A reconfigurable software defined ultra-wideband impulse radio transceiver

[摘要] An ultra-wideband (UWB) software defined radio (SDR) implementation ispresented. The developed impulse radio (IR) transceiver employs first orderbandpass (BP) sampling at a conversion frequency which is four times thechannel bandwidth. The subsampling architecture directly provides the RFsignal avoiding any non-ideal mixer stages and reduces the requirements ofdigital signal processing implemented in a field programmable gate array(FPGA). The transmitter consists basically of a multi-Nyquist digital toanalog converter (DAC), whereas the implemented matched filter (MF) receiverprototype employs a standard digitizing oscilloscope. This design can beadaptively reconfigured in terms of modulation, data rate, and channelequalization. The reconfigurable design is used for an extensive performanceanalysis of the quadrature phase shift keying (QPSK) modulation schemeinvestigating the influence of different antennas, amplifiers, narrowbandinterferers as well as different equalizer lengths. Even for distances up to7 m in a multipath environment robust communication was achieved.

[学科分类] 电子、光学、磁材料