WO2006077829A1 - 移動通信端末およびマルチパス干渉除去方法 - Google Patents
移動通信端末およびマルチパス干渉除去方法 Download PDFInfo
- Publication number
- WO2006077829A1 WO2006077829A1 PCT/JP2006/300529 JP2006300529W WO2006077829A1 WO 2006077829 A1 WO2006077829 A1 WO 2006077829A1 JP 2006300529 W JP2006300529 W JP 2006300529W WO 2006077829 A1 WO2006077829 A1 WO 2006077829A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- delay amount
- path
- mobile communication
- reception
- reception path
- Prior art date
Links
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
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
-
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1081—Reduction of multipath noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
Definitions
- the present invention relates to a mobile communication terminal and a multipath interference cancellation method.
- next-generation wireless access method for realizing high-speed wireless communication in the field of mobile communication is being actively conducted.
- HSDPA High Speed
- AMC adaptive modulation and channel coding
- the throughput is determined according to the reception environment of the mobile communication terminal (mobile device).
- Downlink Packet Access Downlink Packet Access
- the throughput and data channel error rate decrease due to interference from the delayed signal. Therefore, the reception capability of mobile communication terminals is improved by applying linear equalizers and interference cancellers that remove multipath interference.
- the mobile communication terminal MS measures the reception path from the common pilot channels (CPICH) C1 to C3 transmitted from the base station BS, and uses this reception path as the reception path. Based on this, a delay profile is generated. Based on the delay profile, the received power P1 to P3 of the receiving paths A1 to A3 and the delay amount (consent to the receiving timing and delay time) Q12 and Q13 are measured. For these measurements, for example, a known measurement method performed in a normal CDMA compatible mobile communication terminal can be used. Delay amount Q12 is the delay time difference between receiving reception path A1 and receiving reception path A2 (delayed wave). Delay amount Q13 is reception path A3 (delay This is the delay time difference until a wave is received.
- CPICH common pilot channels
- the horizontal axis of the delay profile shown in Fig. 1 (b) is the time.
- the vertical axis represents received power.
- P12 shown in Fig. 1 (b) indicates the power difference between the received power P1 of the receiving path A1 and the received power P2 of the receiving path A2, and P13 is the received power P1 of the receiving path A1 and the received path A3. Indicates the power difference from the received power P3.
- FIG. 2 (a) is a diagram showing only the lower part of the delay profile shown in FIG. 1 (b).
- a weight matrix is generated based on the generated channel matrix, and interference is removed by multiplying the weight matrix by a channel on which data information is actually placed.
- the delay profile creation unit 91 despreads the signal transmitted from the base station using the common pilot channel to generate, for example, the delay profile shown in FIG. 1 (b).
- the delay profile creation unit 91 measures the received powers P1 to P3 and the delay amounts Q12 and Q13 of the reception paths A1 to A3 based on the delay profile shown in FIG.
- the delay profile creation unit 91 has an MF (Matched Filter) function.
- the channel matrix generation unit 92 generates the channel matrix shown in FIG. 2 (b) based on the number of samples W and the maximum delay amount D shown in FIG. 2 (a).
- the channel matrix is represented as a (W + D) -by-W matrix.
- the weight matrix generation unit 93 generates a weight matrix by performing an inverse matrix operation on the channel matrix shown in FIG. 2 (b).
- the interference removal unit 94 removes multipath interference by multiplying the data on the channel by a weight matrix.
- Non-Patent Document 1 discloses a technique related to the above-described conventional interference cancellation method.
- the interference canceling device enables higher-speed wireless communication by removing interference due to a delayed wave of its own signal.
- the interference cancellers that have been studied in the past perform interference cancellation by using predetermined parameters. Therefore, even though interference cancellation is performed by increasing power consumption, it cannot cope with various changes in the environment of the receiving path and cannot contribute to the improvement of characteristics. It will be born. Cases that cannot contribute to the improvement of characteristics will be described in detail with reference to Figs.
- the present invention can perform interference removal according to various reception path environments and can improve characteristics. It is an object of the present invention to provide a path interference removal method.
- the mobile communication terminal of the present invention includes setting means for setting a maximum delay amount according to a delay amount of a reception path farthest from a reference reception path, a predetermined number of samples, and the set maximum value It is characterized by comprising: generating means for generating a channel matrix based on the delay amount; and interference removing means for performing interference cancellation based on the generated channel matrix.
- the multipath interference canceling method of the present invention is a multipath interference canceling method in a mobile communication terminal, wherein the maximum delay amount is set according to the delay amount of the receiving path farthest from the reference receiving path.
