发明名称 |
Frequency error detecting device capable of correctly detecting a frequency error between a carrier frequency and a standard frequency. |
摘要 |
<p>Supplied with a transmitted signal defined by a sequence signal vectors each of which has a phase variation equal to a predetermined phase variation. A demodulator (11) quadrature demodulates a transmitted signal into a demodulated signal with reference to a standard signal of a standard frequency. The demodulated signal is defined by a sequence of demodulated vectors. An A/D section (21, 22) samples the demodulated vectors at a predetermined sampling rate to quantize the demodulated vectors into quantized vectors. A signal processor (31) compounds a composite vector from the quantized vectors within a predetermined number of the quantized vectors. The signal processor calculates a phase difference between the composite vector and a predetermined vector to detect a frequency error between the standard frequency and a carrier frequency of the transmitted signal. <IMAGE></p> |
申请公布号 |
EP0599300(A1) |
申请公布日期 |
1994.06.01 |
申请号 |
EP19930118940 |
申请日期 |
1993.11.24 |
申请人 |
NEC CORPORATION |
发明人 |
MUTO, HIROYASU, C/O NEC CORPORATION |
分类号 |
H04L27/22;(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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