Adriaan J. de Lind van Wijngaarden

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—New methods are presented to protect maximum runlength-limited sequences against random and burst errors and to avoid error propagation. The methods employ parallel conversion techniques and enumerative coding algorithms that transform binary user information into constrained codewords. The new schemes have a low complexity and are very efficient. The(More)
—Rapid acquisition of accurate crosstalk estimates is a core requirement for effective precoding in digital subscriber line (DSL) systems. It is shown that signal-to-noise ratio (SNR) reports provided by customer premises equipment (CPE) can be used to perform this task by " tuning " the precoder, i.e., iterating alternate steps of estimation and precoder(More)
—We present advanced combinatorial techniques for constructing maximum runlength-limited (RLL) block codes and maximum transition run (MTR) codes. These codes find widespread application in recording systems. The proposed techniques are used to construct a high-rate multipurpose modulation code for recording systems. RLL constraints is a high-rate(More)
RadioStar is a novel system developed by Bell Labs to provide low cost, cellular wireless coverage primarily targeted for enterprises, public spaces, and residences. The underlying concept is to digitize the output radio signals of a base station and to transport these signals over a Gigabit Ethernet network to multiple low-cost radio frequency radiation(More)
—Several algorithms for the construction of maximum run-length limited codes are presented that are based on the sequence replacement technique. This technique effectively converts an input sequence into a constrained sequence in which a prescribed subsequence is forbidden to occur. The proposed algorithms show how all forbidden subsequences can be(More)