EXIST is an integrated environment for exploratory VLSI nrchitectural design implemented in the Smalltalk-80' environment. It consists of a functional simulator (INSIST), a floorplanner (FLOORIST) and a database (DATABIST). EXIST contains several unique features including: editing while in simulation, manual and automated hierarchical floorplan optimieation, and user-friendly interfnce based on the M V C paradigm of Smalltalk. These features make EXIST a promising environment for exploration of slternative VLSI architectures, such M RISC controllers.
Software defined radio (SDR) is g81mng much attention in many application fields, e.g. satellite communication (SATCOM). In this paper, the requirements of SDR architecture for SATCOM application are discussed and a novel Network on Chip (NoC) architecture proposal are presented in order to achieve these requirements. Compared with several common NoC architectures, the proposed NoC can reduce the number of butters used in the network and standardize the latency between two network entries. As a result, the communication cost and contention caused by the random placement of IP blocks of SDR system will be minimized. With the use of Open core protocol (OCP) interface between NoC and IPs, the reusability requirement of SDR system is achieved. The communication between two IPs of VDB SDR application is realized through OCP interface and the proposed NoC.
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