Programmable Preamble Cycles for Signal Integrity
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Solution Overview
Problem
Intersymbol interference (ISI) and signal distortion due to insufficient channel bandwidth and improper filtering compromise the integrity of communicated data in digital communication systems, particularly in computing systems with idle or DC states.
Innovation Solution
Programming programmable registers in communication devices to include a predetermined number of preamble cycles before signal transmission, which conditions the communication path and reduces data errors by improving signal sampling precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If signal transmission is performed without preamble cycles, then communication speed is improved, but data integrity deteriorates due to intersymbol interference and signal distortion
Solution Approach 1:
The patent applies preliminary action by transmitting preamble cycles before the actual data signal. These preamble cycles condition the communication path in advance, allowing the receiver to adjust to the incoming signal characteristics and establish proper sampling timing, thereby preventing intersymbol interference and signal distortion before they affect data transmission
2Reliability
If the number of preamble cycles is increased, then data integrity is improved by reducing intersymbol interference, but communication efficiency deteriorates due to increased transmission time
Solution Approach 1:
The patent applies parameter changes by making the number of preamble cycles programmable and adjustable. The system can dynamically change the preamble cycle count based on communication conditions, channel characteristics, and data requirements, allowing optimization between data integrity and communication efficiency for different scenarios
3Device complexity
If fixed preamble cycles are used, then system complexity is reduced, but adaptability deteriorates when communication path characteristics change
Solution Approach 1:
The patent applies dynamics by transitioning from fixed to programmable preamble cycle configuration. The system can dynamically adjust the number of preamble cycles based on detected communication path characteristics, channel conditions, and specific transmission requirements, enabling adaptation without requiring complete system redesign for different scenarios
Data Source
AI summary
A system includes a first communication device and a second communication device. The first communication device includes a programmable region. The programmable region of the first communication device is programmed so that an associated signal includes a number of preamble cycles. The second communication device also can include a programmable region. The programmable region of the second communication device can be programmed so that an associated signal includes a number of preamble cycles. The number of preamble cycles can be based on a variety of factors, such as the topology or implementation of the system. In an embodiment, the number of preamble cycles is associated with a data strobe signal, and data is not read or written in response to the data strobe signal until all of the preamble cycles have been transmitted and received.