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Capacity Reduction of WCDMA Downlink in the Presence of interference drom Adjacent Narrow-Band System (IEEE Transactions on Vehicular Technology, Vol. 51, No. 1, January 2002)
Bibliografi
Author:
Heiska, Kari
;
Posti, Harri
;
Muszynski, Peter
;
Aikio, Pauli
;
Numminen, Jussi
;
Hämäläinen, Miikka
Topik:
Capacity
;
Interference
;
Mobile communications
;
Wide-band code-division multiple access (WCDMA).
Bahasa:
(EN )
Tahun Terbit:
2002
Jenis:
Article - diterbitkan di jurnal ilmiah internasional
Fulltext:
heiska2002.pdf
(661.96KB;
0 download
)
Abstract
One of the main challenges when implementing the
future mobile multimedia networks is the cost-effective network evolution from second- to third-generation systems. This evolution path may include the use of different technologies at the same
frequency band. The performance of the wide-band code-division multiple-access (WCDMA) downlink is studied in this paper in the case when there are narrow-band (NB) interference sources at the adjacent frequencies. A simple, analytical method to calculate the downlink capacity reduction of the WCDMA macrocell in this case is presented. The analysis takes into account different downlink interference mechanisms: wide-band noise from
the transmitter as well as adjacent channel interference, intermodulation, and cross-modulation originating in the mobile receiver.
The effect of each interference component to the capacity of the WCDMA macrocellular network has been evaluated with numerical examples. The analysis shows that capacity per cell is sensitive
to the cell size, and therefore very careful network planning is needed in order to operate the WCDMA networks efficiently. Results of this paper can be utilized when implementing theWCDMA system to the same band with existing narrow-band systems, for instance, with the PCS 1900 band in United States and GSM 1800 band in Europe.
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