TDD Sampling Rate Conversion Circuit Switching
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Solution Overview
Problem
In wireless communication systems employing a time division duplex (TDD) scheme, the inefficiency in using hardware resources due to the separate implementation of up-converters and down-converters leads to reduced data processing speed and increased power consumption, as only one converter is active at a time, causing potential signal overlap and inefficient resource utilization.
Innovation Solution
A sampling rate conversion circuit capable of performing both up-conversion and down-conversion, with a switching signal controlling the conversion mode based on a timing advance (TA) value, allowing for appropriate switching periods to prevent signal overlap and optimize hardware resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate up-converters and down-converters are implemented in a TDD system, then signal conversion functions are provided, but hardware resource efficiency deteriorates and power consumption increases
Solution Approach 1:
The patent implements a universal sampling rate conversion circuit that can perform both up-conversion and down-conversion functions by switching its operating mode based on whether the system is in transmission or reception state. This multi-functional approach eliminates the need for separate dedicated converters, thereby reducing hardware resource requirements and power consumption while maintaining full signal conversion capability.
2Adaptability or versatility
If separate up-converters and down-converters are implemented, then signal conversion is enabled, but device complexity increases
Solution Approach 1:
The patent implements a universal sampling rate conversion circuit that can perform both up-conversion and down-conversion functions by switching its operating mode based on whether the system is in transmission or reception state. This multi-functional approach eliminates the need for separate dedicated converters, thereby reducing hardware resource requirements and power consumption while maintaining full signal conversion capability.
Solution Approach 2:
The patent merges the previously separate up-converter and down-converter into a single integrated sampling rate conversion circuit. By combining these functions and using a switching mechanism to select the appropriate conversion mode, the system reduces the number of hardware components while maintaining the ability to perform both up-conversion and down-conversion operations.
3Device complexity
If a single sampling rate conversion circuit is used for both up-conversion and down-conversion, then hardware resources are reduced, but signal overlap may occur without proper switching control
Solution Approach 1:
The patent employs a switching control mechanism that monitors the TDD system's operational state (transmission or reception) and dynamically switches the sampling rate conversion circuit between up-conversion and down-conversion modes. This feedback-based control ensures that the circuit performs the appropriate conversion function at the correct time, preventing signal overlap and maintaining signal integrity while utilizing a single hardware resource.
Data Source
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AI summary
An apparatus and a method for sampling a signal in a wireless communication system that employs a time division duplex (TDD) scheme are provided. According to various embodiments of the present disclosure, a method for a base station being operated in a wireless communication system that employs TDD comprises the steps of: determining a switching section for controlling a conversion mode of a sampling rate conversion circuit based on a timing advance (TA) value with respect to a signal transmitted by a terminal; generating a switching signal within the switching section; changing the conversion mode from a first mode to second mode in response to the switching signal; and changing a sampling rate of a transmission signal or reception signal based on the second mode. As a result, the transmission signal and the reception signal can be prevented from overlapping in the sampling rate conversion circuit that can perform both of up conversion and down conversion, and hardware resources for changing a sampling rate of a signal can be reduced.