摘要:
An apparatus and method for determining feedback information detection in a broadband wireless communication system are provided. In the detection determining apparatus, a demodulator correlates each of tiles carrying received feedback information with an orthogonal vector including a pilot symbol in each possible codeword, each tile being a predetermined number of subcarriers, and calculates the squares of the absolute values of the correlations. A codeword correlation calculator sums the squares of the absolute value of the correlations of the tiles for each possible codeword. A detection decider determines whether to perform detection on the feedback information based on the maximum of the sums.
摘要:
An apparatus and method for determining feedback information detection in a broadband wireless communication system are provided. In the detection determining apparatus, a demodulator correlates each of tiles carrying received feedback information with an orthogonal vector including a pilot symbol in each possible codeword, each tile being a predetermined number of subcarriers, and calculates the squares of the absolute values of the correlations. A codeword correlation calculator sums the squares of the absolute value of the correlations of the tiles for each possible codeword. A detection decider determines whether to perform detection on the feedback information based on the maximum of the sums.
摘要:
An apparatus and method for detecting a feedback signal in a multi-cell or multi-sector sector BS in a broadband wireless communication system are provided. A demodulator correlates each tile being sets of subcarriers carrying feedback information received from a serving sector/cell with each possible codeword and calculates the squares of the absolute values of the correlations of the tiles for each possible codeword. A first detection decider sums the squares for each possible codeword and determines whether to perform detection on the received feedback information. If it is impossible to detect the feedback information, a second detection decider receives feedback information from a target sector/cell, combines the feedback information received from the serving sector/cell and the target sector/cell, and determines whether to detect the combined feedback information.
摘要:
An apparatus and method for estimating the CINR of an uplink channel in a broadband wireless communication system are provided, in which tiles being subcarrier sets are separated from a feedback signal received on the uplink channel. All symbols included in the tiles of the feedback signal are correlated with each of codewords, the absolute values of the correlations are squared for the each codeword and summed, a codeword with a maximum sum from among the codewords is selected. Received power level and noise power level are calculated using all the symbols included in the tiles of the feedback signal correlated with the codeword with the maximum sum, and the CINR of the uplink channel is estimated using the received power and the noise power levels.
摘要:
An apparatus and method for receiving data in a communication system are provided. The method includes identifying first codewords, which have been used in transmission of data by a transmitter, in the data received from the transmitter, setting third codewords by adding second codewords to the identified first codewords, calculating correlation values of orthogonal vectors corresponding to the third codewords and detecting information included in the data based on the calculated correlation values. Accordingly, feedback information may be better received and detected.
摘要:
An apparatus and method for estimating the CINR of an uplink channel in a broadband wireless communication system are provided, in which tiles being subcarrier sets are separated from a feedback signal received on the uplink channel. All symbols included in the tiles of the feedback signal are correlated with each of codewords, the absolute values of the correlations are squared for the each codeword and summed, a codeword with a maximum sum from among the codewords is selected. Received power level and noise power level are calculated using all the symbols included in the tiles of the feedback signal correlated with the codeword with the maximum sum, and the CINR of the uplink channel is estimated using the received power and the noise power levels.
摘要:
Provided is an outer loop power control apparatus and method for a signal transmitter in a communication system. The outer loop power control method includes determining a first setpoint of a kth frame according to whether or not an error occurs in a (k−1)th frame, updating a second setpoint of the kth frame with the first setpoint of the kth frame if a difference value between the first setpoint of the kth frame and a second setpoint of the (k−1)th frame is greater than a first reference value, and transmitting a transmit power control message to a signal receiver at the kth frame if the difference value between first setpoint of the kth frame and the second setpoint of the (k−1)th frame is greater than a second reference value.
摘要:
Disclosed is a method for receiving a signal by a receiver in a communication system, the method includes receiving a signal; estimating a first noise value by using a reference signal included in the received signal; estimating a second noise value by using at least one subcarrier which has been unused for a transmission of data and the reference signal; and when a difference between the estimated first noise value and the estimated second noise value is greater than a threshold value, demodulating the data by using an interference removal algorithm.
摘要:
Disclosed is a method for receiving a signal by a receiver in a communication system, the method includes receiving a signal; estimating a first noise value by using a reference signal included in the received signal; estimating a second noise value by using at least one subcarrier which has been unused for a transmission of data and the reference signal; and when a difference between the estimated first noise value and the estimated second noise value is greater than a threshold value, demodulating the data by using an interference removal algorithm.
摘要:
Provided is an outer loop power control apparatus and method for a signal transmitter in a communication system. The outer loop power control method includes determining a first setpoint of a kth frame according to whether or not an error occurs in a (k−1)th frame, updating a second setpoint of the kth frame with the first setpoint of the kth frame if a difference value between the first setpoint of the kth frame and a second setpoint of the (k−1)th frame is greater than a first reference value, and transmitting a transmit power control message to a signal receiver at the kth frame if the difference value between first setpoint of the kth frame and the second setpoint of the (k−1)th frame is greater than a second reference value.