Multiple frequency radio system employing pulse repeaters

Details Multiple frequency radio system employing pulse repeaters Multiple frequency radio system employing pulse repeaters

1988-08-15

1991-08-13

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 4, 375 7, 455 7, 455 77, 380 32, H04B 336

Patent

active

050401890

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

This invention relates to a radio system employing pulse repeaters in general and particularly to a multiple frequency radio system utilizing pulse repeaters which are capable of operating on more than one frequency. A radio system employing pulse repeaters is disclosed in U.S. Pat. No. 3,825,829 issued to the inventor of the present invention. This prior patent discloses a system for propagating pulses through a field of pulse repeaters. After propagating a pulse, each repeater is blanked for an interval during which time it can not repeat additional pulses, thereby preventing self sustaining oscillation of the system. The effective bit rate of the prior art system is limited by this blanking interval, which is determined by the maximum propagation delay in any particular system implementation.


SUMMARY OF THE INVENTION

This radio system employing pulse repeaters is capable of repeating pulses on a plurality of frequencies thereby providing increased bit rate of operation and system throughput as compared to a single frequency system.
The pulse communication system includes a plurality of pulse repeaters for receiving and transmitting pulse signals in a chain reaction fashion. Each repeater includes frequency control means for selecting one of a sequence of transmit and receive frequencies. The frequency control means changes the transmit and receive frequency after the reception of a pulse in order to receive and transmit the next pulse on another frequency.
In one aspect of the invention a pulse repeater includes receiving means for receiving pulse signals. Detecting means are connected to the receiving means for detecting the presence of a pulse signal. Transmitting means is responsive to the detecting means for transmitting a pulse signal upon detection of the pulse signal. A frequency control means selects one of a series of operating frequencies so that each pulse is received and transmitted on a frequency differing from that of the previous pulse.
In another aspect of the invention a pulse transceiver is provided for receiving and transmitting pulse signals. A frequency control means changes the transmit frequency after the transmission of each pulse and the receive frequency after the receiption of each pulse.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a functional block diagram of a repeater for use in a system according to the invention;
FIG. 2 is an electrical schematic diagram of a frequency controller for use in the repeater of FIG. 1 for two frequency operation;
FIG. 3 is an electrical schematic diagram of a frequency controller for use in the pulse repeater of FIG. 1 for multiple frequency operation;
FIG. 4 is a block diagram of a transceiver for use with the communication system according to the invention;
FIG. 5 is an electrical schematic diagram of a frequency controller for use in the repeater of FIG. 5 for two frequency operation;
FIG. 6 is an electrical schematic diagram of a frequency controller for use in the transceiver of FIG. 4 for multiple frequency operation;
FIGS. 7A through 7G shows various timing diagrams of the repeater of FIG. 1 for two frequency operation;
FIG. 8 is a block diagram of a typical radio system according to the present invention.


DESCRIPTION OF THE PREFERRED EMBODIMENT

The basic operation of a radio system utilizing pulse repeaters, including operation of the repeaters and portable units (transceivers), is described in U.S. Pat. No. 3,825,829 the disclosure of which is hereby incorporated by reference as if fully set out herein. The operation of the present system which repeats pulses on a plurality of frequencies, comprising a series or sequence, for providing increased system bit rate and throughput is described below.
Referring now by characters of references to the drawings and first to FIG. 1, it will be understood that a repeater 10 includes an antenna 11 connected to an RF switch 12 which functions as a transmit receive switch for switching the antenna between receiver and transmitter portions of the repeater. The

REFERENCES:
patent: 2666845 (1954-01-01), Colton et al.
patent: 3487310 (1969-12-01), Bateman et al.
patent: 3825829 (1974-07-01), Braun
patent: 4347625 (1982-08-01), Williams
patent: 4361886 (1982-10-01), Gutleber
patent: 4394775 (1983-07-01), Bruinsam
patent: 4442527 (1984-04-01), Munday
patent: 4451916 (1984-05-01), Casper et al.
patent: 4606040 (1986-08-01), David et al.

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