Most studies on optical coding theory are based on the assumptions that there is only one type of service in a coding-based optical system and the bit rates among services are the same [1–9]. Services, such as data, voice, image, and video, with different bit rates, traffic patterns, and quality-of-service (QoS) requirements are expected to coexist in future systems. The use of single-length, constant-weight optical codes alone will not be able to serve these multirate, variable-QoS, multimedia systems sufficiently or efficiently.
One possible solution is to utilize multiple wavelengths on top of 1-D optical codewords of various lengths in the so-called hybrid WDM-coding scheme [7, 10]. While each wavelength carries ...
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