Reception of radio frequency signals using frequency offset downconversion subsampling discrete time.

摘要

A RF communications receiver allows greater chip integration STANDARD SILICON AND CONSUME LESS THAN THE PREVIOUS RECIPIENTS ENERGIA. THE SIGNAL PROCESSING TECHNIQUES FOR SUB-SAMPLING AND DISCREET TIME-used to convert low frequency, filter, amplify, and select a channel from RF ANALOG DESIRED. MUESTREOY circuit-RETENTION (81) SUB-SAMPLES THE DESIRED CHANNEL ANALOG RF carrier frequency FC, THEREFORE turning-A-LOW an image signal discrete-time FREQUENCY FI. SUCCESSIVE SAMPLINGS-A-BAJA (99. 1) FILTERING ANTI-ALIAS (95. 1) and amplification of the image signal discrete-time produce a signal discrete-time CONTAINING LOW FREQUENCY CHANNEL CONVERT-A FK FREQUENCY ORA card. SIGNAL TIME-DISCRETE LOW-FREQUENCY THEN digitizes, (87) is filtered (91) and demodulates (93) TO DISCLOSE INFORMATION CONTENT OF BANDA BASE.