Abstract: A transmitter is configured to transmit a radio frequency (RF) signal to a receiver. The receiver is configured to receive the RF signal and decode data. Furthermore, a method of wireless communication is provided between the transmitter and the receiver, in which the transmitter transmits to the receiver the RF signal. A carrier phase of the RF signal is randomly converted. The receiver detects an envelope of the RF signal, and extracts data from the RF signal.

Abstract: A device for detecting an interference signal includes an estimator configured to estimate a mean value of received signals output from an analog-digital converter (ADC), a filter configured to filter a low frequency band of the received signals using the estimated mean value to produce filtered received signals, a detector configured to detect, from the filtered received signals, interference signals using a coherent modulation scheme and a non-coherent modulation scheme, and a combiner configured to determine whether interference exists in a frequency channel in response to a result of the interference signal detecting using the coherent modulation scheme and the non-coherent modulation scheme, based on a preset condition.

Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements ?1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.

Abstract: A transmitter is configured to transmit a radio frequency (RF) signal to a receiver. The receiver is configured to receive the RF signal and decode data. Furthermore, a method of wireless communication is provided between the transmitter and the receiver, in which the transmitter transmits to the receiver the RF signal. A carrier phase of the RF signal is randomly converted. The receiver detects an envelope of the RF signal, and extracts data from the RF signal.

Abstract: A transmitter is configured to transmit a radio frequency (RF) signal to a receiver. The receiver is configured to receive the RF signal and decode data. Furthermore, a method of wireless communication is provided between the transmitter and the receiver, in which the transmitter transmits to the receiver the RF signal. A carrier phase of the RF signal is randomly converted. The receiver detects an envelope of the RF signal, and extracts data from the RF signal.

Abstract: An apparatus and method are provided to adaptively set a threshold to detect a transmission symbol. The apparatus and method calculate detection parameters to determine the threshold to detect the transmission symbol based on probability distribution parameters, which determine a statistical probability distribution of an input signal. The apparatus and method adaptively detect a present transmission symbol using a previously detected transmission symbol and the detection parameters.

Abstract: A power reduction method for a multi-path receiver including multi-receivers, includes detecting a state of the multi-receivers, and controlling clock gating or power gating of the multi-receivers based on the state.

Abstract: A method and apparatus provide for stable signal demodulation in a communication system. The method and apparatus includes including detecting an erroneous demodulation value based on backward-demodulation of received signals, using a difference between a received signal to be demodulated and a preceding signal of the received signals and correcting the error demodulation value. Alternatively, backward-demodulation is used to confirm received signals.

Abstract: A tracking method and apparatus of a communication system to prevent a timing difference and bit error rate performance degradation caused by unstable characteristics of a plurality of circuit devices are provided. The tracking method and apparatus include sampling signals received at receiving antennas, tracking sample values resulting from the sampling of the signals, and combining the tracked sample values.

Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements ?1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.

Abstract: A device for detecting an interference signal includes an estimator configured to estimate a mean value of received signals output from an analog-digital converter (ADC), a filter configured to filter a low frequency band of the received signals using the estimated mean value to produce filtered received signals, a detector configured to detect, from the filtered received signals, interference signals using a coherent modulation scheme and a non-coherent modulation scheme, and a combiner configured to determine whether interference exists in a frequency channel in response to a result of the interference signal detecting using the coherent modulation scheme and the non-coherent modulation scheme, based on a preset condition.

Abstract: A method of determining a threshold for symbol detection, includes receiving a most previously input sample value and a result of detecting a most previous symbol, and determining the threshold for the symbol detection of a currently input sample value based on the most previously input sample value and the result of detecting the most previous symbol.

Abstract: A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter. The super-regenerative receiver further includes an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal. The super-regenerative receiver further includes an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal. The super-regenerative receiver further includes a determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency.

Abstract: A method and apparatus provide for stable signal demodulation in a communication system. The method and apparatus includes including detecting an erroneous demodulation value based on backward-demodulation of received signals, using a difference between a received signal to be demodulated and a preceding signal of the received signals and correcting the error demodulation value. Alternatively, backward-demodulation is used to confirm received signals.

Abstract: A method and apparatus provide for stable signal demodulation in a communication system. The method and apparatus includes including detecting an erroneous demodulation value based on backward-demodulation of received signals, using a difference between a received signal to be demodulated and a preceding signal of the received signals and correcting the error demodulation value. Alternatively, backward-demodulation is used to confirm received signals.

Abstract: An ultra low power super-regenerative receiver is provided. The ultra low power super-regenerative receiver includes a bit synchronizer configured to use a value sampled from a signal output from a super-regenerative oscillator to estimate a pulse-level position having a maximum amplitude value in a single period of a received symbol, a frame synchronizer configured to combine a plurality of pulse-level positions determined based on the estimated pulse-level position, and detect a predetermined bit sequence using the plurality of pulse-level positions combined, the frame synchronizer being configured to perform frame synchronization, and a data detector configured to detect data using the plurality of pulse-level positions determined after the frame synchronization is completed.

Abstract: Provided is a method and apparatus to adaptively set a threshold for signal demodulation. The apparatus and the method include adaptively setting a threshold to demodulate a currently received symbol based on the demodulation value of a previously received symbol based on a comparison value. The comparison value is obtained by comparing a number of previously received symbols having a demodulation value of “0” and a number of currently received symbols having a demodulation value of “1”.

Abstract: A method of detecting a bit sequence, includes estimating parameters to be used to determine a probability distribution of a present signal in each of states of a present time, and calculating metrics of the respective states based on the parameters. The method further includes selecting survivor states from the states based on the metrics, and detecting the bit sequence based on a path to each of the survivor states.

Abstract: An ultra-low power super-regenerative receiver and method thereof are provided. The ultra-low power super-regenerative receiver includes a quench waveform generator configured to generate a quench waveform. The ultra-low power super-regenerative receiver further includes a super-regenerative oscillator configured to generate an oscillation signal based on the quench waveform. The ultra-low power super-regenerative receiver further includes a bandwidth adjustor configured to control the quench waveform based on a bandwidth of a signal received by the ultra-low power super-regenerative receiver, to dynamically adjust a bandwidth of the oscillation signal.

Abstract: A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter. The super-regenerative receiver further includes an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal. The super-regenerative receiver further includes an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal. The super-regenerative receiver further includes a determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency.