Abstract :
For transmitted-reference impulse radio, it has been experimentally shown that multiple transmit antennas can provide an energy boost in the received signal. Here, we propose a 2-transmit and Q-receive differential space-time block coded impulse radio with autocorrelation receiver. A mathematical model for predicting the system bit-error-rate (BER) performance is derived for intersymbol interference-free transmission over an ultra-wideband channel, and validated with computer simulated results. From the results, it is observed that in migrating from 1-transmit to 2-transmit antennas, a signal-to-noise ratio gain of 3 dB, 2 dB and 1 dB at BER = 10-5 can be achieved, respectively, for the case of 1-, 2- and 4-receive antennas.
Keywords :
block codes; error statistics; radio receivers; space-time codes; ultra wideband communication; 2-transmit antennas; BER performance; DSTBC impulse radios; ISI-free UWB channels; Q-receive antennas; autocorrelation receiver; bit-error-rate performance; differential space-time block coded impulse radio; intersymbol interference-free transmission; mathematical model; multiple transmit antennas; signal-to-noise ratio; transmitted-reference impulse radio; ultra-wideband channel; Autocorrelation; Bit error rate; Computational modeling; Intersymbol interference; Mathematical model; Predictive models; Receivers; Receiving antennas; Transmitting antennas; Ultra wideband technology;