The Design And VLSI Implementation Of The Baseband Unit Of The IR-UWB Non-Coherent System

Ultra-Wide Band (UWB) communication technology is a pop technology of wireless communication area, which can transmit data at high speed with high bandwidth, low power spectrum density as well as narrow band pulse sequence.This paper firstly introduces the history, application and present research of wireless communication, then refers to theoretical basis of definition and modulation system of UWB. Finally, on the basis of analyzing several detecting-receiving methods of IR-UWB, this paper proposes an IR-UWB system based on incoherent detection. On this basis, we design the demo for IR-UWB wireless communication system, which is integrated and carried out on chip.The main contents of this paper are about the design of baseband unit in IR-UWB wireless communication incoherent OOK system and implementation of VLSI. The system we design adopts incoherent transmission, OOK modulation and incoherent receiving of peak value envelope detection with merit of simple structure, low power consumption and cost, which can be used to the high speed data transmission rate system in point-to–point short distance.This paper completes the implementation of baseband unit transceiver. The total area of the baseband chip (including the PADs) is about 1.7mm * 2.9mm, including 9K bytes SRAM, the baseband circuit, the DLL (delay locked loop) 12 phase clock circuit and the high-speed comparator module. Finally the baseband unit was tape-out using the SMIC 0.18um CMOS process flow. Then it was tested. The peak data transfer rate is about 40Mbps. The wireless communication distance is about 2 meters. The non-coherent system has achieved the video transmission, and it shows the good result.