- a channel matrix is generated based on the predetermined number of samples and the set maximum delay amount, and interference cancellation is performed based on the generated channel matrix.
- the farthest received path is the most delayed among paths having a power value equal to or higher than a predetermined threshold value compared to the power value of the reference receiving path.
- the amount is large, preferably a pass.
- the mobile communication terminal and multipath interference cancellation method of the present invention it is possible to perform interference cancellation according to the environment of various reception paths, and to improve the characteristics.
- FIG. 1 (a) schematically shows a situation in which a mobile communication terminal receives a reception path from a base station, and (b) is a diagram for explaining a delay profile.
- FIG. 2 (a) is a diagram showing a part of the delay profile, and (b) is a diagram for explaining the channel matrix.
- FIG. 3 is a diagram illustrating a functional configuration of a conventional interference cancellation device.
- FIG. 4 is a diagram for explaining a range having an interference removal effect when the delay amount of the reception path is small.
- FIG. 5 is a diagram for explaining a range having an interference removal effect when the delay amount of the reception path is large.
- FIG. 6 is a diagram for explaining a range having an interference removal effect when the power amount of the reception path is small.
- FIG. 7 is a diagram exemplifying a functional configuration of an interference cancellation device in the embodiment.
- FIG. 8] (a) and (b) are diagrams for explaining the method of setting the maximum delay amount according to the delay amount of the reception path and the received power.
- FIG. 9 is a flowchart showing a procedure of an interference removal method in the present embodiment.
- FIG. 10 is a diagram for explaining the maximum delay amount control when the delay amount of the reception path is small.
- FIG. 11 is a diagram for explaining the maximum delay amount control when the delay amount of the reception path is large.
- FIG. 12 is a diagram for explaining maximum delay amount control when the power of the reception path is small. Explanation of symbols
- 11 Delay profile creation unit, 12 ⁇ 'Maximum delay amount setting unit, 13 ⁇ Channel matrix generation unit, 14 ⁇ ⁇ ⁇ Weight matrix generation unit, 15 ⁇ ⁇ ⁇ Interference cancellation unit.
- the mobile communication terminal in the present embodiment is equipped with a high-speed wireless communication function based on HSDPA, for example, high-rate error correction code, multi-value such as 16QAM (Quadrature Amplitude Modulation), 64QAM, etc. By using modulation, the frequency utilization efficiency is improved and high-speed wireless communication is realized.
- mobile communication terminals include, for example, cellular phones, simple cellular phones (PHS), and portable information terminals (PD) having communication functions. A) etc. are applicable.
- FIG. 7 is a diagram illustrating an example of a functional configuration of the interference cancellation device mounted on the mobile communication terminal according to the embodiment.
- the interference canceller mounted on the mobile communication terminal includes a delay profile creation unit 11, a maximum delay amount setting unit 12 (setting unit), a channel matrix generation unit 13 (generation unit), A weight matrix generation unit 14 and an interference removal unit 15 (interference removal means) are included.
- the delay profile creation unit 11 measures the signal reception path transmitted from the base station using the common pilot channel, and receives the received signal. Based on the path, a delay profile as shown in Fig. 1 (b) is generated. The delay profile creation unit 11 also measures the received power of each reception path and the amount of delay between the reference reception path (hereinafter referred to as the reference path) and other reception paths based on the generated delay profile. To do.
- the reference path for example, the path with the maximum received power or the path with the earliest arrival time from the base station is applicable.
- the received power and the delay amount can be measured using, for example, a known measurement method performed in a normal CDMA compatible mobile communication terminal.
- the delay profile creation unit 11 has an MF (Matched Filter) function.
- the maximum delay amount setting unit 12 sets the maximum delay amount D according to the delay amount of the reception path farthest from the reference path. This amount of delay is represented by the difference in delay time from the reference path to the predetermined reception path.
- the maximum delay amount setting unit 12 selects the power value of the reference path and the reception value farthest from the reference path when selecting the reception path farthest from the reference path used when setting the maximum delay amount D. Compare the power value of the path. If it is determined that the power value of the farthest reception path is equal to or less than a predetermined threshold (for example, 10 dB), it is excluded from the reception path selection targets used when setting the maximum delay amount D. .
- a predetermined threshold for example, 10 dB
- the maximum delay amount setting unit 12 compares the power value of the reception path far from the reference path next to the excluded reception path with the power value of the reference path. That is, the maximum delay amount setting unit 12 compares the power value of the reference path with the power value greater than or equal to a predetermined threshold value, and the delay amount is the largest, and the maximum delay amount is set in accordance with the delay amount of the reception path. Set the delay amount D. As a result, reception paths with low reception power can be excluded from interference cancellation, so The number of calculations can be reduced.
