调制和编码对超宽带接收机性能改善的比较

1 INTRODUCTION Ultra- wideband (UWB) technology can achieve 100Mbps high- speed wireless communications by use of GHz bandwidth short pulses. Because it has some merits such as very low radio power, difficult to be detected, good penetration and centimeter level location ability, it can be used in secret communications, target detection, personnel search and so on military applications. Since the large bandwidth of UWB signal cause the channel to be extreme frequency selectivity, a con…

Comparison of Performance Improved by Modulation and Coding for Ultra-wideband Receiver

Both averaged transmitted-reference (ATR) modulation technique and forward error correction (FEC) coding technique can improve the performance of Ultra-wideband (UWB) autocorrelation receiver by adding some redundant signals. In order to study which technique can provide much better improvement with the same amount of redundancy,a performance comparison between ATR modulation system and BCH coded DPSK system in a multipath channel was made in this paper. The two systems were analyzed in theory and simulated in the IEEE multipath channel model. The results show that ATR modulation technique has more superiority at low Eb/N0 (far distance) situation,but only raise the performance at small reference signal numbers; At high Eb/N0 (near distance) situation,FEC coding technique has better bit error rate and can reduce ISI more remarkable.