{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/29443"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/29443","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Feedback schemes in angular domain processing for MIMO antenna systems","abstract":"Multiple transmit and multiple receive antenna (MIMO) systems provide an additional spatial dimension that yields a degree of freedom gain. The degree of freedom gain in MIMO systems allows for spatial multiplexing of multiple data streams onto the channel and an increase in the channel’s capacity or improved reliability against multipath fading. An MIMO antenna system with Nt transmit antennas and Nr receive antennas, under suitable fading conditions will yield a min(Nt,Nr) degree of freedom gain. This min(Nt,Nr) degree of freedom gain can be employed by spatial multiplexing multiple data streams to increase the channel’s capacity by a factor of min(Nt,Nr). In addition, the transmit signal at the transmit antenna array can be aligned in the direction of the transmit antenna array pattern so that the received signals add constructively at the receive antenna array. This transmit beamforming will provide a power gain in addition to the MIMO degree of freedom gain. However, in order to do transmit beamforming, the transmit antenna array must have knowledge of the channel’s state. Channel feedback in the conventional statistical MIMO channel is burdensome, due to the need to feed back information on each of the NrNt channel coefficients. The angular domain provides a much more natural, compact representation of the MIMO wireless channel than does the conventional model. In the angular domain, the transmit and receive arrays are divided into Nt and Nr respective resolvable angles, and the angular domain channel model examines the channel between the transmit and receive angular cells. The angular domain approach takes advantage of the physical nature of the wireless channel and produces a sparse channel matrix, unlike the previous conventional statistical model. As a result, less information will need to be fed back to the transmitter. This thesis applies array processing techniques to the MIMO wireless channel modeled in the angular domain to demonstrate the reduced computation complexity and feedback rate of angular domain processing.","abstract_html":"Multiple transmit and multiple receive antenna (MIMO) systems provide an additional spatial dimension that yields a degree of freedom gain. The degree of freedom gain in MIMO systems allows for spatial multiplexing of multiple data streams onto the channel and an increase in the channel’s capacity or improved reliability against multipath fading. An MIMO antenna system with Nt transmit antennas and Nr receive antennas, under suitable fading conditions will yield a min(Nt,Nr) degree of freedom gain. This min(Nt,Nr) degree of freedom gain can be employed by spatial multiplexing multiple data streams to increase the channel’s capacity by a factor of min(Nt,Nr). In addition, the transmit signal at the transmit antenna array can be aligned in the direction of the transmit antenna array pattern so that the received signals add constructively at the receive antenna array. This transmit beamforming will provide a power gain in addition to the MIMO degree of freedom gain. However, in order to do transmit beamforming, the transmit antenna array must have knowledge of the channel’s state. Channel feedback in the conventional statistical MIMO channel is burdensome, due to the need to feed back information on each of the NrNt channel coefficients. The angular domain provides a much more natural, compact representation of the MIMO wireless channel than does the conventional model. In the angular domain, the transmit and receive arrays are divided into Nt and Nr respective resolvable angles, and the angular domain channel model examines the channel between the transmit and receive angular cells. The angular domain approach takes advantage of the physical nature of the wireless channel and produces a sparse channel matrix, unlike the previous conventional statistical model. As a result, less information will need to be fed back to the transmitter. This thesis applies array processing techniques to the MIMO wireless channel modeled in the angular domain to demonstrate the reduced computation complexity and feedback rate of angular domain processing.","abstract_has_math":false,"creators":["Bunge, Brian"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Poon, Ada S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-02-01T00:46:39Z","date_published":"2012-02-01T00:46:39Z","updated_at":"2026-07-22T22:25:27Z","subjects":["multiple receive antenna (MIMO)","Angular Domain","Feedback","Wireless"],"languages":["en"],"rights":["Copyright 2011 Brian Bunge"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/29443","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Poon, Ada S."]},{"key":"dc:creator","label":"Author","values":["Bunge, Brian"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-02-01T00:46:39Z","2014-02-01T11:00:27Z","2011-12"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["multiple receive antenna (MIMO)","Angular Domain","Feedback","Wireless"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2011 Brian Bunge"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/29443"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Multiple transmit and multiple receive antenna (MIMO) systems provide an additional spatial dimension that yields a degree of freedom gain. The degree of freedom gain in MIMO systems allows for spatial multiplexing of multiple data streams onto the channel and an increase in the channel’s capacity or improved reliability against multipath fading. An MIMO antenna system with Nt transmit antennas and Nr receive antennas, under suitable fading conditions will yield a min(Nt,Nr) degree of freedom gain. This min(Nt,Nr) degree of freedom gain can be employed by spatial multiplexing multiple data streams to increase the channel’s capacity by a factor of min(Nt,Nr). In addition, the transmit signal at the transmit antenna array can be aligned in the direction of the transmit antenna array pattern so that the received signals add constructively at the receive antenna array. This transmit beamforming will provide a power gain in addition to the MIMO degree of freedom gain. However, in order to do transmit beamforming, the transmit antenna array