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US 8,300,676 B2Granted
Apparatus and method for communication
AssigneeElectronics and Telecommunications Research Institute
InventorsCheol-Ho Shin, Byoung Hak Kim, Jong Won Kim, Sangsung Choi, Kwang Roh Park
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Abstract
A communication apparatus generates a digital detection signal including a plurality of time symbols by digital-converting a detection signal corresponding to a received signal, estimates an average power value of the detection signal by calculating average power of the digital detection signal based on the digital detection signal, and performs UWB communication through a predetermined first channel when a predetermined reference power value is greater than the average power value.
Claims14
A communication method for ultra-wide band (UWB) communication, comprising:
- generating a digital detection signal including a plurality of time symbols by digital-converting a detection signal corresponding to a received signal;
- estimating an average power value of the detection signal by calculating average power of the digital detection signal based on the digital detection signal;
- and
- when a predetermined reference power value is greater than the average power value, performing UWB communication through a predetermined first channel, wherein the first channel comprises a plurality of subcarriers;
- and
- when the average power value is greater than the reference power value,
- generating location information that corresponds to information on a subcarrier where an interfered signal exists by detecting a location of the interfered signal based on the digital detection signal;
- and
- performing UWB communication through a part of the plurality of subcarriers included in the first channel, excluding a subcarrier corresponding to the information,
- wherein the generating of the location information comprises:
- Fourier-transforming N time symbols among a plurality of time symbols included in the digital detection signal to generate N frequency symbols respectively corresponding to the N time symbols;
- generating a plurality of sample sums respectively corresponding to a plurality of subcarriers according to a predetermined detection bandwidth based on the N frequency symbols;
- performing operation for adding an absolute value of a real number and an absolute value of an imaginary number of each sample sum based on the plurality of sample sums to generate a plurality of sample absolute values respectively corresponding to the plurality of sample sums;
- generating a reference value for determining existence of the interfered signal based on the plurality of sample absolute values;
- and
- generating first location information corresponding to information on a subcarrier where the interfered signal exists among the plurality of subcarriers according to the detection bandwidth by comparing each of the plurality of sample absolute values with the reference value.
13 more elements
A communication apparatus for performing ultra-wideband (UWB) communication, comprising:
- a module for detecting a signal component corresponding to a first channel for UWB communication from a signal received for a predetermined time period, and outputting a detection signal by amplifying the detected signal component;
- a converter for digital-converting the detection signal and outputting a digital detection signal, wherein the digital detection signal comprises a plurality of time symbols;
- a controller for estimating an average power value of the detection signal based on the digital detection signal, determining existence of an interfered signal from the first channel through the average power value, and applying a detection and avoid (DAA) method according to the determination result;
- and
- a communication unit for performing UWB communication according to control of the controller,
- wherein the controller comprises:
- a data arranging unit for outputting a first group of time symbols from the plurality of time symbols in parallel;
- and
- a power calculation unit for calculating average power of the first group of time symbols based on the first group of time symbols and outputting the average power value.
6 more elements
A communication apparatus for performing ultra-wideband (UWB) communication, comprising:
- a module for detecting a signal component corresponding to a first channel for UWB communication from a signal received for a predetermined time period, and outputting a detection signal by amplifying the detected signal component;
- a converter for digital-converting the detection signal and outputting a digital detection signal, wherein the digital detection signal comprises a plurality of time symbols;
- a controller for estimating an average power value of the detection signal based on the digital detection signal, determining existence of an interfered signal from the first channel through the average power value, and applying a detection and avoid (DAA) method according to the determination result;
- and
- a communication unit for performing UWB communication according to control of the controller,
- wherein the controller generates information on a subcarrier where the interfered signal exists in a frequency domain when the interfered signal is detected from the first channel, and the communication unit performs UWB communication through the first channel by using a tone-nulling method corresponding to the information, and
- wherein the controller comprises:
- a data arranging unit for outputting a first group of time symbols from the plurality of time symbols in parallel;
- and
- a location tracking unit for generating the information based on a plurality of frequency symbols that respectively correspond to the first group of time symbols.
7 more elements
Dependencies are inferred from the claim text.