KEYWORDS: Transmitters, Digital signal processing, Clocks, Data modeling, Visualization, Field programmable gate arrays, Orthogonal frequency division multiplexing, Rapid manufacturing, Systems modeling, Prototyping
In this paper a rapid prototyping design flow is presented and applied to a prototype of the base-band physical layer of a Hiperlan/2 WLAN transceiver. This physical layer is a high performance multi-rate system that contains computationally intensive algorithms. A new method for prototyping the design flow and verifying the process is to use the latest generation of system level design environments (visual data flow environment) for DSPs. The System Generator and Matlab/Simulink tools form a visual data flow environment for FPGA allow us to model DSP systems and explore algorithms. This environment also translates designs into hardware implementations that are faithful, synthesizable and efficient, which can be explored and refined in rapid prototyping platforms.
In this article we present a study and the corresponding implementation of low cost printed antennas in the 2,4GHz band. These antennas work with low cost transceivers that give a FR input/output signal in the band of interest. The work is part of a project in the field of sensor networks using technology such as Zigbee or even simpler and cheaper systems. We have focused our attention on parameters such as the antenna impedance, which is very important for achieving maximum power transfer with the transceiver while avoiding adaptation circuits. We are also interested in avoiding balums. We have analyzed these printed antennas in terms of their efficiency and radiation pattern using electromagnetic simulation software. Two structures have been evaluated and compared. The first is a structure derived from a monopole and slot antenna and the second is a printed patch antenna.