Session
Technical Session XIII: Poster Session
Abstract
The design details of a direct block-down converting receiver which provides simultaneous demodulation of up to seven uplink channels is presented. The overall architecture is that of a block down converting receiver utilizing a fixed tuned RF front end and a single conversion. The bandwidth of interest is complex down-converted to baseband into I and Q channels, and sampled by a high speed analog-to-digital converter. The digitized I and Q data is then input to a Fast Fourier Transform (FFT) processor to perform coarse channelization. Finally, filtering, channelization, and demodulation is performed within a digital signal processor (DSP) dedicated to each channel. The design approaches that of an all digital radio implemented with off-the-shelf components selected for their suitability for use in the space environment.
A Multi-Channel Direct Conversion Digital Uplink Receiver
The design details of a direct block-down converting receiver which provides simultaneous demodulation of up to seven uplink channels is presented. The overall architecture is that of a block down converting receiver utilizing a fixed tuned RF front end and a single conversion. The bandwidth of interest is complex down-converted to baseband into I and Q channels, and sampled by a high speed analog-to-digital converter. The digitized I and Q data is then input to a Fast Fourier Transform (FFT) processor to perform coarse channelization. Finally, filtering, channelization, and demodulation is performed within a digital signal processor (DSP) dedicated to each channel. The design approaches that of an all digital radio implemented with off-the-shelf components selected for their suitability for use in the space environment.
