Design of nonuniformly spaced tapped-delay-line equalizers for sparse multipath channels
Analytical expressions that explicitly indicate the tap values and tap positions of infinite-length, T-spaced tapped-delay-line (TDL) equalizers for sparse multipath channels are derived. Simple design rules for allocating taps to finite-length, minimum mean-square error, nonuniformly spaced TDL equ...
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| Veröffentlicht in: | IEEE transactions on communications 2004-04, Vol.52 (4), p.530-535 |
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| container_title | IEEE transactions on communications |
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| creator | Lee, F.K.H. McLane, P.J. |
| description | Analytical expressions that explicitly indicate the tap values and tap positions of infinite-length, T-spaced tapped-delay-line (TDL) equalizers for sparse multipath channels are derived. Simple design rules for allocating taps to finite-length, minimum mean-square error, nonuniformly spaced TDL equalizers (NU-Es) are formulated based on the derived results. The design-rule-based methodology demonstrates a better tradeoff between accuracy and efficiency than existing tap-allocation schemes. The resultant NU-Es also achieve a lower overall computational complexity than conventional, uniformly spaced TDL equalizers (U-Es) of the same span for both directly adaptive and channel-estimate-based implementations. Moreover, a square-root raised cosine (SRRC) receive filter matched to a SRRC transmit filter is better than a matched filter when used to precede a NU-E. |
| doi_str_mv | 10.1109/TCOMM.2004.826351 |
| format | Article |
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Simple design rules for allocating taps to finite-length, minimum mean-square error, nonuniformly spaced TDL equalizers (NU-Es) are formulated based on the derived results. The design-rule-based methodology demonstrates a better tradeoff between accuracy and efficiency than existing tap-allocation schemes. The resultant NU-Es also achieve a lower overall computational complexity than conventional, uniformly spaced TDL equalizers (U-Es) of the same span for both directly adaptive and channel-estimate-based implementations. 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Simple design rules for allocating taps to finite-length, minimum mean-square error, nonuniformly spaced TDL equalizers (NU-Es) are formulated based on the derived results. The design-rule-based methodology demonstrates a better tradeoff between accuracy and efficiency than existing tap-allocation schemes. The resultant NU-Es also achieve a lower overall computational complexity than conventional, uniformly spaced TDL equalizers (U-Es) of the same span for both directly adaptive and channel-estimate-based implementations. Moreover, a square-root raised cosine (SRRC) receive filter matched to a SRRC transmit filter is better than a matched filter when used to precede a NU-E.</description><subject>Computational complexity</subject><subject>Data communication</subject><subject>Decision feedback equalizers</subject><subject>Design methodology</subject><subject>Matched filters</subject><subject>Multipath channels</subject><subject>Quadrature amplitude modulation</subject><subject>Scholarships</subject><subject>Signal design</subject><issn>0090-6778</issn><issn>1558-0857</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpd0D1PwzAQBmALgUQp_ADEEjGwpZztuHZGVD6lVl2KxGa5yYWmcpzUToby60kIEhLTLc97unsJuaYwoxTS-81ivVrNGEAyU2zOBT0hEyqEikEJeUomACnEcynVObkIYQ89BM4n5OMRQ_nporqIXO06Vxa1r-wxCo3JMI9a0zSYxzlac4xt6TDCQ2ds-YU-RD0dnA8YVZ1ty8a0uyjbGefQhktyVhgb8Op3Tsn789Nm8Rov1y9vi4dlnHEl25huDYpEpShTKFSSMswBBVJZZAxypJkUDCjnTCIHagzfCsMkzxOxTRgDxqfkbtzb-PrQYWh1VYYMrTUO6y5oppiQiiY9vP0H93XnXX-bViqBNEnlgOiIMl-H4LHQjS8r44-agh6K1j9F66FoPRbdZ27GTImIf56ltP-JfwOBCnoJ</recordid><startdate>200404</startdate><enddate>200404</enddate><creator>Lee, F.K.H.</creator><creator>McLane, P.J.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| source | IEEE Electronic Library (IEL) |
| subjects | Computational complexity Data communication Decision feedback equalizers Design methodology Matched filters Multipath channels Quadrature amplitude modulation Scholarships Signal design |
| title | Design of nonuniformly spaced tapped-delay-line equalizers for sparse multipath channels |
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