Abstract
In WCDMA receivers, WCDMA modulated adjacent channel interferers (ACI) can distort the useful signal due to non linearity of the front end RF components. Non linearity of the RF front end transfers the modulation of the transmitter (TX) leakage onto the ACI, resulting in cross-modulation distortion. In addition to this, if the ACI signal is strong, it would undergo spectral re-growth and some fraction of its power will leak into the adjacent desired channel. The adjacent channel selectivity (ACS) scenarios in the 3GPP RX specification outline the performance requirement for the receiver in the presence of a strong as well as a weak ACI signal. For the ACS high power scenario (in which the ACI signal is strong), the distortion due to ACI leakage is much more significant compared to the cross-modulation distortion. Therefore, understanding the ACI leakage distortion becomes important, in order to ensure reliable receiver performance. In this paper, we analyze and report observations of the ACI leakage phenomenon on a WCDMA receiver chip. Measurement results have also been reported for the 3GPP ACS high power scenario. The chip measurements are supported with time-domain simulation results
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
