Title :
A digital image-rejection sub-system for low-IF receivers
Author :
Hua-Jie, Lin ; Hao-shan, Shi
Author_Institution :
Dept. of Electron. Eng., Northwestern Polytech. Univ., Xi´´an, China
Abstract :
This paper investigates in-phase/quadrature phase (I/Q) imbalances between the input paths of low intermediate frequency (IF) receiver. The imbalances exist along signal paths in subsystems such as the mixer and result in the image interference aliasing into the desired signal band, thus increasing the image-reject ratio (IRR) and degrading the performance of the receiver. This paper presents a new topology with digital complex sampling technique for the I/Q mismatch cancellation and gives the simulation result in MATLAB.
Keywords :
radio receivers; signal sampling; telecommunication channels; I-O mismatch cancellation; IRR; MATLAB simulation; channel mismatch; digital complex sampling technique; digital image-rejection subsystem; image aliasing; image interference; image-reject rate; image-rejection topology; in-phase-quadrature phase; intermediate frequency; low-IF receiver; signal path; Baseband; Bit error rate; Circuits; Digital images; Frequency; Image sampling; Interference; Receivers; Signal generators; Topology;
Conference_Titel :
Communication Technology Proceedings, 2003. ICCT 2003. International Conference on
Print_ISBN :
7-5635-0686-1
DOI :
10.1109/ICCT.2003.1209646
