Comparative study of pilot symbol assisted modem schemes
Comparative study of pilot symbol assisted modem schemes
The performance of a range of 1, 2 and 4 bit/symbol pilot symbol assisted modulation (PSAM) [1, 3] arrangements employing first-order linear, low pass, polynomial and optimum higher-order linear interpolation schemes is analysed in contrast to that of the equivalent non-coherent modems. Both the non-coherent modems as well as the coherent PSAM schemes exhibited a residual bit error rate (BER), but the best compromise in terms of performance, system delay and complexity was attributable to the first-order linear interpolator. In case of short interpolation buffers the polynomial interpolator slightly outperformed the low-pass and the higher-order linear optimum interpolators, but this advantage eroded in case of longer buffers. The higher complexity of the minimum mean squared error interpolator is not justifiable in terms of performance improvements. The low-complexity linearly interpolated PSAM schemes have a n improved performance in comparison to the differential schemes in case of higher order constellations, such as 4- and 16-level quadrature amplitude modulation.
36-41
Torrance, J.
a9eaed51-f0f7-448a-9ad8-f563cf6afc1b
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
September 1995
Torrance, J.
a9eaed51-f0f7-448a-9ad8-f563cf6afc1b
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Torrance, J. and Hanzo, L.
(1995)
Comparative study of pilot symbol assisted modem schemes.
IEE RRAS'95, , Bath, United Kingdom.
26 - 28 Sep 1995.
.
(doi:10.1049/cp:19951113).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The performance of a range of 1, 2 and 4 bit/symbol pilot symbol assisted modulation (PSAM) [1, 3] arrangements employing first-order linear, low pass, polynomial and optimum higher-order linear interpolation schemes is analysed in contrast to that of the equivalent non-coherent modems. Both the non-coherent modems as well as the coherent PSAM schemes exhibited a residual bit error rate (BER), but the best compromise in terms of performance, system delay and complexity was attributable to the first-order linear interpolator. In case of short interpolation buffers the polynomial interpolator slightly outperformed the low-pass and the higher-order linear optimum interpolators, but this advantage eroded in case of longer buffers. The higher complexity of the minimum mean squared error interpolator is not justifiable in terms of performance improvements. The low-complexity linearly interpolated PSAM schemes have a n improved performance in comparison to the differential schemes in case of higher order constellations, such as 4- and 16-level quadrature amplitude modulation.
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jmt-lh-rrac-1995.pdf
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Published date: September 1995
Additional Information:
Conf. Public. No. 415
Venue - Dates:
IEE RRAS'95, , Bath, United Kingdom, 1995-09-26 - 1995-09-28
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 258132
URI: http://eprints.soton.ac.uk/id/eprint/258132
PURE UUID: 8d7d7452-14d3-441e-90dd-bbc8e042cbbb
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Date deposited: 30 Jul 2003
Last modified: 18 Mar 2024 02:33
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Author:
J. Torrance
Author:
L. Hanzo
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