Communication device and signal demodulation method
AssigneeOMRON Corporation
InventorsYusuke Miwa, Tatsuo Yoshida
Life of this patent
Estimating the term…
Abstract
A communication device (10) includes a reception part (20) demodulating a signal subjected to frequency shift keying by using binary values. The reception part has: a detection part, detecting a first bit, which is one of high and low bits along a time line; and an estimation part, estimating presence of a second bit based on a length of the ongoing time during which the first bit cannot be detected.
Claims15
A communication device, comprising:
- a reception part, demodulating a signal subjected to frequency shift keying by using a high bit and a low bit that are binary values,
- wherein the reception part has:
- a detection part, detecting a first bit, which is one of the high bit and the low bit, from the signal that is received along a time line;
- and
- an estimation part, estimating presence of a second bit, which is a bit different from the first bit, based on a length of an ongoing time during which the detection part is unable to detect the first bit.
A communication device, comprising:
- a reception part, demodulating a signal subjected to frequency shift keying by using a high bit and a low bit that are binary values,
- wherein the reception part has:
- a high bit detection part, detecting the high bit along a time line from the signal that is received;
- a low bit estimation part, estimating presence of the low bit and outputting a first bit string in which the signal is temporarily demodulated based on a length of an ongoing time during which the high bit detection part is unable to detect the high bit;
- a low bit detection part, detecting the low bit along the time line from the signal that is received;
- a high bit estimation part, estimating presence of the high bit and outputting a second bit string in which the signal is temporarily demodulated based on a length of an ongoing time during which the low bit detection part is unable to detect low bits;
- a demodulation part, outputting a third bit string in which the signal is temporarily demodulated from the signal that is received;
- and
- a bit determination part, determining a bit string in which the signal is demodulated through comparison among the first bit string, the second bit string, and the third bit string.
A signal demodulation method for demodulating a signal subjected to frequency shift keying by using a high bit and a low bit that are binary values, the signal demodulation method comprising:
- a step of detecting a first bit, which is one of the high bit and the low bit, from the signal along a time line;
- and
- a step of estimating presence of a second bit, which is a bit different from the first bit, based on a length of an ongoing time during which the first bit is unable to be detected.
Dependencies are inferred from the claim text.