- FIG. 8 (a) is a diagram showing the maximum delay amount when the power difference between the reference path P1 having the largest power and the reception paths P2 to P4 which are delayed waves is less than 10 dB.
- the reception path P4 is selected as the reception path farthest from the reference path P1, and the delay amount of the reception path P4 with respect to the reference path P1 is set as the maximum delay amount D.
- FIG. 8 (b) shows the maximum delay when the power difference between the reference path P1 with the largest power and the reception path P4 among the reception paths P2 to P4, which is a delayed wave, is 10 dB or more.
- FIG. 8 (b) since the power difference P14 between the reference path P1 and the reception path P4 is 10 dB or more, the reception path P4 is excluded from the selection target as the reception path farthest from the reference path.
- the reception path P3 is selected as the reception path farthest from the reference path P1, and the delay amount of the reception path P3 with respect to the reference path P1 is set as the maximum delay amount D.
- Channel matrix generation unit 13 generates a channel matrix shown in FIG. 2 (b) based on a predetermined number of samples W and maximum delay amount D set by maximum delay amount setting unit 12. .
- the weight matrix generation unit 14 generates a weight matrix based on the channel matrix generated by the channel matrix generation unit 13 in the same manner as the weight matrix generation unit 93 in the background art described above.
- the interference cancellation unit 15 multiplies the data on the channel by the weight matrix generated by the weight matrix generation unit 14. Remove interference.
- the delay profile creation unit 11 of the mobile communication terminal measures a reception path based on the common pilot channel transmitted from the base station (step S1), generates a delay profile, and generates each reception path. Measure the received power and the amount of delay between the reference path and other received paths.
- the maximum delay amount setting unit 12 determines whether or not the power difference between the reference path and the reception path farthest from the reference path is 10 dB or less (step S2). When this determination is NO (step S2; NO), the maximum delay amount setting unit 12 sets the reception path determined this time to the reception path farthest from the reference path used when setting the maximum delay amount D. Excluded from selection. Then, the process proceeds to step S2.
- step S2 when the determination in step S2 is YES (step S2; YES), the maximum delay amount setting unit 12 selects the reception path determined this time as the reception path farthest from the reference path, The delay amount from the reference path in the selected reception path is set as the maximum delay amount (step S3). Thereafter, a channel matrix is generated based on the set maximum delay amount and a predetermined number of samplings. Then, the weight matrix generated based on this channel matrix is multiplied by the channel on which the data information is actually placed, thereby eliminating interference.
- the maximum delay amount D is reduced in accordance with the delay amount, so that the interference can be performed without performing unnecessary calculation. It is possible to remove S.
- the maximum delay is matched to this delay amount Q12.
- the quantity D can be set.
- the range for generating the channel matrix is the range indicated by R1
- the delay amount Q12 in the present embodiment is With the maximum delay amount D set together, the channel matrix generation range is reduced to the range indicated by R2. As a result, the number of rows and columns of the channel matrix can be reduced, and the number of computations can be reduced.
- the delay amount of the reception path is large, the characteristic by interference cancellation can be improved by increasing the maximum delay amount D according to the delay amount.
- the maximum delay is matched to this delay amount Q13.
- the amount of extension D can be set.
- the range for generating the channel matrix is limited to the range indicated by R1.
- the maximum delay amount D set in accordance with the delay amount Q 13 of this embodiment the range for generating the channel matrix is expanded to the range indicated by R2.
- the maximum delay amount D is set according to the delay amount of the reception path excluding the reception path with low reception power, so that the number of operations can be calculated. Can be reduced to increase the effect of interference cancellation.
- the reference path P1 when the received power of the reception path P3 is smaller than the reception power of the reference path P1, the reference path P1 The maximum delay amount D can be set in accordance with the delay amount Q12 of the reception path P2, which exceeds a predetermined threshold value compared to the received power of. In this case, as shown in FIG.
- the range for generating the channel matrix is the range indicated by R1, whereas the delay amount Q 12 in this embodiment is used.
- the range for generating the channel matrix is reduced to the range indicated by R2.
- the multipath interference cancellation method according to the present invention is a multipath interference cancellation method in a mobile communication terminal, and sets a maximum delay width according to a delay amount of a reception path or a path power of the reception path.
- a channel matrix is generated based on a predetermined number of samples and the set maximum delay width, and interference cancellation is performed based on the generated channel matrix.
- the control of “setting the maximum delay amount D from the path delay amount and the received power obtained by the delay profile” is performed. By preparing, it is possible to generate an optimal channel matrix for performing interference cancellation.
