Title :
DC offset elimination analysis in zero-IF receiver
Author_Institution :
Global Technol. Dev. Group, Motorola Software Center, Penang, Malaysia
Abstract :
The most serious problem faced in zero-intermediate frequency (IF) receiver is DC-offset. DC-offset is caused by leakage of the local oscillator (LO) into the down converter input. The receiver performance is significantly degraded due to DC-offset. This paper illustrate, analyze, simulate and compare two digital signal processing (DSP) algorithms which remove this residual DC-offset. In the analysis, the settling time, maximum fluctuation and variance of the two DC estimators were derived.
Keywords :
frequency convertors; radio receivers; radiofrequency oscillators; signal processing; DC estimator maximum fluctuation; DC estimator settling time; DC estimator variance; DC offset elimination analysis; DSP algorithm; LO; digital signal processing algorithm; down converter input; local oscillator; zero-IF receiver performance; zero-intermediate frequency receiver; Algorithm design and analysis; Analysis of variance; Analytical models; Degradation; Digital signal processing; Fluctuations; Frequency; Local oscillators; Signal analysis; Signal processing algorithms;
Conference_Titel :
Communications, 2003. APCC 2003. The 9th Asia-Pacific Conference on
Print_ISBN :
0-7803-8114-9
DOI :
10.1109/APCC.2003.1274443
