| EPSRC Reference: |
GR/K85360/01 |
| Title: |
NONLINEAR RECEIVERS FOR DIRECT SEQUENCE CODE DIVISION MULTIPLE ACCESS |
| Principal Investigator: |
Cruickshank, Dr D |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Sch of Engineering |
| Organisation: |
University of Edinburgh |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 1996 |
Ends: |
31 August 1998 |
Value (£): |
105,911
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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Summary on Grant Application Form |
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This project will examine two main receiver types for direct sequence ODMA with a view to achieving the objectives described above. Radial Basic Function based receivers have been shown to provide good performance for DS-ODMA, however they are computationally complex and difficult and slow to train compared with other adaptive algorithms. In this project we shall investigate methods of reducing the computational complexity using decision feedback to reduce the number of centres and discarding centres which have little influence on the non-linear decision boundary. We shall also look at using a-prior knowledge of the codes and an estimate of the channel impulse response to calculate centre positions, greatly reducing training time. The second type of receivers we shall examine are Volterra filters. Volterra filters do not have the direct relationship with probability of error that RBF receivers have. However, they may approximate the decision boundary of the RBF closely enough to achieve good performance and training using conventional adaptive algorithms is possible. Order selection and sparse Volterra filters will be investigated with a view to reducing the computational load.
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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.ed.ac.uk |