Rate Determination Apparatus for FSK Modulated Frames
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Solution Overview
Problem
Existing wireless communication systems using FSK modulation, such as IEEE 802.15.4g, face challenges in determining bit rates during data communication, especially when switching between different bit rates, leading to inefficiencies and increased power consumption due to the need for control communication and mode switching packets.
Innovation Solution
A rate determination apparatus comprising a reception unit, symbol rate detection unit, multilevel symbol detection unit, and bit rate determination unit, which detects symbol rates based on preamble periods and multilevel symbols from received FSK-modulated frames, allowing for accurate bit rate determination without requiring control communication for rate switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control communication and mode switching packets are used to switch bit rates, then bit rate switching capability is achieved, but communication efficiency decreases and power consumption increases
Solution Approach 1:
The receiver automatically detects the bit rate of incoming frames by analyzing the preamble period and multilevel symbols without requiring the transmitter to send control packets or mode switching information. This self-service mechanism eliminates the overhead of control communication while maintaining adaptability to different bit rates.
Solution Approach 2:
The patent extracts the bit rate detection function from the control communication framework and implements it directly in the data communication path by analyzing inherent frame structures (preamble and symbols). This separation removes the need for dedicated mode switching packets while preserving bit rate adaptability.
2Adaptability or versatility
If control communication and mode switching packets are used to switch bit rates, then bit rate switching capability is achieved, but power consumption increases
Solution Approach 1:
The receiver performs autonomous bit rate detection by processing the received frame's preamble and symbol structures without requiring additional control packets from the transmitter. This eliminates the energy expenditure associated with transmitting and processing mode switching commands while maintaining full bit rate adaptability.
3Adaptability or versatility
If existing FSK modulation techniques are used, then multiple bit rate communication is enabled, but bit rate determination during data communication becomes difficult
Solution Approach 1:
The patent incorporates detectable features (specific preamble periods and multilevel symbol structures) that are prepared in advance within the frame structure itself. These pre-built indicators allow the receiver to determine the bit rate directly from the data frames without requiring separate control communication, thus enabling both multiple bit rates and easy detection.
Data Source
AI summary
A rate determination apparatus 1 includes a reception unit 2 configured to receive a transmission frame modulated by an FSK modulation scheme, a symbol rate detection unit 3 configured to detect a symbol rate based on a period of a preamble portion in the received transmission frame, a multilevel symbol detection unit 4 configured to detect a multilevel-modulated multilevel symbol based on a frequency deviation in the received transmission frame, and a bit rate determination unit 5 configured to determine a bit rate based on the detected symbol rate and the detected multilevel symbol. Then, the bit rate can be determined during communication.