Research Information System
International Journal of Communication Systems, vol.37, no.14, 2024 (SCI-Expanded, Scopus)
It is well known that hardware impairments (HWIs) can worthy reduce the wireless system performance at high carrier frequencies by showing random effects. Most current researches for 5 GB systems assume that transmitters and receivers (transceivers) are perfectly equipped. But wireless transceivers ((Formula presented.)) are affected by HWIs in practice. Considering the previous studies in the literature, it is reported that HWIs have devastating effects on the performance of OFDM and OFDM-index modulation (IM) systems with fading channels. In this paper, in-phase and quadrature phase imbalance (IQI), which is the one of most HWIs between transmitter and receiver in wireless communication systems, is examined on OFDM-IM system over Rayleigh and Nakagami- (Formula presented.) fading channels. Two well-known detectors, the maximum likelihood (ML) detector and the log-likelihood ratio (LLR) detector are used under the effect of the IQI at (Formula presented.). Error performance analyzes over fading channels of the IQI effect on OFDM-IM system are realized first theoretically and then by computer simulations. Results obtained for the presence of IQI at (Formula presented.) show that a performance evaluation based only on the presence of IQI in the receiver would be optimistic and misleading in terms of the performance of real-life OFDM-IM systems.