초록 ▼

The invention provides a variable bit rate discrimination method and apparatus wherein a transmission bit rate of data received by a mobile station in a mobile communication which employs a spectrum spreading method can be discriminated readily to realize reduction in time required for decoding proc

The invention provides a variable bit rate discrimination method and apparatus wherein a transmission bit rate of data received by a mobile station in a mobile communication which employs a spectrum spreading method can be discriminated readily to realize reduction in time required for decoding processing and miniaturization in circuit scale. A variable bit rate including four different transmission bit rates is used as a transmission rate of a traffic channel from a base station to a mobile station, and transmission data are encoded using convolutional encoder for error correction and transmitted. In the mobile station, received data are decoded for the four individual transmission bit rates using Viterbi decoders to obtain path metric values which are sum totals of errors of the received data. Then, one of the transmission bit rates which exhibits a lowest one of the path metric values is selected as a bit rate used for transmission of the transmission data. Consequently, after Viterbi decoding, no further encoding is required.

대표청구항 ▼

A method of discriminating a variable bit rate in a mobile communication system, wherein four transmission bit rates are used for a transmission rate of a traffic channel from a base station to a mobile station and transmission data are encoded using a convolutional encoder for error correction and

A method of discriminating a variable bit rate in a mobile communication system, wherein four transmission bit rates are used for a transmission rate of a traffic channel from a base station to a mobile station and transmission data are encoded using a convolutional encoder for error correction and are transmitted, the method comprising the steps of: decoding, in the mobile station, received data for the four individual transmission bit rates using Viterbi decoders to obtain path metric values which are sum totals of errors of the received data, together with results of decoding for the transmission bit rates; comparing the four path metric values in magnitude with each other; and selecting one of the four transmission bit rates which exhibits a lowest path metric value as a bit rate at which the transmission data have been transmitted.