发明名称 |
MODEM AND METHOD USING MULTIDIMENSIONAL CODED MODULATION |
摘要 |
Disclosed is a modem including a transmitter having a convolutional encoder for transforming each group interval digital data into an expanded bit sequence having symbol-selecting bits and a frame of subset-selecting bits forming a plurality of bit groups, with each bit group designating a 2-dimensional subset and the symbol-selecting bits being used to select one 2-dimensional symbol from each of the selected subsets, the transmitter further providing modulation of a carrier signal, and a receiver wherein a commonality-seeking, branch cost calculator determines the candidate branch associated with the minimum cost N-dimensional symbol subset for each coset and a Viterbi decoder which determines the maximum likelihood path from a plurality of surviving paths formed from branches selected from the candidate branches. |
申请公布号 |
CA1295741(C) |
申请公布日期 |
1992.02.11 |
申请号 |
CA19880556101 |
申请日期 |
1988.01.08 |
申请人 |
RACAL DATA COMMUNICATIONS INC. |
发明人 |
SRINIVASAGOPALAN, RANGARAJAN;PRUETT, JAMES D.;KRISHNAN, VEDAVALLI G.;FARIAS, LUIS V. |
分类号 |
H03M13/23;H03M13/25;H04L1/00;H04L27/34 |
主分类号 |
H03M13/23 |
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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