CA2293128A1 - Radio wave environment analyzer - Google Patents

Radio wave environment analyzer Download PDF

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Publication number
CA2293128A1
CA2293128A1 CA002293128A CA2293128A CA2293128A1 CA 2293128 A1 CA2293128 A1 CA 2293128A1 CA 002293128 A CA002293128 A CA 002293128A CA 2293128 A CA2293128 A CA 2293128A CA 2293128 A1 CA2293128 A1 CA 2293128A1
Authority
CA
Canada
Prior art keywords
signal
transmitter
delay
radio wave
outputs
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
Application number
CA002293128A
Other languages
French (fr)
Other versions
CA2293128C (en
Inventor
Yoshihiko Kuwahara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Publication of CA2293128A1 publication Critical patent/CA2293128A1/en
Application granted granted Critical
Publication of CA2293128C publication Critical patent/CA2293128C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/11—Monitoring; Testing of transmitters for calibration
    • H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Security & Cryptography (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

A radio wave environment analyzer of the present invention includes a transmitter for radiating a signal subjected to BPSK
(BiPhase Shift Keying) modulation using a PN (Pseudo Noise) code sequence via a transmission antenna. A receiver includes an array antenna for receiving the signal sent from the transmitter. The outputs of antenna elements constituting the array antenna are sequentially selected. Each of these outputs is multiplied by a signal fed from a PN code generator and identical in code sequence with, hut slightly different from, the signal received from the transmitter and inversely spread thereby. The inversely spread signal is transformed to a baseband signal and then subjected to orthogonal detection. A signal processing device displays a delay profile representative of a relation between the power of detected signals and the delay time. In addition, directions of arrival are calculated on the basis of a designated period of time for direction of arrival analysis with the result that a PDA (Power, Delay and Angle) gram is displayed.
CA002293128A 1998-12-28 1999-12-24 Radio wave environment analyzer Expired - Fee Related CA2293128C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10372767A JP2000196540A (en) 1998-12-28 1998-12-28 Radio wave environment analysis device
JP10-372767 1998-12-28

Publications (2)

Publication Number Publication Date
CA2293128A1 true CA2293128A1 (en) 2000-06-28
CA2293128C CA2293128C (en) 2002-04-16

Family

ID=18501018

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002293128A Expired - Fee Related CA2293128C (en) 1998-12-28 1999-12-24 Radio wave environment analyzer

Country Status (5)

Country Link
JP (1) JP2000196540A (en)
KR (1) KR100323646B1 (en)
AU (1) AU6553799A (en)
CA (1) CA2293128C (en)
TW (1) TW460704B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7609786B2 (en) 2004-01-28 2009-10-27 Qualcomm Incorporated Channel estimation for a communication system using spectral estimation
JP5392994B2 (en) * 2006-05-12 2014-01-22 三菱電機株式会社 Radar signal processing apparatus and radar signal processing method
WO2012007985A1 (en) * 2010-07-12 2012-01-19 株式会社ニレコ Distance measuring apparatus and distance measuring method

Also Published As

Publication number Publication date
KR100323646B1 (en) 2002-02-07
JP2000196540A (en) 2000-07-14
CA2293128C (en) 2002-04-16
AU6553799A (en) 2000-06-29
TW460704B (en) 2001-10-21
KR20000052607A (en) 2000-08-25

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EEER Examination request
MKLA Lapsed

Effective date: 20141224