S-UMTS Processor Key Technologies demonstrator

Topping, C.; Bishop, Alexander W.; Craig, Tom; Howe, D.; Hamer, J.; Angeletti, Piero; Senior, Alan

doi:10.1109/spsc.2008.4686718

Cited by 2 publications

(2 citation statements)

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“…For non rectangular placement of the radiating elements and/or beams, more complex theoretical frameworks must be re-called as those relevant to the Multi-Dimensional FFT (MD-FFT) [30]. Techniques based on MD-FFTs for planar lattices are particularly well suited for periodic arrays and have been implemented, tested and validated in a real-time proof-ofconcept demonstrator [38] for arrays with number of beams to be generated equal to the number of antenna elements. In the present case, the high overlapping of the beams requires an oversizing of the MD-FFT and FFT input pruning, zero padding or Reconfigurable-MD-FFT architectures [42] can offer further advantages in terms of complexity reduction when there is a large unbalance in the numbers N B , N F B , N F T and N T .…”

Section: A Pragmatic M-mimo Payload Designmentioning

confidence: 99%

A Pragmatic Approach to Massive MIMO for Broadband Communication Satellites

Angeletti

Gaudenzi

2020

IEEE Access

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In this paper, we analyze the performance of Massive Multiple Input Multiple Output (M-MIMO) techniques aiming at increasing the throughput of broadband satellites. In particular, we investigate a "pragmatic" approach to the design of the M-MIMO to ease its implementation both at system and satellite payload level. We compare the performance of optimized classical Minimum Mean Square Error (MMSE), Zero Forcing (ZF), Matched Filter (MF) schemes with the proposed "pragmatic" M-MIMO one dubbed fixed Multi-Beam (MB). To further boost the M-MIMO performance, a novel radio resource management approach based on Mixed Integer Quadratic Programming (MIQDP-RRM) is proposed. The adoption of MIQDP-RRM is shown to greatly enhance the M-MIMO throughput performance. It is shown that the MB scheme closely approximate the MF, ZF and MMSE performance with a much simpler active antenna-based payload architecture and without requiring any user channel estimation. The MB MIQDP-RRM M-MIMO pragmatic solution allows to achieve higher satellite broadband throughput compared to a conventional four colors frequency reuse scheme (CFR) with affordable complexity for both space and ground segments. At the same time we show that by non-conventional CFR multi-beam array design, the performance gap compared to MB MIQDP-RRM M-MIMO can be significantly reduced.

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Section: A Pragmatic M-mimo Payload Designmentioning

confidence: 99%

A Pragmatic Approach to Massive MIMO for Broadband Communication Satellites

Angeletti

Gaudenzi

2020

IEEE Access

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“…DBF techniques based on Fast-Fourier-Transforms (FFTs) on planar lattices 11 are particularly well suited for periodic active arrays and have been recently implemented, tested and validated in real-time proof-of-concept demonstrators 12 (Figure 7 reports some test results). …”

Section: Analog and Digital Butler Matricesmentioning

confidence: 99%