WO2001099321A1 - Procede d'identification de modeles, dispositif d'identification de modeles, dispositif de recherche et terminal de communication - Google Patents

Procede d'identification de modeles, dispositif d'identification de modeles, dispositif de recherche et terminal de communication Download PDF

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Publication number
WO2001099321A1
WO2001099321A1 PCT/JP2001/005197 JP0105197W WO0199321A1 WO 2001099321 A1 WO2001099321 A1 WO 2001099321A1 JP 0105197 W JP0105197 W JP 0105197W WO 0199321 A1 WO0199321 A1 WO 0199321A1
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WO
WIPO (PCT)
Prior art keywords
signal
types
code
function
spreading
Prior art date
Application number
PCT/JP2001/005197
Other languages
English (en)
Japanese (ja)
Inventor
Masayuki Sano
Shintaro Hirose
Tadahisa Kouyama
Original Assignee
Sanyo Electric Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2000189766A external-priority patent/JP2002009666A/ja
Priority claimed from JP2000286965A external-priority patent/JP3600142B2/ja
Application filed by Sanyo Electric Co., Ltd. filed Critical Sanyo Electric Co., Ltd.
Priority to AU2001274546A priority Critical patent/AU2001274546A1/en
Publication of WO2001099321A1 publication Critical patent/WO2001099321A1/fr

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Classifications

    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70752—Partial correlation

Definitions

  • Pattern discrimination method Description Pattern discrimination method, pattern discrimination device, searcher device, and communication terminal
  • the present invention provides a pattern determination method, a pattern determination device, and a method for calculating a correlation value between a signal including any one of n types of function patterns and a function pattern to identify the function pattern included in the signal.
  • the present invention relates to a searcher device using the same, and a communication terminal. Background art
  • a searcher device that synchronizes with a base station when initial synchronization is established and that identifies a spreading code (detects a code number) from a code group including a plurality of detected spreading codes is known.
  • This searcher device obtains a correlation value between a received signal containing one of a plurality of (e.g., eight) spread codes and the generated plurality (eight) of spread codes.
  • the spread code included in the received signal is identified based on the correlation value.
  • FIG. 11 is a block diagram showing an example of a spread code (pattern) discriminator used in a conventional searcher device.
  • the discriminator includes a correlator block 101, and a code number discriminator 102 for judging a code number from a correlation result of the correlator block 101.
  • a spread code generator 103 for generating a code
  • a correlator 104 for correlating the spread code generated by the spread code generator 103 with a received signal
  • an output of the correlator 104 And an averaging processing unit 105 for averaging the values.
  • FIG. 12 is a diagram illustrating the operation of the above-described determination unit.
  • the spreading code generator 103 generates, for example, one type of spreading code for each frame with respect to a CPICH (Common Pilot Channel) sent from a base station (not shown), performs correlation calculation, and averages them. After repeating this operation sequentially for the eight types of spreading codes, the code number determining section 102 includes, in the received signal, the spreading code for which the largest correlation value was obtained. The code number is determined as the spread code to be used.
  • CPICH Common Pilot Channel
  • FIG. 13 is a block diagram showing another conventional technique, in which, for example, eight correlator blocks 101 shown in FIG. 11 are provided in parallel, and different correlators blocks are simultaneously generated in each correlator block. Correlation operation is performed on eight types of spreading codes and one received signal, for example, one frame, and the code number determination unit 102A outputs the spreading code generated by the correlator block that outputs the largest value. The code determines the code number as the spreading code included in the received signal.
  • the spreading codes are generated one by one with respect to the received signal, and the correlation calculation process is completed for each spreading code.
  • the received signal level became smaller due to faging and the like during the correlation calculation processing for a certain spreading code (for example, C3, C7).
  • a certain spreading code for example, C3, C7.
  • the present invention has been made to solve the above-described problems, and has a simple and compact pattern discriminating method capable of discriminating a spread code with high reliability and being hardly affected by fading or the like.
  • the purpose of the present invention is to provide a determination device, a searcher device, and a communication terminal. Disclosure of the invention
  • the present invention provides a pattern discrimination method in which a correlation value between a signal including any one of n types of function patterns and the function pattern is calculated, and the function pattern included in the signal is identified. Split into lengths and correspondingly The function pattern is divided into predetermined lengths, and a correlation value between the signal and the n types of function patterns is sequentially calculated for each of the divided sections, and the function pattern is determined based on the calculation result. It is characterized by doing so.
