TY - GEN
T1 - Scalar quantizer based feedback of the Channel Direction Information in MU-MISO systems
AU - Slim, Israa
AU - Mezghani, Amine
AU - Nossek, Josef A.
PY - 2011
Y1 - 2011
N2 - The availability of the Channel State Information (CSI) at the transmitter is crucial for the precoder design in Multi-user Multiple Input Single Output (MU-MISO) systems. In Frequency Division Duplex (FDD) systems, CSI can be just available at the transmitter through a limited feedback channel [1], where we assume that each user estimates, normalizes, and finally quantizes its channel direction with a finite number of quantization bits relayed back error-free and quasi-instantaneous. In this paper, we consider a simple sequential uniform scalar quantization (SQ) scheme of the individual components (real and imaginary parts) of the Channel Direction Information (CDI). Although vector quantization (VQ) schemes [2], [3] still outperform this scalar scheme in terms of quantization error and Bit Error Rate (BER), the former scheme suffers from an exponential search complexity and high storage requirements at the receiver for high number of feedback bits.
AB - The availability of the Channel State Information (CSI) at the transmitter is crucial for the precoder design in Multi-user Multiple Input Single Output (MU-MISO) systems. In Frequency Division Duplex (FDD) systems, CSI can be just available at the transmitter through a limited feedback channel [1], where we assume that each user estimates, normalizes, and finally quantizes its channel direction with a finite number of quantization bits relayed back error-free and quasi-instantaneous. In this paper, we consider a simple sequential uniform scalar quantization (SQ) scheme of the individual components (real and imaginary parts) of the Channel Direction Information (CDI). Although vector quantization (VQ) schemes [2], [3] still outperform this scalar scheme in terms of quantization error and Bit Error Rate (BER), the former scheme suffers from an exponential search complexity and high storage requirements at the receiver for high number of feedback bits.
UR - http://www.scopus.com/inward/record.url?scp=79960861155&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2011.5937660
DO - 10.1109/ISCAS.2011.5937660
M3 - Conference contribution
AN - SCOPUS:79960861155
SN - 9781424494736
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 693
EP - 696
BT - 2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011
T2 - 2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011
Y2 - 15 May 2011 through 18 May 2011
ER -