Hardware description systems could benefit from advances in programming language design. Recent research, in the area of rich type systems suggests hardware description languages could use types to (1) structure, (2) guarantee correctness, and (3) track properties of hardware descriptions

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In this paper, the implementation of software module using 'VHDL ' for Xilinx FPGA (XC2S30) based PID controller for DC motor speed control system is presented. The tools used for building and testing the software modules are Xilinx ISE 9.1i and ModelSim XE III 6.3c. Before verifying the design on FPGA the complete design is simulated using Modelsim Simulation tool. A test bench is written where, the set speed can be changed for the motor. It is observed that the motor speed gradually changes to the set speed and locks to the set speed.

Orthogonal Frequency Division Multiplexing (OFDM) is a Frequency Division Multiplexing (FDM) technique used as a digital multi-carrier modulation method. A large number of closely spaced sub carriers which are orthogonal are used to carry data on several parallel data streams. OFDM uses the spectrum efficiently compared to Frequency Division Multiple Access (FDMA) by spacing the channels much closer and creating all the carriers orthogonal to one another. Orthogonality of the carriers prevents interference between the closely spaced carriers and provides high bandwidth efficiency. This work focuses on design and implementation of OFDM transmitter and receiver. Corresponding blocks of OFDM transmitter and receiver includes Quadrature

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(1999-2000), and held a short Visiting appointment at Fachhochschule für Technik Esslingen,

Hardware description languages (HDLs) are used today to describe circuits at all levels. In large HDL programs, there is a need for source code reduction techniques to address a myriad of problems in design, simulation, testing, and formal verification. Program slicing is a static program analysis

In efforts to overcome the complexity of the syntax and the lack of formal semantics in conventional hardware description languages (most notably Verilog and VHDL), a number of approaches based on functional languages have been proposed. The merits of functional languages as hardware description

Hardware description language (HDL) based IP synthesis has been the industry standard in recent years. However, it has a number of problems. First, Verilog and VHDL are so low level that they are often compared to assembly languages

The Transmogrifier C hardware description language is almost identical to the C programming language, making it attractive to the large community of C-language programmers. This paper describes the semantics of the language and presents a Transmogrifier C compiler that targets the Xilinx 4000 FPGA