  • the present invention also provides a pattern discriminating apparatus which calculates a correlation value between a signal including any one of n types of function patterns and the function pattern to identify a function pattern included in the signal.
  • a function pattern generator that generates n types of function patterns, a correlator that receives an input signal and a function pattern generated by the function pattern generator, and calculates a correlation value thereof;
  • a controller for switching the n types of function patterns generated by the function pattern generator for each predetermined length of the signal, adjusting a phase, and inputting the phase to the correlator. is there.
  • each calculation when calculating a correlation value for a plurality of function patterns, each calculation can be performed in a time-dispersed manner, and the effect of noise or the like that occurs temporarily can be reduced.
  • a pattern discrimination device that can increase the reliability of pattern discrimination against the influence of noise or the like that occurs over time.
  • the present invention provides a searcher that synchronizes with a base station when initial synchronization is established, and that identifies the spreading code from a code group including any of the detected n types of spreading codes.
  • a searcher device configured to identify the spread code
  • a spread code generator that generates the n types of spread codes, an input received signal and a spread code generated by the spread code generator are input, and a correlation value of these is input.
  • the n types of spreading codes generated by the spreading code generator are switched for each predetermined number of symbols of the received signal, and the phase is adjusted and input to the correlator.
  • a controller for controlling the operation for controlling the operation.
  • the spread code generator is configured by a feedback shift register, and the controller resets an initial value of the feedback shift register, thereby setting the spread code. Switching is performed for each predetermined number of symbols and the phase is adjusted. According to such a configuration, switching of the spreading code for each section length of the received signal can be performed extremely easily. it can.
  • the spread code generator is constituted by a feed-pack shift register, and the controller stops the shift of the feedback shift register over a predetermined number of bits.
  • the spread code is switched and the phase is adjusted. Even with such a configuration, the spread code can be switched very easily.
  • the present invention is also a communication terminal including a baseband unit, an RF unit, and an antenna, wherein the baseband unit includes a transmission unit and a reception unit, and the reception unit includes a base station when initial synchronization is established.
  • a searcher device that synchronizes with a station and identifies the spreading code from a code group that includes any of the detected n types of spreading codes, and a received signal that includes any of the n types of spreading codes.
  • a search device that calculates a correlation value with the n types of spreading codes and identifies a spreading code included in the signal based on the correlation result; and the searcher device includes the n types of spreading codes.
  • a spread code generator for generating a spread code, a correlator for receiving the input received signal and the spread code generated by the spread code generator, and calculating a correlation value between them;
  • a controller for switching the n kinds of spread codes generated by the spread code generator for each predetermined number of symbols of the received signal, adjusting a phase, and inputting the phase to the correlator. Things.
  • the communication terminal is a portable terminal, and is excellent in reliability of establishment of initial synchronization and capable of achieving compactness and simplicity essential for carrying. Terminal can be obtained.
  • the present invention provides a pattern discriminating method for calculating a correlation value between a signal including any one of n types of function patterns and the function pattern to identify a function pattern included in the signal.
  • a signal including any one of the n types of function patterns and another predetermined signal that occurs periodically are mixed, the signal including any one of the n types of function patterns is used as the other predetermined signal.
  • the signal While periodically removing the period in which the signals are mixed, the signal is divided into predetermined lengths, and the function pattern is correspondingly divided into predetermined lengths, and for each of the divided sections, A correlation value between the signal and the n types of function patterns is sequentially calculated, and the function pattern is determined based on the calculation result.
  • each of the calculations when calculating a correlation value for a plurality of function patterns, each of the calculations can be performed in a time-dispersed manner, and noise such as temporarily generated noise and periodically generated noise can be obtained.
  • the influence can be reduced, and thus the reliability of pattern discrimination against the influence of noise or the like occurring temporally can be increased in a simple configuration without performing parallel processing or the like.
  • the present invention provides a pattern discriminating apparatus which calculates a correlation value between a signal including any one of n types of function patterns and the function pattern to identify a function pattern included in the signal.
