USRE40385E1 - Orthogonal complex spreading method for multichannel and apparatus thereof - Google Patents
Orthogonal complex spreading method for multichannel and apparatus thereof Download PDFInfo
- Publication number
- USRE40385E1 USRE40385E1 US10/932,227 US93222704A USRE40385E US RE40385 E1 USRE40385 E1 US RE40385E1 US 93222704 A US93222704 A US 93222704A US RE40385 E USRE40385 E US RE40385E
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- 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
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
- H04J13/0048—Walsh
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
- H04J13/102—Combining codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J2013/0037—Multilevel codes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Complex Calculations (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Radio Transmission System (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Amplifiers (AREA)
Abstract
Description
-
- a first adder for outputting
- which is obtained by summing the output signals from the first Hadamard sequence multiplier;
- a second adder for outputting
- which is obtained by summing the output signals from the second Hadamard sequence multiplier; a complex multiplier for receiving the output signal from the first adder and the output signal from the second adder in the complex form of
- and complex-multiplying WM,j+jPWM,Q which n=1 consist of the orthogonal Hadamard code WM,j, and the permutated orthogonal Hadamard code PWM,Q that WM,Q and a predetermined sequence P are complex-multiplied; a spreading unit for multiplying the output signal from the complex multiplier by the spreading code; a filter for filtering the output signal from the spreading unit; and a modulator for multiplying and modulating the modulation carrier wave, summing the in-phase signal and the quadrature-phase signal and outputting a modulation signal of the real number.
- a first adder for outputting
where K represents a predetermined integer greater than or equal to 1, n represents an integer greater than or equal to 1 and less than K and is identical with each channel number of the multichannel.
which is obtained by summing the output signals from the first
which is obtained by summing the output signals from the second
and complex-multiplying WM,I+jPWM,Q which consist of the orthogonal Hadamard code WM,I, and the permutated orthogonal Hadamard code PWM,Q that WM,Q and a predetermined sequence P are complex-multiplied, a spreading
which is summed by the
which is summed by the
In addition, the
where K represents an integer greater than or equal to 1.
Claims (287)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/932,227 USRE40385E1 (en) | 1997-12-02 | 2004-09-02 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US11/648,915 USRE44507E1 (en) | 1997-12-02 | 2007-01-03 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US13/177,498 USRE44635E1 (en) | 1997-12-02 | 2011-07-06 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US14/047,435 US20140126611A1 (en) | 1997-12-02 | 2013-10-07 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR19970065375 | 1997-12-02 | ||
KR1019980011923A KR100269593B1 (en) | 1997-12-02 | 1998-04-04 | Orthogonal complex spreading based modulation method for multichannel transmission |
US09/162,764 US6222873B1 (en) | 1997-12-02 | 1998-09-30 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US09/767,953 US6449306B1 (en) | 1997-12-02 | 2001-03-27 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US10/932,227 USRE40385E1 (en) | 1997-12-02 | 2004-09-02 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/162,764 Continuation US6222873B1 (en) | 1997-12-02 | 1998-09-30 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US09/767,953 Reissue US6449306B1 (en) | 1997-12-02 | 2001-03-27 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/767,953 Continuation US6449306B1 (en) | 1997-12-02 | 2001-03-27 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US11/648,915 Reissue USRE44507E1 (en) | 1997-12-02 | 2007-01-03 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US11/648,915 Continuation USRE44507E1 (en) | 1997-12-02 | 2007-01-03 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Publications (1)
Publication Number | Publication Date |
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USRE40385E1 true USRE40385E1 (en) | 2008-06-17 |
Family
ID=26633222
Family Applications (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/162,764 Expired - Lifetime US6222873B1 (en) | 1997-12-02 | 1998-09-30 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US09/767,953 Ceased US6449306B1 (en) | 1997-12-02 | 2001-03-27 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US10/932,227 Expired - Lifetime USRE40385E1 (en) | 1997-12-02 | 2004-09-02 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US11/648,915 Expired - Lifetime USRE44507E1 (en) | 1997-12-02 | 2007-01-03 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US13/177,498 Expired - Lifetime USRE44635E1 (en) | 1997-12-02 | 2011-07-06 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US14/047,435 Abandoned US20140126611A1 (en) | 1997-12-02 | 2013-10-07 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/162,764 Expired - Lifetime US6222873B1 (en) | 1997-12-02 | 1998-09-30 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US09/767,953 Ceased US6449306B1 (en) | 1997-12-02 | 2001-03-27 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/648,915 Expired - Lifetime USRE44507E1 (en) | 1997-12-02 | 2007-01-03 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US13/177,498 Expired - Lifetime USRE44635E1 (en) | 1997-12-02 | 2011-07-06 | Orthogonal complex spreading method for multichannel and apparatus thereof |
US14/047,435 Abandoned US20140126611A1 (en) | 1997-12-02 | 2013-10-07 | Orthogonal complex spreading method for multichannel and apparatus thereof |
Country Status (6)
Country | Link |
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US (6) | US6222873B1 (en) |
EP (10) | EP1819082B1 (en) |
JP (1) | JP3094292B2 (en) |
KR (1) | KR100269593B1 (en) |
DE (4) | DE69840883D1 (en) |
HK (5) | HK1108982A1 (en) |
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