Transmitting device and transmitting method
A transmitting device that transmits a FSK-modulated wireless signal to a receiving device includes a controller that determines a transmitting content transmitted to the receiving device and a value of a maximum frequency shift in the FSK modulation, and outputs output information including the transmitting content, the value of the maximum frequency shift, and a value of a center frequency in the FSK modulation; a generator that generates a FSK modulation signal based on the transmitting content, the value of the maximum frequency shift, and the value of the center frequency, which are output from the controller; and a transmitting antenna that transmits the FSK modulation signal, which is generated by the generator, in a form of a wireless signal.
1. A transmitting device that transmits a FSK-modulated wireless signal to a receiving device, comprising:
a controller that determines a transmitting content transmitted to the receiving device and a value of a maximum frequency shift in the FSK modulation, and outputs output information including the transmitting content, the value of the maximum frequency shift, and a value of a center frequency in the FSK modulation;
a generator that generates a FSK modulation signal based on the transmitting content, the value of the maximum frequency shift, and the value of the center frequency, which are output from the controller; and
a transmitting antenna that transmits the FSK modulation signal, which is generated by the generator, in a form of a wireless signal,
wherein when the identical transmitting content is transmitted to the receiving device a plurality of times, the controller determines the identical transmitting content, the identical value of the center frequency, and different values of the maximum frequency shifts for the transmissions of the plurality of times, and outputs a plurality of pieces of information which include the identical transmitting content, the identical values of the center frequency, and the different values of the maximum frequency shifts at different times, and
wherein the transmitting antenna transmits the FSK modulation signals a plurality of times, in the form of the wireless signals, with the identical value of the center frequency and different values of the maximum frequency shifts.
2. The transmitting device according to claim 1 , wherein the controller outputs the output information including the maximum frequency shifts having the alternately-different values, when the identical transmitting content is transmitted to the receiving device.
3. The transmitting device according to claim 2 , further comprising an amplifier,
wherein the controller includes:
a voltage detector that detects a supply voltage of a power supply; and
a signal intensity determination unit that determines signal intensity of the FSK modulation signal based on a value of the supply voltage detected by the voltage detector,
wherein the controller outputs the output information further including the value of the signal intensity determined by the signal intensity determination unit, the generator sets the value of the signal intensity to the amplifier, and the transmitting antenna transmits the FSK modulation signal in the form of the wireless signal at the signal intensity set to the amplifier.
4. The transmitting device according to claim 1 , further comprising an amplifier,
wherein the controller includes:
a voltage detector that detects a supply voltage of a power supply; and
a signal intensity determination unit that determines signal intensity of the FSK modulation signal based on a value of the supply voltage detected by the voltage detector,
wherein the controller outputs the output information further including the value of the signal intensity determined by the signal intensity determination unit, the generator sets the value of the signal intensity to the amplifier, and the transmitting antenna transmits the FSK modulation signal in the form of the wireless signal at the signal intensity set to the amplifier.
5. A transmitting method for transmitting a transmitting content in a form of a FSK-modulated wireless signal to a receiving device at least twice, comprising:
performing predetermined FSK modulation on the transmitting content to transmit the transmitting content based on a value of a center frequency in the FSK modulation and a value of one of maximum frequency shifts;
performing the predetermined FSK modulation on the transmitting content to transmit the transmitting content based on the value of the center frequency in the FSK modulation and a value of the other maximum frequency shift;
determining, when the identical transmitting content is transmitted to the receiving device a plurality of times, the identical transmitting content, the identical value of the center frequency, and different values of the maximum frequency shifts for the transmissions of the plurality of times,
outputting a plurality of pieces of information which include identical transmitting content, identical values of the center frequency, and the different values of maximum frequency shifts at different times; and
transmitting the FSK modulation signals a plurality of times, in the form of wireless signals, with the identical value of the center frequency and different values of the maximum frequency shifts.