US1849859A - Method of eliminating fading - Google Patents

Method of eliminating fading Download PDF

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Publication number
US1849859A
US1849859A US219569A US21956927A US1849859A US 1849859 A US1849859 A US 1849859A US 219569 A US219569 A US 219569A US 21956927 A US21956927 A US 21956927A US 1849859 A US1849859 A US 1849859A
Authority
US
United States
Prior art keywords
fading
carrier
side bands
frequencies
wave
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 - Lifetime
Application number
US219569A
Other languages
English (en)
Inventor
Weinberger Julius
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.)
RCA Corp
Original Assignee
RCA 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
Priority to NL26847D priority Critical patent/NL26847C/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US219569A priority patent/US1849859A/en
Priority to DER75362D priority patent/DE481794C/de
Application granted granted Critical
Publication of US1849859A publication Critical patent/US1849859A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B7/12—Frequency diversity

Definitions

  • This invention relates to the art of radio telegraph signalling and deals more specifically with a method for eliminating fading in short Wave radio telegraph signal transmission.
  • the short wave radio frequency carrier wave is modulated by means of a plurality of audio frequencies generated by several separate oscillators.
  • the short wave carrier may be modulated by means of an audio frequency wave composed of 1,000, 2,000, 3,000, 4,000, or 5,000 cycles,
  • the wave form which modulates the carrier frequencies is a 1,000 cycle tone, carrying strong higher harmonics.
  • the specific apparatus used as the oscillation generators, etc., as well as the modulation and the receiving means used in connection with the present invention may be of any of the well known types now available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Catching Or Destruction (AREA)
US219569A 1927-09-15 1927-09-15 Method of eliminating fading Expired - Lifetime US1849859A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL26847D NL26847C (enrdf_load_stackoverflow) 1927-09-15
US219569A US1849859A (en) 1927-09-15 1927-09-15 Method of eliminating fading
DER75362D DE481794C (de) 1927-09-15 1928-08-09 Verfahren zur Beseitigung der Schwundwirkung bei Kurzwellentelegraphie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US219569A US1849859A (en) 1927-09-15 1927-09-15 Method of eliminating fading

Publications (1)

Publication Number Publication Date
US1849859A true US1849859A (en) 1932-03-15

Family

ID=22819809

Family Applications (1)

Application Number Title Priority Date Filing Date
US219569A Expired - Lifetime US1849859A (en) 1927-09-15 1927-09-15 Method of eliminating fading

Country Status (3)

Country Link
US (1) US1849859A (enrdf_load_stackoverflow)
DE (1) DE481794C (enrdf_load_stackoverflow)
NL (1) NL26847C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE481794C (de) 1929-08-29
NL26847C (enrdf_load_stackoverflow)

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