Discrete Artificial Bee Colony for Computationally Efficient Symbol Detection in Multidevice STBC MIMO Systems

Pseudocode 4

The DABC onlooker bee phase pseudocode.

(1) Calculate probability values 𝑝_𝑖 for 𝑥^𝑖,∀𝑖 using (11),

(2)  𝑤=1; 𝑖=1;

(3) for 𝑤=1,…,𝑁, %(𝑤 corresponds to the 𝑤th onlooker bee)%

(4)  if rand>𝑝_𝑖 then, %(select the 𝑖th employed bee to follow)%

(5)   Select a random food source 𝑙,  𝑙≠𝑖∈{1,2,…,𝑁},

(6)   Select a random component 𝑗, 𝑗∈{1,2,…,𝐷},

(7)   𝑣^𝑖_𝑗=randint𝑥^𝑙_𝑗,2𝑥^𝑖_𝑗−𝑥^𝑙_𝑗,

(8)   𝑡^𝑖=𝑡^𝑖+1,

(9)   if 𝑣^𝑖 ≠ 𝑥^𝑖 then,

(10)    Evaluate 𝐹𝑣^𝑖,

(11)    𝑥^𝑖←𝑣^𝑖,

(12)    𝑡^𝑖=0,

(13)   end if,

(14)   𝑤=𝑤+1,

(15)  end if,

(16)  𝑖=𝑖+1;

(17)  if 𝑖>𝑁 then 𝑖=1; %(reset 𝑖)%

(18) end for,