发明名称 |
Method for demodulating information in a communication system that supports multiple modulation schemes |
摘要 |
A method of demodulating voice or data and control information in systems that support multiple modulation schemes modulates voice or data using a first linear modulation scheme, such as 16QAM modulation scheme, and modulates control information using a second linear modulation scheme, for example, QPSK modulation scheme, that has the same symbol rate as that of the first modulation scheme. The first linear modulation scheme has a higher modulation level than the second linear modulation scheme. Information modulated using the second linear modulation scheme, which uses a reduced signal set of the first linear modulation scheme, are demodulated using the same demodulator that is used for demodulating information modulated using the first linear modulation scheme. Also, in-band signalling information within a traffic channel, such as stealing flags, are modulated using the second modulation scheme.
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申请公布号 |
US6125148(A) |
申请公布日期 |
2000.09.26 |
申请号 |
US19970921374 |
申请日期 |
1997.08.29 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
FRODIGH, CARL MAGNUS;HOOK, MIKAEL;MUELLER, FRANK;SCHRAMM, PETER;SKOELD, JOHAN |
分类号 |
H04L27/18;H04J3/00;H04L1/00;H04L27/34;H04Q7/38;(IPC1-7):H04L23/02;H04L5/12;H03D3/00;H03K9/10 |
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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