Optical Receiver Integrating Fixed Hardware and Processor
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Solution Overview
Problem
Current optical receivers, particularly those using ASICs and FPGAs, face inflexibility and high costs due to long development cycles and limited capacity, making it difficult to adapt to changing algorithm requirements and high-speed data throughput needs in coherent optical transmission systems.
Innovation Solution
An optical receiver design that integrates a fixed hardware circuit with a processor in a single chip, allowing adaptive updates of processing parameters to support various algorithms and applications, thereby achieving flexibility and performance comparable to ASIC implementations without the need for new hardware designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If ASIC is used for high-speed optical transmission, then processing speed meets requirements, but development cycle is long and inflexible to algorithm updates
Solution Approach 1:
The system is divided into two segments: a fixed hardware circuit (ASIC) for high-speed signal processing and a separate processor for algorithm management. The fixed hardware circuit handles time-critical DSP operations at line rate, while the processor manages algorithm updates and parameter adjustments, allowing independent optimization of both speed and adaptability
Solution Approach 2:
A processor acts as an intermediary between the fixed hardware circuit and the external control system. This processor receives algorithm updates and configures the fixed hardware circuit accordingly, enabling flexible algorithm changes without requiring hardware redesign while maintaining the high-speed processing capabilities of the ASIC
2Adaptability or versatility
If FPGA is used for programmability, then adaptability to different algorithms is improved, but data throughput capacity is limited for 100G coherent receiver applications
Solution Approach 1:
The system replaces the purely software-based programmable logic of FPGAs with a hybrid architecture where critical path operations are implemented in fixed hardware circuitry. This substitution of mechanical/software logic with dedicated hardware paths enables the system to achieve ASIC-level throughput while retaining processor-based configurability for algorithm adaptability
3Productivity
If ASIC is used for fixed hardware circuit, then processing performance is high, but any algorithm modification requires complete redesign and retapping
Solution Approach 1:
The system introduces dynamic reconfigurability to the fixed hardware circuit through a processor that can modify operational parameters and algorithms without physical redesign. The fixed hardware circuit maintains its high-performance structure while the processor enables dynamic adaptation to different algorithms and applications, eliminating the need for costly redesign cycles
Data Source
AI summary
Optical receiver The invention relates to an optical receiver (100) for processing an optical receive signal (122a, 122b, 122c, 122d), the optical receiver (100) comprising a fixed hardware circuit (135) implementing a signal processing part for processing the optical receive signal (122a, 122b, 22c, 122d) using a processing parameter (152); a processor (151) being configured to adaptively update the processing parameter (152); and a package (131) to integrate the signal processing part and the processor (151) into one chip.10 Fig.