Reed Solomon (RS) codes are widely used in a variety of communication systems. Continual demand for ever higher data rates makes it necessary to devise very high-speed implementations of RS decoders. In this chapter, a uniform comparison is drawn for various algorithms and architectures proposed in the literature, which help in selecting the appropriate architecture for the intended application. Dual-line architecture of modified Berlekamp Massey algorithm is chosen for Ultra Wide Band (UWB). Using 0.12 ìm technology the area of the design is 0.22 mm² and throughput is 1.6 Gbps. The design dissipates only 14 mW of power in the worst case, including memory, when operating at 1.0 Gbps data rate.