| Software Defined Radio (SDR) is a design idea which uses softwareprogramming to achieve of the specific features of the radio,based on a universal,standardized and modular hardware platform.The Software CommunicationsArchitecture (SCA) is an open architecture of the Software Defined Radio (SDR),which is independent of the concrete implementation. Waveform implements thecommunication functions in SCA system, so the waveform development plays a veryimportant role in the process of developing radios based on SCA. SCA through thedefinition of a variety of device interface to shield the implementation details of thehardware features, so that the waveform application development independent of theunderlying hardware platform.In-depth research of the MHAL of SCA supplementary specificartion,this paperdesigned a DSP-based portable SCA waveform component interface program.Theprogram redesigned the MHAL frame format, based on container and componentmodel, we design high-performance, standardized interface to DSP waveformcomponents to improve the portability and reusability of components, which greatlyimprove the modularity of the DSP waveform. the article base on802.11a protocol,in-depth research on OFDM baseband algorithm, in accordance with the principle ofiterative and incremental development, designed baseband transmitter and receivermodels, including the convolution coding, convolutional punctured, viterbi decoder,IFFT/FFT, interleaving and deinterleaving, inserting pilot and inserting preamblesequence components.Finally, in a software radio platform TechV, the simulation tests on the design ofthe individual core components.This builted the module using object-oriented C++programming language, so that the component has good versatility andportability,meanwhile that can effectively improve the soft degree of reuse of thewireless communication system components, saving the cost of design anddevelopment and shorten the time period of the developers. |
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