- the mobile communication terminal generates a common pilot channel power delay profile file transmitted from the base station, and measures the received power and delay amount (reception timing and agreement) of the reception path (see Fig. 1). Note that these measurements are performed on a normal CDMA mobile communication terminal. If it is, it can measure easily.
- the delay amount of the reception path P4 farthest from the matrix generation reference point (the reception path with the maximum reception power or the reception path with the earliest arrival time) is set as the maximum delay amount D (Fig. (See 8 (a)).
- the reception path P1 with the maximum received power is the generation reference point.
- the received power of the farthest receiving path P4 is higher than the receiving power of the receiving power with the highest power (main path (reference path)) P1 (for example, 10 dB )
- the delay amount of the next separated reception path P3 is set as the maximum delay amount D without using the interference cancellation path.
- a weight matrix is generated based on the generated channel matrix, and interference cancellation is performed by multiplying the channel on which data information is actually placed (see Fig. 7).
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Noise Elimination (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06711809A EP1845628A4 (en) | 2005-01-18 | 2006-01-17 | MOBILE COMMUNICATION TERMINAL AND METHOD OF ELIMINATING MULTI-PATH INTERFERENCE |
US11/814,221 US20080253310A1 (en) | 2005-01-18 | 2006-01-17 | Mobile Communication Terminal, and Multipath Interference Eliminating Method |
JP2006553895A JPWO2006077829A1 (ja) | 2005-01-18 | 2006-01-17 | 移動通信端末およびマルチパス干渉除去方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-010848 | 2005-01-18 | ||
JP2005010848 | 2005-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006077829A1 true WO2006077829A1 (ja) | 2006-07-27 |
Family
ID=36692218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/300529 WO2006077829A1 (ja) | 2005-01-18 | 2006-01-17 | 移動通信端末およびマルチパス干渉除去方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080253310A1 (ja) |
EP (1) | EP1845628A4 (ja) |
JP (1) | JPWO2006077829A1 (ja) |
KR (1) | KR100899302B1 (ja) |
CN (1) | CN101103549A (ja) |
TW (1) | TW200642306A (ja) |
WO (1) | WO2006077829A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1753151A2 (en) | 2005-08-10 | 2007-02-14 | NTT DoCoMo INC. | Mobile communication terminal |
JP2012049733A (ja) * | 2010-08-25 | 2012-03-08 | Mitsubishi Electric Corp | 復調器および復調方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101170319B (zh) * | 2007-11-27 | 2012-09-05 | 中兴通讯股份有限公司 | 一种滤除干扰信号的方法及基站 |
JP5667876B2 (ja) * | 2008-09-30 | 2015-02-12 | 富士通株式会社 | 伝搬路推定装置、受信機、及び伝搬路推定方法 |
CN104252863A (zh) * | 2013-06-28 | 2014-12-31 | 上海通用汽车有限公司 | 车载收音机的音频降噪处理系统及方法 |
EP3255805B1 (en) | 2016-06-08 | 2020-09-02 | Nxp B.V. | Signal processing system and method |
US10939400B2 (en) | 2017-12-19 | 2021-03-02 | Qualcomm Incorporated | Time synchronization techniques for wireless communications |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002009668A (ja) * | 2000-06-26 | 2002-01-11 | Ntt Docomo Inc | 通信装置および検波方法 |
JP2002252575A (ja) * | 2000-12-19 | 2002-09-06 | Ntt Docomo Inc | 適応等化方法及び適応等化器 |
JP2002353853A (ja) * | 2001-05-25 | 2002-12-06 | Matsushita Electric Ind Co Ltd | 無線受信装置及び無線受信方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3312825A1 (de) * | 1983-04-09 | 1984-10-18 | INKOMA Industrie-Konstruktion Maschinenbau, 3302 Cremlingen | Ausgleichskupplung |
JP2991170B2 (ja) * | 1997-10-01 | 1999-12-20 | 日本電気株式会社 | Cdma受信装置および方法 |
US7336719B2 (en) * | 2001-11-28 | 2008-02-26 | Intel Corporation | System and method for transmit diversity base upon transmission channel delay spread |
JP4129014B2 (ja) * | 2005-08-10 | 2008-07-30 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信端末 |
-
2006
- 2006-01-17 EP EP06711809A patent/EP1845628A4/en not_active Withdrawn
- 2006-01-17 US US11/814,221 patent/US20080253310A1/en not_active Abandoned
