| 摘要 |
The present invention provides for an improved transceiver architecture using fewer frequency synthesizers. The number of frequency synthesizers is reduced by utilizing an existing frequency source having a frequency slightly offset from the ideal sampling frequency. In one embodiment, an improved transceiver capable of communicating CDMA encoded signals is presented. The transceiver includes a first frequency synthesizer (260) producing a first mixing tone (261), a second frequency synthesizer (270) producing a second mixing tone (271), a first sampling source (290) producing a first sampling signal, and a receiving channel. The receiving channel includes a first mixer (232), a second mixer (235), and an analog to digital converter (ADC). The first mixer (232) receives the incoming CDMA signal and the first mixing tone, producing a first IF signal. The second mixer (235) receives the first IF signal and second mixing tone, producing a second IF signal in response. The ADC receives the second IF signal and the first samplingsignal, producing a digital data stream in response, whereby the frequency of the first sampling signal is offset from the frequency of the second IF signal, the digital data having a small amount of error associated therewith in proportion to the small amount of the frequency offset.
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