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2006

On the performance of multicarrier DS-CDMA with imperfect power control and variable spreading factors

8 years 10 months ago
On the performance of multicarrier DS-CDMA with imperfect power control and variable spreading factors
Multicarrier direct-sequence code-division multiple access (MC-DS-CDMA) becomes an attractive technique for the future fourth-generation (4G) wireless system because it can flexibly adapt transmission rates by changing both time and frequency spreading factors and possesses many physical-layer advantages in dispersive fading channels. However, power control errors (PCE) and the complete multiple access interference (MAI) from all the intersubcarriers may significantly degrade the performance of the MC-DS-CDMA system. In this paper, we propose an analytical method to evaluate the joint effects of the PCE and the complete MAI on the multirate MC-DS-CDMA system. From analysis and simulation, we obtain some important insights into the performance issues of the MC-DS-CDMA system. First, the effect of PCE can exacerbate the impact of the complete MAI on the MC-DS-CDMA system, or vice versa. For BER = 10 3 in a considered case, the joint effect of the complete MAI and PCE further degrades the...
Li-Chun Wang, Chih-Wen Chang
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2006
Where JSAC
Authors Li-Chun Wang, Chih-Wen Chang
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