| EPSRC Reference: |
GR/J52099/01 |
| Title: |
ADVANCED MODULATION AND CHANNEL CODING TECHNIQUES FOR FUTURE CELLULAR MOBILE SYSTEM |
| Principal Investigator: |
Aghvami, Professor AH |
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| Department: |
Electronic Engineering |
| Organisation: |
Kings College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
28 March 1994 |
Ends: |
27 March 1997 |
Value (£): |
127,572
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Summary on Grant Application Form |
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a) To investigate advanced modulation and channel coding techniques for future digital mobile system.b) To compare the performance of various mobile channel protection techniques.c) To investigate the operation and performance of a new variable data demodulator.Progress:Since the beginning of this project, 16-QAM and 16-PSK modulation simulators have been built up for future digital mobile systems. Then, the performance of various mobile channel protection techniques has been investigated. For equalisation, a maximum likelihood sequence estimator(MLSE) is too complex to be practical for unknown mobile radio channels with severe intersymbol interference(ISI). Instead, a new reduced-state soft decision feedback Viterbi equalizer(RSSDFVE) has been proposed and also a modified Reduced State Sequence estimator(RSSE) with a channel estimator and predictor has been investigated for high modulations. Two profile Rayleigh fading channel models with a Doppler frequency shift are used in the simulation. In order to update the RSSDFVE and RSSE to track the changes of fading channels, different channel estimation techniques have been investigated. The simulation results are compared with a Recursive Least Square(RLS) Decision Feedback Equalizer(DFE) and a Maximum Likelihood Sequence Estimator(MLSE). The performance of interleaving, slow frequency hopping and diversity is under investigation. Publications[1] A New Adaptive Equalizer with a Channel Estimator for Mobile Radio Communications , (to be published in Conference Record of ICC'95, Seattle U.S.A.). [2] Performance Evaluation of RSSE for Mobile Communications , (submitted to Electronics Letters). [3] A Reduced-state Soft Decision feedback Viterbi Equalizer for Mobile Radio Communications , Conference Record of 1994 IEEE 44th Vehicular Technology Conference, Stockholm, pp.234-238. [4] Performance Evaluation of Decision Feedback Equalisation Using Measured Indoor Radio Channels , Conference Record of PIMRC '94, The Netherlands, PP.650-654.
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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 |
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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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