Digital VLSI OFDM transceiver architecture for wireless SoC design

This paper presents the VLSI architecture of an OFDM baseband transceiver for wireless communications. The open/closed-loop carrier recovery achieves the stepping frequency acquisition for high-band RF systems, and the proposed timing recovery cooperating with the self-correcting interpolation realizes an OFDM baseband digital IP design. Hardware sharing and power-of-2 coefficients fulfill this compact transceiver system chip. Simulations show that the receiver can deliver 10% packet error rate (PER) requirement under all specified SNR for IEEE 802.11a. Using the typical 0.25 micrometre CMOS technology, the chip occupies 3.5×3.5 mm² area and consumes 109 mW under 2.5 V power supply.