Comparison of SC-FDMA and HSUPA in the Return-Link of Evolved S-UMTS Architecture

Waveform design solutions for EHF broadband satellite communications

“…As far as CE multicarrier modulations are concerned, a 4-QAM constellation has been adopted with angular modulation index of 0.7 rad. According to (4), the resulting spectral efficiency is 1b/s/Hz. The multiplexing is considered also for CE-OFDM and CE-SC-FDMA, in order to exploit all the available subcarriers.…”

“…Multicarrier modulations have been originally conceived for terrestrial communications, in particular, for highly frequency selective channels. The motivation for their applicability to satellite broadband links is not straightforward and stems mainly from the need of an effective integration of terrestrial and satellite broadband systems [4]. Nevertheless, for the applicability to a "dirty RF" environment, such as the EHF channel, the modification to Constant Envelope (CE) multicarrier waveforms, which are natively more robust to nonlin-ear distortions, should be considered.…”

Analysis and assessment of the effects of phase noise in constant envelope multicarrier satellite transmissions

“…The use of multicarrier modulations in satellite communications has been extensively studied [2][3][4][5]. While OFDM is clearly advantaged against single-carrier modulations for broadband transmission over frequency-selective multipath satellite channels [2], SC-FDMA, thanks to its multipath resilience due to efficiency of FDE, has been proposed as an alternative promising solution to High-Speed Uplink Packet Access (HSUPA) for enhanced S-UMTS return channel [3]. More recently, [4] highlighted that SC-FDMA can exploit its improved resilience against frequency-selective fading in Ricean Land-Mobile Satellite (LMS) channels, and thus achieve better performance in terms of Bit Error Rate (BER) than OFDMA.…”