Interference mitigation in coexistence of WLAN network with radar

Coexistence between 802.11 wireless local area network (WLAN) and radars operating in co/adjacent channel scenarios (notably 5 GHz) is a problem of considerable importance that requires new innovations. We propose a modified Wi-Fi link design that mitigates the interference from a pulsed search rada...

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Bibliographic Details
Main Authors: Mehrnoush, Morteza, Roy, Sumit
Format: Conference Proceeding
Language:English
Subjects:
Interference
Interference Mitigation
Network Coexistence
OFDM
Radar
Radar antennas
Receivers
Wireless fidelity
WLAN 802.11
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Summary:Coexistence between 802.11 wireless local area network (WLAN) and radars operating in co/adjacent channel scenarios (notably 5 GHz) is a problem of considerable importance that requires new innovations. We propose a modified Wi-Fi link design that mitigates the interference from a pulsed search radar such that the WLAN network continues to operate outside the exclusion region with no noticeable performance degradation. For low density parity check (LDPC) encoding adopted in high throughput WLANs such as 802.11n and .ac, the modified receiver includes a new interleaver and a log-likelihood ratio (LLR) mapping function to successfully mitigate the impact of radar interference. We evaluate, via simulations, the impact of interleaver length and LLR mapping function parameters to determine the optimum combination that yields the desirable frame error rate (FER) performance.
ISSN:2375-5318
DOI:10.1109/RADAR.2017.7944208