发明名称 |
METHOD FOR PROCESSING RECEIVED PHASE MODULATING SIGNAL IN WIRELESS COMMUNICATION SYSTEM |
摘要 |
PROBLEM TO BE SOLVED: To create and measure an event provided with a continuing time for only several nano-seconds by stipulating a symbol transition time between symbols by a frequency measurement value. SOLUTION: The second copy of a quadrature phase shift keyed(QPSK) signal passes through a frequency modulator (FM demodulator) 120 to create the measurement value of an instantaneous frequency of the signal. A peak detector 124 catches a peak in a frequency output and creates a signature. A digital signal processor 126 gives a proper signature signal (signature event) to a call processor 128, demodulates a time slot symbol in a T/2 symbol period and obtains phase transition between the two prescribed symbols. The processor 126 monitors a T/2 window and catches the occurrence of the peak. The call processor 128 receives the signature event and seals a time stamp on it. The demodulated inter-symbol transition time is stipulated based on the frequency measurement value.
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申请公布号 |
JP2001086181(A) |
申请公布日期 |
2001.03.30 |
申请号 |
JP20000224391 |
申请日期 |
2000.07.25 |
申请人 |
LUCENT TECHNOL INC |
发明人 |
GORDON ALEXANDER;TSAI SHENG-JEN;MATUSEVICH ALEX;TOBIAS JONATHAN M;WANG ROBERT C |
分类号 |
H04L27/22;G01S1/04;G01S5/10;H04B7/26;H04J3/00;H04L27/14;H04Q7/34;(IPC1-7):H04L27/22 |
主分类号 |
H04L27/22 |
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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