Title :
SAIC receiver algorithms for VAMOS downlink transmission
Author :
Vutukuri, Mahesh Gupta ; Malladi, Rakesh ; Kuchi, Kiran ; Koilpillai, R. David
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai, India
Abstract :
Voice services over Adaptive Multiuser channel in One Slot (VAMOS) performance in the presence of GMSK interferer is presented. Widely-Linear (WL) MMSE filtering is used to cancel the co-channel GMSK interferer while performing α-QPSK detection. In this paper, two ways of estimating the Sub Channel Power Imbalance Ratio (SCPIR) are discussed. Due to the colouration of the resultant impairment after filtering, WL metric is proposed which incorporates error covariance between I/Q components in the metric computation. WL RSSE is used as the equalizer. Simulation results using the proposed receiver architecture show significant performance important over conventional VAMOS receivers.
Keywords :
cochannel interference; interference suppression; least mean squares methods; multiuser channels; quadrature phase shift keying; radio receivers; voice communication; α-QPSK detection; MMSE filtering; SAIC receiver; SCPIR; VAMOS downlink transmission; cochannel GMSK interferer; error covariance; single antenna interference cancellation; sub channel power imbalance ratio; voice services over adaptive multiuser channel in one slot; Bit error rate; GSM; Interference; Maximum likelihood estimation; Measurement; Receivers;
Conference_Titel :
Wireless Communication Systems (ISWCS), 2011 8th International Symposium on
Conference_Location :
Aachen
Print_ISBN :
978-1-61284-403-9
Electronic_ISBN :
2154-0217
DOI :
10.1109/ISWCS.2011.6125304
