A Heterogeneous Multi-core DSP Architecture for OFDM-Based Communication Systems

Xu Li, An Peng, Wang Yu, Li Jun
<span title="2016-10-31">2016</span> <i title="Science and Engineering Research Support Society"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/aoxdam2x3rcszlweqkjkp7qcyy" style="color: black;">International Journal of Future Generation Communication and Networking</a> </i> &nbsp;
As a kind of wireless communication system, OFDM systems are widely used in the current and next generation wireless communications. According to the characteristics of OFDM systems, this paper proposed a new heterogeneous multi-core DSP architecture for OFDM system -HeteroM-DSP. Hetero M-DSP based on VLIW DSP core, which has good Data-Level Parallelism and Instruction-Level Parallelism. Each independent DSP core through sharing memory, task scheduling bus and bus controller based open-ring
more &raquo; ... rconnection, improve the communications parallelism between DSP cores. Meanwhile, in order to implement different OFDM systems flexibly, each DSP core has different computational capabilities. It is also improved processor performance/ power rate. Experimental results for the IEEE 802.11a receiver show that Hetero M-DSP can efficiently use for OFDM systems. 328 throughput, then DSP needs certain flexibility while guaranteeing throughput of the system. Directing at characteristics of OFFDM system, this paper proposed a kind of heterogeneous multi-core DSP architecture-HeteroM-DSP used for OFDM system. HeteroM-DSP consists of DSP cores based on VLIW instruction set architecture with good instruction set parallelism and data-level parallelism. Each independent DSP core is interconnected through open-loop interconnection structure consisting of shared memorizer, task scheduling bus and bus controller, which improves parallelism of inter-nuclear communication of multi-core DSP. In the meantime, DSP cores have different computing power, making the processor be able to highly efficiently and flexibly realize various OFDM systems and further improve performance/power consumption ratio of the processor. This paper is arranged as follows: chapter two introduces relevant work of multi-core DSP; chapter three briefly introduces baseband digital signal processing of OFDM system; chapter four specific ly expounds HeteroM-DSP architecture; chapter five, taking IEEE 802.11a as an example, displays design flow of HeteroM-DSP and performance and power consumption analysis of the processor; the final part is the conclusion.
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