GB1450392A - Communicagions equipment - Google Patents

Communicagions equipment

Info

Publication number
GB1450392A
GB1450392A GB2891972A GB2891972A GB1450392A GB 1450392 A GB1450392 A GB 1450392A GB 2891972 A GB2891972 A GB 2891972A GB 2891972 A GB2891972 A GB 2891972A GB 1450392 A GB1450392 A GB 1450392A
Authority
GB
United Kingdom
Prior art keywords
array
signal
phase
signals
amplitude
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.)
Expired
Application number
GB2891972A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2891972A priority Critical patent/GB1450392A/en
Publication of GB1450392A publication Critical patent/GB1450392A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

1450392 Radio communication PLESSEY CO Ltd 19 Sept 1973 [20 June 1972] 28919/72 Heading H4L In order that adverse effects caused by different relative propagation times of comraunication signals transmitted between two communication terminals via paths in different directions making use of one or more earthionosphere-earth hops may be compensated for, equipment at one terminal comprises a multi-element aerial array 1, with separate means (phase shifters 3 or 5 and combiners 4 or 6 respectively) associated with each element to afford the array two beam radiation patterns, arrangements 7, 8 being provided so that the amplitude and phase of a signal desired from or applied to the first beam channel may be changed relative to the signal from or to the second. The signals delivered from each beam forming means, when the aerial array is used as a receiver, each contain proportions of the two, relatively delayed, beams received on the directions corresponding to the two array patterns. By adjusting the phase and amplitude of one signal at 7, 8 and combining the two signals at 9, an output may be derived faithfully representing one of the received beams without interference from the other.
GB2891972A 1972-06-20 1972-06-20 Communicagions equipment Expired GB1450392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2891972A GB1450392A (en) 1972-06-20 1972-06-20 Communicagions equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2891972A GB1450392A (en) 1972-06-20 1972-06-20 Communicagions equipment

Publications (1)

Publication Number Publication Date
GB1450392A true GB1450392A (en) 1976-09-22

Family

ID=10283323

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2891972A Expired GB1450392A (en) 1972-06-20 1972-06-20 Communicagions equipment

Country Status (1)

Country Link
GB (1) GB1450392A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017037A1 (en) * 1979-03-27 1980-10-15 Siemens Aktiengesellschaft Assembly of at least two directionally and/or omnidirectionally inclined antennas coupled to a power dividing device
US4274951A (en) * 1977-12-14 1981-06-23 Trochem (Pty) Limited Ore dressing process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274951A (en) * 1977-12-14 1981-06-23 Trochem (Pty) Limited Ore dressing process
EP0017037A1 (en) * 1979-03-27 1980-10-15 Siemens Aktiengesellschaft Assembly of at least two directionally and/or omnidirectionally inclined antennas coupled to a power dividing device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee