摘要:
Disclosed is an apparatus and method for transmitting R-RICH (Reverse Rate Indicator Channel) in a CDMA (Code Division Multiple Access) mobile communication system. There is provided an encoding/decoding apparatus and method for generating optimal codewords for optimal (24,1) encoding to optimal (24,7) encoding, and supporting all of an optimal (24,1) encoder to an optimal (24,7) encoder.
摘要:
A mobile station supporting selective transmit diversity (STD) efficiently transmits forward channel status information to a base station in a 1xEV-DV mobile communication system. The mobile station receives signals transmitted from the base station through a plurality of transmission antennas, measures signal strengths of the received signals, compares the measured signal strengths after compensating for a transmission power difference between the transmission antennas, and selects a transmission antenna having the highest signal strength. The mobile station transmits forward channel status information indicating measured signal strength for a signal transmitted from the selected transmission antenna to the base station along with antenna selection information indicating the selected transmission antenna. The forward channel status information includes absolute status information representing measured signal strength for a transmission antenna selected at a current time interval, or relative status information representing a result obtained by comparing the measured signal strength for the transmission antenna selected at the current time interval with measured signal strength for a transmission antenna selected at a previous time interval.
摘要:
A base station apparatus for controlling power of individual control information transmitted to mobile stations. A first mobile station receives its own control information, and a second mobile station receives its own control information and control information for the first mobile station. A receiver receives information on forward channel conditions of the mobile stations for a previous time period. A channel transmitter transmits individual control information to the first mobile station and the second mobile station for a preset time period. A required transmission power calculator calculates power levels required for transmitting control information to each of the mobile stations for the preset time period taking into consideration the forward channel condition of each of the mobile stations and transmission power used for transmitting control information to each of the mobile stations for the previous time period. A transmission power controller transmits control information for the first mobile station at a higher power level out of the calculated required power levels and transmits control information for the second mobile station at a corresponding power level out of the calculated required power levels.
摘要:
An apparatus for encoding an information bit sequence and generating coded symbols in a communication system which transmits packet data and the information bit sequence for controlling transmission of the packet data. An encoder encodes the information bit sequence at a preset coding rate and outputs coded symbols. A controller controls the encoder so that the encoder outputs the coded symbols when a frame length of the information bit sequence is a first length, and the encoder outputs partial symbols among the coded symbols when the frame length of the information bit sequence is a second length, the second length being shorter than the first length.
摘要:
Disclosed is an apparatus and method for transmitting R-RICH (Reverse Rate Indicator Channel) in a CDMA (Code Division Multiple Access) mobile communication system. There is provided an encoding/decoding apparatus and method for generating optimal codewords for optimal (24,1) encoding to optimal (24,7) encoding, and supporting all of an optimal (24,1) encoder to an optimal (24,7) encoder.
摘要:
An apparatus for encoding an information bit sequence and generating coded symbols in a communication system which transmits packet data and the information bit sequence for controlling transmission of the packet data. An encoder encodes the information bit sequence at a preset coding rate and outputs coded symbols. A controller controls the encoder so that the encoder outputs the coded symbols when a frame length of the information bit sequence is a first length, and the encoder outputs partial symbols among the coded symbols when the frame length of the information bit sequence is a second length, the second length being shorter than the first length.
摘要:
Disclosed is an apparatus for encoding k consecutive inputs indicating a TFCI (Transport Format Combination Indicator) of each of successively transmitted frames into a sequence of m symbols in an NB-TDD (Narrowband-Time Division Duplex) mobile communication system. An encoder encodes the k input bits into a sequence of at least 2 n symbols where 2 n >m, using an extended Reed-Muller code from a Kasami sequence. A puncturer performs puncturing on the sequence of 2 n symbols from the encoder so as to output a sequence of m symbols.