Analysis of Channel Model for LAA-WLAN Coexistence with different OFDM Parameters between LAA and Wi-Fi

Abstract

In this work, the channel model for the asynchronous Wi-Fi and LAA signals is investigated, also taking into consideration the impairment of the OFDM parameters between LAA and Wi-Fi. Even for the same bandwidth, e.g., 20 MHz channel, OFDM parameters of LAA-LTE and Wi-Fi are different [1], [2]. In addition, the legacy Wi-Fi devices cannot receive or transmit synchronously with LAA-LTE. Thus, the orthogonality between the subcarriers is broken if LAA-LTE's signals are received at Wi-Fi devices and vice versa. In order to facilitate an analysis of the throughput, we should derive the distortion of LAA-LTE's signals received at Wi-Fi devices and the distortion of Wi-Fi's signals received at LAA-LTE devices due to the difference in OFDM parameters of LAA-LTE and Wi-Fi.