Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
Reexamination Certificate
2007-09-25
2007-09-25
Vuong, Quochien B. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Measuring or testing of receiver
C455S063100, C455S067130, C455S232100
Reexamination Certificate
active
10883246
ABSTRACT:
One illustrative method of reducing signal interference in a wireless receiver includes receiving a radio frequency (RF) signal; amplifying the received RF signal with a gain G; producing a baseband signal from the amplified RF signal; producing a signal-to-interference (S/I) ratio from the baseband signal; and adjusting the gain G based on the S/I ratio. Preferably, the gain G is varied over a time period to produce a plurality of S/I ratios, so that the gain G corresponding a maximum S/I ratio produced over the time period can be selected for optimal performance. With this technique, higher accuracy is provided as intermodulation distortion is accounted for in the S/I ratio. Advantageously, the S/I ratio calculations and the gain adjustments are performed digitally by one or more processors such as a digital signal processor (DSP).
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European Search Report for Application # 04253937.9-1525-, Dec. 16, 2004.
Oskorep, Esq. John J.
Research In Motion Limited
Vuong Quochien B.
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