WO1985000482A1 - Diversite commandee par la qualite du signal - Google Patents

Diversite commandee par la qualite du signal Download PDF

Info

Publication number
WO1985000482A1
WO1985000482A1 PCT/US1984/000999 US8400999W WO8500482A1 WO 1985000482 A1 WO1985000482 A1 WO 1985000482A1 US 8400999 W US8400999 W US 8400999W WO 8500482 A1 WO8500482 A1 WO 8500482A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
noise flag
data
bit
data signal
Prior art date
Application number
PCT/US1984/000999
Other languages
English (en)
Inventor
Eugene Joseph Bruckert
James Steven Butcher
Thomas Frederick Kneisel
Original Assignee
Motorola, Inc.
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 Motorola, Inc. filed Critical Motorola, Inc.
Publication of WO1985000482A1 publication Critical patent/WO1985000482A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04B7/0802—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 antenna selection
    • H04B7/0805—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 antenna selection with single receiver and antenna switching
    • H04B7/0814—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 antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold

Definitions

  • Figure 4 shows an electrical schematic of a circuit in bit quality detector 30 in Figure 2 which generates noise flag bit information in accordance with the present invention.
  • the bit noise flag generator circuit consists of a series of flip-flops 40, 42, 44 which are configured as a 3 bit shift register. Samples are shifted into the three bit shift register at four times the data rate as shown by terminal 4X coupled to flip-flops 40, 42 and 44. The three outputs of this shift register provide the four sample per bit information required to recover clock and data and generate bit noise flags.

Abstract

Circuit et technique permettant d'orienter un système d'antennes adaptables. L'invention est couplée à la sortie d'un récepteur HF (28) présentant une configuration lui permettant de produire un signal de sortie de données, et évalue la qualité du signal de données du récepteur. L'invention commute les antennes (13, 14) lorsque la qualité du signal se détériore en tombant en dessous d'un niveau prédéterminé.
PCT/US1984/000999 1983-07-06 1984-06-27 Diversite commandee par la qualite du signal WO1985000482A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51143183A 1983-07-06 1983-07-06
US511,431 1983-07-06

Publications (1)

Publication Number Publication Date
WO1985000482A1 true WO1985000482A1 (fr) 1985-01-31

Family

ID=24034884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1984/000999 WO1985000482A1 (fr) 1983-07-06 1984-06-27 Diversite commandee par la qualite du signal

Country Status (4)

Country Link
EP (1) EP0148258A1 (fr)
AU (1) AU3150284A (fr)
CA (1) CA1220545A (fr)
WO (1) WO1985000482A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218605A1 (fr) * 1985-03-15 1987-04-22 Motorola, Inc. Recepteur diversite commande par la qualite des signaux
GB2178269B (en) * 1985-06-10 1989-08-16 Nec Corp Receiver for antenna switching diversity systems
WO1996039781A1 (fr) * 1995-06-06 1996-12-12 Flash Comm, Inc. Determination des conditions de propagation et de disponibilite des frequences dans un reseau de transmission de donnees sans fil
US5589844A (en) * 1995-06-06 1996-12-31 Flash Comm, Inc. Automatic antenna tuner for low-cost mobile radio

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628149A (en) * 1968-12-19 1971-12-14 Bell Telephone Labor Inc Diversity switch for digital transmission
US3651406A (en) * 1969-10-03 1972-03-21 Magnavox Co System for plural channel signal reception and readout and method of operation
US3963988A (en) * 1973-12-06 1976-06-15 Siemens Aktiengesellschaft Circuit arrangement for selecting a diversity channel
US3975687A (en) * 1974-08-24 1976-08-17 Nippon Electric Company, Ltd. Baseband signal switching arrangement for diversity reception in PCM radio communication system
US4015205A (en) * 1975-02-17 1977-03-29 Nippon Electric Company, Ltd. Baseband signal switching arrangement for diversity reception in a PCM radio communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628149A (en) * 1968-12-19 1971-12-14 Bell Telephone Labor Inc Diversity switch for digital transmission
US3651406A (en) * 1969-10-03 1972-03-21 Magnavox Co System for plural channel signal reception and readout and method of operation
US3963988A (en) * 1973-12-06 1976-06-15 Siemens Aktiengesellschaft Circuit arrangement for selecting a diversity channel
US3975687A (en) * 1974-08-24 1976-08-17 Nippon Electric Company, Ltd. Baseband signal switching arrangement for diversity reception in PCM radio communication system
US4015205A (en) * 1975-02-17 1977-03-29 Nippon Electric Company, Ltd. Baseband signal switching arrangement for diversity reception in a PCM radio communication system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218605A1 (fr) * 1985-03-15 1987-04-22 Motorola, Inc. Recepteur diversite commande par la qualite des signaux
EP0218605A4 (fr) * 1985-03-15 1987-10-08 Motorola Inc Recepteur diversite commande par la qualite des signaux.
GB2178269B (en) * 1985-06-10 1989-08-16 Nec Corp Receiver for antenna switching diversity systems
WO1996039781A1 (fr) * 1995-06-06 1996-12-12 Flash Comm, Inc. Determination des conditions de propagation et de disponibilite des frequences dans un reseau de transmission de donnees sans fil
US5589844A (en) * 1995-06-06 1996-12-31 Flash Comm, Inc. Automatic antenna tuner for low-cost mobile radio

Also Published As

Publication number Publication date
CA1220545A (fr) 1987-04-14
AU3150284A (en) 1985-02-07
EP0148258A1 (fr) 1985-07-17

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