发明名称 |
Soft decision digital communication apparatus |
摘要 |
An apparatus for performing a soft decision function prior to convolutional decoding in a data communication system using differential quadrature-PSK or other transmission schemes is disclosed. A memory element coupled between a demodulator and the convolutional decoder in a receiver portion of the communications system performs the soft decision function. The memory element contains data organized using probability of occurrence and Log-Likelihood parameters for each potential combination of current and past received signal modulation quantized at a predetermined level.
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申请公布号 |
US4742533(A) |
申请公布日期 |
1988.05.03 |
申请号 |
US19870000232 |
申请日期 |
1987.01.02 |
申请人 |
MOTOROLA, INC. |
发明人 |
WEIDNER, MICHAEL Y.;DURKIN, MICHAEL F. |
分类号 |
H04L1/00;H04L25/06;H04L27/227;(IPC1-7):H03K9/04 |
主分类号 |
H04L1/00 |
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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