Changes between Version 7 and Version 8 of ConceptandMotivation
- Timestamp:
- 07/02/10 21:41:12 (16 years ago)
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ConceptandMotivation
v7 v8 20 20 21 21 22 While defining a common framework for developing and deploying SDR applications it is important to eliminate any platform (hardware and supporting software) dependency. Radio applications are built through a set of precedence-constrained modules. (These modules may also be called “objects”.) Each module represents a more or less complex signal processing block that acquires information from preceding objects in the processing chain and delivers the processed information to the following modules. ALOE assumes that object interfaces are unknown at design time. This enables dynamically composing and recomposing processing chains at execution time while integrating the objects that assemble the desired waveform. 23 22 24 === Layers === 23 24 While defining a common framework for developing and deploying SDR applications it is important to eliminate any platform (hardware and supporting software) dependency. Radio applications are built through a set of precedence-constrained modules. (These modules may also be called “objects”.) Each module represents a more or less complex signal processing block that acquires information from preceding objects in the processing chain and delivers the processed information to the following modules. ALOE assumes that object interfaces are unknown at design time. This enables dynamically composing and recomposing processing chains at execution time while integrating the objects that assemble the desired waveform.25 25 26 26 The figure shows the ALOE layers. The hardware layer typically consists of several processors or processing elements (PEs), which are physically interconnected. The ALOE Layer abstracts the hardware platform, providing a homogeneous execution environment, the ALOE platform, to applications. The abstract application layer models a radio application or waveform by means of the task graph. It abstracts the waveform modules, providing information about the involved tasks (modules or objects), their precedence constraints and data flow requirements. The real application layer uses the services or functionalities provided by the ALOE layer for assembling the complete waveform and distributing its modules among the available hardware resources.
