GB542023A - Means for reducing multipath signal distortion - Google Patents

Means for reducing multipath signal distortion

Info

Publication number
GB542023A
GB542023A GB10?56/40D GB1045640D GB542023A GB 542023 A GB542023 A GB 542023A GB 1045640 D GB1045640 D GB 1045640D GB 542023 A GB542023 A GB 542023A
Authority
GB
United Kingdom
Prior art keywords
receiver
arrangement
output
june
propagation
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
GB10?56/40D
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB542023A publication Critical patent/GB542023A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/30—Time-delay networks
    • H03H7/34—Time-delay networks with lumped and distributed reactance
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

Abstract

542,023. Wireless receiving apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 17, 1940, No. 10456. Convention date, June 16, 1939. [Classes 40 (iii and 40 (v)] In a receiver for electric wave signals, distortion due to transmission over paths requiring different times of propagation is corrected by an arrangement including a co-axial transmission line whereby a portion of the signal energy is withdrawn, its time of propagation is changed in relation to the remaining portion and it is then re-combined with the latter in the correct polarity for reducing the distortion. Fig. 3 shows an arrangement in which a portion of the output from receiver 3 is taken out through an adjustable resistance R1 into a time delay cable 4 the reflected energy being reintroduced through a resistance R2, the amplitude and polarity being suitably adjusted. A modified arrangement is described for a receiver having a balanced push-pull output (Fig. 5, not shown), and in a further arrangement, Fig. 6, a portion of power is taken from the signal output and fed back over cable 6 with suitable time delay to a point P of the circuit in advance of a signal amplifier SA. The applications of the above methods to a number of conditions due to lagging and leading interference are discussed. Specification 507,417 is referred to. In the Specification as open to inspection under Sect. 91 the method is stated to be applicable to audio frequency telephone circuits to reduce echo effects and to acoustic arrangements in which case the delay line may be constituted by mechanical devices such as piezo-electric or magnetostrictive elements or even magnetized moving wheels or wires. This subject-matter does not appear in the Specification as accepted.
GB10?56/40D 1939-06-16 1940-06-17 Means for reducing multipath signal distortion Expired GB542023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US279402A US2310692A (en) 1939-06-16 1939-06-16 Method of and means for reducing multiple signals

Publications (1)

Publication Number Publication Date
GB542023A true GB542023A (en) 1941-12-22

Family

ID=23068797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10?56/40D Expired GB542023A (en) 1939-06-16 1940-06-17 Means for reducing multipath signal distortion

Country Status (2)

Country Link
US (1) US2310692A (en)
GB (1) GB542023A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537008A (en) * 1967-05-09 1970-10-27 Trw Inc Communications system incorporating means for combatting multipath interference

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL79494C (en) * 1941-03-05
GB581968A (en) * 1941-04-04 1946-10-31 Standard Telephones Cables Ltd Improvements in or relating to the generation of electrical impulses
US2487995A (en) * 1941-05-26 1949-11-15 Samuel M Tucker Pulse echo receiver with regenerative feedback
US2483187A (en) * 1944-08-30 1949-09-27 Philco Corp Pulse radio echo distance indicator
US2434921A (en) * 1944-11-02 1948-01-27 Standard Telephones Cables Ltd Pulse amplitude selective system
US2434922A (en) * 1944-11-02 1948-01-27 Standard Telephones Cables Ltd Pulse amplitude selector system
BE461981A (en) * 1944-12-23
US2502454A (en) * 1944-12-27 1950-04-04 Standard Telephones Cables Ltd Method and means for improving signal to noise ratio of selected pulse signals
US2508571A (en) * 1945-02-08 1950-05-23 Us Sec War Radio echo detection apparatus
US2579070A (en) * 1945-02-14 1951-12-18 Rca Corp Multiplex communication system
US2537090A (en) * 1945-08-06 1951-01-09 Riebman Leon System for maintaining maximum pulse definition on high q networks
US3624652A (en) * 1946-01-16 1971-11-30 Us Navy Pulse generation system
ES177902A1 (en) * 1946-03-12 1947-06-16 Rca Corp AN ULTRA-HIGH FREQUENCY COMMUNICATION SYSTEM
US2523283A (en) * 1946-04-08 1950-09-26 Dickson John Pulse resolving network
US2598689A (en) * 1946-04-19 1952-06-03 Sperry Corp Noise reduction system for radar
US2480038A (en) * 1946-06-08 1949-08-23 Bell Telephone Labor Inc Compensation of distortion in guided waves
US2590405A (en) * 1946-08-13 1952-03-25 Rca Corp Signal to noise ratio of radar systems
US2597029A (en) * 1946-09-21 1952-05-20 Int Standard Electric Corp Superheterodyne radio receiver employing a multifunction tube
US2597781A (en) * 1947-05-02 1952-05-20 Gen Electric Co Ltd Electrical networks for echo correction in electrical signaling systems
US2579071A (en) * 1947-07-16 1951-12-18 Rca Corp Time division multiplex system
US2553572A (en) * 1947-11-10 1951-05-22 Int Standard Electric Corp Cross talk reduction in pulse multiplex receiver systems
US2552160A (en) * 1947-11-14 1951-05-08 Gen Electric Co Ltd Electrical network for the suppression of echoes and the like in electrical signalingsystems
US2701274A (en) * 1950-06-29 1955-02-01 Bell Telephone Labor Inc Signal predicting apparatus
US2935604A (en) * 1951-12-01 1960-05-03 Toro Michael J Di Long range communication system
US3036301A (en) * 1952-12-05 1962-05-22 Raytheon Co Communication systems
US2695359A (en) * 1953-12-14 1954-11-23 Gen Electric Co Ltd Electric pulse-signaling system receiver
US2946884A (en) * 1954-10-08 1960-07-26 Bell Telephone Labor Inc Automatic frequency control for radio receiver
US2804618A (en) * 1955-03-21 1957-08-27 Jfd Mfg Co Inc Interference eliminating antenna system
US2888515A (en) * 1955-06-07 1959-05-26 Rca Corp Reduction of ghost images in television
US3170157A (en) * 1957-06-03 1965-02-16 Sperry Rand Corp Receiver noise compensation system
US2939003A (en) * 1957-06-06 1960-05-31 Itt Pulse modulation detector circuit
US2979716A (en) * 1958-08-25 1961-04-11 Itt Diversity communication system
US3070777A (en) * 1959-01-02 1962-12-25 Phillips Petroleum Co Ghost elimination
US3725935A (en) * 1967-03-29 1973-04-03 Us Navy Leading edge discriminator circuit
GB1469101A (en) * 1973-03-23 1977-03-30 Dolby Laboratories Inc Noise reduction systems
US3996419A (en) * 1975-05-27 1976-12-07 Westinghouse Electric Corporation Technique for minimizing multi-path distortion effects in video transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537008A (en) * 1967-05-09 1970-10-27 Trw Inc Communications system incorporating means for combatting multipath interference

Also Published As

Publication number Publication date
US2310692A (en) 1943-02-09

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