WO2008141476A1 - Méthode de détection d'un rapport signal/bruit - Google Patents

Méthode de détection d'un rapport signal/bruit Download PDF

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Publication number
WO2008141476A1
WO2008141476A1 PCT/CN2007/001626 CN2007001626W WO2008141476A1 WO 2008141476 A1 WO2008141476 A1 WO 2008141476A1 CN 2007001626 W CN2007001626 W CN 2007001626W WO 2008141476 A1 WO2008141476 A1 WO 2008141476A1
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WO
WIPO (PCT)
Prior art keywords
dpcch
channel
physical control
dedicated physical
control channel
Prior art date
Application number
PCT/CN2007/001626
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English (en)
Chinese (zh)
Inventor
Li Liu
Original Assignee
Zte Corporation
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
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2007/001626 priority Critical patent/WO2008141476A1/fr
Publication of WO2008141476A1 publication Critical patent/WO2008141476A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Definitions

  • the present invention relates to a High Speed Uplink Packet Access (HSUPA) and a High Speed Downlink Packet Access (HSDPA), and in particular to an enhanced HSUPA system.
  • Dedicated Physical Control Channel E-DCH Dedicated Physical Control Channel, E-DPCCH
  • E-DPCCH Uplink dedicated Physical control channel
  • HS-DPCCH Uplink dedicated Physical control channel
  • E-DPCCH In the Wideband Code Division Multiple Access (WCDMA) mobile communication system, after the introduction of high-speed uplink packet access HSUPA, the detection of the physical channel E-DPCCH becomes an important component of the system operation.
  • the detection of the E-DPCCH channel includes two aspects: false alarm detection and miss detection detection.
  • the false alarm of E-DPCCH will cause unnecessary transmission of downlink E-HICH, which will affect the downlink capacity.
  • the missed detection of E-DPCCH will cause unnecessary retransmission and affect the throughput of the system. Therefore, the detection of false alarms and missed detection of E-DPCCH is very important.
  • the base station Node B in order to obtain the false alarm probability and the missed detection probability of the E-DPCCH, the base station Node B needs to detect the energy of the E-DPCCH at the receiving end, and only the received E-DPCCH channel energy is greater than a certain threshold. It is considered that the E-DPCCH is detected, otherwise the E-DPCCH is considered not to be transmitted.
  • the HS-DPCCH channel is also required to be detected in the HSDPA system.
  • the HS-DPCCH channel detection also includes false alarm detection and miss detection detection.
  • the Node B detects the energy of the HS-DPCCH at the receiving end, it is considered that only the received HS-DPCCH channel energy is greater than a certain threshold, and the HS-DPCCH is considered to be detected. Otherwise, the HS-DPCCH is considered. Not sent.
  • the Signal Interference Ratio can be used as the energy detection parameter of the channel.
  • Each transmission time interval in the HSUPA system Transmission Time Interval, Jane
  • Each ⁇ ⁇ or HSDPA system measures an SIR value and compares it with the SIR threshold SIR Th set in the program: If SIR>SIR Th , the channel is considered to be detected, otherwise the channel is considered not detected. . Therefore, the accuracy of the SIR and HS-DPCCH SIR measurements of the E-DPCCH plays an important role in the detection of the E-DPCCH channel and the detection of the HS-DPCCH channel, respectively. If the SIR measurement of the SIR /HS-DPCCH of the E-DPCCH is inaccurate, it will directly affect the false alarm and miss detection performance of the E-DPCCH/HS-DPCCH.
  • the SIR method of the E-DPCCH proposed by the R4AH-05060 proposal of the 3GPP organization is:
  • N 30, the number of encoded E-DPCCH symbols
  • E-DPCCH channel coded output denoted by 1 and -1, a total of N symbols
  • z[n] £ c -r, [ «]
  • z[n] is the RAKE receiver after multipath combining E-DPCCH signal output, where is the despreading and descrambling output of the kth path, and Finger is the path number of the RAKE receiver;
  • M 10, the number of encoded HS-DPCCH symbols
