Abstract:
Prescaler is an electronic counting circuit used to reduce a high frequency electrical signal to a lower frequency by integer division. Prescaler can be used in communication to provide different frequencies from a single source for different users. So we can avoid the usage of different clock sources to provide access for users, their by reducing the power consumption. In order to understand this concept simple divide-by-16 Prescaler is designed for Convolution encoder and OFDM operates at the main clock source frequency. OFDM designed here effectively mitigates the ISI caused by delay spread of channels. So it is widely used multiplexing technique for communication. Convolution encoding is one of the good encoding techniques in telecommunication for transmitting digital signals without error. This is coded in verilog HDL, simulated on modelsim6.3f and implemented on Vertex-5 FPGA.

Keywords: Prescaler, OFDM-Orthogonal frequency division multiplexing, Convolution encoder.