ADAPTIVE CONTINUOUS-TIME EQUALIZATION AND FDTS DF SEQUENCE DETECTION/

An adaptive analog continuous-time forward equalizer and a Fixed Delay Tree Search with Decision Feedback (FDTS/DF) detector can be used to implement high speed low power sequence detection for a magnetic recor ding system. An analog continuous-time forward equalizer offers a low power, high speed solution to the equalization problem, although it ca nnot achieve the degree of pulse shape control provided by a long FIR filter. However, an FDTS/DF detector can be easily adapted to cope wit h the resulting imprecisely equalized pulses. Earlier work demonstrate d the suitability of a Complex Graphic Equalizer (CGE) for the adaptiv e continuous time forward equalizer[1]. System simulations indicated t he viability of a CGE-FDTS/DF detector in a 2/3(1,7) coded channel. Ne w results explore the performance of a CGE-FDTS/DF system for an 8/9(0 ,3) coded channel. Additionally, the feasibility of a CGE-EPR4 detecti on system is demonstrated.