  • a function pattern generator that generates the n types of function patterns, a correlator that receives the input signal and the function pattern generated by the function pattern generator, and calculates a correlation value between them.
  • the signal that includes any of the n types of function patterns is used as the other predetermined signal.
  • a signal including any one of the n types of function patterns is switched at predetermined intervals and input to the correlator, and the function pattern is And a controller for switching n types of function patterns generated by the generator for each predetermined length of the signal, adjusting a phase, and inputting the phase to the correlator.
  • the present invention is a searcher apparatus that synchronizes with a base station when initial synchronization is established, and that identifies the spreading code from a code group including any of the detected n types of spreading codes.
  • a calculation unit that calculates a correlation value between a received signal including any of the n types of spreading codes and the n types of spreading codes, and identifies a spreading code included in the signal based on the correlation result.
  • a spreading code generator for generating the n kinds of spreading codes; an input received signal and a spreading code generated by the spreading code generator; And a correlator that calculates any one of the n types of spreading codes, and a signal including any one of the n types of spreading codes, if the other predetermined signal that occurs periodically is mixed, From the signal While periodically deleting a period in which other predetermined signals are mixed, a signal including any one of the n types of spreading codes is switched every predetermined number of symbols and input to the correlator, and the spreading is performed.
  • a controller for switching the n kinds of spread codes generated by the code generator for each predetermined number of symbols of the received signal, adjusting a phase, and inputting the phase to the correlator. .
  • fading at the time of initial synchronization establishment is less likely to cause erroneous identification of a code number even if it is affected by noise or the like due to other channel signals transmitted periodically.
  • a searcher device that can increase the reliability against fading.
  • the spread code generator is configured by a feedback shift register, and the controller resets an initial value of the feedback shift register, thereby setting the spread code to a predetermined value. Switching is performed for each symbol number and the phase is adjusted. According to this configuration, switching of the spreading code for each section length of the received signal can be performed very easily.
  • the spread code generator is constituted by a feedback shift register, and the controller shifts an initial setting spread code number of the feedback shift register over a predetermined number of bits.
  • the spread code is switched and the phase is adjusted, and the spread code can be switched very easily even with such a configuration.
  • the present invention is a communication terminal including a baseband unit, an RF unit, and an antenna, wherein the baseband unit includes a transmission unit and a reception unit, and the reception unit is a base station when initial synchronization is established.
  • a searcher device for identifying the spreading code from a code group including any of the detected n types of spreading codes, wherein the received signal includes any of the n types of spreading codes.
  • a correlation value between the n types of spreading codes and a searcher device configured to identify a diffusion code included in the signal based on a result of the correlation.
  • a spread code generator that generates a spread code of the following, a correlator that receives the input received signal and the spread code generated by the spread code generator, and calculates a correlation value between them;
  • another predetermined signal that occurs periodically is mixed with a signal that includes any of the n types of spreading codes
  • the other predetermined signal is converted from the signal that includes any of the n types of spreading codes.
  • a signal including any of the n types of spread codes is switched every predetermined number of symbols and input to the correlator, and generated by the spread code generator.
  • a controller for switching the n types of spreading codes for each predetermined number of symbols of the received signal, adjusting the phase, and inputting the adjusted code to the correlator.
  • the communication terminal is a mobile terminal. It is a feature of the present invention, and it is possible to obtain a portable terminal which is excellent in reliability of establishment of initial synchronization and which can achieve small simplicity essential for carrying.
  • the other predetermined signal periodically generated is a synchronization channel signal at the time of transmission diversity, and is not affected by the synchronization channel signal.
  • a mobile terminal used in a DS-CDMA (Direct Spread Code Division Multiple Access) cellular communication system that can establish initial synchronization with high reliability.
  • FIG. 1 is a block diagram showing a portable terminal according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing a baseband unit of the mobile terminal.
  • FIG. 3 is a block diagram showing a configuration of a receiving unit.
  • FIG. 4 is a block diagram showing a searcher.
  • FIG. 5 is a diagram showing a received signal.
  • FIG. 6 is a diagram showing a frame format of CPICH.
  • FIG. 7 is a block diagram showing a configuration of a code number detection unit.
  • FIG. 8 is a block diagram showing a register of the spread code generation unit.
