SocLib Components General Index

Mapping

1) Functional Description

The mapping operation consists in modulating the inputs bits into symbols (complex signals). In our system, the used mapping is a QPSK (Quadrature Phase-Shift Keying) modulation. This means each symbol is coded by two bits. The architecture of the mapping component is presented in the figure 1. It is composed of a mapping core and a MWMR wrapper. The wrapper is used to interface the core and the MWMR controller avalaible here VciMwmrController.

2) Component definition & usage

Component definition

• source:trunk/soclib/soclib/module/ofdm_chain_components/mapping/caba/metadata/mapping.sd​

Usage

Mapping has a fifo_depth parameter, which defines the fifo depth for the input. For example with a FIFO depth equal to 16 :

Uses('Mapping', fifo_depth = 16);

3) CABA Implementation

CABA sources

• interface : source:trunk/soclib/soclib/module/ofdm_chain_components/mapping/caba/source/include/mapping.h​
• implementation : source:trunk/soclib/soclib/module/ofdm_chain_components/mapping/caba/source/src/mapping.cpp​

CABA Constructor parameters

Mapping(
     sc_module_name name,                     // Instance name
     int ncycles)  // Number of computation cycles

CABA Ports

• sc_in<bool> p_resetn : hardware reset
• sc_in<bool> p_clk : clock
• soclib::caba::FifoOutput<uint32_t> p_to_ctrl : interface from the mapping to the MWMR controller
• soclib::caba::FifoInput<uint32_t> p_from_ctrl : interface from the MWMR controller to the mapping

4) TLM-T Implementation

The TLM-T implementation is not yet available.