发明名称 |
Frame synchronization |
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 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 synchronization of received frames of subset-selecting bits is provided by applying a parity check equation to a plurality of possible received frames of subset-selecting bits.
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申请公布号 |
US4807230(A) |
申请公布日期 |
1989.02.21 |
申请号 |
US19870055805 |
申请日期 |
1987.05.29 |
申请人 |
RACAL DATA COMMUNICATIONS INC. |
发明人 |
SRINIVASAGOPALAN, RANGARAJAN;PRUETT, JAMES D. |
分类号 |
H03M13/33;H04L7/04;(IPC1-7):G06F11/10 |
主分类号 |
H03M13/33 |
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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