JPS6465473A - Satellite communication and position measurement system for moving body - Google Patents

Satellite communication and position measurement system for moving body

Info

Publication number
JPS6465473A
JPS6465473A JP62221587A JP22158787A JPS6465473A JP S6465473 A JPS6465473 A JP S6465473A JP 62221587 A JP62221587 A JP 62221587A JP 22158787 A JP22158787 A JP 22158787A JP S6465473 A JPS6465473 A JP S6465473A
Authority
JP
Japan
Prior art keywords
signal
cdm
frequency
moving body
position measurement
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
JP62221587A
Other languages
Japanese (ja)
Other versions
JPH0565114B2 (en
Inventor
Osamu Ichiyoshi
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
Priority to JP62221587A priority Critical patent/JPS6465473A/en
Priority to CA000575448A priority patent/CA1293999C/en
Priority to EP19880113790 priority patent/EP0304890A3/en
Priority to AU21504/88A priority patent/AU605447B2/en
Priority to US07/236,019 priority patent/US4905221A/en
Publication of JPS6465473A publication Critical patent/JPS6465473A/en
Publication of JPH0565114B2 publication Critical patent/JPH0565114B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To utilize a valuable frequency resource by using both an FDM (frequency- division multiplex) communication system and a CDM (code-division multiplex) communication system together. CONSTITUTION:Small-sized earth stations 20-1-20-K and 40-2-40-K perform transmission to and reception from a base station 30 with assigned frequency slots by using a FDM signal. The base station 30, on the other hand, sends out a time reference at a constant period with a CMD signal. A moving body, on the other hand, has a comb-shaped filter bank which has a 1st channel as a stopping area and a 2nd channel as a passing area, so its filtering characteristics generate the CDM signal covering band width separately from the FDM signal, so that the CDM signal of narrow width of one frequency slot is outputted to a matching filter with every other frequency slot. Further, a spread spectrum modulator 11 processes the output of a data modulator 10 with a PN code synchronized with a regenerated PN clock. Further, the outputs of comb-shaped filter banks 30-1 and 30-2 are diffused reversely by matching filters 7-1 and 7-2, inputted to CDM demodulators 31-1-31-2, and inputted to a position measurement calculation part 8, so that the position measurement data are sent to the moving body.
JP62221587A 1987-08-24 1987-09-04 Satellite communication and position measurement system for moving body Granted JPS6465473A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62221587A JPS6465473A (en) 1987-09-04 1987-09-04 Satellite communication and position measurement system for moving body
CA000575448A CA1293999C (en) 1987-08-24 1988-08-23 Earth station capable of effectively using a frequency band of asatellite
EP19880113790 EP0304890A3 (en) 1987-08-24 1988-08-24 Earth station capable of effectively using a frequency band of a satellite
AU21504/88A AU605447B2 (en) 1987-08-24 1988-08-24 Earth station capable of effectively using a frequency band of a satellite
US07/236,019 US4905221A (en) 1987-08-24 1988-08-24 Earth station capable of effectively using a frequency band of a satellite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62221587A JPS6465473A (en) 1987-09-04 1987-09-04 Satellite communication and position measurement system for moving body

Publications (2)

Publication Number Publication Date
JPS6465473A true JPS6465473A (en) 1989-03-10
JPH0565114B2 JPH0565114B2 (en) 1993-09-17

Family

ID=16769085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62221587A Granted JPS6465473A (en) 1987-08-24 1987-09-04 Satellite communication and position measurement system for moving body

Country Status (1)

Country Link
JP (1) JPS6465473A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05153086A (en) * 1991-11-26 1993-06-18 Nippon Telegr & Teleph Corp <Ntt> Superimposing transmitting system for digital signal
KR100692595B1 (en) * 2005-03-29 2007-03-13 삼성전자주식회사 Signal multiplexing system for using frequency division multiplexing and code division multiplexing, and, method thereof
JP2010060303A (en) * 2008-09-01 2010-03-18 Mitsubishi Electric Corp Positioning apparatus
JP4782336B2 (en) * 1999-08-19 2011-09-28 インテグラル・システムズ，インコーポレイテツド Method and apparatus for locating unknown signal sources
JP2014500641A (en) * 2010-10-18 2014-01-09 北京▲郵▼▲電▼大学 Broadcast positioning signal generation method, positioning method and apparatus
JP6009131B1 (en) * 2015-12-25 2016-10-19 三菱電機株式会社 Speed estimation device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05153086A (en) * 1991-11-26 1993-06-18 Nippon Telegr & Teleph Corp <Ntt> Superimposing transmitting system for digital signal
JP4782336B2 (en) * 1999-08-19 2011-09-28 インテグラル・システムズ，インコーポレイテツド Method and apparatus for locating unknown signal sources
KR100692595B1 (en) * 2005-03-29 2007-03-13 삼성전자주식회사 Signal multiplexing system for using frequency division multiplexing and code division multiplexing, and, method thereof
JP2010060303A (en) * 2008-09-01 2010-03-18 Mitsubishi Electric Corp Positioning apparatus
JP2014500641A (en) * 2010-10-18 2014-01-09 北京▲郵▼▲電▼大学 Broadcast positioning signal generation method, positioning method and apparatus
JP6009131B1 (en) * 2015-12-25 2016-10-19 三菱電機株式会社 Speed estimation device
WO2017109951A1 (en) * 2015-12-25 2017-06-29 三菱電機株式会社 Speed estimation device

Also Published As

Publication number Publication date
JPH0565114B2 (en) 1993-09-17

Similar Documents

Publication Publication Date Title
EP0304890A3 (en) Earth station capable of effectively using a frequency band of a satellite
DE3750877D1 (en) SATELLITE COMMUNICATION SYSTEM FOR MOBILE USERS.
EP0514539A4 (en) Spread spectrum cdma communications system
EP0186884A3 (en) Spread spectrum communication system
JPS5362914A (en) Supernarrow band communication system
CA2020455A1 (en) Feed forward spread spectrum signal processor
DE3787166T2 (en) ANTENNA SYSTEM FOR A HYBRID COMMUNICATION SATELLITE.
GB1534379A (en) Communications system
JPS56132838A (en) Spread spectrum radio wave receiver
DE3169256D1 (en) Single channel duplex communication system
JPS6465473A (en) Satellite communication and position measurement system for moving body
DE3379311D1 (en) Radio communication system
EP0263687A3 (en) Spread spectrum communications systems and transmitters and receivers therefor
JPS57107649A (en) Radio frequency communication system
GB2198017B (en) Spread spectrum communication system
EP0319973A3 (en) Spread spectrum demodulating device for spread spectrum communication system
EP0270112A3 (en) Radio transmitter-receiver system for increasing or decreasing communication channels
GB2026818B (en) Time division multiplex communication system
JPS56149834A (en) Mobile radio wave communication system
GB1091278A (en) Improvements in or relating to multi-channel single-sideband carrier-frequency communication systems
TW431080B (en) High efficiency, sub-orbital, high altitude telecommunications system
JPS6430340A (en) System for multiplex communications by spread spectrum
GB2040143B (en) Asynchronus receiver for a spread spectrum communication system
JPS5335402A (en) Optical fibre communicating system
JPS6457845A (en) Code hopping type spread spectrum communication system

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees