The punchline is towards the end of this article: http://rfdesign.com/mag/radio_new_technology_facilitates
TechnoConcepts' RF to digital converter is the first 5 GHz carrier speed RF to digital converter capable of direct conversion of a 5 GHz RF carrier, eliminating all analog IF circuits. This receiver is based on a very high speed 5 GHz delta-sigma converter that digitizes signals by modulating the analog input (radio signal) into a high-speed 1-bit digital datastream. The datastream is then digitally processed on the same IC to produce a high-resolution multiple bit word stream sent at a slower data rate. This is the first device to completely eliminate the need for conventional radio receiver downconverters and the associated external analog components. This RF to digital converter is a closed-loop system in which the order of the loop and the input bandwidth may be changed to achieve the desired resolution. A narrow bandwidth results in higher resolution than a wide bandwidth. Parameter GaAs SiGe Maximum clock frequency > 5 GHz > 15 GHz SINAD (signal to noise+distortion) > 70 dB > 110 dB Eff. resolution bits at 2.5 GHz carrier: 14 bits 18 bits 10 MHz BW 11 bits 14 bits _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
