发明名称 |
Digitally programmable radio modules for transponder systems |
摘要 |
A programmable digital radio is configured to perform transponder functions. A receiver in the programmable digital radio receives analog signals from an interrogator and digitizes the analog signals to produce digital interrogation signals. The digital interrogation signals are processed digitally and valid interrogations are detected. Processing includes detection of pulses, determination of each pulse's threshold, determination of intervals between pulses and whether the intervals meet mode criteria, and determination of priority of output of digital messages encoded in the pulses. At least one message is supplied to a transmit module in the programmable radio. The transmit module performs diversity processing on the received message to determine to which received signal to reply, produces reply data and modulates the reply data to produce intermediate frequency signals. The intermediate frequency signals are then converted to analog signals which are transmitted to the interrogator. |
申请公布号 |
AU6913696(A) |
申请公布日期 |
1997.03.19 |
申请号 |
AU19960069136 |
申请日期 |
1996.08.30 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
WILLIAM C. PHILLIPS;MICHAEL V. PASCALE;RONALD W MINARIK;KENNETH M SCHMIDT |
分类号 |
G01S13/74;H03D7/16;H04B1/04;H04B1/26;H04B1/40 |
主分类号 |
G01S13/74 |
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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