must have knowledge of the channel’s state. Channel feedback in the conventional statistical MIMO channel is burdensome, due to the need to feed back information on each of the NrNt channel coefficients. The angular domain provides a much more natural, compact representation of the MIMO wireless channel than does the conventional model. In the angular domain, the transmit and receive arrays are divided into Nt and Nr respective resolvable angles, and the angular domain channel model examines the channel between the transmit and receive angular cells. The angular domain approach takes advantage of the physical nature of the wireless channel and produces a sparse channel matrix, unlike the previous conventional statistical model. As a result, less information will need to be fed back to the transmitter. This thesis applies array processing techniques to the MIMO wireless channel modeled in the angular domain to demonstrate the reduced computation complexity and feedback rate of angular domain processing.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-12-02T21:45:20Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Bunge_Brian.docx: 194253 bytes, checksum: c9aa8808e5fae8d547c7994f1cecca8b (MD5) Bunge_Brian.pdf: 928297 bytes, checksum: c918da24528483a86904abafe0335f9d (MD5)","Made available in DSpace on 2012-02-01T00:46:39Z (GMT). No. of bitstreams: 3 Bunge_Brian.pdf: 928297 bytes, checksum: c918da24528483a86904abafe0335f9d (MD5) license.txt: 4057 bytes, checksum: afffa67e8e37047978fd37735e02253d (MD5) Bunge_Brian.docx: 194253 bytes, checksum: c9aa8808e5fae8d547c7994f1cecca8b (MD5)","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by William Ingram (wingram2@illinois.edu) on 2012-02-01T00:50:23Z Item is restricted until 2014-02-01T00:50:07Z","Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:27Z Item was in collections: Graduate Theses and Dissertations at Illinois (ID: 204) Dissertations and Theses - Electrical and Computer Engineering (ID: 446) No. of bitstreams: 4 Bunge_Brian.pdf.txt: 65528 bytes, checksum: 9094fc3d8f068cf4545d379431f3fce6 (MD5) Bunge_Brian.pdf: 928297 bytes, checksum: c918da24528483a86904abafe0335f9d (MD5) license.txt: 4057 bytes, checksum: afffa67e8e37047978fd37735e02253d (MD5) Bunge_Brian.docx: 194253 bytes, checksum: c9aa8808e5fae8d547c7994f1cecca8b (MD5)","Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:27Z"]},{"key":"dc:title","label":"Title","values":["Feedback schemes in angular domain processing for MIMO antenna systems"]}]}],"canonical_facts":{"dc:contributor":["Poon, Ada S."],"dc:creator":["Bunge, Brian"],"dc:date":["2012-02-01T00:46:39Z","2014-02-01T11:00:27Z","2011-12"],"dc:description":["Multiple transmit and multiple receive antenna (MIMO) systems provide an additional spatial dimension that yields a degree of freedom gain. The degree of freedom gain in MIMO systems allows for spatial multiplexing of multiple data streams onto the channel and an increase in the channel’s capacity or improved reliability against multipath fading. An MIMO antenna system with Nt transmit antennas and Nr receive antennas, under suitable fading conditions will yield a min(Nt,Nr) degree of freedom gain. This min(Nt,Nr) degree of freedom gain can be employed by spatial multiplexing multiple data streams to increase the channel’s capacity by a factor of min(Nt,Nr). In addition, the transmit signal at the transmit antenna array can be aligned in the direction of the transmit antenna array pattern so that the received signals add constructively at the receive antenna array. This transmit beamforming will provide a power gain in addition to the MIMO degree of freedom gain. However, in order to do transmit beamforming, the transmit antenna array must have knowledge of the channel’s state. Channel feedback in the conventional statistical MIMO channel is burdensome, due to the need to feed back information on each of the NrNt channel coefficients. The angular domain provides a much more natural, compact representation of the MIMO wireless channel than does the conventional model. In the angular domain, the transmit and receive arrays are divided into Nt and Nr respective resolvable angles, and the angular domain channel model examines the channel between the transmit and receive angular cells. The angular domain approach takes advantage of the physical nature of the wireless channel and produces a sparse channel matrix, unlike the previous conventional statistical model. As a result, less information will need to be fed back to the transmitter. This thesis applies array processing techniques to the MIMO wireless channel modeled in the angular domain to demonstrate the reduced computation complexity and feedback rate of angular domain processing.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-12-02T21:45:20Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Bunge_Brian.docx: 194253 bytes, checksum: c9aa8808e5fae8d547c7994f1cecca8b (MD5) Bunge_Brian.pdf: 928297 bytes, checksum: c918da24528483a86904abafe0335f9d (MD5)","Made available in DSpace on 2012-02-01T00:46:39Z (GMT). No. of bitstreams: 3 Bunge_Brian.pdf: 928297 bytes, checksum: c918da24528483a86904abafe0335f9d (MD5) license.txt: 4057 bytes, checksum: afffa67e8e37047978fd37735e02253d (MD5) Bunge_Brian.docx: 194253 bytes, checksum: c9aa8808e5fae8d547c7994f1cecca8b (MD5)","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by William Ingram (wingram2@illinois.edu) on 2012-02-01T00:50:23Z Item is restricted until 2014-02-01T00:50:07Z","Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:27Z Item was in collections: Graduate Theses and Dissertations at Illinois (ID: 204) Dissertations and Theses - Electrical and Computer Engineering (ID: 446) No. of bitstreams: 4 Bunge_Brian.pdf.txt: 65528 bytes, checksum: 9094fc3d8f068cf4545d379431f3fce6 (MD5) Bunge_Brian.pdf: 928297 bytes, checksum: c918da24528483a86904abafe0335f9d (MD5) license.txt: 4057 bytes, checksum: afffa67e8e37047978fd37735e02253d (MD5) Bunge_Brian.docx: 194253 bytes, checksum: c9aa8808e5fae8d547c7994f1cecca8b (MD5)","Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:27Z"],"dc:identifier":["http://hdl.handle.net/2142/29443"],"dc:language":["en"],"dc:rights":["Copyright 2011 Brian Bunge"],"dc:subject":["multiple receive antenna (MIMO)","Angular Domain","Feedback","Wireless"],"dc:title":["Feedback schemes in angular domain processing for MIMO antenna systems"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:27Z"}