WIRELESS TRANSCEIVER SYSTEM AND METHOD
First Claim
1. A wireless transceiver system comprising a transmitter and a receiver,the transmitter comprising:
- a first generator configured to generate a clock signal;
a second generator configured to generate fixed data item that has bit values corresponding to the clock signal; and
a third generator configured to perform orthogonal frequency division multiplexing (OFDM) modulation for the fixed data item to generate an OFDM packet,the receiver comprising;
a first detector configured to detect an envelope that indicates amplitude in a time waveform of the OFDM packet to obtain an envelope signal;
a comparator configured to compare the envelope signal with a first threshold to generate a square wave signal;
a second detector configured to detect a head part of the OFDM packet;
a phase-locked loop (PLL) configured to extract a synchronized clock signal from a main frequency component of the square wave signal, the synchronized clock signal being a signal synchronized with the clock signal; and
a controller configured to control to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed, the first period being a period that receiving of at least one OFDM packet has finished.
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Accused Products
Abstract
According to one embodiment, a wireless transceiver system includes a transmitter and a receiver. The transmitter includes a first generator, a second generator, a third generator. The second generator generates fixed data item that has bit values corresponding to the clock signal. The third generator performs OFDM modulation for the fixed data item. The receiver includes a first detector, a second detector, a PLL, a controller. The first detector is configured to detect an envelope that indicates amplitude in a time waveform. The controller is configured to control to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed.
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Citations
15 Claims
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1. A wireless transceiver system comprising a transmitter and a receiver,
the transmitter comprising: -
a first generator configured to generate a clock signal; a second generator configured to generate fixed data item that has bit values corresponding to the clock signal; and a third generator configured to perform orthogonal frequency division multiplexing (OFDM) modulation for the fixed data item to generate an OFDM packet, the receiver comprising; a first detector configured to detect an envelope that indicates amplitude in a time waveform of the OFDM packet to obtain an envelope signal; a comparator configured to compare the envelope signal with a first threshold to generate a square wave signal; a second detector configured to detect a head part of the OFDM packet; a phase-locked loop (PLL) configured to extract a synchronized clock signal from a main frequency component of the square wave signal, the synchronized clock signal being a signal synchronized with the clock signal; and a controller configured to control to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed, the first period being a period that receiving of at least one OFDM packet has finished. - View Dependent Claims (2, 3, 4, 5)
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6. A wireless transceiver method comprising:
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generating a clock signal; generating fixed data item that has bit values corresponding to the clock signal; performing orthogonal frequency division multiplexing (OFDM) modulation for the fixed data item to generate an OFDM packet, detecting an envelope that indicates amplitude in a time waveform of the OFDM packet to obtain an envelope signal; comparing the envelope signal with a first threshold to generate a square wave signal; detecting a head part of the OFDM packet; extracting a synchronized clock signal from a main frequency component of the square wave signal, the synchronized clock signal being a signal synchronized with the clock signal; and controlling to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed, the first period being a period that receiving of at least one OFDM packet has finished. - View Dependent Claims (7, 8, 9, 10)
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11. A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:
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generating a clock signal; generating fixed data item that has bit values corresponding to the clock signal; performing orthogonal frequency division multiplexing (OFDM) modulation for the fixed data item to generate an OFDM packet, detecting an envelope that indicates amplitude in a time waveform of the OFDM packet to obtain an envelope signal; comparing the envelope signal with a first threshold to generate a square wave signal; detecting a head part of the OFDM packet; extracting a synchronized clock signal from a main frequency component of the square wave signal, the synchronized clock signal being a signal synchronized with the clock signal; and controlling to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed, the first period being a period that receiving of at least one OFDM packet has finished. - View Dependent Claims (12, 13, 14, 15)
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Specification