2 Bit generation and mapping with SIMULATION MODEL

In this project we developed a general procedure for each modulation. The following block diagram shows the simulation model.

Fig 2.1: Simulation model

The brief description of each simulation block is follows.

2.1 Bit Generation

The Bit Generation block main function is to generate the bit with equal probability.

2.2 Mapping

The main function mapping is to covertthe bitstream into symbols according to each modulation scheme.

For BPSK each zero is mapped to +1 and ones are mapped to -1. In QPSK, the mapper block converts each two bits block into an in phase component and a quadrature component.

Table 2.1:

For QAM we took the blocks of three bits and mapped the bits according to the given gray coding.