Symbol detection apparatus and method for two-dimensional channel data stream with cross-talk cancellation

摘要

The present invention relates to a symbol detection apparatus for detecting the symbol values of a two-dimensional channel data stream recorded on a record carrier, said channel data stream comprising a set of contiguous symbol strips (B) of symbol rows (r) onedimensionally evolving along a first direction and being aligned with each other along a second direction, said two directions constituting a two-dimensional lattice of symbol positions. In order to avoid a substantial loss in detection performance at the edges of a 2D symbol strip in a 2D format, a symbol detector apparatus is proposed comprising: a cross-talk cancellation unit (XTC) for cancellation of radial inter-symbol interference, also known as cross-talk or inter-track interference, present in the first adjacent symbol rows (g₀₁, g₀₂; r_r1'r_N+2)of a symbol strip (B1) from the next but one adjacent symbol row (rb₀₁, rb₀₂; r0, r_N+3) of said symbol strip (B1) by applying for each first adjacent symbol row (g₀₁, g₀₂; r₁, r_N+2) a cross-talk cancellation between a first adjacent symbol row (g₀₁, g₀₂; r₁, r_N+2) and its neighboring symbol row (rb₀₁, rb₀₂; r₀, r_N+3) not belonging to said symbol strip (B1), and a 2 D symbol detector (V) for symbol detection of the symbols of said symbol strip (B1) together with said first adjacent symbol rows (g₀₁, g₀₂; r₁, r_N+2)