  • FIG. 9 is an explanatory diagram showing a code number detecting operation according to the first embodiment.
  • FIG. 10 is an explanatory diagram showing a code number detecting operation according to the second embodiment.
  • FIG. 11 is a block diagram showing a code number detecting section according to the prior art.
  • FIG. 12 is a diagram showing the operation of the conventional technique.
  • FIG. 13 is a block diagram showing an example of another conventional technique.
  • FIG. 14 is a diagram showing the problems of the conventional technology.
  • FIG. 15 is a diagram showing a configuration of a physical channel in the 3GPP specification.
  • FIG. 16 is a diagram illustrating the operation of transmission diversity.
  • FIG. 17 is an explanatory diagram showing an example of a received signal (3GPP specification) at the time of transmission diversity.
  • FIG. 18 is an explanatory diagram showing another example of a received signal at the time of transmission diversity.
  • FIG. 1 is a block diagram showing the overall configuration of the mobile terminal. This mobile terminal is connected to a transmission / reception antenna 1 and a transmission / reception antenna 1, and mixes a transmission baseband signal with a carrier wave and performs quadrature modulation to transmit the signal from the antenna 1.
  • An RF section 2 for obtaining a band signal, and connected to the RF section 2 to spread-modulate the baseband signal and deliver it to the RF section 2 as a transmission baseband signal, or a received baseband signal passed from the RF section 2
  • the baseband unit 3 that performs despread demodulation and performs error correction processing to obtain a speech codeword
  • the control unit (CPU) 4 that is connected to the baseband unit 3 and performs various controls
  • the baseband unit 3 The audio signal input from the connected microphone is encoded and delivered to the baseband unit 3, or the audio codeword delivered from the baseband unit 3 is converted into an analog audio signal and sent to the speaker. And a speech codec 5 for force.
  • FIG. 2 is a block diagram showing the baseband unit shown in FIG. 1 in detail.
  • the baseband unit 3 includes a C-DMA modem 30 for performing modulation / demodulation (spreading / despreading), a channel codec 31 for performing error correction and the like, and a DP-RAM (Dual Port RAM) 3 2, 3 3, D / A converter 3 4 that converts digital signals from C DMA modem 30 to analog signals and outputs them to RF section 2, and analog signals from RF section 2 And an AZD converter 35 which converts the digital signal into a digital signal and inputs the digital signal to the C DMA modem 30.
  • DP-RAM Digital Port RAM
  • the C-DMA modem 30 receives as input the frame-coded sound code data from the output side of the channel codec 31 via the DP-RAM 32, and uses the data as a transmission baseband signal, as a D / A converter 3
  • a transmission unit 301 that outputs a transmission signal via a transmission line 4 and a reception baseband signal are input via an AZD converter 35, which despreads the signal and demodulates it into a baseband signal, which is converted to a DP—RAM 3 3 is connected to the channel codec 3 1 via the And a timing generator 304 for forming timing pulses.
  • FIG. 3 is a detailed block diagram of the receiving unit 302 shown in FIG. 2.
  • the receiving unit 302 includes an AGC 3021 that performs automatic gain control so as to obtain a constant gain, AFC 30 that performs automatic frequency control based on the carrier frequency from the base station
  • a RAKE unit 3023 for demodulating and combining various received signals to obtain received signals, a cell search process for establishing initial synchronization, slot synchronization and frame synchronization, and a spreading code (Searcher device of the present invention) 3024 for detecting a code group of (scramble code) and further detecting a code number from the code group (identifying a spread code), the above-described sequence controller 303 and timing generator 304 And
  • the RAKE unit 3023 includes a plurality of finger units that perform despreading according to each path.
  • a RAKE combiner 30232 that combines the baseband signals obtained in the respective finger units, and a radio frame processing circuit 30233 that performs frame processing based on the output of the RAKE combiner.
  • FIG. 4 is a block diagram showing a searcher in detail
  • FIG. 5 is a time chart showing slots (Primary-SCH, SecondarySCH) detected by the searcher
  • FIG. 6 is used for detecting a spreading code.
  • FIG. 3 is a diagram showing a frame format indicating a CP I CH (common pilot channel).
