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Random Receiver Orientation Effect on Channel Gain in LiFi Systems

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Original languageEnglish
Title of host publicationIEEE Wireless Communications and Networking
Publication statusPublished - 31 Oct 2019
EventIEEE Wireless Communications and Networking Conference - Marrakech, Morocco
Duration: 15 Apr 201919 Apr 2019


ConferenceIEEE Wireless Communications and Networking Conference
Abbreviated titleIEEE WCNC
Internet address


Light-Fidelity (LiFi) has been considered as a complementary technology to radio frequency (RF) communications. The reliability of a LiFi channel highly depends on the availability and alignment of line-of-sight (LOS) links. In this study, we investigate the effect of receiver orientation including both polar and azimuth angles on the LOS channel gain in a LiFi system. The optimum tilt angle is calculated, which depends on both the user’s location and direction. The probability density function (PDF) of signal-to-noise ratio (SNR) is derived for on-off keying (OOK) modulation. Using the derived PDF of SNR, the bit-error ratio (BER) of OOK in an additive-white Gaussian noise (AWGN) channel with random orientation of the receiver is evaluated. It is shown that the effect of random orientation is negligible if the optimum tilt angle is chosen. Finally, we assess the effect of random orientation on the Shannon-Hartley upper bound capacity.


IEEE Wireless Communications and Networking Conference


Marrakech, Morocco

Event: Conference

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