**4. RF transceiver for IR-UWB**

The transmitter for IR-UWB integrates amplitude and spectrum tunability, thereby providing adaptable spectral characteristics for different data rate transmission. The receiver employs noncoherent architecture because of its low complexity and low power. A 3-5 GHz fully integrated IR-UWB transceiver is presented as shown in Fig. 1 (Xia et al., 2011). IR-UWB transceiver is implemented in a 0.13 µm 1P8M CMOS technology. The transceiver die microphotograph is shown in Fig. 2. The die area is 2 mm×2 mm. The chip is bonded to the 4-layer FR-4 PCB with chip-on-board (COB) assembly. With a supply voltage of 1.2 V, the power consumption of the transmitter is only 1.2 mW and 2.2 mW when transmitting 50 Mb/s and 100 Mb/s baseband signals, respectively; the power consumption of the receiver is 13.2 mW.

**Figure 1.** The proposed IR-UWB transceiver system architecture with OOK modulation

**Figure 2.** Microphotograph of IR-UWB transceiver

become –76.5 dBm at 220 Mb/s.

13.2 mW.

**4. RF transceiver for IR-UWB** 

bandwidth B need to increase from 20 to 178 MHz. MB-OFDM derives the receiver sensitivity requirements ranging from -80.8 dBm (for 54 Mb/s) to -73 dBm ( for 480 Mb/s) at different data rates. If the required SNR is 2.4 dB, the receiver noise figure is 11.7 dB and the channel bandwidth is 1.32 GHz, the receiver sensitivity with a DS-UWB receiver will

The transmitter for IR-UWB integrates amplitude and spectrum tunability, thereby providing adaptable spectral characteristics for different data rate transmission. The receiver employs noncoherent architecture because of its low complexity and low power. A 3-5 GHz fully integrated IR-UWB transceiver is presented as shown in Fig. 1 (Xia et al., 2011). IR-UWB transceiver is implemented in a 0.13 µm 1P8M CMOS technology. The transceiver die microphotograph is shown in Fig. 2. The die area is 2 mm×2 mm. The chip is bonded to the 4-layer FR-4 PCB with chip-on-board (COB) assembly. With a supply voltage of 1.2 V, the power consumption of the transmitter is only 1.2 mW and 2.2 mW when transmitting 50 Mb/s and 100 Mb/s baseband signals, respectively; the power consumption of the receiver is

**Figure 1.** The proposed IR-UWB transceiver system architecture with OOK modulation

In fact, most companies are diving head-on into DS-CDMA and MB-OFDM to form the foundation for most of the coming UWB products though the impulse approach is the hot research area in academia.
