LITERATURE SURVEY 1. A Single-Chip 2.4GHz Low-Power CMOS Receiver and Transmitter for WPAN

Applications In this paper A single chip 2.4GHz low power CMOS receiver and transmitter for WPAN applications are implemented and measured. The receiver uses a low-IF architecture with a polyphone filter and transistor linearization technique to improve linearity per power, and the transmitter adopts a ROM based direct-conversion architecture for low power consumption and high integrated density. Experimental results show –79dBm of sensitivity, 13dB of receiver NF,-4.5dBm of receiver IIP3, and-4dBm of transmitter output power. The power consumption is 9mW in receiver and 17mW in transmitter at 1.8V, respectively. In this Paper An experimental 2.4-GHz CMOS radio composed of RF and digital circuits for the low-power and low-rate preliminary IEEE802.15.4 WPAN is reported, consuming 21 mW in receive mode and 30mWin transmit mode. The RF design focus is to maximize linearity for a given power consumption using linearization methods which lead an order of magnitude improvement in LNA/mixer IIP3/power performance. Chip-on-PCB technology allows implementation of a coin-sized radio at very low cost, which also provides 3 dB gain patch antenna and high (50) inductors. Index Terms—2.4-GHz single-chip radio, chip on PCB, digital baseband, low-power RF CMOS transceiver, low-rate WPAN. This paper introduces a new IEEE standard, IEEE 802.15.5, which provides mesh capability for wireless personal area network (WPAN) devices. The standard provides an architectural Frame work enabling WPAN devices to promote interoperable, stable, and scalable wireless mesh topologies. It is composed of two parts: low-rate WPAN mesh and high-rate WPAN mesh. In this paper, we present only low-rate WPAN mesh because it is designed to support wireless sensor networks. IEEE 802.15.5 low-rate part is a lightweight scalable mesh routing protocol