TY - GEN
T1 - Dual-transceiver quantization can improve error performance in CDMA
AU - Efraim, Hadar
AU - Yacov, Nadav
AU - Kanter, Ido
AU - Shental, Ori
PY - 2008
Y1 - 2008
N2 - A K-user direct-sequence spread-spectrum code-division multiple-access (CDMA) system with (g ≪ log2 it)-bit baseband signal quantization at the demodulator is considered. It is shown that additionally quantizing the K + 1 level output signal of the CDMA modulator into q bits improves significantly the average bit-error performance in a non-negligible regime of noise variance, α2, and user load,β, under various system settings, like additive white Gaussian noise (AWGN), Rayleigh fading, single-user detection, multi-user detection, random and orthogonal spreading codes. For the case of single-user detection in random spreading AWGN-CDMA, this regime is identified explicitly as α < γ(q)√β,where γ(q) is a certain pre-factor depending on q, and the associated BER improvement is derived analytically for q = 1,2. For the other examined system settings, computer simulations are provided, corroborating this interesting behavior.
AB - A K-user direct-sequence spread-spectrum code-division multiple-access (CDMA) system with (g ≪ log2 it)-bit baseband signal quantization at the demodulator is considered. It is shown that additionally quantizing the K + 1 level output signal of the CDMA modulator into q bits improves significantly the average bit-error performance in a non-negligible regime of noise variance, α2, and user load,β, under various system settings, like additive white Gaussian noise (AWGN), Rayleigh fading, single-user detection, multi-user detection, random and orthogonal spreading codes. For the case of single-user detection in random spreading AWGN-CDMA, this regime is identified explicitly as α < γ(q)√β,where γ(q) is a certain pre-factor depending on q, and the associated BER improvement is derived analytically for q = 1,2. For the other examined system settings, computer simulations are provided, corroborating this interesting behavior.
UR - http://www.scopus.com/inward/record.url?scp=57849134018&partnerID=8YFLogxK
U2 - 10.1109/isssta.2008.21
DO - 10.1109/isssta.2008.21
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AN - SCOPUS:57849134018
SN - 9781424422043
T3 - IEEE International Symposium on Spread Spectrum Techniques and Applications
SP - 79
EP - 84
BT - 2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications - Proceedings, ISSSTA2008
T2 - 2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications, ISSSTA2008
Y2 - 25 August 2008 through 28 August 2008
ER -