Detection and evaluation of I/Q impairments in RF digital transmitters

摘要: Troubleshooting of radio-frequency (RF) digital transmitters is considered. A new signal-processing method developed, which capable both detecting and evaluating the most recurrent impairments in I Q paths transmitter. Only acquisition either or intermediate-frequency (IF) RF output signal needed, thus avoiding any difficulty connected with inaccessibility baseband and/or IF section a fully assembled Moreover, has required features automation effectiveness, granted by use RLS-based algorithms proved results obtained many experiments on actual signals. Even though presented paper refer to wideband code-division multiple-access technology, shows itself suitable for troubleshooting transmitter implementing quadrature-amplitude modulation.