An Adaptive CMMSE Receiver for Space–Time Block-Coded CDMA Systems in Frequency- Selective Fading Channels

Jung, Young-Ho; Hong, Seung-Chul; Kim, Seong Rag; Lee, Y.H.

doi:10.1109/tvt.2004.825759

Cited by 3 publications

(6 citation statements)

References 10 publications

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“…The performance of the proposed CDMA-SFBC system is compared to that of the CMMSE STBC-CDMA receiver proposed in [5] as shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

“…We evaluated the BER performance using different modulation schemes and under a wide range of values for the channel estimation error variance. The resulting downlink performances are depicted in figure set (3,4,5,6,7,8). Figures (3, 4, 5, 6) for the downlink systems show that the BER performance improves with increasing g s and decreasing channel estimation error variance r e 2 .…”

Section: Resultsmentioning

confidence: 99%

“…In the literature, there are some schemes that combine MIMO with CDMA. Jung et al proposed an adaptive constrained minimum mean square error (CMMSE) receiver for single carrier STBC-CDMA systems in [5]. In [6], STBC transceivers were presented for downlink multi carrier CDMA (MC-CDMA) systems in which a different set of subcarriers is assigned to each user.…”

Section: Introductionmentioning

confidence: 99%

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CDMA-SFBC Downlink Performance

Aldalgamouni

Elhakeem

2009

Int J Wireless Inf Networks

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In this paper a generic code division multiple access (CDMA)-space frequency block coded (SFBC) system for downlink transmission is proposed. Closed form expressions for the bit error rate (BER) performance of the proposed CDMA-SFBC downlink system are derived and numerically evaluated considering different scenarios. The closed form BER expressions are derived for both the M-ary phase shift keying (MPSK) and the M-ary quadrature amplitude modulation (MQAM) techniques considering different CDMA-SFBC configurations. The BER expressions are evaluated for a wide range of system parameters assuming Rayleigh fading. These parameters include M-ary size and channel estimation error variance. Such evaluations are crucial not only for system performance prediction, but also for network management, monitoring and future cross-layer design.

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“…The performance of the proposed CDMA-SFBC system is compared to that of the CMMSE STBC-CDMA receiver proposed in [5] as shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CDMA-SFBC Downlink Performance

Aldalgamouni

Elhakeem

2009

Int J Wireless Inf Networks

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“…By expanding JCM1{ftt», we have J (M) ( f(t» ) = t At-i l a-lfH {t)Y{I � 2 r == tx-; l a-fH (t)y(l)1 2 (12) where (i ( t)y(t) is the output of first branch of the adaptive The LCCM GSC-RLS algorithm described above has the similar procedure as in Table 1 of [8]. Finally, we can use fcAit) = fc,cAit) -B t,cAit) to obtain the fmal optimal tap weight.…”

Section: Mimo Cm-gsc-rls Algorithm With Capon Channel Estimationmentioning

confidence: 99%

New ST-BC MIMO-CDMA transceiver with augmented user signatures

Chern

Cheng

2010

2010 International Symposium on Intelligent Signal Processing and Communication Systems

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This paper presents new transceiver framework for the DS CDMA systems that use the multiple-input multiple-output (MIMO) antennas, with space-time block code (ST-BC). In the transmitter, new hybrid (prefix/postfix) zero-padding sequences combining with the desired user signature is exploited to form the hybrid augmented user signature sequences, with respect to different transmit-antennas. While in the receiver under the GSC framework a new Capon-like semi-blind MIMO-CDMA filterbank detector based on the linearly constrained constant modulus (LCCM) criterion, is derived. Also, the adaptive GSC RLS algorithm is developed for adaptively implementing the blind LCCM MIMO-CDMA filterbank of the receiver. With the specific design of the hybrid augmented user signature sequences, we are able to resolve phase ambiguity problem of blind channel estimation. Computer simulations verify the merits of the proposed new transceiver framework; it can be employed to achieve better performance, and is more robust against the discrepancy due to Capon channel estimation.

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“…Various multi-user detection (MUD) algorithms [31 [5] are usually utilized in present researches to suppress ISI and MAI in traditional MIMO-CDMA systems with single-code spreading. However, the hardware complexity is intolerable when the number of users and transmit antennas are large.…”

Section: Introductionmentioning

confidence: 99%

An Interference-free MIMO-CDMA system Spread with Orthogonal Complementary Code for Multipath Fading Scenarios

Huang

Zhu

2006

2006 International Conference on Communications, Circuits and Systems

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To overcome the problem that the performance of traditional MIMO-CDMA system would degrade badly in frequency-selective fading channel conditions, a novel interference-free MIMO-CDMA system spread with Orthogonal Complementary(OC) code is proposed in the paper. The system utilizes a novel transmitter structure, which combines OC code spreading and spatial delay multiplexing technique. Therefore, only simple correlation operation is needed at the receiver to effectively resist interferences caused by multipath propagation effect, and maximum-ratio-combination (MRC) can be employed to further resist channel fading. The proposed system provides higer BER performance and lower hardware complexity, compared with traditional MIMO-CDMA system employing singlecode spreading and VBLAST scheme. Mathematical expressions and theoretical analysis of the system are presented. Simulation results validate the perfect anti-interference properties of the proposed system.

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An Adaptive CMMSE Receiver for Space–Time Block-Coded CDMA Systems in Frequency- Selective Fading Channels

Cited by 3 publications

References 10 publications

CDMA-SFBC Downlink Performance

CDMA-SFBC Downlink Performance

New ST-BC MIMO-CDMA transceiver with augmented user signatures

An Interference-free MIMO-CDMA system Spread with Orthogonal Complementary Code for Multipath Fading Scenarios

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