Patent ID: 9385890
Filing Date: 2016-07-05
CPC Classification: H04L

Claim Text:
1. A radio communication apparatus operable over a wide range of frequencies, the apparatus comprising: a signal processing device configured to receive an analog signal, to perform an analog to digital conversion at a predetermined sample rate independent of a selected frequency band within the wide range of frequencies to generate a digital signal, and to digitally process said digital signal to output a data signal at baseband associated with said selected frequency band; and a frequency band selector configured to provide information on the selected frequency band to the signal processing device, wherein the signal processing device includes an analog to digital converter configured to sample the received analog signal at said predetermined sample rate, and to output said digital signal; a quadrature demodulator configured to perform quadrature demodulation of the digital signal, and to output a complex signal including a complex data signal and an image of the complex data signal; a complex channel selection filter configured to receive the complex data signal, and to output a filtered complex signal including only one of the complex data signal or the image of the complex data signal; a digital down-sampler configured to receive the filtered complex signal and to generate a down-sampled complex signal that includes one sample out of each group of N sequential samples in the filtered complex signal, where N is an integer number larger than or equal to two and depends on the selected frequency band; and a baseband tuner configured to receive the down-sampled complex signal, and to output a complex baseband data signal.