  • CPCH Primary Common Control Physical Channel
  • PCCPCH Primary Common Control Physical Channel
  • Primary-SCH Synchroms Control Physical Channel
  • c shows
  • the first one symbol (256 ch 0 ps) of each slot is off transmission, and during that period, the Primary-SCH and Secondary-SCH shown in (b) and (c), which are handled by the searcher, are transmitted. .
  • the Primary-SCH shown in (b) is a channel for initial synchronization (slot synchronization), has 256 chips, and has a code common to all cells.
  • the Secondary-SCH shown in is a channel for group identification, which is a spreading code (scrambling code). Like the Primary-SCH, it has 2 5 6 chips Z slots, but there are 16 types of codes. Yes, this is changed appropriately for each slot, and the combination corresponds to the scramble code group.
  • the frame shown in FIG. 6 has a fixed length of 10 msec and is divided into 15 slots.
  • the number is 384 O chip per frame (256 O chip per slot).
  • CPICH is expressed in units of one symbol with 256 chips, so that ten symbols are stored per slot.
  • the searcher shown in FIG. 4 has a matched filter section 302 to which a received signal is inputted, a path search section 302 connected to the matched filter section, and a code filter to which the received signal is inputted. It is configured to include a loop detecting section 302 4 3 and a code number detecting section 302 4 4 connected to the code loop detecting section. Both the path information detected by the path search unit and the code number detected by the code number detection unit are input to the sequence controller 303 and used for communication control after the initial synchronization is established.
  • the searcher first detects the slot timing indicated in the Primary-SCH to establish the initial synchronization. This slot evening is detected by averaging the pulse positions obtained by the matched filter by a path search.
  • the code group detection unit identifies each pattern (16 types) of each slot (S 1 to S 15) in the Secondary-SCH, and based on the arrangement of these patterns, In addition to synchronizing the frame (detecting the beginning of the frame), it also detects the code (scramble code) group.
  • One code group contains eight types of spreading codes, and when a code group is detected, the code number detector is included in CPICH from among the eight types of spreading codes. Identify code and detect code number.
  • the identification (determination) of the code number is performed by dividing the signal including the spreading code into a predetermined length and, correspondingly, dividing the spreading code (function pattern) into a predetermined length. And for each of the divided sections, the signal and the eight types Are sequentially calculated, and the spread code is determined based on the calculation result.
  • FIG. 7 is a block diagram showing a configuration of a code number detecting unit according to the present embodiment.
  • the code number is detected from the maximum value by performing averaging processing over a period of two frames while sequentially switching the code number (spreading code) every two symbol periods in the slot constituting the CPICH. .
  • the scramble code number detector shown in FIG. 7 includes a spread code generator 71 that generates a different spread code for every two symbols, and a correlator 72 that calculates a correlation value between the received signal and the spread code.
  • An averaging section 74 for averaging the output of the correlator 72, a switch section 73 for switching the averaging section 74 for every two symbols and connecting to the output of the correlator 72,
  • a code number specifying unit 75 for comparing the correlation level from the output of the averaging unit 74 and specifying a code number based on the output of the averaging unit 74 that outputs the largest value, and a spreading code generating unit 7 1
  • a control unit 76 for performing switch control of the switch unit 73 and the like.
  • FIG. 8 shows a feedback shift register used in the spreading code generation unit 71
  • FIG. 9 is an explanatory diagram showing the operation of the code number detection unit.
  • the shift register is composed of two stages, upper and lower, and the values from the predetermined number of elements in the upper and lower shift registers are exclusive-ORed and fed back, and the values from the predetermined number of elements are exclusive logical as appropriate. The sums are taken and output as the Q component spread code.
  • processing is started by inputting a code number detection start signal to the control section 76 at the beginning of the frame, and the initial value corresponding to the spreading code number C 1 is set at the beginning of the frame at the spreading code generating section 7. Loaded to 1 and spreading code generation is started.
  • the spread code (S (1)) corresponding to the spread code number C1 is continuously generated, and the result of the correlation operation between the generated code and the received signal is the first stage of the averaging circuit 74. Is input to and added Z is accumulated.
  • the initial value corresponding to the next code number (C 2) is loaded into the spreading code generator at the beginning of the third symbol, and the averaging processing unit 74 is switched to 2 by the switch unit 73. Switch to the stage and perform the correlation Add the calculation result and accumulate Z.
