The application of the asymmetric polyphase filter in an SSB transceiver

Author

West, J.D.K.

Author_Institution

Grinaker Electron. Syst. Pty Ltd., Fish Hoek, South Africa

fYear

1991

fDate

8/30/1991 12:00:00 AM

Firstpage

85

Lastpage

92

Abstract

This paper describes the polyphase phase shift filter system of SSB generation and demodulation, and highlights the suitability of the polyphase filter for interfacing with CMOS analogue gates as a switching mixer. The performance is analyzed in the light of several years of production of a 1.6 to 30 MHz 100 W transceiver using this technique. Typically under conditions of power amplification the apparent carrier and sideband suppressions are reduced from the levels generated in the modulator. The reasons for this degradation in performance are presented

Keywords

demodulation; mixers (circuits); passive filters; phase shifters; transceivers; 1.6 to 30 MHz; CMOS analogue gates; HF; MF; SSB transceiver; apparent carrier suppression; apparent sideband suppression; asymmetric polyphase filter; degradation in performance; phase shift; power amplification; switching mixer; Amplitude modulation; Bandwidth; Baseband; Demodulation; Digital signal processing; Diodes; Filters; Frequency; Production systems; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Signal Processing, 1991. COMSIG 1991 Proceedings., South African Symposium on

Conference_Location

Pretoria

Print_ISBN

0-7803-0040-8

Type

conf

DOI

10.1109/COMSIG.1991.278229

Filename

278229