发明名称 |
Method and apparatus for detecting in-band interference in a data communications modem |
摘要 |
A method and apparatus for detection and analysis of interference and noise in a received signal within a bandwidth of a predetermined communication channel. A receiver receives a modulated signal and generates a demodulated digital baseband signal. A digital quadrature demodulator receives the digital baseband data signal and demodulates the digital baseband data signal to generate complex digital signal soft-symbol decisions at its output at the received symbol rate. A processor interface in communication with the digital quadrature demodulator and the controller transfers data between the digital quadrature demodulator and the controller. The controller reconstructs a transmitted signal from the transferred data and subtracts the transmitted signal from the modulated signal to generate a third signal representative of noise and interference underlying the transmitted signal within a predetermined communications channel containing the transmitted signal. The modulated and third signals are displayed on a computer screen or a printout.
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申请公布号 |
US8351495(B2) |
申请公布日期 |
2013.01.08 |
申请号 |
US20090557177 |
申请日期 |
2009.09.10 |
申请人 |
TELEDYNE PARADISE DATACOM, LLC;SKEET DAVID |
发明人 |
SKEET DAVID |
分类号 |
H03H7/30;H03D1/04 |
主分类号 |
H03H7/30 |
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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