Simultaneous communication system using time delays
First Claim
1. A system adapted to be disposed at one station for simultaneously transmitting and receiving information, with respect to a corresponding system disposed at another station, in a sequence having at least one predetermined transmit period followed by a predetermined receive period comprising:
- means for providing an input signal to be transmitted;
means for converting said input signal to a signal having a different frequency;
means for delaying the passage of said input signal therethrough for a predetermined time delay which corresponds to a portion of a receive period;
means for providing a clock signal to define the sequence of predetermined transmit periods and predetermined receive periods;
means connected to the input signal providing means and responsive to the clock signals for sequentially switching said input signal to the delaying means during each receive period and to the frequency converting means during each transmit period;
means for summing the switched output of the delaying means and the switched output of the frequency converting means to form a summed signal;
means responsive to the clock signal for transmitting the summed signal during each transmit period;
means responsive to the clock signal for receiving a summed signal transmitted from another station;
means for severing the delayed signal from the received summed signal;
means for separating said signal having a different frequency from the received summed signal;
means for reconverting said signal having a different frequency to the frequency of the input signal;
means for retarding the reconverted signal for a predetermined time of retardation corresponding to the predetermined time delay of the delaying means;
means connected to the retarding means and the severing means for reproducing the severed delayed signal during the receive period and the retarded reconverted signal during the subsequent transmit period,whereby the input signal for each receive period and the transmit period subsequent thereto can be transmitted to the other station during each subsequent transmit period as the signal transmitted by the other station and received during a receive period is reproduced during both the receive period and the transmit period subsequent thereto to provide simultaneous transmitting of the input signal and reproducing of the received signal.
0 Assignments
0 Petitions
Accused Products
Abstract
A communication system for simultaneous exchange of signals between first and second stations in which a timing signal of low frequency alternately switches a first station between receive and transmit with equal time periods and simultaneously switches a second station between transmit and receive with the same time periods. During a receive period, signals for transmission are delayed until the next transmit period. During the transmit period, the delay signal is combined with the signal occupying the transmit period. The combined signal along with the timing signal is transmitted by the first station to the second station, after which the first radio station switches to receive under control of the timing signal. The second station under the control of the same timing signal now transmits a similar combined signal which is received by the first station for processing. At the first station, the combined interrupted and uninterrupted signals are separated to provide a continuous signal which is then passed through an amplifier to a transducer or other device. In the same way, the second station also outputs a continuous signal to a transducer or similar device. Thus, simultaneous exchange of signals between the first and second stations is provided.
17 Citations
19 Claims
-
1. A system adapted to be disposed at one station for simultaneously transmitting and receiving information, with respect to a corresponding system disposed at another station, in a sequence having at least one predetermined transmit period followed by a predetermined receive period comprising:
-
means for providing an input signal to be transmitted; means for converting said input signal to a signal having a different frequency; means for delaying the passage of said input signal therethrough for a predetermined time delay which corresponds to a portion of a receive period; means for providing a clock signal to define the sequence of predetermined transmit periods and predetermined receive periods; means connected to the input signal providing means and responsive to the clock signals for sequentially switching said input signal to the delaying means during each receive period and to the frequency converting means during each transmit period; means for summing the switched output of the delaying means and the switched output of the frequency converting means to form a summed signal; means responsive to the clock signal for transmitting the summed signal during each transmit period; means responsive to the clock signal for receiving a summed signal transmitted from another station; means for severing the delayed signal from the received summed signal; means for separating said signal having a different frequency from the received summed signal; means for reconverting said signal having a different frequency to the frequency of the input signal; means for retarding the reconverted signal for a predetermined time of retardation corresponding to the predetermined time delay of the delaying means; means connected to the retarding means and the severing means for reproducing the severed delayed signal during the receive period and the retarded reconverted signal during the subsequent transmit period, whereby the input signal for each receive period and the transmit period subsequent thereto can be transmitted to the other station during each subsequent transmit period as the signal transmitted by the other station and received during a receive period is reproduced during both the receive period and the transmit period subsequent thereto to provide simultaneous transmitting of the input signal and reproducing of the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method adapted for use at one station for simtaneously transmitting and receiving information, with respect to another station, in a sequency having a least one predetermined transmit period followed by a predetermined receive period comprising the steps of:
-
providing an input signal to be transmitted; converting the input signal to a signal having a different frequency; delaying the passage of the input signal for a predetermined time delay which corresponds to a portion of a receive period; providing a clock signal to define the sequence of predetermined transmit periods and predetermined receive periods; switching to the delayed input signal during each receive period and to the frequency converted signal during each transmit period; summing the switched delayed input signal and the switched frequency converted signal to form a summed signal; transmitting the summed signal during each transmit period in response to the clock signal; receiving a summed signal transmitted from another station in response to the clock signal; severing the delayed signal from the received summed signal; separating said signal having a different frequency from the received summed signal; reconverting the different frequency of the separated signal to the frequency of the input signal; retarding the reconverted signal for a predetermined time of retardation corresponding to the predetermined time delay of the delay signal; reproducing the severed delayed signal during the receive period and the retarded reconverted signal during the subsequent transmit period, whereby the input signal for each receive period and the transmit period subsequent thereto can be transmitted to the other station during each subsequent transmit period as the signal transmitted by the other station and received during a receive period is reproduced during both the receive period and the transmit period subsequent thereto to provide simultaneous transmitting of the input signal and reproducing of the received signal.
-
-
19. A system adapted to be disposed at one station for simultaneously transmitting and receiving information, with respect to a corresponding system disposed at another station, in a sequence having at least one predetermined transmit period followed by a predetermined receive period comprising:
-
means for providing an input signal to be transmitted; means for converting the format of the input signal to a signal having a predetermined different format; a first circuit means for delaying the passage of one of the input signal and the different format signal therethrough for a predetermined time delay which corresponds to a portion of a receive period; a second circuit for passing the other of the input signal and the different formal signal; means for providing a clock signal to define the sequence of predetermined transmit periods and predetermined receive periods; means connected to the input signal providing means responsive to the clock signals for sequentially switching the input signal to the first circuit including means during each receive period and to the second circuit during each transmit period; means for summing the switched output of the first circuit and the second circuit to form a summed signal; means responsive to the clock signal for transmitting the summed signal during each transmit period; means responsive to the clock signal for receiving a summed signal transmitted from another station; means for severing the delayed signal of the first circuit from the received summed signal; means for separating the signal of the second circuit from the received summed signal; means for reconverting the format of the signal having a predetermined different format to the format of the input signal; means for retarding the severed delayed signal for a predetermined time of retardation corresponding to the predetermined time delay of the delaying means; means for reproducing the delayed signal from the severing means during the receive period and the signal from the second circuit during the subsequent transmit period after the reconverting and retarding, whereby the input signal for each receive period and the transmit period subsequent thereto can be transmitted to the other station during each subsequent transmit period as the signal transmitted by the other station and received during a receive period is reproduced during both the receive period and the transmit period subsequent thereto to provide simultaneous transmitting of the input signal and reproducing of the received signal.
-
Specification