| EPSRC Reference: |
GR/K39578/01 |
| Title: |
SPECTRUM SHAPED QUASI-COHERENT N-CHANNEL MODEM (N>512) OR MOBILE SATELLITE COMMUNICATION |
| Principal Investigator: |
Wade, Dr J |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Communication & Electronic Eng |
| Organisation: |
University of Plymouth |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 March 1995 |
Ends: |
30 November 1998 |
Value (£): |
138,830
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| EPSRC Research Topic Classifications: |
| Digital Signal Processing |
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Summary on Grant Application Form |
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The project aims to improve the performance of n-channel FDM systems (n>512) by introducing spectrum shaping and phase tracking for each channel. This eliminates the usual guard interval and the need for differential decoding. Three new techniques are involved:1. optimisation of spectral shaping through the use of phase shifters to minimise interchannel interference (and so restore orthogonality),2. frequency offset estimation from FFT samples of QPSK carriers,3. Viterbi decoding via cross-correlation. Considerable work has already been carried out for 2. and 3., resulting in publication. The work should result in new DSP algorithms together with simulation models and real-time evaluation of a complete system. Due to the large number of channels involved and the complexity of the DSP, the prototype system is targeted at low bit rate satellite systems, e.g. INMARSAT. The ability to adapt the bandwidth/number of channels used depending upon the source is also important. Overall, the proposed system should give improved power and bandwidth efficiency.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.plym.ac.uk |