The exigent demand for transmitting high data rates over satellites, coupled with the challenge to maximize satellite mass efficiency, has necessitated that multiple carriers with high-order modulation share the same transponder's high-power amplifier (HPA) that is operated close to saturation. Several powerful technological solutions, applied at the transmitter, in the form of predistortion, and at the receiver, in the form of equalization, are explored in this chapter to minimize the resulting nonlinear distortion. To establish greater commonality with the emerging fifth-generation (5G) ecosystem, the second part of this chapter endeavors to apply orthogonal frequency-division multiplexing (OFDM) signaling for broadband satellite transmission in the forward direction, namely, from the gateway to terminals. 5G terrestrial systems continue to use OFDM air interface. The aforementioned powerful countermeasures are then generalized, utilized, and shown to exhibit excellent performance in allowing OFDM-based satellite systems to be competitive with, and in some cases surpassing, traditional systems that use single-carrier modulation (SCM) when employing high-order constellations and/or having multiple signals share the same transponder.

Chapter Contents:

• 8.1 Introduction
• 8.2 System description
• 8.2.1 Signal model
• 8.2.2 Satellite channel model
• 8.3 Multicarrier analysis of IMD
• 8.3.1 Multicarrier Volterra representation
• 8.3.2 Multicarrier Volterra filter formulation
• 8.3.3 Reduced-complexity Volterra construction
• 8.4 Powerful nonlinear countermeasures
• 8.4.1 Turbo Volterra equalization
• 8.4.2 Volterra-based data predistortion
• 8.4.3 Volterra-based successive signal predistortion
• 8.4.4 Successive data predistortion
• 8.5 OFDM-like signaling
• 8.5.1 OFDM-like transmitter
• 8.5.2 OFDM-like receiver
• 8.5.3 Successive transmitter-and receiver-based compensation
• 8.6 Conclusion
• References

Inspec keywords: 5G mobile communication; nonlinear distortion; radiofrequency power amplifiers; transponders; satellite communication; OFDM modulation; broadband networks; telecommunication signalling

Other keywords: 5G ecosystem; broadband satellite transmission; OFDM signaling; OFDM-based satellite systems; multicarrier satellites; high data rates; gateway-to-terminals; resulting nonlinear distortion minimization; SCM; satellite mass efficiency maximization; fifth-generation ecosystem; high-order constellations; nonlinear countermeasures; OFDM air interface; transponder high-power amplifier; high-order modulation; orthogonal frequency-division multiplexing signaling; 5G terrestrial systems; single-carrier modulation

Subjects: Satellite communication systems; Amplifiers; Mobile radio systems; Modulation and coding methods; Microwave circuits and devices