications.Scope of the present invention is replaced institute by claim of the present invention and equivalence thereof and is limited.
It is that July 28, application number in 2005 are the priority of 60/703,209 U.S. Provisional Patent Application that the application quotes in full and require the applying date.
Claims (10)
1, a kind of baseband processing module that is used for the Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver is characterized in that, described baseband processing module comprises:
The TX processing section, be connected to the radio-frequency front-end of described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver communicatedly and receive outbound data, handle described outbound data with generation base band TX signal, and export the radio-frequency front-end of described base band TX signal to described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver;
Processor;
Be connected to the memory of described processor communicatedly;
Be connected to the RX interface of the radio-frequency front-end of described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver communicatedly, receive the base band RX signal that carries the WCDMA signal from described radio-frequency front-end; And
Be connected to the cell search device module of described processor and described RX interface communicatedly, described cell search device module is carried out following operation:
Receive described base band RX signal;
Scan the WCDMA energy in the described base band RX signal;
Obtain slot synchronization based on correlation to described WCDMA signal with the primary synchronization channel of described WCDMA signal;
Obtain the frame synchronization of described WCDMA signal and discern the code group of described WCDMA signal based on correlation with the secondary synchronization channel of described WCDMA signal; And
Based on discerning the scrambler of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
2, baseband processing module as claimed in claim 1 is characterized in that, described cell search device module is further based on estimating the signal-to-jamming ratio of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
3, baseband processing module as claimed in claim 1 is characterized in that, described cell search device module further based on and the correlation estimation RF transceiver of the Common Pilot Channel of described WCDMA signal and the frequency offset between the RF reflector.
4, baseband processing module as claimed in claim 1 is characterized in that, described cell search device module is further used for:
Receive about being close to the information of honeycomb from the processor that communicates to connect, comprise the code group of sequential offset information and described contiguous honeycomb;
Based on the correlation of the primary synchronization channel of the WCDMA signal of described contiguous honeycomb, obtain slot synchronization with the WCDMA signal of described contiguous honeycomb;
Based on the correlation of the Common Pilot Channel of the WCDMA signal of described contiguous honeycomb, discern the scrambler and the frame boundaries of the WCDMA signal of described contiguous honeycomb.
5, baseband processing module as claimed in claim 1 is characterized in that, described cell search device module comprises:
First order acquisition module obtains slot synchronization to described WCDMA signal based on the correlation with the primary synchronization channel of described WCDMA signal;
Second level acquisition module obtains frame synchronization to described WCDMA signal based on the correlation with the secondary synchronization channel of described WCDMA signal, and discerns the code group of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
6, a kind of baseband processing module that is used for the Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver is characterized in that, described baseband processing module comprises:
The TX processing section, be connected to the radio-frequency front-end of described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver communicatedly and receive outbound data, handle described outbound data with generation base band TX signal, and export the radio-frequency front-end of described base band TX signal to described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver; Processor;
Be connected to the memory of described processor communicatedly;
Be connected to the RX interface of the radio-frequency front-end of described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver communicatedly, receive the base band RX signal that carries the WCDMA signal from described radio-frequency front-end; And
Be connected to the cell search device module of described processor and described RX interface communicatedly, described cell search device module comprises:
First order acquisition module obtains slot synchronization to described WCDMA signal based on the correlation with the primary synchronization channel of described WCDMA signal;
Second level acquisition module obtains frame synchronization to described WCDMA signal based on the correlation with the secondary synchronization channel of described WCDMA signal, and discerns the code group of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
7, baseband processing module as claimed in claim 6 is characterized in that, described cell search device module is further based on estimating the signal-to-jamming ratio of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
8, baseband processing module as claimed in claim 6 is characterized in that, described cell search device module further based on and the correlation estimation RF transceiver of the Common Pilot Channel of described WCDMA signal and the frequency offset between the RF reflector.
