topic:
Optical digital signal processing (DSP) chips are the "heart" in the field of optical transmission. Such chips are often implemented based on application-specific integrated circuits (ASIC). For example, the capacity of an optical transmission chip manufactured with a 7nm chip process can reach 800Gbps, which is equivalent to a single optical fiber that can achieve a capacity of 48T bps, ensuring the explosive growth of network traffic. DSP algorithm design ASIC chip generally comprises two main steps, the first step is designed according to the physical model of channel impairments compensation algorithm, in which case only need to consider floating point calculations; second step is a two -chip resources and power constraints, the algorithm Transform into a fixed-point form that can be realized by an ASIC chip. At this time, the algorithm needs to be refined into the most basic operations such as multiplication and addition on the chip, and the influence of fixed-point quantization noise must be considered. How to weigh performance and resources to achieve the optimal design in specific scenarios is a persistent topic in the field of DSP chip algorithm engineering.
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