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The ESA MUSIC Project The ESA MUSIC Project Multi-User & Interference Cancellation - ESA/ESTEC Contract 13095/98/NL/SB Advanced Mobile Satellite Systems.

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Presentation on theme: "The ESA MUSIC Project The ESA MUSIC Project Multi-User & Interference Cancellation - ESA/ESTEC Contract 13095/98/NL/SB Advanced Mobile Satellite Systems."— Presentation transcript:

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2 The ESA MUSIC Project The ESA MUSIC Project Multi-User & Interference Cancellation - ESA/ESTEC Contract 13095/98/NL/SB Advanced Mobile Satellite Systems & Technologies presentation days ESA./ESTEC – November 2000

3 AMSST Presentation Days – November 2000 The MUSIC Project: Mission The MUSIC experiment (Multi-USer Interference Cancellation receiver) is a research project supported by the European Space Agency which is aimed at the validation of an Adaptive Interference Mitigating Detector suited for use in a CDMA-based mobile satellite network

4 AMSST Presentation Days – November 2000 The MUSIC experiment (Multi-USer Interference Cancellation receiver) is a research project supported by the European Space Agency which is aimed at the validation of an Adaptive Interference Mitigating Detector suited for use in a CDMA-based mobile satellite network The MUSIC Project: Mission

5 AMSST Presentation Days – November 2000 MUSIC Breadboard Setup Noise Generator Oscilloscope Spectrum Analyzer GPIB NoiseCom UFX 7107 HP E4411B MUSIC Receiver Serial Port STM Proteo Board + STM/CPR EC-BAID ASIC AWG PC Slot National Instr. PCI 5411

6 AMSST Presentation Days – November 2000 Presentation Outline Overall System Description and Architectural IssuesOverall System Description and Architectural Issues (M. Luise, CPR) Design of DSP HW and Analog TX/RX endsDesign of DSP HW and Analog TX/RX ends (G. Colleoni, STM) Breadboard HW partitioning and ASIC Design (L. Fanucci, CPR)Breadboard HW partitioning and ASIC Design (L. Fanucci, CPR)

7 AMSST Presentation Days – November 2000 Technical Specs Tables: MUSIC TX 1/2

8 AMSST Presentation Days – November 2000 Technical Specs Tables: MUSIC TX 2/2 As output from WP200

9 AMSST Presentation Days – November 2000 Technical Specs Tables: MUSIC RX 1/2

10 AMSST Presentation Days – November 2000 Technical Specs Tables: MUSIC RX 2/2 As output from WP200 < <

11 AMSST Presentation Days – November 2000 Noise Generator Oscilloscope Spectrum Analyzer GPIB MUSIC Receiver Serial Port AWG DAQ Board Breadboard Control and Monitoring via LabVIEW

12 AMSST Presentation Days – November 2000 Breadboard Control and Monitoring via LabVIEW Noise Generator Oscilloscope Spectrum Analyzer GPIB MUSIC Receiver Serial Port AWG DAQ Board

13 AMSST Presentation Days – November 2000 A Corner of the MUSIC Lab in Pisa

14 AMSST Presentation Days – November 2000 The MUSIC TX: SW Setup …

15 AMSST Presentation Days – November 2000 The MUSIC TX: SW Setup …

16 AMSST Presentation Days – November 2000 … SW CDMA Signal Generation... AWG PC Slot

17 AMSST Presentation Days – November 2000 … AWG Loading and Run AWG PC Slot

18 AMSST Presentation Days – November 2000 Sat Channel Emulation: Noise Generation LabView Virtual Instrument NOISECOM UFX 7107 MUSIC Testing Overall Set-up

19 AMSST Presentation Days – November 2000 The MUSIC TX/RX: Analog IF front-end More in the presentation to follow… by G. Colleoni, STMicroelectronics

20 AMSST Presentation Days – November 2000 MUSIC RX: Direct IF sampling Digital downconversion to baseband Spectrum after A/D conversion

21 AMSST Presentation Days – November 2000 The PROTEO Signal Processing Board

22 AMSST Presentation Days – November 2000 The PROTEO Signal Processing Board

23 AMSST Presentation Days – November 2000 MUSIC RX Architecture More on HW partitioning to follow… by L. Fanucci, CPR-Team More on HW partitioning to follow… by L. Fanucci, CPR-Team

24 AMSST Presentation Days – November 2000 The Digital Multi-Rate Front-End 1/2 Downconverting to Baseband via a DCO f IFD BB

25 AMSST Presentation Days – November 2000 The Digital Multi-Rate Front-End 2/2 Cascaded Integrator-Comb (CIC) Filter A low-complexity solution to perform low-pass filtering and decimation with no noise spectrum aliasing

26 AMSST Presentation Days – November 2000 Ancillary Receiver Functions MONITORING AND MEASUREMENT Signal-to-noise plus interference ratio Bit error rate Chip Timing & Carrier Loop Lock SYNCHRONIZATION Timing Spreading code acquisition Chip clock tracking Carrier Carrier frequency tracking Carrier phase recovery DETECTION Signal Interpolation Signal sense

27 AMSST Presentation Days – November 2000 Code Timing Acquisition Unit (CTAU) Correlation Time: L symbol intervals

28 AMSST Presentation Days – November 2000 Performance of CTAU with Different Kind of Pilots

29 AMSST Presentation Days – November 2000 Linear Interpolation Unit (LIU) l m =integer delay, m =fractional delay T d = T c /4

30 AMSST Presentation Days – November 2000 Chip Clock Tracking Unit (CCTU)

31 AMSST Presentation Days – November 2000 Chip-timing Error Detector (CED) Non-coherent, non decision-aided processing – Lock detector not shown

32 AMSST Presentation Days – November 2000 Automatic Frequency Control Unit (AFCU) Frequency Error Detector (FED)

33 AMSST Presentation Days – November 2000 Carrier Phase Recovery Unit (CPRU) (embedded with EC-BAID) Decision-Aided at EC-BAID output !

