A digital DS spread-spectrum receiver with joint channel and Doppler shift estimation
A digital spread-spectrum receiver design is presented for communication over multipath channels with severe Doppler shifts. The characteristics of the underwater channel relevant to spread-spectrum system design are discussed, and a channel model for short-range communications (less than 10 km) is...
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| Veröffentlicht in: | IEEE transactions on communications 1991-08, Vol.39 (8), p.1255-1267 |
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| container_title | IEEE transactions on communications |
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| creator | Iltis, R.A. Fuxjaeger, A.W. |
| description | A digital spread-spectrum receiver design is presented for communication over multipath channels with severe Doppler shifts. The characteristics of the underwater channel relevant to spread-spectrum system design are discussed, and a channel model for short-range communications (less than 10 km) is defined. The receiver considered uses a digital coherent RAKE combiner, coupled with an extended Kalman filter (EKF)-based estimator for channel parameters and pseudonoise code delay. Receiver performance is evaluated by computing average bit-error rate (BER) versus iterations of the EKF joint estimator, using both fixed and time-varying channels. It is shown that the BER obtained using the EKF joint estimator closely tracks the optimum BER obtained when the channel, delay, and Doppler parameters are known exactly. Finally, the Cramer-Rao lower bound for time-invariant joint channel, delay, and Doppler estimation is derived, and compared with the ensemble averaged mean-squared error of the EKF estimator.< > |
| doi_str_mv | 10.1109/26.134015 |
| format | Article |
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The characteristics of the underwater channel relevant to spread-spectrum system design are discussed, and a channel model for short-range communications (less than 10 km) is defined. The receiver considered uses a digital coherent RAKE combiner, coupled with an extended Kalman filter (EKF)-based estimator for channel parameters and pseudonoise code delay. Receiver performance is evaluated by computing average bit-error rate (BER) versus iterations of the EKF joint estimator, using both fixed and time-varying channels. It is shown that the BER obtained using the EKF joint estimator closely tracks the optimum BER obtained when the channel, delay, and Doppler parameters are known exactly. Finally, the Cramer-Rao lower bound for time-invariant joint channel, delay, and Doppler estimation is derived, and compared with the ensemble averaged mean-squared error of the EKF estimator.< ></description><identifier>ISSN: 0090-6778</identifier><identifier>EISSN: 1558-0857</identifier><identifier>DOI: 10.1109/26.134015</identifier><identifier>CODEN: IECMBT</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Acoustics ; Bandwidth ; Bit error rate ; Delay estimation ; Doppler shift ; Exact sciences and technology ; Fading ; Frequency ; Fundamental areas of phenomenology (including applications) ; Mobile communication ; Physics ; RAKE receivers ; Spread spectrum communication ; Underwater acoustics ; Underwater sound</subject><ispartof>IEEE transactions on communications, 1991-08, Vol.39 (8), p.1255-1267</ispartof><rights>1992 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c337t-31fb38d5ad25cdc01ebb32b7d5b7eb5514e263851774147c56ffcda3596d6b6a3</citedby><cites>FETCH-LOGICAL-c337t-31fb38d5ad25cdc01ebb32b7d5b7eb5514e263851774147c56ffcda3596d6b6a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/134015$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27923,27924,54757</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/134015$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4998807$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Iltis, R.A.</creatorcontrib><creatorcontrib>Fuxjaeger, A.W.</creatorcontrib><title>A digital DS spread-spectrum receiver with joint channel and Doppler shift estimation</title><title>IEEE transactions on communications</title><addtitle>TCOMM</addtitle><description>A digital spread-spectrum receiver design is presented for communication over multipath channels with severe Doppler shifts. The characteristics of the underwater channel relevant to spread-spectrum system design are discussed, and a channel model for short-range communications (less than 10 km) is defined. The receiver considered uses a digital coherent RAKE combiner, coupled with an extended Kalman filter (EKF)-based estimator for channel parameters and pseudonoise code delay. Receiver performance is evaluated by computing average bit-error rate (BER) versus iterations of the EKF joint estimator, using both fixed and time-varying channels. It is shown that the BER obtained using the EKF joint estimator closely tracks the optimum BER obtained when the channel, delay, and Doppler parameters are known exactly. Finally, the Cramer-Rao lower bound for time-invariant joint channel, delay, and Doppler estimation is derived, and compared with the ensemble averaged mean-squared error of the EKF estimator.