Adaptive HF communication system
First Claim
1. A high frequency (HF) communication system with at least two stations and wherein each station has a discrete address, a transmitter, a receiver, a radio control unit for controlling the operation of the transmitter, the receiver and to receive a discrete address of a station that is to be called and an adaptive communication processor means for selecting the preferred frequency for transmitting at least a preselected message format between the stations and wherein the adaptive communication processor means, comprises:
- PTTK means for placing the station in a transmit mode;
timing and control means for sequentially tuning the receiver through a group of N channels when the station is not in the transmit mode and where N is the number of alternate communication channels with each channel having a preselected frequency and bandwidth, the timing and control means causes the receiver at each channel to listen for the discrete address for a preselected period of time;
link quality means for measuring a link quality of each channel that the receiver is tuned to including, signal-to-noise detector means for obtaining a signal-to-noise factor-error rate detector means for obtaining a bit error factor for each channel-and combining means for combining the signal-to-noise factor and the bit error factor to obtain the link quality of each channel that the receiver is tuned to;
address detection means for detecting the discrete address of the station that transmitted a message on the channel to which the receiver is tuned;
storage means for storing the link quality of each channel by detected discrete address; and
channel selector means for selecting the channel with the best link quality for the discrete address when the station is placed in the transmit mode.
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Abstract
A high frequency communication system has at least two stations with each station having a discrete address, a transmitter, a receiver and a means for selecting the preferred frequency for transmitting at least a preselected format between the station includes a means for sequentially tuning the receiver through a group of channels with each channel having a preselected frequency and bandwidth, a means for measuring the link quality of each channel that is received according to the discrete address of the station transmitting the message. After the link quality is measured it is stored in a link quality matrix according to the channel and address of the station transmitting the message, so that when transmission is initiated by the station receiving the message it may select the channel with the best link quality and initiate transmission on that channel if it is available.
99 Citations
12 Claims
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1. A high frequency (HF) communication system with at least two stations and wherein each station has a discrete address, a transmitter, a receiver, a radio control unit for controlling the operation of the transmitter, the receiver and to receive a discrete address of a station that is to be called and an adaptive communication processor means for selecting the preferred frequency for transmitting at least a preselected message format between the stations and wherein the adaptive communication processor means, comprises:
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PTTK means for placing the station in a transmit mode; timing and control means for sequentially tuning the receiver through a group of N channels when the station is not in the transmit mode and where N is the number of alternate communication channels with each channel having a preselected frequency and bandwidth, the timing and control means causes the receiver at each channel to listen for the discrete address for a preselected period of time; link quality means for measuring a link quality of each channel that the receiver is tuned to including, signal-to-noise detector means for obtaining a signal-to-noise factor-error rate detector means for obtaining a bit error factor for each channel-and combining means for combining the signal-to-noise factor and the bit error factor to obtain the link quality of each channel that the receiver is tuned to; address detection means for detecting the discrete address of the station that transmitted a message on the channel to which the receiver is tuned; storage means for storing the link quality of each channel by detected discrete address; and channel selector means for selecting the channel with the best link quality for the discrete address when the station is placed in the transmit mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of providing high frequency (HF) communications between at least two stations and wherein each station has a discrete address, a transmitter, a receiver, including a method for selecting the preferred frequency, comprises:
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sequentially tuning the receiver through a group of N channels where N is the number of alternate communication channels with each channel having a preselected frequency and bandwidth; detecting the discrete address of the station that transmitted a message on the channel to which the receiver is tuned; measuring the link quality of each channel including the steps of;
obtaining a signal-to-noise factor-obtaining a bit error rate factor and combining the signal-to-noise factor with the bit error rate factor to obtain the link quality of the communication channel that the receiver is tuned to;storing the link quality of each channel by discrete address; and selecting the channel with the best link quality when a transmission is initiated to an addressed remote station.
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Specification