T.T. Nguyen, K. Cai, and K.A. Schouhamer Immink,
'Efficient Design of Subblock Energy-Constrained Codes and Sliding Window-Constrained Codes', Submitted to IEEE Trans. on Inform. Theory, July 2020.
Abstract - The subblock energy-constrained codes (SECCs) and sliding window-constrained codes (SWCCs) have recently attracted attention due to various applications in communication systems
such as simultaneous energy and information transfer. In a SECC, each codeword is divided into smaller non-overlapping windows, called subblocks, and every subblock is constrained to carry
sufficient energy. In an SWCC, however, the energy constraint is enforced over every window. In this work, we focus on the binary channel, where sufficient energy is achieved theoretically
by using relatively high weight codes, and study SECCs and SWCCs under more general constraints, namely bounded SECCs and bounded SWCCs. We propose two methods to construct such codes with
low redundancy and linear-time complexity, based on Knuth’s balancing technique and sequence replacement technique. These methods can be further extended to construct SECCs and SWCCs.
For certain codes parameters, our methods incur only one redundant bit. We also impose the minimum distance constraint for error correction capability of the designed codes, which helps to reduce the
error propagation during decoding as well.
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