Research Article
Combined Sector and Channel Hopping Schemes for Efficient Rendezvous in Directional Antenna Cognitive Radio Networks
(1) for do  (2) if () then  (3) Invoke Algorithm 1 with and to construct  a round of an PS sequence.  (4) generate by repeating for times.  (5) Map the column of the matrix with .  (6) .  (7) else  (8) Invoke Algorithm 2 with and to construct  a round of an ES sequence.  (9) generate by repeating for times.  (10) Map the column of the matrix with .  (11) .  (12) end if  (13) end for 