  • z[n] HS-DPCCH signal output after multipath combining of RAKE receiver, where is the despreading and descrambling output of the kth path, Finger is the path number of the RAKE receiver; c Channel estimation of the kth path Value
  • the technical problem to be solved by the present invention is to provide a signal-to-interference ratio detection to obtain an E-DCH Dedicated Physical Control Channel (E-DPCCH) in an HSUPA system, and a high-speed downlink in an HSDPA system.
  • E-DPCCH E-DCH Dedicated Physical Control Channel
  • uplink uplink
  • HS-DSCH HS-DPCCH for short
  • the present invention first provides an enhanced dedicated physical control channel signal to interference ratio detection method, which is applied to a high speed uplink packet access system, and includes the following steps:
  • the distribution characteristics of the noise on each channel in the step (1) may include the symmetry of the distribution of the noise on each channel.
  • step (3) the enhanced dedicated physical control channel symbol of each multipath can be channeled according to the channel estimation value c k Compensation and multipath combining yield the output sequence.
  • step (5) can obtain the signal to interference ratio according to the following expression:
  • the present invention further provides an uplink dedicated physical control channel signal to interference ratio detection method for a high speed downlink shared channel, which is applied to a high speed downlink packet access system, and includes the following steps:
  • the distribution characteristics of the noise on each channel in step (1) may include the noise distributed on each channel. symmetry.
  • the uplink dedicated physical control channel signal to interference ratio detection method of the high speed downlink shared channel may include: the high speed downlink sharing of each multipath according to the channel estimation value.
  • the uplink dedicated physical control channel symbols of the channel perform channel compensation and multipath combining to obtain the output sequence.
  • the step (5) can obtain the signal to interference ratio according to the following expression:
  • the method of the present invention removes the noise components introduced in the above two proposals, thereby The influence of noise components is reduced, and more accurate SIR results are obtained, which improves the false alarm detection performance of E-DPCCH/HS-DPCCH.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for detecting an E-DPCCH/HS-DPCCH channel signal to interference ratio according to the present invention
  • the idea of the present invention is to remove the noise component introduced during the estimation of the signal energy, and to correct the E-DPCCH signal-to-interference ratio method proposed by the proposal R4AH-05060 and the HS-DPCCH signal-to-interference ratio method proposed by the proposal R4-030928. Therefore, the SIR measurement value used when detecting the E-DPCCH/HS-DPCCH channel is relatively accurate. '
  • R k is the fading of each path, and L is the number of multipaths
  • Wi is the noise introduced by the I path
  • D ⁇ p . . h is the pure symbol of the E-DPCCH transmitted by the UE.
  • the E-DPCCH signal-to-interference ratio method proposed by the proposal R4AH-05060 does not process the introduced noise component ⁇ 2 accordingly, so that the deviation of the SIR estimation value is large.
  • the method of HS-DPCCH signal-to-interference ratio proposed in the proposal R4-030928 does not correspondingly process the introduced noise components. Therefore, the noise component introduced in the process of estimating the signal energy is removed, and the SIR measurement value of the E-DPCCH/HS-DPCCH channel which is more accurate than the above two proposals is obtained.
  • Figure 1 is a diagram showing the flow of an embodiment of the present invention for obtaining an E-DPCCH/HS-DPCCH signal to interference ratio, including the following steps:
  • Step 101 Obtain noise energy P s in each DPCCH symbol according to a dedicated physical control channel DPCCH pilot symbol in the HSUPA/HSDPA system, and obtain each E-DPCCH/HS-DPCCH according to the symmetry of noise distribution on each channel.
  • the noise energy in the symbol is recorded as
  • Step 102 Estimate the E-DPCCH/HS-DPCCH channel by using the DPCCH symbol of each path on the RAKE receiver to obtain a channel estimation value e k for each symbol of each path.