9, a kind of baseband processing module that is used for the Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver is characterized in that, described baseband processing module comprises:
The TX processing section, be connected to the radio-frequency front-end of described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver communicatedly and receive outbound data, handle described outbound data with generation base band TX signal, and export the radio-frequency front-end of described base band TX signal to described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver;
Processor;
Be connected to the memory of described processor communicatedly;
Be connected to the RX interface of the radio-frequency front-end of described Wideband Code Division Multiple Access (WCDMA) radio-frequency (RF) transceiver communicatedly, receive the base band RX signal that carries the WCDMA signal from described radio-frequency front-end; And
Be connected to the cell search device module of described processor and described RX interface communicatedly, described cell search device module comprises:
The configurable first order and second level acquisition module, when being in first configuration, obtain slot synchronization based on correlation to described WCDMA signal with the primary synchronization channel of described WCDMA signal, and be in for second when configuration, obtain the frame synchronization of described WCDMA signal and discern the code group of described WCDMA signal based on correlation with the secondary synchronization channel of described WCDMA signal;
Third level acquisition module is based on discerning the scrambler of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
10, baseband processing module as claimed in claim 9 is characterized in that, described cell search device module is further based on estimating the signal-to-jamming ratio of described WCDMA signal with the correlation of the Common Pilot Channel of described WCDMA signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70320905P | 2005-07-28 | 2005-07-28 | |
| US60/703,209 | 2005-07-28 | ||
| US11/221,145 | 2005-09-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1917705A CN1917705A (en) | 2007-02-21 |
| CN100531440C true CN100531440C (en) | 2009-08-19 |
Family
ID=37738564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101090693A Expired - Fee Related CN100531440C (en) | 2005-07-28 | 2006-07-26 | Baseband processing module for WCDMA radio frequency receiver and transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100531440C (en) |
-
2006
- 2006-07-26 CN CNB2006101090693A patent/CN100531440C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1917705A (en) | 2007-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100726050B1 (en) | Method and apparatus for efficient synchronization in spread spectrum communications | |
| CN1929464B (en) | Baseband processing module for WCDMA RF transceiver | |
| US7894508B2 (en) | WCDMA terminal baseband processing module having cell searcher module | |
| US6078607A (en) | Synchronization codes for use in communication | |
| US7715489B2 (en) | Space time transmit diversity (STTD) decoder within a HSDPA rake receiver | |
| US6377615B1 (en) | Apparatus and methods for receiving information using variable length accumulation searchers | |
| CN1913506B (en) | WCDMA terminal baseband processing module and operation method thereof | |
| EP0848503A3 (en) | CDMA chip synchronization circuit | |
| AU1856399A (en) | Cellular system, mobile portable apparatus, base station apparatus, optimum path detecting method, and apparatus thereof | |
| JP2005522908A (en) | Improved cell detection method and apparatus | |
| EP0854586B1 (en) | Quadrature spread spectrum signal demodulation | |
| EP0853389A2 (en) | Terminal unit using Rake receiver and searching method | |
| US20020131390A1 (en) | Cancellation of non-orthogonal signal in CDMA wireless communications systems | |
| US8031757B2 (en) | Time divided pilot channel detection processing in a WCDMA terminal having a shared memory | |
| JP2007531330A (en) | Method and apparatus for detecting pilot signal with frequency offset using multi-stage correlator | |
| US6731676B2 (en) | Assigning clusters of demodulation elements in a spread spectrum system | |
| KR20030023443A (en) | Receiving unit, receiving method and semiconductor device | |
| CN100531440C (en) | Baseband processing module for WCDMA radio frequency receiver and transmitter | |
| US7756191B2 (en) | Deconvolution searcher for wireless communication system | |
| US7876809B2 (en) | Code division multiple access (CDMA) receiving device, and path searching method | |
| JP2000049754A (en) | Radio equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20140726 |
|
| EXPY | Termination of patent right or utility model |