Cancellation of Zigbee interference in OFDM based WLAN for multipath channel
نویسندگان
چکیده
Zigbee is one of the major sources of interference in 2.4GHz band for WLANs. It is seen whenever any Zigbee system is operating near to the WLAN system and transmitting signal at same frequency, time as of WLAN’s, the later ones performance detoriate severely. So in this paper an algorithm is proposed to estimate Zigbee interference component present in all OFDM based WLANs sub-carriers and cancel out the Zigbee interference from the received signal of WLANs receiver for multipath fading channels in frequency domain. Simulation results shows for high SNR values full cancellation of Zigbee interference or zero BER is possible.
منابع مشابه
Maximising Signal Strength inside Buildings for Wireless Lan Systems Using Ofdm
Propagation inside buildings suffer from large shadowing and high multipath effects. This is a serious problem for Wireless Local Area Network (WLAN) systems. OFDM has a high multipath tolerance and this paper shows how this can be used to overcome the problems due to shadowing. OFDM allows a base station to transmit and receive the same signal at the same frequency from multiple locations, at ...
متن کاملEnabling Coexistence of ZigBee and WiFi
Spectrum scarcity is known to be main obstacle to scaling of wireless network capacity. Spectrum sharing is a solution to this problem. The unlicensed ISM band is getting crowded by WLAN and WPAN users and devices. Spectrum sharing within the devices of same network is not a problem. But coexistence of WLAN and WPAN (eg: WiFi and ZigBee) is a challenging problem. Spectrum sharing among these ne...
متن کاملEmpirical Mode Decomposition based Adaptive Filtering for Orthogonal Frequency Division Multiplexing Channel Estimation
This paper presents an empirical mode decomposition (EMD) based adaptive filter (AF) for channel estimation in OFDM system. In this method, length of channel impulse response (CIR) is first approximated using Akaike information criterion (AIC). Then, CIR is estimated using adaptive filter with EMD decomposed IMF of the received OFDM symbol. The correlation and kurtosis measures are used to sel...
متن کاملAn Interference Cancellation Scheme for TFI-OFDM in Time-Variant Large Delay Spread Channel
In the mobile radio environment, signals are usually impaired by fading and multipath delay phenomenon. In such channels, severe fading of the signal amplitude and inter-symbol-interference (ISI) due to the frequency selectivity of the channel cause an unacceptable degradation of error performance. Orthogonal frequency division multiplexing (OFDM) is an efficient scheme to mitigate the effect o...
متن کاملTurbo Equalized Double Window Cancellation and Combining Robust to Large Delay Spread Channel
In orthogonal frequency division multiplexing (OFDM) the multipath exceeding the guard interval (GI) causes inter-symbol interference (ISI) and inter-carrier interference (ICI), thereby making it difficult to achieve high data rate transmission. In this paper, the double window cancellation and combining (DWCC), introduced in [14], is analyzed by investigating SINR distribution under different ...
متن کامل