Radio Communication Apparatus Symbol Timing Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radio communication systems, especially those used in base stations for simultaneous reception and transmission, maintaining a stable symbol transmission rate is challenging due to variations in symbol reception rate, leading to errors and reduced performance.
Innovation Solution
A radio communication apparatus and method that includes a clock reproducer unit, FIFO buffers, and a controller unit to detect symbol timing from the Nyquist point, control the generation of symbols, and manage data pieces in buffers to maintain a constant symbol transmission rate, using a single timer logic and minimizing power and cost by avoiding the need for separate timer logics for reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the symbol timing is adjusted to follow the symbol reception rate, then the receiving performance is improved, but the symbol transmission rate becomes unstable
Solution Approach 1:
The patent separates the timing control functions by introducing two distinct timer logics: one for reception timing adjustment and another for transmission timing stabilization. This segmentation allows independent optimization of receiving performance and transmission rate stability without mutual interference.
Solution Approach 2:
The patent introduces an intermediary mechanism (controller unit) that manages the relationship between reception timing and transmission timing. The controller monitors the symbol reception rate changes and adjusts the transmission timing accordingly, acting as a mediator to maintain transmission stability while allowing reception optimization.
2Stability of the object's composition
If separate external timer logics are provided for reception and transmission, then the symbol transmission rate stability is improved, but the apparatus cost and power consumption increase
Solution Approach 1:
The patent merges the control functions of multiple timer logics into a single integrated controller unit. This unified controller manages both reception timing adjustment and transmission timing stabilization, reducing the number of independent timer logic units needed while maintaining transmission rate stability.
Solution Approach 2:
The controller unit is designed with multi-functionality, handling both reception timing management and transmission timing control within a single device. This universal approach eliminates the need for separate dedicated timer logics for each function, reducing apparatus complexity and power consumption.
3Stability of the object's composition
If separate external timer logics are provided for reception and transmission, then the symbol transmission rate stability is improved, but the number of interrupt ports occupied increases
Solution Approach 1:
The patent combines multiple timing control functions into a single controller unit that uses one interrupt port. This merging approach consolidates the interrupt handling for both reception and transmission timing, reducing the total number of interrupt ports required compared to using separate timer logics.
Solution Approach 2:
The controller unit serves multiple timing control purposes through a single interrupt interface, demonstrating multi-functionality that reduces the occupation of interrupt ports while maintaining the ability to stabilize transmission rate and adjust reception timing.
Data Source
AI summary
A radio communication apparatus includes a clock reproducer unit which repetitively detects a symbol timing from a Nyquist point in detection-result data. A symbol generator unit controllably generates or non-generates a to-be-transmitted symbol or symbols at every symbol timing detected by the clock reproducer unit, converts the to-be-transmitted symbol or symbols into modulating data pieces, and outputs the modulating data pieces to a FIFO buffer. A D/A converter reads out modulating data pieces from the FIFO buffer at a predetermined rate and converts the read-out modulating data pieces into an analog modulating signal for use in modulation of a carrier. A controller unit controls a number of the to-be-transmitted symbol or symbols generated by the symbol generator unit at every symbol timing to hold a number of modulating data pieces in the FIFO buffer in a predetermined range.