2 research outputs found
Wideband Interleaved Vector Modulators for 5G Wireless Communications
Next generation wireless communication systems such
as fifth generation mobile communications and high throughput
satellites have promised a step increase in the rate at which digital
data can be transmitted. This requires wideband modulators
consisting of high speed digital to analogue converters and RF upconverters to generate the wideband signal of interest. In this paper
we demonstrate a scheme to generate a wide bandwidth modulated
signal by bandwidth interleaving multiple modulators of narrower
bandwidths. The proposed scheme is experimentally validated with
measured results on an 8PSK signals of symbol rate 80 MSPS with
modulation characteristics in accordance with DVB-S2 standard
Digital signal splitting among multiple DACs for analog bandwidth interleaving (ABI)
A novel concept called analog bandwidth interleaving (ABI) has been recently introduced in order to overcome bandwidth limitations of digital-to-analog converters (DACs) by interleaving the output signals of multiple DACs in the frequency domain. We present for the first time the fundamental interdependencies between bandwidth, sample rate, the number of samples, and the local oscillator frequencies for ABI-DACs. Furthermore, a mathematical expression for the splitting of the digital signal among multiple DACs is presented. Simulations for an exemplary ABI-DAC highlight the interdependencies between the system parameters and difficulties concerning integer solutions