Weibull and Suzuki fading channel generator design to reduce hardware resources

Abstract

Abstract-A novel and efficient method for emulating a Weibull fading channel is presented. The proposed Weibull fading channel generator employs CORDIC technology which can work without the need for a multiplier, a scarce FPGA resource when emulating wireless channels. Using the proposed hardware implementation structure, the resource consumption is effectively reduced. Further, the proposed generator is able to produce the Weibull fading channel with arbitrary values of the shape parameter γ, in contrast to existing state-of-the-art methods, which can only generate Weibull channels with fixed values of γ. In simulation, the PDF of the Weibull fading channel agrees closely with the theoretical values. The simulation results also show the effectiveness of the proposed structure to generate Lognormal and Suzuki fading channels.

Improving the Performance of Turbo-Coded Systems under Suzuki Fading Channels

“…The noise PDFs that are derived in Equations (13) and (14) are utilized in this section to calculate the LLR equations for the coded system, such that…”

“…Figures 4 and 5 compared the performance of the turbo-coded system with the proposed LLRs that was derived utilizing both Equation (13) and (14) PDFs and the Gaussian based-LLRs for rates 1/3 and 1/2, respectively. It was observed that the proposed LLRs with the first approximation improved the performance of the turbo-coded system by more than 2 dB at BER = 10 −5 for both modulation constellations and for both ratios.…”

“…In Reference [13], separating slow and fast fading was considered, utilizing a moving average filter in which Rayleigh and log-normal distributions were individually used to analyze the effects of multipath fading and shadowing, respectively. An efficient and novel method was proposed in Reference [14] to implement Weibull, log-normal, and Suzuki fading channels that utilize CORDIC technology that does not require a multiplier.…”

Performance Analysis of Alamouti Space Time Block Coding over Weibull Fading Channel in MIMO Systems

“…Literatürde bulunan performans araştırmalarının çoğu, dış ortamdaki kanal sönümlemesini modellemek için tercih edilen Rayleigh, Ricean ve Nakagami dağılımları üzerinde gerçekleştirilmiştir [10,11]. Son zamanlarda, MIMO sistemlerin hem iç hem de dış ortamlar için deneysel kanal ölçümlerine iyi uyum gösteren Weibull sönümleme kanalındaki performansı ilgi konusu olmuştur [12,13]. IEEE Taşınır Teknoloji Toplumu Radyo Yayılım Komitesi, kablosuz kanalı daha iyi modellediği gerekçesiyle Weibull modelini önermektedir [14].…”

Stability Analysis and Hardware Resource Optimization in Channel Emulator Design

“…The generation of Nakagami-m channels was investigated in [6], [7]. Indeed, Nakagami-m, Weibull, and Suzuki fading channels are obtained by transformation of Rayleigh distributed data [6]- [8]. Thus, we analyze the generation of Rayleigh channel in this paper.…”