  • Step 103 Perform channel compensation and multipath combining on each multipath E-DPCCH/HS-DPCCH symbol according to the obtained channel estimation value e k to obtain a multipath combined E-DPCCH/HS-DPCCH signal of the RAKE receiver. Output sequence.
  • Step 104 For the E-DPCCH channel, traverse all the 1024 code words encoded by the E-DPCCH, and perform related operations on the code words respectively to obtain the maximum correlation value. Dish. impart.( )] ; For the HS-DPCCH channel, perform an averaging operation on the sequence to get tired
  • Step 105 Using the information obtained in the above four steps, according to the following expression (5) and expression (6), the corresponding E-DPCCH/HS-DPCCH signal-to-interference ratio measurement after noise removal can be respectively obtained. The value is up.
  • the noise removed is the noise contained in the real part of the E-DPCCH signal on the three slot slots (the time domain corresponding to one E-DPCCH codeword is 3 slots), which is recorded as
  • ⁇ _R_E-DPCCH_3slo. and its value is equal to the noise power P N per chip. Ise is multiplied by the spreading factor of E-DPCCH and then divided by twice the number of encoded E-DPCCH symbols N, ie
  • the noise contained in the imaginary part of the HS-DPCCH signal is denoted as w n_ HS - DPCCH _ lsl . t , and its value is equal to the noise power per chip ⁇ multiplied by the spreading factor of HS-DPCCH and then divided by twice the coded
  • the E-DPCCH signal-to-interference ratio method proposed by R4AH-05060 is compared with the SIR method modified by the present invention.
  • the comparison result is that the leakage detection performance of the E-DPCCH signal-to-interference ratio method proposed by the present invention is improved by l.ldB at the same probability of missed detection (0.2%).
  • the detailed comparison results are shown in Figure 2. Taking HS-DPCCH as an example, in the dual antenna, AWGN environment, the HS-DPCCH signal-to-interference ratio method proposed in the proposal R4-030928 is compared with the SIR method modified by the present invention.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur une méthode de détection d'un rapport signal/bruit permettant d'effectuer une détection E-DPCCH SIR dans un système HSUPA et une détection HS-DPCCH SIR. La méthode comporte les étapes suivantes: acquisition de l'énergie sonore de chaque symbole DPCCH et de l'énergie sonore de chaque symbole E-DPCCH/HS-DPCCH; estimation de canal pour E-DPCCH/HS-DPCCH; obtention de la séquence de sortie de signal de E-DPCCH/HS-DPCCH; exécution de l'opération de corrélation de la séquence de sortie de signal de E-DPCCH ou actionnement moyens cumulatifs de la séquence de sortie de signal de E-DPCCH; et obtention du SIR du E- DPCCH/HS-DPCCH.
PCT/CN2007/001626 2007-05-18 2007-05-18 Méthode de détection d'un rapport signal/bruit WO2008141476A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/001626 WO2008141476A1 (fr) 2007-05-18 2007-05-18 Méthode de détection d'un rapport signal/bruit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/001626 WO2008141476A1 (fr) 2007-05-18 2007-05-18 Méthode de détection d'un rapport signal/bruit

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WO2008141476A1 true WO2008141476A1 (fr) 2008-11-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9414431B2 (en) 2014-02-14 2016-08-09 Freescale Semiconductor, Inc. Method of discontinuous transmission detection
US9480103B2 (en) 2014-02-14 2016-10-25 Freescale Semiconductor, Inc. Method of DTX detection in a wireless communication system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1474609A (zh) * 2002-08-08 2004-02-11 深圳市中兴通讯股份有限公司 一种信干比测量动态优化的装置与方法
CN1529435A (zh) * 2003-09-28 2004-09-15 中兴通讯股份有限公司 Wcdma系统上行链路的sir测量方法和装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1474609A (zh) * 2002-08-08 2004-02-11 深圳市中兴通讯股份有限公司 一种信干比测量动态优化的装置与方法
CN1529435A (zh) * 2003-09-28 2004-09-15 中兴通讯股份有限公司 Wcdma系统上行链路的sir测量方法和装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9414431B2 (en) 2014-02-14 2016-08-09 Freescale Semiconductor, Inc. Method of discontinuous transmission detection
US9480103B2 (en) 2014-02-14 2016-10-25 Freescale Semiconductor, Inc. Method of DTX detection in a wireless communication system

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