Ultra-Wide Band (UWB) technology, which offers a solution for high bandwidth, high data rate, low cost, low power consumption, position location capability.The Rake receiver used for spread spectrum is considered a very promising candidate for UWB reception, due to its capability of collecting multipath components. Ultra Wide Band signals occupy such a large bandwidth; they operate as an overlay system with other existing narrowband (NB) radio systems overlapping with their bands. In order to ensure a robust communication link, the issue of coexistence and interference of UWB systems with current indoor wireless systems must be considered. Bit error rate (BER) performance study for UWB channel models are analyzed using proposed receiver models. Suppression of Narrowband interference in WLAN has been studied intensively to remove Inter Symbol Interference (ISI).For all simulated channels, TR receiver shows a performance degradation of 3 to 4 dB compared to ATR and DTR receiver due to the usage of noisy unmodulated reference template.