发明名称 |
Demodulator circuit and demodulating method employing bit error rate monitor |
摘要 |
A demodulator circuit and a demodulating method are disclosed. A demodulator including a phase-locked loop for a receive carrier recovery or a phase lock recovery demodulates an input received signal and a band of a loop filter of the phase-locked loop is controlled by a control signal. A bit error rate monitor detects a bit error rate of a demodulated outputs the control signal on the basis of the bit error rate result of the demodulator, and a loop filter band controller output from the bit error rate monitor. Hence, the bit error rate of the demodulated signal is detected and the loop filter band of the phase-locked loop of the demodulator is controlled based on the detected bit error rate. As a result, an exact control of the loop filter band of the demodulator can be performed on the basis of the received signal state without using any received signal power detector, any C/N detector or the like.
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申请公布号 |
US5455536(A) |
申请公布日期 |
1995.10.03 |
申请号 |
US19940180120 |
申请日期 |
1994.01.12 |
申请人 |
NEC CORPORATION |
发明人 |
KONO, SHINICHI;OKUI, TAMIO |
分类号 |
H03D9/00;H03D1/00;(IPC1-7):H04L27/06;H04L27/22 |
主分类号 |
H03D9/00 |
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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