Wireless Transceiver Timing System
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Solution Overview
Problem
Conventional wireless communication systems face challenges in efficiently and economically supporting multiple communication standards with a single clock source, as the system clock frequency required to support multiple interfaces is often too high for use as a reference clock for the digital baseband processing system.
Innovation Solution
A timing system that includes a primary clock generation system providing a low frequency clock for the digital baseband processing system and additional clock generation systems for each wireless transceiver, generating higher frequency clocks synchronous with the air interface to produce high precision timing signals, allowing for efficient operation across multiple communication standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single high frequency system clock is used to support multiple communication standards, then the system can operate multiple interfaces in parallel, but the clock frequency becomes too high for use as a reference clock for the digital baseband processing system
Solution Approach 1:
The timing system is divided into two separate clock generation subsystems: a first clock generation system that provides a low frequency reference clock for the digital baseband processing system, and a second clock generation system that provides a high frequency system clock for supporting multiple wireless transceiver interfaces in parallel. This segmentation allows each subsystem to operate at its optimal frequency without compromise.
Solution Approach 2:
A timing signal generation system acts as an intermediary between the two clock systems. It receives the low frequency reference clock and generates timing signals that are synchronized with the high frequency system clock, thereby coordinating the operations of multiple wireless interfaces while maintaining proper timing relationships.
2Adaptability or versatility
If multiple separate clocks are used for each wireless transceiver, then each interface can operate independently, but the manufacturing cost and circuit board real estate increase
Solution Approach 1:
The high frequency system clock serves as a universal clock source that provides timing signals to multiple wireless transceiver interfaces simultaneously. This multi-functional approach allows all interfaces to operate independently with synchronized timing, eliminating the need for separate dedicated clocks for each interface and reducing both component count and manufacturing complexity.
3Speed
If a high frequency system clock is used to support multiple interfaces, then parallel operation is enabled, but the frequency is too high for digital baseband processing reference clock
Solution Approach 1:
The timing system separates the high speed function (supporting multiple interfaces in parallel) from the precision timing function (reference clock for digital baseband processing) by using two different clock frequencies. The low frequency reference clock provides stable, precise timing for baseband processing, while the high frequency system clock enables parallel interface operations.
Data Source
AI summary
A timing system is disclosed for use in a wireless communication system that includes wireless transceiver and a digital baseband processing system. The timing system includes a primary clock generation system that provides a low frequency clock that is used as the reference clock for a digital signal processing system, which generates low frequency timing signals, and a secondary clock generation system that provides a high frequency clock that is used by the wireless transceiver to produce high resolution timing signals to control the timing of the wireless transceiver. The high resolution timing signals are commenced responsive to a low resolution timing signal.