Mobile FM Modulator Auto-Tuning Using Location-Based Channel Search
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Solution Overview
Problem
Mobile devices with integrated FM modulators often face challenges in providing high-quality audio due to their small size and limited speaker quality, especially in environments like cars or with groups of people, as they struggle to find and maintain optimal frequencies with minimal noise.
Innovation Solution
A method and system for automatically tuning an FM modulator in mobile devices by obtaining the device's geographical location, searching a database for available frequencies, analyzing channel quality, and assigning the best frequency, while also detecting and responding to commands for frequency changes or incoming signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the mobile device uses a small speaker to provide audio output, then the device maintains portability and mobility, but the audio quality deteriorates in environments like cars or with groups of people
Solution Approach 1:
The patent introduces an FM transmitter as an intermediary device that converts audio signals from the mobile device's small speaker into FM radio signals. These signals can be received by external FM radios with larger speakers, effectively bypassing the limitation of the small built-in speaker while maintaining the portability of the mobile device.
2Adaptability or versatility
If the FM modulator manually searches for available frequencies, then the device can find suitable transmission channels, but the process is time-consuming and complex for users
Solution Approach 1:
The patent pre-stores frequency information and channel availability data in a database within the mobile device. When the FM modulator needs to transmit, the system automatically queries this pre-prepared database to quickly identify suitable frequencies, eliminating the need for manual scanning and trial-and-error tuning by the user.
Solution Approach 2:
The system performs automatic frequency selection and channel quality analysis without requiring user intervention. The mobile device independently queries the database, analyzes channel conditions, selects optimal frequencies, and configures the FM modulator automatically, making the entire process self-serving and user-free.
3Reliability
If the device continuously monitors channel quality to maintain optimal transmission, then audio quality is preserved, but energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the system performs channel quality analysis at periodic intervals or at key transmission milestones. The FM modulator transmits test signals at predetermined intervals and evaluates channel conditions only at these moments, maintaining audio quality while significantly reducing the energy expenditure associated with constant monitoring.
Data Source
AI summary
A method for automatically tuning a frequency modulator in a mobile device is described. The geographical location of the mobile device is obtained. A database of one or more frequencies associated with the geographical location of the mobile device is searched. Quality associated with channels of the one or more frequencies is analyzed to identify at least one available channel at a first frequency. The first frequency is assigned to an FM modulator. The FM modulator is integrated as a part of the mobile device. A determination is made as to whether a command to search for a second frequency is received. If the command to search for the second frequency is not received, a signal is transmitted on the first frequency by the FM modulator.