- 2006-01-17 JP JP2006553895A patent/JPWO2006077829A1/ja active Pending
- 2006-01-17 WO PCT/JP2006/300529 patent/WO2006077829A1/ja active Application Filing
- 2006-01-17 CN CNA2006800019302A patent/CN101103549A/zh active Pending
- 2006-01-17 KR KR1020077018943A patent/KR100899302B1/ko not_active IP Right Cessation
- 2006-01-18 TW TW095101937A patent/TW200642306A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002009668A (ja) * | 2000-06-26 | 2002-01-11 | Ntt Docomo Inc | 通信装置および検波方法 |
JP2002252575A (ja) * | 2000-12-19 | 2002-09-06 | Ntt Docomo Inc | 適応等化方法及び適応等化器 |
JP2002353853A (ja) * | 2001-05-25 | 2002-12-06 | Matsushita Electric Ind Co Ltd | 無線受信装置及び無線受信方法 |
Non-Patent Citations (4)
Title |
---|
KAWAMURA T. ET AL.: "Comparison Between Multipath Interference Canceller and Chip Equalizer with Other-Cell Interference Suppression in HSDPA in Multipath Channel", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMM. ENGINEERS (TECHNICAL REPORT OF IEICE), vol. 102, no. 22, 12 April 2002 (2002-04-12), pages 123 - 128, XP002998677 * |
MAEDA N., SAMPEI S., MORINAGA N.: "A complexity reduced decision feedback equalizer using delay profile estimation", THE INSTITUTE OF ELECTR., INF. AND COMM. ENGINEERS (TECHN. REPORT OF IEICE), vol. 97, no. 322, 16 October 1997 (1997-10-16), pages 79 - 86, XP002998678 * |
NAKAMORI T. ET AL.: "Field Experiment Results on Throughput Performance of Linear Equalizer in WCDMA HSDPA", 8 September 2004 (2004-09-08), pages 361, XP002998676 * |
See also references of EP1845628A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1753151A2 (en) | 2005-08-10 | 2007-02-14 | NTT DoCoMo INC. | Mobile communication terminal |
EP1753151A3 (en) * | 2005-08-10 | 2007-09-19 | NTT DoCoMo INC. | Mobile communication terminal |
US7817710B2 (en) | 2005-08-10 | 2010-10-19 | Ntt Docomo, Inc. | Mobile communication terminal |
JP2012049733A (ja) * | 2010-08-25 | 2012-03-08 | Mitsubishi Electric Corp | 復調器および復調方法 |
Also Published As
Publication number | Publication date |
---|---|
US20080253310A1 (en) | 2008-10-16 |
JPWO2006077829A1 (ja) | 2008-06-19 |
KR20070103461A (ko) | 2007-10-23 |
CN101103549A (zh) | 2008-01-09 |
EP1845628A1 (en) | 2007-10-17 |
EP1845628A4 (en) | 2009-04-01 |
TW200642306A (en) | 2006-12-01 |
KR100899302B1 (ko) | 2009-05-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4444961B2 (ja) | 伝送チャネルのチャネル評価の決定 | |
JP4425283B2 (ja) | 移動通信端末およびマルチパス干渉除去装置の起動を制御する方法 | |
JP4464020B2 (ja) | スペクトル拡散信号特性の知識から得られる重み係数を使用するrake組合わせ方法と装置 | |
JP4933646B2 (ja) | チャネル推定を改善するシステム及び方法 | |
KR101059053B1 (ko) | 핑거 로크 상태를 설정하기 위한 시스템들, 방법들 및 장치 | |
US8842658B2 (en) | Synchronization channel interference cancellation | |
US7860199B2 (en) | Method and system for single antenna receiver system for HSDPA | |
JP4216597B2 (ja) | スペクトラム拡散通信システムにおいて無線チャネル・パラメータを推定するシステム、方法および装置 | |
WO2006077829A1 (ja) | 移動通信端末およびマルチパス干渉除去方法 | |
US8265131B2 (en) | Control apparatus for and control method of equalizer, and wireless terminal having that control apparatus | |
US8351487B1 (en) | Equalizer with adaptive noise loading | |
EP1480350A1 (en) | Determination of a channel estimate of a transmission channel | |
JP4129014B2 (ja) | 移動通信端末 | |
B Baltzis | The rake receiver principle: Past, present and future | |
JP2010530701A (ja) | 時分割二重システムに基づくcdmaシステムにおける適応結合チャネル推定方法およびシステム | |
Zentner et al. | Methods to Increase the Number of Mobile Users in a Wireless Network | |
WO2004083886A2 (en) | Soft decision-based decorrelator for estimating spatial signatures in a wireless communications systems | |
WO2012171550A1 (en) | Method and device for error compensation in a communications network |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006553895 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200680001930.2 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006711809 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020077018943 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2006711809 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11814221 Country of ref document: US |