Performance of a direct conversion receiver with pi /4-DQPSK modulated signal
- 9 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Analog implementation of direct conversion receivers suffers from a variety of detriments such as DC offset, which can be caused by the self-mixing of on and off channel signals, carrier feedthrough from high local oscillator signals, and phase and gain imbalance in the in-phase and quadrature-phase branches. The performance of a direct conversion receiver is investigated. The performance degradation due to various impairments is discussed, and simulated and measured results are compared. Imperfections in the receiver front end as well as degradations due to spurious signals are studied. Signal-to-noise penalty curves for four specific imperfections are presented and possible solutions are recommended to minimize their effects. The results presented are based on a raised cosine Nyquist channel with a roll-off of 0.35 Author(s) Anvari, K. Kaube, M. ; Hriskevich, B.Keywords
This publication has 3 references indexed in Scilit:
- Noncoherent detection of pi /4-QPSK systems in a CCI-AWGN combined interference environmentPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- The design of a mobile radio receiver using a direct conversion architecturePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- An integrated circuit v.h.f. radio receiverRadio and Electronic Engineer, 1980