  • the initial value loaded at the beginning of the third symbol is the state of the shift register when two symbols (512 chips) have elapsed from the beginning of the frame of the spreading code sequence corresponding to the code number C2.
  • the averaging process is repeated while sequentially switching the code numbers in the same procedure.
  • the ninth symbol and the tenth symbol of each slot are not processed. This is because the number of symbols to be detected is eight for the number of symbols per slot, so that the time is adjusted so that the whole detection process can be finished after two well-coordinated frames. It was just because we did it.
  • the code number switching cycle is 2 symbols and the total averaging time is 2 frames. However, it is needless to say that this is merely an example. In this way, by performing processing while switching code numbers in a short cycle, when the entire detection processing is viewed, processing can be performed in a state similar to the parallel processing shown in Fig. 13 and code number detection is performed. Can be.
  • the initial value to be loaded into the spread code generator may be calculated and stored in advance for each code and for each switching timing. Calculating the value and storing it in memory makes the computational effort and the size of the storage circuit not negligible.
  • the embodiment of the present invention employs the following method.
  • the spreading code Principal Scrambling Code
  • the spreading code generator is used at the beginning (initial value) of the frame.
  • the shift register pattern is set as follows.
  • the initial value is a state in which only the upper shift register has performed the shift operation 16 times (for 16 chips) from the above state.
  • the code numbers included in a certain code group are consecutive numbers such as 0 to 7, 8 to 15,. Therefore, at the code switching timing shown in FIG. 9, it is possible to automatically calculate the initial value for the next code number by performing a shift operation for 16 chips at a time for the upper shift register. Become. In the case of Fig.
  • the input of each stage of the upper shift register may be forcibly changed and set in accordance with the above equation at the moment when the code number is switched.
  • shift once from the state of the code number switching timing (the last chip timing of the even symbol in Fig. 9) (shift to the first chip timing of the next symbol) +16 shifts
  • shift once from the state of the code number switching timing (the last chip timing of the even symbol in Fig. 9) (shift to the first chip timing of the next symbol) +16 shifts
  • each stage of the upper shift register may be switched in accordance with the above equation at the moment when the state of the last chip of the even symbol is shifted to the beginning timing of the next symbol. Should be provided).
  • the correlation value between the signal including any one of the n types of function patterns and the function pattern is calculated, and when identifying the function pattern included in the signal, the signal is determined by a predetermined value.
  • the function pattern is divided into predetermined lengths, and for each of the divided sections, the correlation value between the signal and the n types of function patterns is sequentially calculated. Since the function pattern is determined based on the calculation result, a pattern determination method that is simple and small, is not easily affected by fogging or the like, and can determine a spread code with high reliability. It is possible to provide a pattern discriminating device, a searching device, and a communication terminal.
  • Embodiment 2 Embodiment 2.
  • the received signal is divided into predetermined lengths
  • the spreading code is correspondingly divided into predetermined lengths
  • the received signal is divided into a plurality of types of spread codes for each of the divided sections.
  • the correlation value with the code is sequentially calculated, and the spread code is determined based on the calculation result.
  • the second embodiment when a signal including any one of n types of function patterns in a received signal and another predetermined signal that occurs periodically are mixed, a period in which the other predetermined signal is mixed Is periodically deleted, thereby enabling the spread code to be determined with high reliability even in transmission diversity.
  • a signal including any one of n types of function patterns in a received signal and another predetermined signal that occurs periodically are mixed, a period in which the other predetermined signal is mixed Is periodically deleted, thereby enabling the spread code to be determined with high reliability even in transmission diversity.
  • FIG. 15 is a diagram for explaining the configuration of a physical channel, and is a diagram showing the configuration of a physical channel in the 3GPP (3rd Generatio nPartition Prtne r sipipProject) specification.
  • (1a) shows the signal of the scramble code (Scramb1ngCord) in the CPICH, and (1b) shows the signal of the channelization code (ChannelzionCode) in the CPICH.
  • (1c) shows a signal of a scrambling code in PCCPCH (Primary Common Control Phy sic a lCalChanne 1), and (Id) shows a signal of a channelization code in PCCPCH.