< ></description><subject>Acoustics</subject><subject>Bandwidth</subject><subject>Bit error rate</subject><subject>Delay estimation</subject><subject>Doppler shift</subject><subject>Exact sciences and technology</subject><subject>Fading</subject><subject>Frequency</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Mobile communication</subject><subject>Physics</subject><subject>RAKE receivers</subject><subject>Spread spectrum communication</subject><subject>Underwater acoustics</subject><subject>Underwater sound</subject><issn>0090-6778</issn><issn>1558-0857</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1991</creationdate><recordtype>article</recordtype><recordid>eNqFkDtPwzAURi0EEuUxsDJ5QEgMKXb8zFi1vKRKDNA5cuwb6ipNgu2C-PekCoKR6Q73fOfqfghdUDKllBS3uZxSxgkVB2hChdAZ0UIdogkhBcmkUvoYncS4IYRwwtgErWbY-TefTIMXLzj2AYzLYg82hd0WB7DgPyDgT5_WeNP5NmG7Nm0LDTatw4uu75thHde-Thhi8luTfNeeoaPaNBHOf-YpWt3fvc4fs-Xzw9N8tswsYypljNYV004YlwvrLKFQVSyvlBOVgkoIyiGXTAuqFKdcWSHr2jrDRCGdrKRhp-h69Pahe98N98utjxaaxrTQ7WKZ65xzItj_oKAyZ1wN4M0I2tDFGKAu-zA8Fb5KSsp9w2Uuy7Hhgb36kZpoTVMH01offwO8KLQme-XliHkA-NONjm_XMoKR</recordid><startdate>19910801</startdate><enddate>19910801</enddate><creator>Iltis, R.A.</creator><creator>Fuxjaeger, A.W.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SC</scope><scope>7SP</scope><scope>8FD</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope></search><sort><creationdate>19910801</creationdate><title>A digital DS spread-spectrum receiver with joint channel and Doppler shift estimation</title><author>Iltis, R.A. ; Fuxjaeger, A.W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-31fb38d5ad25cdc01ebb32b7d5b7eb5514e263851774147c56ffcda3596d6b6a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1991</creationdate><topic>Acoustics</topic><topic>Bandwidth</topic><topic>Bit error rate</topic><topic>Delay estimation</topic><topic>Doppler shift</topic><topic>Exact sciences and technology</topic><topic>Fading</topic><topic>Frequency</topic><topic>Fundamental areas of phenomenology (including applications)</topic><topic>Mobile communication</topic><topic>Physics</topic><topic>RAKE receivers</topic><topic>Spread spectrum communication</topic><topic>Underwater acoustics</topic><topic>Underwater sound</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Iltis, R.A.</creatorcontrib><creatorcontrib>Fuxjaeger, A.W.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Computer and Information Systems Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><jtitle>IEEE transactions on communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Iltis, R.A.</au><au>Fuxjaeger, A.W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A digital DS spread-spectrum receiver with joint channel and Doppler shift estimation</atitle><jtitle>IEEE transactions on communications</jtitle><stitle>TCOMM</stitle><date>1991-08-01</date><risdate>1991</risdate><volume>39</volume><issue>8</issue><spage>1255</spage><epage>1267</epage><pages>1255-1267</pages><issn>0090-6778</issn><eissn>1558-0857</eissn><coden>IECMBT</coden><abstract>A digital spread-spectrum receiver design is presented for communication over multipath channels with severe Doppler shifts. The characteristics of the underwater channel relevant to spread-spectrum system design are discussed, and a channel model for short-range communications (less than 10 km) is defined. The receiver considered uses a digital coherent RAKE combiner, coupled with an extended Kalman filter (EKF)-based estimator for channel parameters and pseudonoise code delay. Receiver performance is evaluated by computing average bit-error rate (BER) versus iterations of the EKF joint estimator, using both fixed and time-varying channels. It is shown that the BER obtained using the EKF joint estimator closely tracks the optimum BER obtained when the channel, delay, and Doppler parameters are known exactly. Finally, the Cramer-Rao lower bound for time-invariant joint channel, delay, and Doppler estimation is derived, and compared with the ensemble averaged mean-squared error of the EKF estimator.< ></abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/26.134015</doi><tpages>13</tpages></addata></record> |
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| identifier | ISSN: 0090-6778 |
| ispartof | IEEE transactions on communications, 1991-08, Vol.39 (8), p.1255-1267 |
| issn | 0090-6778 1558-0857 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Acoustics Bandwidth Bit error rate Delay estimation Doppler shift Exact sciences and technology Fading Frequency Fundamental areas of phenomenology (including applications) Mobile communication Physics RAKE receivers Spread spectrum communication Underwater acoustics Underwater sound |
| title | A digital DS spread-spectrum receiver with joint channel and Doppler shift estimation |
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