Comparison of modulation schemes and rake receiver structures for UWB systems on an IEEE 802.15.3 indoor channel

The all-Rake and selective-Rake receiver structures are examined for different transmission scenarios, including multiple access interference and intersymbol interference environments. The results show that the all-Rake receiver does not necessarily offer the best performance when operating in intersymbol interference environments. Some candidate modulation schemes proposed for ultra-wideband communications are assessed and compared using a measurements-based fading model. Although some analytical and semi-analytical methods using the Gaussian approximation predict the same bit error rate estimates for several modulation schemes, our results show that the actual performances of these modulation schemes are different