34 AMSST Presentation Days – November 2000 The MUSIC core: The EC-BAID 1/2 EC-BAID: Extended Complex-valued Blind Adaptive Interference- mitigating Detector is a baseband single-channel digital detector to counteract multiple- access interference E F. Giannetti. R. De Gaudenzi, M. Luise: "Design of a Low-Complexity Adaptive Interference-Rejection Detector for DS/SS Receivers in CDMA Radio Networks", IEEE Trans. Commun, vol. COM-46 n. 1, Jan 1998.

35 AMSST Presentation Days – November 2000 The MUSIC core: The EC-BAID 2/2 CMF outputs array Symbol-Rate Detector Output The C-BAID is a linear adaptive detector with complex-valued coefficients h 1 (m), m=0,1,...,L-1 Recursive Adaptation Rule h 1 c 1 x 1, Canonical Decomposition

36 AMSST Presentation Days – November 2000 Features of the EC-BAID Blind Blind : no need for training sequences to aid algorithm convergence, nor knowledge of interferers' parameters Robust to asynchronous MAI Robust to asynchronous MAI even for large interferer-to-useful channel power ratios Insensitive to the unknown phase Insensitive to the unknown phase of the useful signal and compatible with conventional QPSK phase estimators Robust to residual carrier frequency errors Robust to residual carrier frequency errors with respect to conventional DA-MMSE Insensitive Insensitive to carrier frequency offsets on the interfering signals Suited to low-power ASIC Suited to low-power ASIC implementation on a low-cost user terminal. J. Romero-Garcia, F. Giannetti. R. De Gaudenzi, M. Luise: A Frequency Error Resistant Blind CDMA Detector", IEEE Trans. Commun., July 2000

37 AMSST Presentation Days – November 2000 Interference-Mitigation Capability of EC-BAID Spreading Factor L=64 WH+E-PN Codes 1 User + 18 Interferers 6 dB STRONGER than the useful channel each. (C/I) sc =-6 dB

38 AMSST Presentation Days – November 2000 The EC-BAID ASIC with Embedded CPRU 1/2

39 AMSST Presentation Days – November 2000 The EC-BAID ASIC with Embedded CPRU 2/ m Technology R. De Gaudenzi, E. Letta, L. Fanucci, F. Giannetti, M. Luise: "VLSI Implementation of a CDMA Blind Interference- Mitigating Detector", to appear on the IEEE Jou. Sel. Areas Commun More on ASIC Design to follow… by L. Fanucci, CPR-Team More on ASIC Design to follow… by L. Fanucci, CPR-Team STM & TEAM EC-BAID

40 AMSST Presentation Days – November 2000 Some Results: Bit-True Simulations 1/2

41 AMSST Presentation Days – November 2000 Some Results: Bit-True Simulations 2/2

42 AMSST Presentation Days – November MHz IF CDMA Signal + Noise Chip Rate= Mchip/s L=64, Bit-rate=64 kb/s Data+Pilot Channel Chip Rate= Mchip/s L=64, Bit-rate=64 kb/s Data+Pilot Channel

43 AMSST Presentation Days – November 2000 BB Filtered/Interpolated Digital CDMA Signal

44 AMSST Presentation Days – November 2000 The Double-PROTEO Config with EC-BAID on FPGA

45 AMSST Presentation Days – November 2000 Current Status and Further Development Steps EC-BAID FPGA Implementation finalized ASIC layout finalized Final Receiver BER Testing Started ASIC foundry run scheduled ASIC Integration and Testing planned Soon to be ended...

46 AMSST Presentation Days – November 2000 CIC Equalization

47 AMSST Presentation Days – November 2000 Signal Decimation with the CIC Filter 1/2 =decimation factor

48 AMSST Presentation Days – November 2000 Signal Decimation with the CIC Filter 2/2 Thats How the CIC Works

49 AMSST Presentation Days – November 2000 AWG Aperture Equalizer

50 AMSST Presentation Days – November 2000 f IFD Local Oscillator Mixer AWG To: Noise Generation & Combining Signal+MAI IF Filter f LO f IF … more in the detailed presentation TX/RX Filtering

51 AMSST Presentation Days – November 2000 HW Partitioning of RX Functions

52 AMSST Presentation Days – November 2000 Bit-True Design Sample (Hierarchical Diagram) CCTU

53 AMSST Presentation Days – November 2000 CCTU Lock Detector Low-pass Filtering Nonlinearity Threshold with Hysteresis

54 AMSST Presentation Days – November 2000 The EC-BAID Long-term BER Dirft

55 AMSST Presentation Days – November 2000 Adaptive EC-BAID with Leakage Standard EC-BAID Leakage factor EC-BAID with Leakage

56 AMSST Presentation Days – November 2000 Leak Factor Optimization

57 AMSST Presentation Days – November 2000 Optimization of the EC-BAID: Window Length Optimum Length: 2 symbol intervals ( )

58 AMSST Presentation Days – November 2000 EC-BAID Functional Block Diagram 1/2

59 AMSST Presentation Days – November 2000 EC-BAID Functional Block Diagram 2/2


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