  • PCCPCH Primary Common Control Phy sic a lCalChanne 1
  • Id shows a signal of a channelization code in PCCPCH.
  • (1e) shows the signal of the channelization code in CH (Synchr on iz ati on Chanel).
  • a normal channel is multiplied by a scramble code and a channelization code, but since SCH has no scramble code, a correlation value can be obtained only by the channelization code.
  • Transmit diversity is a method of transmitting different signals from different antennas of the same base station (cell).
  • FIG. 16 is a diagram showing the operation of transmission diversity.
  • the signals from ANT1 and ⁇ 2 are received in a multiplexed form, the signal for each antenna is separated from the received signal and only the necessary signals are extracted.
  • transmission diversity is used, an antenna-diversity effect can be obtained even with a single mobile terminal antenna. That is, there is a merit that the configuration of the mobile terminal can be simplified.
  • FIG. 17 is an explanatory diagram showing a received signal (3GPP specification) at the time of transmission diversity.
  • (2a) shows the ANT1 CPICH
  • (2b) shows the ANT2 CPICH
  • (2c) shows the ANT1 PCCPCH
  • (2d) shows the ANT2 PCCPCH
  • 2e) shows the SCH of ANT1
  • (2f) shows the SCH of ANT2.
  • Normal P.CCPCH transmits a pattern with different encoding for each antenna.
  • the SCH switches the transmitting antenna for each slot.
  • special coding (such as bit replacement) is performed in units of two symbols on the transmitting side, and decoding is performed in units of two symbols on the receiving side.
  • FIG. 18 is an explanatory diagram showing another example of a received signal at the time of transmission diversity.
  • no signal arrives from ANT 2 as shown in Fig. 18 only the first symbol of the slot receives a different channel than other symbols, and the same first symbol differs for each slot.
  • the first symbol in the slot is noise when viewed from the CPI CH.
  • the correlation calculation is performed while excluding the first symbol in each slot, and the second symbol is also excluded during transmission diversity in order to perform decoding processing in units of two symbols. It is like that.
  • Embodiment 2 the configurations in FIGS. 1 to 8 described in Embodiment 1 are the same.
  • the operation of the second embodiment different from that of the first embodiment will be mainly described with reference to FIG.
  • FIG. 10 illustrates a code number detecting operation according to the second embodiment.
  • the process is started by inputting a code number detection start signal to the control unit 76 at the beginning of the frame.
  • the correlation calculation processing is not performed on the first symbol and the second symbol of each slot.
  • an initial value corresponding to the spreading code C 1 is loaded into the spreading code generation unit 71 in accordance with the third symbol, and generation of the spreading code is started.
  • the spread code S (1) corresponding to the code number C1 continues to be generated, and the result of the correlation operation between the generated code and the received signal is input to the first stage of the averaging unit 74. Added / accumulated.
  • the initial value corresponding to the next code number C 2 at the beginning of the 5th symbol is sent to the diffusion code generation unit 71 and averaged by the switch units 7 and 3.
  • the processing unit 74 is switched to the second stage to add / accumulate the correlation calculation result.
  • the initial value loaded at the beginning of the fifth symbol is the shift register value at the time when the spreading code sequence corresponding to the code number C2 has passed for four symbols (10 24 chi ⁇ ) from the beginning of the frame. State.
  • the averaging process is repeated while sequentially switching the code numbers in the same procedure. However, since these operations are the same as those described in the first embodiment, description thereof will be omitted.
  • the n types of functions While periodically removing the period in which the other predetermined signal is mixed from the signal including any of the patterns, the signal is divided into predetermined lengths, and the function pattern is correspondingly divided into predetermined lengths.
  • the correlation value between the signal and the n types of function patterns is sequentially calculated, and the function pattern is determined based on the calculation result.
  • the spread code can be determined with high reliability even when other predetermined signals that occur periodically are mixed. The effect of improving effect becomes higher when the cormorants.
  • the present invention can be applied to a mobile terminal or a communication system using another system. It goes without saying that the present invention can also be applied to general pattern discrimination under a state where noise is generated with a bias in time.
  • the initial value for the spreading code C1 is loaded in accordance with the third symbol is described, but another method may be used.
