Shared DSP Controller for Cellular and Satellite Radio Integration
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Solution Overview
Problem
Existing proposals for combining cellular phones and satellite radios fail to efficiently utilize shared resources, such as antennas and processing capabilities, leading to suboptimal performance and resource management in integrated products.
Innovation Solution
A combined cellular phone and satellite radio system that shares a digital signal processor (DSP) and a controller module, allowing for efficient processing and storage of audio signals, control signaling, and integration with a global positioning satellite (GPS) receiver, along with a shared user interface, to optimize resource usage and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate controllers are used for cellular phone and satellite radio modules, then each module can operate independently with full processing capability, but device complexity and resource utilization efficiency deteriorate
Solution Approach 1:
The controller is designed with a digital signal processor that can function as a shared resource for both cellular phone and satellite radio modules. The DSP executes task scheduling mechanisms that allocate processing time and resources to different modules based on operational needs, enabling one controller to perform multiple functions that would traditionally require separate dedicated controllers.
2Productivity
If a shared digital signal processor is used for both cellular phone and satellite radio modules, then resource utilization efficiency improves, but processing speed and response time for individual modules may deteriorate
Solution Approach 1:
The digital signal processor implements periodic task scheduling where processing tasks are divided into time slots and executed in a cyclic manner. The scheduler alternates between cellular phone module tasks and satellite radio module tasks, ensuring that each module receives dedicated processing attention periodically. This approach maintains high resource utilization while guaranteeing minimum processing speeds for critical operations in each module.
3Device complexity
If audio signals from both modules are processed through a single stereo decoder, then device complexity reduces, but audio processing capability and quality may deteriorate
Solution Approach 1:
The stereo decoder is designed with dynamic switching capability that can selectively route audio signals from either the cellular phone module, satellite radio module, or both simultaneously. The controller dynamically configures the decoder's operation mode based on which modules are active, ensuring optimal audio processing quality while using a single decoder resource. This dynamic adaptation maintains audio processing capability equivalent to having separate decoders for each module.
Data Source
AI summary
A method (300) and system (100) for sharing a controller for a combined cellular phone and satellite radio includes a cellular phone module (102), a satellite radio module (106), and a controller module (108) having a digital signal processor (120) shared by the cellular and satellite modules. A base band processor (118) of the satellite module can provide a digital audio output (107) to a stereo decoder (122) of the controller module and a base band module (112) of the cellular phone module can provide a digital audio output (109) to the stereo decoder. The base band processor of the satellite module can provide compressed audio (111) to the DSP for longer term storage within a memory (129). The DSP can also receive control signaling (113) from the base band processor of the satellite radio module and control signaling (117) from the base band processor of the cellular phone module.