Metody pro snížení rušení v bezdrátových sítích

In this dissertation thesis, the co-location interferences in the most popular wireless networks today ? the 802.11 WLAN ? are explored. The main topic of this thesis are the interferences caused by operation of several co-located radio devices on the adjacent frequency channels. The interference properties of DSSS and OFDM baseband modulations are discussed, as well as the impact of the RF transmit/receive chain. For evaluating the interferences in controlled experiments, RF emulation testbed was designed and built and several example measurements were done. In the final part of the dissertation, methods for interference mitigation in wireless networks are proposed and their feasibility discussed.