Prediction of a CDMA output spectrum based on intermodulation products of two-tone test
A prediction method of a code-division multiple-access (CDMA) output spectrum based on intermodulation (IM) products of a two-tone test is proposed in this paper. An RF power amplifier is mathematically modeled by a complex envelope transfer function and, using this model, analytical expressions of...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2001-05, Vol.49 (5), p.938-946 |
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| container_end_page | 946 |
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| container_issue | 5 |
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| container_title | IEEE transactions on microwave theory and techniques |
| container_volume | 49 |
| creator | Yi, Seung-June Nam, Sangwook Oh, Sung-Hoon Han, Jae-Hee |
| description | A prediction method of a code-division multiple-access (CDMA) output spectrum based on intermodulation (IM) products of a two-tone test is proposed in this paper. An RF power amplifier is mathematically modeled by a complex envelope transfer function and, using this model, analytical expressions of IM products and a CDMA output spectrum are derived, respectively. By combining these two expressions, we finally derive an analytical expression that relates IM products to a CDMA output spectrum. It is shown in this expression that not only AM-AM, but also AM-PM distortion affects the CDMA output spectrum. Comparison between the measured and predicted results shows that the output spectrum predicted by this method agrees well with the measured spectrum. |
| doi_str_mv | 10.1109/22.920152 |
| format | Article |
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An RF power amplifier is mathematically modeled by a complex envelope transfer function and, using this model, analytical expressions of IM products and a CDMA output spectrum are derived, respectively. By combining these two expressions, we finally derive an analytical expression that relates IM products to a CDMA output spectrum. It is shown in this expression that not only AM-AM, but also AM-PM distortion affects the CDMA output spectrum. Comparison between the measured and predicted results shows that the output spectrum predicted by this method agrees well with the measured spectrum.</description><identifier>ISSN: 0018-9480</identifier><identifier>EISSN: 1557-9670</identifier><identifier>DOI: 10.1109/22.920152</identifier><identifier>CODEN: IETMAB</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Analytical models ; Code division multiple access ; Distortion ; Distortion measurement ; Exact solutions ; Intermodulation ; Mathematical analysis ; Mathematical model ; Mathematical models ; Microwaves ; Multiaccess communication ; Power amplifiers ; Prediction methods ; Radio frequencies ; Radio frequency ; Radiofrequency amplifiers ; Testing ; Transfer functions</subject><ispartof>IEEE transactions on microwave theory and techniques, 2001-05, Vol.49 (5), p.938-946</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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An RF power amplifier is mathematically modeled by a complex envelope transfer function and, using this model, analytical expressions of IM products and a CDMA output spectrum are derived, respectively. By combining these two expressions, we finally derive an analytical expression that relates IM products to a CDMA output spectrum. It is shown in this expression that not only AM-AM, but also AM-PM distortion affects the CDMA output spectrum. Comparison between the measured and predicted results shows that the output spectrum predicted by this method agrees well with the measured spectrum.</description><subject>Analytical models</subject><subject>Code division multiple access</subject><subject>Distortion</subject><subject>Distortion measurement</subject><subject>Exact solutions</subject><subject>Intermodulation</subject><subject>Mathematical analysis</subject><subject>Mathematical model</subject><subject>Mathematical models</subject><subject>Microwaves</subject><subject>Multiaccess communication</subject><subject>Power amplifiers</subject><subject>Prediction methods</subject><subject>Radio frequencies</subject><subject>Radio frequency</subject><subject>Radiofrequency amplifiers</subject><subject>Testing</subject><subject>Transfer functions</subject><issn>0018-9480</issn><issn>1557-9670</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqF0b1LxDAUAPAgCp6ng6tTcFAceub7Y5TzE050OHAsaZtCj7apSYr435uzh4ODTkl4v_eSlwfAKUYLjJG-JmShCcKc7IEZ5lxmWki0D2YIYZVpptAhOAphk46MIzUDb6_eVk0ZG9dDV0MDl7fPN9CNcRgjDIMtox87WJhgK5hI00frO1eNrflOGXzalzFsc-OHy6LrLYw2xGNwUJs22JPdOgfr-7v18jFbvTw8LW9WWckQiRlWsqC8MIZrZVjNlNLSGllShKgR2gqKkpNI6ArRAheaEkK5tIxRUhFG5-ByKpse8j6me_OuCaVtW9NbN4ZcYya4FlwkefGnJIql4gr_D4VGgiqZ4PkvuHGj71O3uVLpp7WiOqGrCZXeheBtnQ--6Yz_zDHKtxPLCcmniSV7NtnGWvvjdsEv0NqN_g</recordid><startdate>20010501</startdate><enddate>20010501</enddate><creator>Yi, Seung-June</creator><creator>Nam, Sangwook</creator><creator>Oh, Sung-Hoon</creator><creator>Han, Jae-Hee</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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An RF power amplifier is mathematically modeled by a complex envelope transfer function and, using this model, analytical expressions of IM products and a CDMA output spectrum are derived, respectively. By combining these two expressions, we finally derive an analytical expression that relates IM products to a CDMA output spectrum. It is shown in this expression that not only AM-AM, but also AM-PM distortion affects the CDMA output spectrum. Comparison between the measured and predicted results shows that the output spectrum predicted by this method agrees well with the measured spectrum.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/22.920152</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Analytical models Code division multiple access Distortion Distortion measurement Exact solutions Intermodulation Mathematical analysis Mathematical model Mathematical models Microwaves Multiaccess communication Power amplifiers Prediction methods Radio frequencies Radio frequency Radiofrequency amplifiers Testing Transfer functions |
| title | Prediction of a CDMA output spectrum based on intermodulation products of two-tone test |
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