Dual Polarized Modulation and Reception for Next Generation Mobile Satellite Communications

Abstract

Abstract-This paper presents the novel application of polarized modulation (PMod) for increasing the throughput in mobile satellite transmissions. One of the major drawbacks in mobile satellite communications is the fact that the power budget is often restrictive, making it unaffordable to improve the spectral efficiency without an increment of transmitted power. By using dual polarized antennas in the transmitter and receiver, the PMod technique achieves an improvement in throughput of up to 100% with respect to existing deployments, with an increase of less than 1 dB at low E b /N 0 regime. Additionally, the proposed scheme implies minimum hardware modifications with respect to the existing dual polarized systems and does not require additional channel state information at the transmitter; thus it can be used in current deployments. Demodulation (i.e., detection and decoding) alternatives, with different processing complexity and performance, are studied. The results are validated in a typical mobile interactive scenario, the newest version of TS 102 744 standard [Broadband Global Area Network (BGAN)], which aims to provide interactive mobile satellite communications.Index Terms-Satellite communications, polarized modulation, dual polarized antennas, interactive services.

Physical Layer Security Scheme Based on Polarization Modulation and WFRFT Processing for Dual-polarized Satellite Systems

“…However, PMD only appears in the multi-carrier scenario [26], so we only considered PDL effect in this study. At the receiver side, during the k-th symbol interval, the received signal can be denoted as follows: (20) where H denotes the satellite channel impulse response matrix, B denotes the polarization selection vector, S denotes the transmit WFRFT data and n is white Gauss noise with spectral density of 0 N .…”

“…Authors in [19] analyzed the impairment to the polarization-based channel, which we refer to in this paper as the polarization-dependent loss (PDL) effect. To address this problem, we apply the spatial modulation (SM) concept to dual-polarized communications [20], where two components of the polarized signal are transmitted sequentially in two symbol periods, so that there is no mutual interference between the two orthogonally polarized components. Moreover, there is no CSI requirement at the transmitter side.…”

Advanced signal processing techniques for fixed and mobile satellite communications

“…Therefore, the equivalent SINR of the mth polarization using the Zero Forcer (ZF) receiver is expressed as γ n,m = h H n,m h n,m /σ 2 w • Polarized Modulation (PM): a single symbol is transmitted using a single polarization but the index of the used polarization is also a place for conveying bits. In the case where two polarizations are used, PMod conveys M + 1 bits (M bits of the symbol and an additional bit of the polarization state index) [21], [22]. Since a single symbol is transmitted, the received SINR is equivalent to SISO expression.…”

High throughput satellites in 5G and MIMO interference limited communications

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“…Concerning the services they provide, Fixed Satellite Services (FSS) operate at C band (3-6 GHz), whenever extreme wide coverage and/or resilience to bad weather conditions are needed. This band was the first to be used and currently FSS are moving to Ku band (12)(13)(14)(15)(16)(17)(18) GHz) and Ka band (26.5-40 GHz), mainly to provide backhauling services to terrestrial operators. Mobile Satellite Service (MSS) operate primarily in L band (1-2 GHz) and S band (2-4 GHz).…”