JPH11511914A - 耐マルチパス型直交符号分割多重アクセス・システム - Google Patents
耐マルチパス型直交符号分割多重アクセス・システムInfo
- Publication number
- JPH11511914A JPH11511914A JP8511155A JP51115596A JPH11511914A JP H11511914 A JPH11511914 A JP H11511914A JP 8511155 A JP8511155 A JP 8511155A JP 51115596 A JP51115596 A JP 51115596A JP H11511914 A JPH11511914 A JP H11511914A
- Authority
- JP
- Japan
- Prior art keywords
- ocdma
- multipath
- base station
- modulator
- chip
- 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.)
- Granted
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0022—PN, e.g. Kronecker
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
- H04J13/102—Combining codes
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Complex Calculations (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Noise Elimination (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.基地局と、複数の移動ハンドセットと、前記基地局および前記複数の移動ハ ンドセットにおける変調器手段および復調器手段とを有する直交符号分割多重ア クセス(OCDMA)無線電話システムにおいて、前記変調器は各ラデマッハー /ウォルシュ(RW)チップごとに複数のPNチップを有し、各復調器は相関器 を有し、かつ各変調器は前記相関器がRWチップの小さな部分よりも遅延された マルチパス成分に対して利得弁別を生じるように充分に高いPNチッピング速度 を設定する手段を含む、前記OCDMAシステムに耐マルチパス遅延拡散性を持 たせるOCDMA無線電話システム。 2.基地局と、複数の移動ハンドセットと、前記基地局および前記複数の移動ハ ンドセットにおける、各ラデマッハー/ウォルシュ(RW)チップごとに複数の PNチップを有する変調器手段と、各々が相関器を有する復調器手段とを有する 直交符号分割多重アクセス(OCDMA)無線電話システムに耐マルチパス遅延 拡散性を持たせる方法において、前記相関器がRWチップの小さな部分よりも遅 延されたマルチパス成分に対して利得弁別を生じるように、各変調器においてP Nチッピング速度をあるレベルに設定するステップを含む方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1995/008234 WO1997003503A1 (en) | 1995-07-13 | 1995-07-13 | Multipath resistant, orthogonal code-division multiple access system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11511914A true JPH11511914A (ja) | 1999-10-12 |
JP3614436B2 JP3614436B2 (ja) | 2005-01-26 |
Family
ID=22249393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51115596A Expired - Fee Related JP3614436B2 (ja) | 1995-07-13 | 1995-07-13 | 耐マルチパス型直交符号分割多重アクセス・システム |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0838105B1 (ja) |
JP (1) | JP3614436B2 (ja) |
AT (1) | ATE265761T1 (ja) |
AU (1) | AU711458B2 (ja) |
DE (1) | DE69532973T2 (ja) |
WO (1) | WO1997003503A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6134215A (en) * | 1996-04-02 | 2000-10-17 | Qualcomm Incorpoated | Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel |
US6678311B2 (en) | 1996-05-28 | 2004-01-13 | Qualcomm Incorporated | High data CDMA wireless communication system using variable sized channel codes |
US20020150149A1 (en) * | 2000-09-29 | 2002-10-17 | Yoshihiro Tanno | Code detection circuit and code detection method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5103459B1 (en) * | 1990-06-25 | 1999-07-06 | Qualcomm Inc | System and method for generating signal waveforms in a cdma cellular telephone system |
US5375140A (en) * | 1992-11-24 | 1994-12-20 | Stanford Telecommunications, Inc. | Wireless direct sequence spread spectrum digital cellular telephone system |
-
1995
- 1995-07-13 WO PCT/US1995/008234 patent/WO1997003503A1/en active IP Right Grant
- 1995-07-13 DE DE69532973T patent/DE69532973T2/de not_active Expired - Lifetime
- 1995-07-13 AT AT95926608T patent/ATE265761T1/de not_active IP Right Cessation
- 1995-07-13 AU AU30924/95A patent/AU711458B2/en not_active Expired
- 1995-07-13 JP JP51115596A patent/JP3614436B2/ja not_active Expired - Fee Related
- 1995-07-13 EP EP95926608A patent/EP0838105B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE265761T1 (de) | 2004-05-15 |
EP0838105A1 (en) | 1998-04-29 |
DE69532973T2 (de) | 2005-02-10 |
WO1997003503A1 (en) | 1997-01-30 |
AU3092495A (en) | 1997-02-10 |
DE69532973D1 (de) | 2004-06-03 |
EP0838105A4 (en) | 2000-03-01 |
EP0838105B1 (en) | 2004-04-28 |
AU711458B2 (en) | 1999-10-14 |
JP3614436B2 (ja) | 2005-01-26 |
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