Performance Comparison of TH-BPPM/TH-BPSK using Rake Receivers in IEEE 802.15.4a Channel Model

We study the channel model for IEEE 802.15.4a which is different from general channel model or the IEEE 802.15.3a channel model. Under the IEEE 802.15.4a channel environments, performance of TH-BPPM and TH-BPSK systems using S-Rake and P-Rake is evaluated. In the 802.15.4a system, complexity and cost are two important issues which need to be taken into consideration. The complexity of detection can be reduced with S-Rake and P-Rake. Especially, P-Rake can reduce complexity greatly because no channel estimation is needed. Simulation results show that the TH-BPSK system achieves better performance than the TH-BPPM system