Patent ID: 7295861
Filing Date: 2007-11-13
Classification: H04B

Abstract:
1. An apparatus for processing signals of at least two different communication standards, including a narrow band signal having a narrow bandwidth and a wide band signal having a wide bandwidth, comprising: a shared radio frequency (RF) front-end, said shared RF front-end receiving said wide band signal during at least one period of operation and downconverting, in a single downconversion, said wide band signal directly to baseband, said shared RF front-end receiving said narrow band signal during at least another period of operation and downconverting, in a single downconversion, said narrow band signal to a low intermediate frequency (Low-IF) no more than a few times the bandwidth of the narrow band signal; a baseband processing chain coupled to said shared RF front-end and operating on said downconverted wide band signal to extract desired data from said downconverted wide band signal; and a Low-IF processing chain, separate from the baseband processing chain, coupled to said shared RF front-end in parallel to said baseband processing chain and operating on said downconverted narrow band signal to extract desired data from said downconverted narrow band signal, wherein said shared RF front-end is switchable to connect either to said baseband processing chain or to said Low-IF processing chain.