Title :
Effects of amplitude, phase, and frequency imperfections on the performance of a direct conversion receiver (DCR) for personal communication systems
Author :
Voudouris, K. ; Noras, J.M.
Author_Institution :
Electron. Eng. Lab., Kent Univ., Canterbury, UK
Abstract :
Results from a practical study of a direct conversion receiver (DCR) and its subsections, namely, power splitter, branch coupler hybrid, coupled lines bandpass filter, lowpass filter, balanced mixer, and oscillator, are presented. The receiver is designed for the 2-GHz frequency band, with particular reference to personal communications terminals for the digital European cordless telecommunications (DECT) standard. The DCR overall performance, based on measured figures of individual subcircuits, is analyzed with the aid of the Eesof-Omnisys simulator. Typical value for the signal-to-noise ratio is 12 dBm for 10/sup -3/ bit-error rate. The receiver can tolerate amplitude and phase mismatches of 3% and 5 degrees , respectively, as well as 1.2-kHz local oscillator drift. The dynamic range is 80 dB. The performance of the DCR fits well with the DECT specification.<>
Keywords :
cordless telephone systems; demodulation; digital radio systems; error statistics; mobile radio systems; personal communication networks; radio receivers; radiofrequency interference; radiotelephony; 2 GHz; BER; DECT specification; Eesof-Omnisys simulator; RFI; SNR; UHF; amplitude imperfections; balanced mixer; bit-error rate; branch coupler hybrid; coupled lines bandpass filter; digital European cordless telecommunications; direct conversion receiver; frequency imperfections; lowpass filter; oscillator; personal communication systems; phase imperfections; phase mismatches; power splitter; Analytical models; Band pass filters; Bit error rate; Communication standards; Frequency; Mixers; Oscillators; Performance analysis; Signal to noise ratio; Telecommunication standards;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
