FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2238787534> ?p ?o ?g. }

• W2238787534 abstract "Conventional versions of linear multiuser detectors (MUD) are not feasible in the wideband code division multiple access (WCDMA) downlink due to the use of long scrambling sequences. As an alternative, linear channel equalizers restore the orthogonality of the spreading sequences lost in frequency-selective channels, thus, suppressing multiple access interference (MAI) in the WCDMA downlink. In this thesis, linear channel equalizers in WCDMA terminals are studied. The purpose of the thesis is to develop novel receivers that provide performance enhancement over conventional rake receivers with an acceptable increase in complexity, and to validate their performance under WCDMA downlink conditions. Although the WCDMA standard is emphasized as the candidate system, the receivers presented are suitable for any synchronous direct sequence code division multiple access downlink employing coherent data detection and orthogonal user or channel separation. Two adaptive channel equalizers are developed based on the constrained minimum output energy (MOE) criterion and sample matrix inversion method. An existing equalizer based on the matrix inversion lemma is also developed further to become a prefilter-rake equalizer. Performance analysis is carried out for equalizers trained using a common pilot channel and for the channel response constrained MOE (CR-MOE) and sample matrix inversion (SMI) based equalizers developed in the thesis. The linear minimum mean square error (LMMSE) channel equalizer, which assumes a random scrambling sequence, is shown to approximate the performance of the LMMSE MUD. The adaptive CR-MOE, SMI-based, and prefilter-rake equalizers are observed to attain performance close to that of an approximate LMMSE channel equalizer. The equalizers considered are also shown to be suitable for implementation with fixed-point arithmetic. The SMI-based equalizer is shown to provide good performance and to require an acceptable increase in complexity. It is also well suited for symbol rate equalization after despreading, which allows for computationally efficient receiver designs for low data rate terminals. Hence, the SMI-based equalizer is a suitable receiver candidate for both high and low data rate terminals. Adaptive equalizers are considered in conjunction with forward error correction (FEC) coding, soft handover, transmit diversity and high speed downlink packet access (HSDPA). The adaptive equalizers are shown to provide significant performance gains over the rake receiver in frequency selective channels. The performance gains provided by one antenna equalizers are noted to decrease near the edges of a cell, whereas the equalizers with two receive antennas achieve significant performance improvements also with soft handover. The performance gains of one or two antenna equalizers are shown to be marginal in conjunction with transmit antenna diversity. Otherwise the equalizers are observed to attain good signal-to-noise-plus-interference ratio performance. Therefore, they are also suitable receiver candidates for HSDPA." @default.
• W2238787534 created "2016-06-24" @default.
• W2238787534 creator A5002532839 @default.
• W2238787534 date "2003-01-01" @default.
• W2238787534 modified "2023-09-27" @default.
• W2238787534 title "Equalization in WCDMA Terminals" @default.
• W2238787534 cites W136593697 @default.
• W2238787534 cites W1491727270 @default.
• W2238787534 cites W1492221128 @default.
• W2238787534 cites W1495311907 @default.
• W2238787534 cites W1506809288 @default.
• W2238787534 cites W1507019847 @default.
• W2238787534 cites W1513478597 @default.
• W2238787534 cites W1523326940 @default.
• W2238787534 cites W1523437904 @default.
• W2238787534 cites W1525552993 @default.
• W2238787534 cites W1526575231 @default.
• W2238787534 cites W1538148134 @default.
• W2238787534 cites W1545221733 @default.
• W2238787534 cites W1558682034 @default.
• W2238787534 cites W1558763254 @default.
• W2238787534 cites W1559317922 @default.
• W2238787534 cites W1562979145 @default.
• W2238787534 cites W1574867929 @default.
• W2238787534 cites W1577726620 @default.
• W2238787534 cites W1582982049 @default.
• W2238787534 cites W1602659231 @default.
• W2238787534 cites W1625700852 @default.
• W2238787534 cites W165494849 @default.
• W2238787534 cites W1816134936 @default.
• W2238787534 cites W1828690114 @default.
• W2238787534 cites W1839416498 @default.
• W2238787534 cites W1858340958 @default.
• W2238787534 cites W1865537602 @default.
• W2238787534 cites W1869376184 @default.
• W2238787534 cites W1892502794 @default.
• W2238787534 cites W1914041559 @default.
• W2238787534 cites W1920557855 @default.
• W2238787534 cites W1931505599 @default.
• W2238787534 cites W1944795098 @default.
• W2238787534 cites W1948007695 @default.
• W2238787534 cites W1954450694 @default.
• W2238787534 cites W1958662171 @default.
• W2238787534 cites W1963095305 @default.
• W2238787534 cites W1965392255 @default.
• W2238787534 cites W1965397739 @default.
• W2238787534 cites W1967267438 @default.
• W2238787534 cites W1974154802 @default.
• W2238787534 cites W1980201978 @default.
• W2238787534 cites W2000241254 @default.
• W2238787534 cites W2010530687 @default.
• W2238787534 cites W2012105876 @default.
• W2238787534 cites W2012320120 @default.
• W2238787534 cites W2014305823 @default.
• W2238787534 cites W2014325677 @default.
• W2238787534 cites W2017059721 @default.
• W2238787534 cites W2030319782 @default.
• W2238787534 cites W2031572453 @default.
• W2238787534 cites W2052069121 @default.
• W2238787534 cites W2056296026 @default.
• W2238787534 cites W2059786462 @default.
• W2238787534 cites W2059830361 @default.
• W2238787534 cites W2064959416 @default.
• W2238787534 cites W2065816559 @default.
• W2238787534 cites W2081913144 @default.
• W2238787534 cites W2090527256 @default.
• W2238787534 cites W2090589668 @default.
• W2238787534 cites W2091560752 @default.
• W2238787534 cites W2096915734 @default.
• W2238787534 cites W2098085914 @default.
• W2238787534 cites W2098140832 @default.
• W2238787534 cites W2100420648 @default.
• W2238787534 cites W2101609516 @default.
• W2238787534 cites W2101617851 @default.
• W2238787534 cites W2103325786 @default.
• W2238787534 cites W2104172790 @default.
• W2238787534 cites W2105707423 @default.
• W2238787534 cites W2107080958 @default.
• W2238787534 cites W2108025213 @default.
• W2238787534 cites W2108656301 @default.
• W2238787534 cites W2109133913 @default.
• W2238787534 cites W2109626466 @default.
• W2238787534 cites W2109808436 @default.
• W2238787534 cites W2110387359 @default.
• W2238787534 cites W2110436955 @default.
• W2238787534 cites W2111040297 @default.
• W2238787534 cites W2112276742 @default.
• W2238787534 cites W2112989249 @default.
• W2238787534 cites W2113247483 @default.
• W2238787534 cites W2113257283 @default.
• W2238787534 cites W2114129129 @default.
• W2238787534 cites W2115151494 @default.
• W2238787534 cites W2117507580 @default.
• W2238787534 cites W2117664067 @default.
• W2238787534 cites W2118040894 @default.
• W2238787534 cites W2118680781 @default.
• W2238787534 cites W2125968360 @default.
• W2238787534 cites W2126508692 @default.
• W2238787534 cites W2128261358 @default.
• W2238787534 cites W2130054326 @default.

• next