发明名称 |
Differential detection systems with non-redundant error correction |
摘要 |
The differential detection system comprises a demodulator for a modulated carrier transmission system for binary signals, in which a symbol detected from the phase difference between the received signal delayed by one signaling interval and the signal received in the present signaling interval is converted into data and a symbol detected from the phase difference between the received signal delayed by two signaling intervals and a signal received in the present signaling interval is converted into parity. The data and the parity are applied to a decoder for a rate 1/2 single error correcting self-orthogonal convolutional code effecting demodulation with non-redundant error correction. The correction system is also applicable to demodulate a carrier wave modulated by m (an integer) level digital data.
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申请公布号 |
US4128828(A) |
申请公布日期 |
1978.12.05 |
申请号 |
US19770836759 |
申请日期 |
1977.09.26 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORP. |
发明人 |
SAMEJIMA, SHUICHI;HIRADE, KENKICHI |
分类号 |
H04L27/18;H04L27/233;(IPC1-7):G06F11/12 |
主分类号 |
H04L27/18 |
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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