Half duplex radio transceiver with low IF receiver
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United States of America Patent
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-
Jun 20, 2006
Grant Date -
Sep 19, 2002
app pub date -
Mar 12, 2002
filing date -
Mar 17, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A half duplex radio transceiver comprises a transmitter (100) and a low IF receiver (200). The difference between the transmit frequency and the receive frequency is equal to the low IF. A common frequency generator (300) is shared between the transmitter and receiver without needing to be retuned. An upconversion signal at the transmit frequency is used for down conversion in the receiver. Transceivers at opposite ends of a communication link, such as in a master/slave network, have their transmit and receive frequencies interchanged. Optionally a transceiver may be configurable to either form e.g. as either a master of a slave station. Channel sensing for Carrier Sense Multiple Access (CSMA) may be performed on the transmit frequency without retuning the receiver.
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