Performance of double binary turbo coded UWB systems with antenna diversity

摘要

In this paper, the performance of double binary turbo coded ultra wide band (UWB) system with antenna diversity is analyzed and simulated in an indoor wireless channel. We consider pulse position modulation-time hopping (PPM-TH) UWB system. In double binary turbo code, there are two inputs, A and B. The encoder is fed by blocks of k bits or N couples (N = k bits / 2). The most significant bit (MSB) of the first byte after the burst preamble is assigned to A, the next bit to B and so on for the remainder of the burst content. A modified Saleh and Valenzuela (SV) model is adopted as a UWB indoor channel model. Perfect synchronization between a transmitter and a receiver is assumed. Therefore, coherent equal gain combining (EGC) scheme to collect the energy available in the multipath components is investigated. It is shown that the performance is improved by increasing the number of antennas at the receiver. The results of this paper can be applied to the applications of UWB.