发明名称 |
TDMA Radio system employing BPSK synchronisation for QPSK signals subject to random phase variation and multipath fading. |
摘要 |
<p>A time division multiple access (TDMA) radio system conveying a quadrature phase shift keying (QPSK) modulated data signal is disclosed. In order to overcome multipath distortion and phase variation introduced by the radio channel, a synchronizing portion of a TDMA timeslot is transmitted in only one vector of the QPSK modulation. The system utilizes the one vector synchronizing portion to develop a channel profile estimate which is applied to the received message portion of the QPSK data signal to compensate for the multipath distortion and phase variation during one TDMA timeslot.</p> |
申请公布号 |
EP0318686(A2) |
申请公布日期 |
1989.06.07 |
申请号 |
EP19880117271 |
申请日期 |
1988.10.17 |
申请人 |
MOTOROLA, INC. |
发明人 |
BORTH, DAVID EDWARD;WANG, CHIH-FEI;RABE, DUANE C.;LABEDZ, GERALD PAUL |
分类号 |
H04J3/00;H04L27/22;H04B7/26 |
主分类号 |
H04J3/00 |
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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