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The Hard Disk Drive (HDD) industry has, in recent years, struggled with attempting to attain continual growth in storage capacity to meet the needs of a rapidly growing storage demand in the information age. Conventional Perpendicular Magnetic Recording (PMR) is already hitting its limit with areal density growth slowing down considerably in recent years. In moving towards higher densities, PMR faces the problem of simultaneously shrinking the size of bits and ensuring the media remains writable without compromising the thermal stability of its magnetic grains. To overcome this, various novel recording architectures have been proposed, namely Heat Assisted Magnetic Recording (HAMR), Bit Patterned Magnetic Recording (BPMR), Shingled Magnetic Recording (SMR) and Two-Dimensional Magnetic Recording (TDMR). HAMR overcomes the trilemma by injecting thermal energy into a high coercivity and thermally stable media (needed for high density) that would otherwise require an excessively strong head field to write. BPMR organizes magnetic grains into a defined lattice and stores bit on single grains known as islands. SMR targets for a higher track density by writing data tracks using a shingling technique. TDMR uses the same writing mechanism as in SMR. In TDMR however, information is read simultaneously from multiple tracks through the use multiple reader heads. To attain massive storage improvements in the near future, the industry needs to invent new ideas across the entire HDD platform. Development of new recording architectures, concurrent with the development of new trends in signal processing are essential in paving the way to new and intriguing prospects of significant performance gains. As such, the first part of the thesis focuses on a system level study of the recently proposed SMR and HAMR channel. The formulation and evaluation of theoretical models for these emerging recording technologies is essential in enabling an accurate prediction of its feasibility. Magnetic researchers often employ

Coding and signal processing for high density granular magnetic recording systems