Spectrally efficient mobile satellite real-time broadcast with transmit diversity

Multi-Satellite MIMO Communications at Ku-Band and Above: Investigations on Spatial Multiplexing for Capacity Improvement and Selection Diversity for Interference Mitigation

“…The objective of this paper is in line with some other recent research efforts [4][5][6][7][8][12][13][14][15][16] casting further light in this regard. These studies have been mainly concerned with the possible diversity sources that can be exploited in satellite communications to form a MIMO matrix channel.…”

“…Based on the channel model assumed, their interrelationship is defined through ( 6) by simply substituting the SNR CSi by SIR * i . Extending the transformation given in (8) to include also the interfering link S 3 -TS (i.e., for i = 1, 2, 3) and making the channel modeling assumptions, the probabilities P i (i = 1, 2) encountered in (18) after some straightforward algebra are evaluated, that is,…”

“…Considering the transformation given in (8), relating the lognormal rain attenuation RVs A Ri (i = 1, 2) to the normalized normal RVs u i (i = 1, 2), and the channel modeling assumptions, p avail is expressed as…”

“…(ii) Satellite (or orbital) diversity, where multiple satellites, sufficiently separated in orbit to provide (ideally) independently fading channels, communicate with a single TS equipped with either multiple antennas or even a single multiple-input antenna. So far, it has been studied mostly as an efficient rain fade mitigation technique in Ku-, Ka-, and Q/Vband satellite communications [3] and, also, recently, as a candidate to form satellite MIMO matrix channels at high (i.e., Ku, Ka, and Q/V) [4,5] as well as at low frequency bands, such as L (1/2 GHz) and S (2/4 GHz) [6][7][8]. Also, it is worthwhile noting that it is already successfully employed in the continental US digital audio radio services (DARS), mobile systems, Sirius and XM satellite radio, operating at the S-band [9].…”