Error performance enhancement and complexity reduction in OFDM systems via coordinate interleaving under practical impairments

Authors

Mustafa Anıl REŞATFollow
Armed TUSHAFollow
Seda Doğan TUSHAFollow
Serdar ÖZYURTFollow
Hüseyin ARSLANFollow

DOI

10.55730/1300-0632.4053

Abstract

In this work, subcarrier coordinate interleaving (CI) is implemented to orthogonal frequency division multiplexing (OFDM) systems with the aim of both enhancing the error performance and reducing the implementation complexity. To this end, the modulated symbols are independently chosen from a modified M-ary amplitude-shift keying signal constellation under a specific CI strategy. In addition to doubling the diversity level of the original OFDM scheme, the adopted CI approach also drastically reduces the inverse fast Fourier transform (IFFT) size at the transmit side by guaranteeing the first half of the input vector to be identical with the second half at the input to the IFFT block. It is further demonstrated that the proposed system has the ability to enhance the robustness against common practical impairments such as insufficient cyclic prefix and phase noise. The closed-form expression of symbol error probability of the system is derived and confirmed with the simulation results.

Keywords

Orthogonal frequency division multiplexing, signal space diversity, coordinate interleaving, intersymbol interference, phase noise

First Page

21

Last Page

33

Recommended Citation

REŞAT, Mustafa Anıl; TUSHA, Armed; TUSHA, Seda Doğan; ÖZYURT, Serdar; and ARSLAN, Hüseyin (2024) "Error performance enhancement and complexity reduction in OFDM systems via coordinate interleaving under practical impairments," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 32: No. 1, Article 2. https://doi.org/10.55730/1300-0632.4053
Available at: https://journals.tubitak.gov.tr/elektrik/vol32/iss1/2