nxt_stat.m

802.15 dsss 物理协议层方针代码

function [next_state,memory_contents]=nxt_stat(current_state,input,k)
%Next state matrix
%
% determine the next sate of each current state
%
% Arguments:   current_state - decimal data
%                        input - input binary data: 0 or 1
%                        k - constraint length
%                        next_state - decimal data 
%                        memory_contents: input data plus current state to
%                                                        determine the branch output
%Author:    Hantao Liu
%
%==============================================================
%transfer the current_state to binary data
binary_state=deci2bin(current_state,k-1);
%determine the next state
next_state_binary=[input,binary_state(1:k-2)];
%transfer the next state to decimal data
next_state=bin2deci(next_state_binary);
%determine the memory contents
memory_contents=[input,binary_state];