  • the code corresponding to the one before the spreading code C1 (for example, CO) is loaded as the initial value at the beginning of the frame, and the correlation calculation is not performed during the first to third symbol periods, but the spreading code is not executed.
  • a spread code sequence similar to that described in the present embodiment can be realized at the start of the third symbol.

Abstract

L'invention concerne un procédé d'identification de modèles destiné à calculer la valeur de corrélation entre un signal contenant n'importe lequel de n types de modèles de fonction et un modèle de fonction de manière à identifier le modèle de fonction contenu dans le signal. Ce procédé consiste à diviser le signal en une partie de longueur prédéterminée et, de ce fait, à diviser le modèle de fonction en fragments de longueur prédéterminée, puis à calculer les valeurs de corrélation de manière séquentielle entre le signal et les modèles de fonction des n types de façon à identifier le modèle de fonction sur la base du résultat de ce calcul. En conséquence, on peut identifier un code d'étalement simplement à l'aide d'une unité de petite taille avec une haute fiabilité, ce code étant à peine influencé par l'évanouissement, par exemple.
PCT/JP2001/005197 2000-06-23 2001-06-19 Procede d'identification de modeles, dispositif d'identification de modeles, dispositif de recherche et terminal de communication WO2001099321A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001274546A AU2001274546A1 (en) 2000-06-23 2001-06-19 Pattern identifying method, pattern identifying device, searcher device, and communication terminal

Applications Claiming Priority (4)

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JP2000189766A JP2002009666A (ja) 2000-06-23 2000-06-23 パターンの判別方法、パターンの判別装置、サーチャー装置、及び通信端末
JP2000-189766 2000-06-23
JP2000286965A JP3600142B2 (ja) 2000-09-21 2000-09-21 パターンの判別方法、パターンの判別装置、サーチャー装置、及び通信端末
JP2000-286965 2000-09-21

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US8892703B2 (en) 2006-03-31 2014-11-18 International Business Machines Corporation Cross-cutting event correlation

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JPH10200447A (ja) * 1997-01-07 1998-07-31 Yozan:Kk Ｄｓ−ｃｄｍａ基地局間非同期セルラ方式における初期同期方法および受信機
JPH1188295A (ja) * 1997-07-17 1999-03-30 Matsushita Electric Ind Co Ltd Ｃｄｍａ無線通信装置
JPH11205864A (ja) * 1998-01-14 1999-07-30 Yozan Inc Ｄｓ−ｃｄｍａ基地局間非同期セルラ方式におけるロングコードサーチ方法
JP2000134181A (ja) * 1998-10-23 2000-05-12 Hitachi Ltd 符号分割多元接続方式移動通信システムにおける通信装置
JP2000138615A (ja) * 1998-10-30 2000-05-16 Matsushita Electric Ind Co Ltd 同期捕捉装置及び同期捕捉方法
JP2000138657A (ja) * 1998-08-28 2000-05-16 Matsushita Electric Ind Co Ltd 同期捕捉装置および同期捕捉方法

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Publication number Priority date Publication date Assignee Title
JPH10200447A (ja) * 1997-01-07 1998-07-31 Yozan:Kk Ｄｓ−ｃｄｍａ基地局間非同期セルラ方式における初期同期方法および受信機
JPH1188295A (ja) * 1997-07-17 1999-03-30 Matsushita Electric Ind Co Ltd Ｃｄｍａ無線通信装置
JPH11205864A (ja) * 1998-01-14 1999-07-30 Yozan Inc Ｄｓ−ｃｄｍａ基地局間非同期セルラ方式におけるロングコードサーチ方法
JP2000138657A (ja) * 1998-08-28 2000-05-16 Matsushita Electric Ind Co Ltd 同期捕捉装置および同期捕捉方法
JP2000134181A (ja) * 1998-10-23 2000-05-12 Hitachi Ltd 符号分割多元接続方式移動通信システムにおける通信装置
JP2000138615A (ja) * 1998-10-30 2000-05-16 Matsushita Electric Ind Co Ltd 同期捕捉装置及び同期捕捉方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8892703B2 (en) 2006-03-31 2014-11-18 International Business Machines Corporation Cross-cutting event correlation
US9210057B2 (en) 2006-03-31 2015-12-08 International Business Machines Corporation Cross-cutting event correlation

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