Our goals in this paper are to investigate the use of AFH tech- niques aimed at modifying the Bluetooth frequency hoping se- quence in the presence of WLAN direct sequence spread spec- trum devices. Mainly, under what conditions – i.e., interference levels, topologies, scenarios, and applications – is it practical to use either AFH or BIAS? Which mechanisms is more effective for a given application? How fast can either technique adjust to changes in the environment? We conduct numerous simula- tion experiments to evaluate and quantify the operation range of AFH and BIAS. To answer the question of application sensitiv- ity, we consider four applications, namely, voice, video, HTTP, and FTP. We set the application profiles available in the OPNET library including the details of the entire TCP/IP stack.
In section II, we describe an AFH algorithm implementation. In section III, we describe BIAS. Section IV discusses channel estimation techniques and their use with interference mitigation schemes. In section V, we consider several experiments to eval- uate the performance of AFH and how it compares to BIAS. In section VI, we offer concluding remarks.