Multi-Band Frequency Signal Generation Using Mixers and Dividers
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Solution Overview
Problem
Current wideband communication systems, particularly those using Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM), face challenges in efficiently generating frequency signals for various band groups, limiting their ability to support multi-band multi-mode communication effectively.
Innovation Solution
A frequency signal generation apparatus is designed to generate frequency signals for multiple band groups by incorporating a control circuit, reference and assistance frequency signal generators, mixers, switches, and dividers, which work together to produce signals for 1, 3, 4, and 6 MB-OFDM band groups, enabling flexible frequency allocation and support for multi-band communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate frequency signal generation apparatuses are used for different band groups, then each band group can be generated with dedicated optimization, but the overall system complexity and the number of required apparatuses increase
Solution Approach 1:
The patent combines multiple frequency signal generation apparatuses into a single integrated apparatus that can generate frequency signals for multiple band groups (1st, 3rd, 4th, and 6th MB-OFDM band groups). The integrated apparatus includes a control circuit, reference frequency signal generator, assistance frequency signal generator, mixer, switch, and divider that work together to produce all required frequency signals, thereby reducing the total number of apparatuses while maintaining generation capability for all band groups
Solution Approach 2:
The frequency signal generation apparatus is designed with multi-functionality to generate frequency signals for different band groups using the same core components. The control circuit can configure the reference frequency signal generator, assistance frequency signal generator, mixer, and divider to produce frequency signals for 1st, 3rd, 4th, and 6th MB-OFDM band groups, making a single apparatus universal across multiple band groups rather than requiring separate dedicated apparatuses for each
2Adaptability or versatility
If a single integrated frequency signal generation apparatus is used for all band groups, then the number of apparatuses is reduced and flexibility is improved, but the internal circuit complexity increases
Solution Approach 1:
The integrated frequency signal generation apparatus is segmented into distinct functional modules: a control circuit for configuration, a reference frequency signal generator for generating base frequency signals, an assistance frequency signal generator for generating additional frequency components, a mixer for combining frequency signals, a switch for signal routing, and a divider for frequency division. This segmentation allows each module to perform a specific function while contributing to the overall capability of generating multiple band group signals
Solution Approach 2:
The apparatus employs dynamic configuration through the control circuit that can adjust the operation of various components based on the required band group. The switch dynamically routes signals between different paths, and the frequency signal generation parameters can be changed to support different MB-OFDM band groups (1st, 3rd, 4th, and 6th), making the system adaptable rather than fixed
Data Source
AI summary
A frequency signal generator includes a controller for generating a frequency generation signal, a reference frequency signal generator for generating a first frequency signal and generate a second frequency signal by dividing a first frequency signal from the controller, an assistance frequency signal generator adapted to generate a third, fourth, and fifth frequency signals and to output a sixth frequency signal in response to an assistance frequency select signal, a mixer for selecting a sign of the sixth frequency signal in response to a sign select signal and generating a seventh frequency signal and a eighth frequency signal by mixing the sixth frequency signal of the selected sign and the first frequency signal, a switch adapted to output the seventh or eighth frequency signal in response to a dividing select signal, and a first divider outputting a ninth frequency signal by dividing the eighth frequency signal from the switch.