MAI Analysis of an Asynchronous MC-CDMA System With Polarization Diversity
نویسندگان
چکیده
The use of polarization antenna diversity techniques in mobile communications can improve system robustness against multipath fading. However, when used in asynchronous CDMA transmission, an increase in the carrier to noise ratio (CNR) does not automatically imply an increase in the received signal to noise ratio (SNR), due to the possibility of an increase in multiple access interference (MAI). We present a derivation of the signal to interference plus noise ratio (SINR) and calculate the average bit error rate (BER) of an uplink MC-CDMA system using polarization diversity reception at the base station. The results show that even though the use of polarization diversity introduces additional MAI, the resulting increase in the signal power was able to give an overall improvement in the performance of the SNR and average BER.
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