Abstract
A superheterodyne transmission scheme is adopted and analyzed in a 300 GHz wireless point-to-point link. This was realized using two different intermediate frequency (IF) systems. The first uses fast digital synthesis which provides an IF signal centered around a carrier frequency of 10 GHz. The second involves the usage of commercially available mixers, which work as direct up- and down-converters, to generate the IF input and output. The radio frequency components are based on millimeterwave monolithic integrated circuits at a center frequency of 300 GHz. Transmission experiments over distances up to 10 m are carried out. Data rates of up to 60 Gbps using the first IF option and up to 24 Gbps using the second IF option are achieved. Modulation formats up to 32QAM are successfully transmitted. The linearity of this link and of its components is analyzed in detail. Two local oscillators (LOs), a photonics-based source and a commercially available electronic source are employed and compared. This work validates the concept of superheterodyne architecture for integration in a beyond-5G network, supplying important guidelines that have to be taken into account in the design steps of a future wireless system.
Highlights
It is a well-known fact that the demand for wireless data is constantly growing at an exponential rate
The radio frequency (RF) system consists of a 300 GHz transmitter and receiver based on monolithic millimeterwave integrated circuit (MMIC) packaged in split-block waveguide modules with a WR-3 output at the RF port and a WR-12 at the local oscillators (LOs) input
With the above mentioned dependency between bit error rate (BER) and error vector magnitude (EVM), this translates into an EVM smaller than the following values under the assumption of an Additive White Gaussian Noise channel (AWGN): for QPSK 26.5%, for 16QAM 15.2%, and for 64QAM 6.8%
Summary
Cite this article: Dan I, Ducournau G, Hisatake S, Szriftgiser P, Braun R-P, Kallfass I (2020). A superheterodyne 300 GHz wireless link for ultra-fast terahertz communication systems. A superheterodyne transmission scheme is adopted and analyzed in a 300 GHz wireless pointto-point link. This was realized using two different intermediate frequency (IF) systems. The first uses fast digital synthesis which provides an IF signal centered around a carrier frequency of 10 GHz. The second involves the usage of commercially available mixers, which work as direct up- and down-converters, to generate the IF input and output. The radio frequency components are based on millimeterwave monolithic integrated circuits at a center frequency of 300 GHz. Transmission experiments over distances up to 10 m are carried out. Modulation formats up to 32QAM are successfully transmitted The linearity of this link and of its components is analyzed in detail. This work validates the concept of superheterodyne architecture for integration in a beyond-5G network, supplying important guidelines that have to be taken into account in the design steps of a future wireless system
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