发明名称 |
DATA TRANSMITTING METHOD, DATA TRANSMITTING SYSTEM, TRANSMITTER, AND RECEIVER |
摘要 |
<p>A data transmitting method by which high-quality variable-rate data transmission can be realized by executing rate discrimination more surely, a data transmitting system, a transmitter, and a receiver. In the variable-rate transmitting method in which variable-length transmitting data are transmitted by housing the data in frames each having a fixed time length, the transmission side transmits user data by adding an error detecting code to the data and the reception side performs viterbi decoding up to the final bit position of transmittable frame data by successively assuming the final bit position. When the difference between the maximum likelihood of a plurality of candidate decoded data sequences and the likelihood of a decoded data sequence obtained by terminating a decoding process falls within a fixed range and it is confirmed that a calculated detecting code coincides with a received error detecting code by comparison, transmitted data are decoded by discriminating that the assumed final bit position is the final bit position of the transmitted frame data.</p> |
申请公布号 |
WO9750219(A1) |
申请公布日期 |
1997.12.31 |
申请号 |
WO1997JP02145 |
申请日期 |
1997.06.23 |
申请人 |
NTT MOBILE COMMUNICATIONS NETWORK INC.;OKUMURA, YUKIHIKO;ADACHI, FUMIYUKI |
发明人 |
OKUMURA, YUKIHIKO;ADACHI, FUMIYUKI |
分类号 |
H03M13/00;H04L1/00;H04L12/70;H04L25/02;H04W28/04;H04W72/04;(IPC1-7):H04L29/02;H03M7/40;H03M13/12;H04L12/56 |
主分类号 |
H03M13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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