Abstract: The present disclosure provides a method of selecting a plurality of sets of beam pairs in a wireless communication system.

Abstract: The present disclosure provides a method of selecting a plurality of sets of optimal beam pairs in a wireless communication system. The method includes estimating channels associated with a plurality of transmit ports for each receive port from a plurality of receiver ports. Further, the method includes selecting the plurality of optimal transmit and receive beam pairs using average power level computation and capacity maximization techniques.

Abstract: Apparatuses and methods of transmitting a signal with reduced interference in a femto base station including a plurality of antennas having different radiation patterns are provided. A method includes transmitting common information through the plurality of antennas having the different radiation patterns; receiving feedback information corresponding to the common information; analyzing the feedback information; temporarily selecting one of the plurality of antennas as a transmission antenna, based on a result of the analyzing; and transmitting user information through the transmission antenna.

Abstract: Apparatuses and methods of transmitting a signal with reduced interference in a femto base station including a plurality of antennas having different radiation patterns are provided. A method includes transmitting common information through the plurality of antennas having the different radiation patterns; receiving feedback information corresponding to the common information; analyzing the feedback information; temporarily selecting one of the plurality of antennas as a transmission antenna, based on a result of the analyzing; and transmitting user information through the transmission antenna.

Abstract: A method for searching an excitation (or fixed) codebook in a speech coding system. In a speech coding system including a synthesis filter for synthesizing a speech signal, a fixed codebook searcher according to the present invention segments a speech signal frame into a plurality of subframes to generate an excitation signal to be used in a synthesis filter, segments again each of the subframes into a plurality of subgroups, and searches the respective subframes each comprised of a plurality of pulse position/amplitude combinations for pulses. The fixed codebook searcher searches the respective subgroups for a predetermine number of pulses having non-zero amplitude, and generates the searched pulses as an initial vector. Next, the fixed codebook searcher selects a pulse combination including at least one pulse among the pulses of the initial vector, and then substitutes pulses of the selected pulse combination for pulses in other positions in the subgroups.

Abstract: A method for searching an excitation (or fixed) codebook in a speech coding system. In a speech coding system including a synthesis filter for synthesizing a speech signal, a fixed codebook searcher according to the present invention segments a speech signal frame into a plurality of subframes to generate an excitation signal to be used in a synthesis filter, segments again each of the subframes into a plurality of subgroups, and searches the respective subframes each comprised of a plurality of pulse position/amplitude combinations for pulses. The fixed codebook searcher searches the respective subgroups for a predetermine number of pulses having non-zero amplitude, and generates the searched pulses as an initial vector. Next, the fixed codebook searcher selects a pulse combination including at least one pulse among the pulses of the initial vector, and then substitutes pulses of the selected pulse combination for pulses in other positions in the subgroups.

Abstract: A method for searching an excitation (or fixed) codebook in a speech coding system. In a speech coding system including a synthesis filter for synthesizing a speech signal, a fixed codebook searcher according to the present invention segments a speech signal frame into a plurality of subframes to generate an excitation signal to be used in a synthesis filter, segments again each of the subframes into a plurality of subgroups, and searches the respective subframes each comprised of a plurality of pulse position/amplitude combinations for pulses. The fixed codebook searcher searches the respective subgroups for a predetermine number of pulses having non-zero amplitude, and generates the searched pulses as an initial vector. Next, the fixed codebook searcher selects a pulse combination including at least one pulse among the pulses of the initial vector, and then substitutes pulses of the selected pulse combination for pulses in other positions in the subgroups.