发明名称 |
Phase encoding methods for handling multiple phase modulated signals on a single channel |
摘要 |
A method for phase encoding DPSK and N-PSK which maintains phase continuity and which does not require any reference symbols when using N-PSK. A sequence of known DPSK phases are encoded with respect to an initial phase. The N-PSK phases are then all offset by this same initial phase. The known DPSK phases can be used at a receiver to determine a sum consisting of the initial phase and any further phase shift introduced by the channel, and this sum is used to decode the unknown N-PSK phases. The method is more generally applicable to any case where a switch between a phase encoding method which requires an absolute phase reference and a phase encoding method which does not have an absolute phase reference is to be implemented on a single carrier or channel.
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申请公布号 |
US6445745(B1) |
申请公布日期 |
2002.09.03 |
申请号 |
US19990306434 |
申请日期 |
1999.05.06 |
申请人 |
NORTEL NETWORKS LIMITED |
发明人 |
BONTU CHANDRA S.;GU YONGHAI;KULARATNA SHAVANTHA;BARANY PETER |
分类号 |
H04L27/00;H04L27/18;(IPC1-7):H04L27/18 |
主分类号 |
H04L27/00 |
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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