Analysis of CDMA signal spectral regrowth and waveform quality
Closed-form expressions for the spectral regrowth and waveform quality of a reverse-link code divison multiple access (CDMA) signal passed through a weakly nonlinear circuit are derived using the power series and statistical methods. The third-order nonlinearity is expressed in terms of IP/sub 3/ to...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2001-12, Vol.49 (12), p.2306-2314 |
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| container_title | IEEE transactions on microwave theory and techniques |
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| creator | Aparin, V. |
| description | Closed-form expressions for the spectral regrowth and waveform quality of a reverse-link code divison multiple access (CDMA) signal passed through a weakly nonlinear circuit are derived using the power series and statistical methods. The third-order nonlinearity is expressed in terms of IP/sub 3/ to include the memory effects of the circuit in-band and out-of-band reactances. The analysis is based on a time-domain model of the signal that gives more accurate distortion estimates than the widely used Gaussian approximation. The model is used to derive the probability density function and other statistical properties of the CDMA signal to compare them to the Gaussian noise properties. Differences in statistics and distortions of OQPSK and QPSK modulated signals are discussed. |
| doi_str_mv | 10.1109/22.971614 |
| format | Article |
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The third-order nonlinearity is expressed in terms of IP/sub 3/ to include the memory effects of the circuit in-band and out-of-band reactances. The analysis is based on a time-domain model of the signal that gives more accurate distortion estimates than the widely used Gaussian approximation. The model is used to derive the probability density function and other statistical properties of the CDMA signal to compare them to the Gaussian noise properties. Differences in statistics and distortions of OQPSK and QPSK modulated signals are discussed.</description><identifier>ISSN: 0018-9480</identifier><identifier>EISSN: 1557-9670</identifier><identifier>DOI: 10.1109/22.971614</identifier><identifier>CODEN: IETMAB</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Circuits ; Closed-form solution ; Code division multiple access ; Distortion ; Gaussian ; Gaussian approximation ; Gaussian noise ; Mathematical analysis ; Multiaccess communication ; Nonlinear circuits ; Nonlinear distortion ; Nonlinearity ; Probability density function ; Signal analysis ; Spectra ; Statistical analysis ; Time domain analysis ; Waveforms</subject><ispartof>IEEE transactions on microwave theory and techniques, 2001-12, Vol.49 (12), p.2306-2314</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Differences in statistics and distortions of OQPSK and QPSK modulated signals are discussed.</description><subject>Circuits</subject><subject>Closed-form solution</subject><subject>Code division multiple access</subject><subject>Distortion</subject><subject>Gaussian</subject><subject>Gaussian approximation</subject><subject>Gaussian noise</subject><subject>Mathematical analysis</subject><subject>Multiaccess communication</subject><subject>Nonlinear circuits</subject><subject>Nonlinear distortion</subject><subject>Nonlinearity</subject><subject>Probability density function</subject><subject>Signal analysis</subject><subject>Spectra</subject><subject>Statistical analysis</subject><subject>Time domain analysis</subject><subject>Waveforms</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>eNqF0TtPwzAQAGALgUQpDKxMEQOIIcXvx4JUladUxAKz5Th2SZU2rZ1Q9d_jKhUDA3g5392nG-4AOEdwhBBUtxiPlEAc0QMwQIyJXHEBD8EAQiRzRSU8BicxzlNKGZQDcDdemnobq5g1Ppvcv46zWM1SKYsrZ9uQPsHNQrNpPzOzLLON-XK-CYts3Zm6aren4MibOrqzfRyCj8eH98lzPn17epmMp7klXLS5tNZC4o1ypeLGYlV6RRkpDBHcFdw7iX3BjDGCS2EkLxykgpYeO8Y4ZoYMwXU_dxWadediqxdVtK6uzdI1XdQKUc7I7g3B1Z8SS0q4IvB_yCVOUCZ4-QvOmy6kHUUtJZUIIY4TuumRDU2MwXm9CtXChK1GUO8uozHW_WWSveht5Zz7cfvmN7jeh0o</recordid><startdate>20011201</startdate><enddate>20011201</enddate><creator>Aparin, V.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Circuits Closed-form solution Code division multiple access Distortion Gaussian Gaussian approximation Gaussian noise Mathematical analysis Multiaccess communication Nonlinear circuits Nonlinear distortion Nonlinearity Probability density function Signal analysis Spectra Statistical analysis Time domain analysis Waveforms |
| title | Analysis of CDMA signal spectral regrowth and waveform quality |
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